CA2082072A1 - Container and method for manufacturing the same - Google Patents
Container and method for manufacturing the sameInfo
- Publication number
- CA2082072A1 CA2082072A1 CA002082072A CA2082072A CA2082072A1 CA 2082072 A1 CA2082072 A1 CA 2082072A1 CA 002082072 A CA002082072 A CA 002082072A CA 2082072 A CA2082072 A CA 2082072A CA 2082072 A1 CA2082072 A1 CA 2082072A1
- Authority
- CA
- Canada
- Prior art keywords
- subsection
- weld
- side edge
- fold
- weld line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/008—Standing pouches, i.e. "Standbeutel"
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
- B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/30—Construction of flexible containers having corrugated or pleated walls
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
- Y10S493/916—Pliable container
- Y10S493/936—Square bottom
Abstract
A container (10) and method of making the same preferably from a single web of flexible material wherein the method comprises placing a V-fold, or modified flat V-fold, in a sheet of such material, creating two subsections whose V-fold members (58, 60) are attached to the respective subsections preferably along a longitudinal fold line. First and second side edge weld lines (100 a,b) are made thereby connecting the respective subsections to their own V-fold members (58, 60) as well as those of the opposite subsections. Oblique weld lines (86, 88) then interconnect the point of intersection of the side edge weld lines (66, 76) and longitudinal fold line. The bottom wall (20) is formed by folding the legs (80, 82) inwardly with the endmost portions of which pivoting along a lateral axis of the bottom wall (20) upwardly towards the first and second side edge weld line (100 a,b) thereby reinforcing the stress-bearing bottom.
Description
WO91/1708~ -1- 2 0 8 2 0 7 ~pCTtUS9l/02992 CONTAINER AND METHOD FOR MANUFACTURING THE SAME
TECHNICAL FIELD
The present invention relates to the packaging industry, and more particularly to a flexible container, as well as a method for making same.
Traditional means for packaging products, particularly liquids, have included metal cans and glass and plastic bottles. Cans and bottles have the advantage of being hermetically sealable, are of sturdy construction, and may be stored in a self-supported upright position.
However, a number of problems exist in the use of cans and bottles. For example, their production methods are complicated and expensive. The raw materials used in producing such containers are also expensive.
Furthermore, ~raditional cans and bottles present environmental problems in that, even in their empty state, they occupy a relatively large amount of space, whether it bP at a landfill or in a kitchen garbage can. Finally, cans and bottl~s are rather heavy and therefore are inconvenient and expensive to transport.
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` 30 BACXGROUND ART
; In an attempt to overcome the reliance upon cans and bottles, packagers have recently be~un to use flexible, ~usible sheet material in forming disposable 35 containers, such as found in U.S. Patent No. 3,380,646 tu Doyen et al. and U.S. Patent No. 4,287,247 to Reil et al.
Such containers are problematic, however, in that they have interior crevices in their bottoms and corners which may act as bacterial traps. Furthermore, they must be , . , .
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WO~I/l7089 PCT/VS91/02992 produced from relatively thick, and therefore expensive, retort material to be capable of standing upright without support. Even if manufactured with such thick material, the packages are typically unstable and must be supported on the shelves of a store by a box or other means. Once purchased and opened, consumers have to empty the contents of the containers into pitchers or other storage means.
Also, the flexible containers used to date usually have at least one weld on their interior bottom wall, which is the location of the most pressure from liquid or other packaged products. As a result, there is a structural weakness at the bottom portions of most currently used containers.
The methods employed in producing the currently used flexible containers are complicated in that they require a relatively large number of welding steps, many of which ~ust be performed while the container ~aterial is in a vertical orientation. As a result, the apparatus for forming the container i9 by necessity complicated and expensive.
There exists a need, therefore, for a container which is hermetically sealable, lightweight, and which is flexible so as not to occupy a large volume of space when emptied.
There exists a further need for a flexible container which has no interior crevices, which can be produced from relatively thin material, and which is sturdy, particularly alon~ its bottom.
There also exists a need for a method of producing such a container which provides effective seals yet i~ simple, ~uic~, and inexpensive.
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WO~1/17089 2 0 8 2 ~ ~ ~ PCT~US91/02992 DISCLOSURE OF THE INVENTION
The present invention relates to a container having a front wall, a rear wall, a pair of sidewalls, and a reinforced bottom wall. The bottom wall is preferably comprised of a plurality of folded leg members extending from the lower edges of the front and rear walls. The lower portions of the sidewalls are reinforced with the folded-up endmost portions of the folded leg members. The top edges of the container may be welded closed to form a hermetically sealed package.
A method of making a container from flexible material comprises placing a V-fold, or a modified flat V-fold, in a sheet of flexible material to form anintermediate structure having a first su~section, a second subsection underlying the first subsection and a V-fold section intermediate the first and lower edge of the second subsections having a first ~-fold me~ber attached to the lower edge of the first subsection and a second V-fold mem~er attached to the lower edge of the second subsection. The first and second V-fold members are preferably connected along a longitudinal ~old line.
A first side edge weld line is made connecting the upper edges with the lower edges to weld the first subsection to both the second subsection and the first V-fold member and at the same time to weld the second subsection to the second V-fold member. A second side edge weld line is made a distance from the firs~ side edge weld line connecting the upper edges with the ]ower edges-to weld the first subsection to both the second subsection and the first V-fold membar and at the same time to weld the second subsection to the second V-fold member. The side sdge welds result in the formation of an upper container portion and first and second leg portions, which are connected along the first fold line.
W091/17089 2 ~ 8 % 0 7 ~ PCTtUS9ltO2992 ~^
, A first oblique weld line is made interconnecting the point of intersection of the first weld line and the first fold line to the lower edge of the first subsection. A second oblique weld line is made interconnecting the point of intersection of the second side edge weld line and the longitudinal fold line to the lower edge of the first subsection. A leg weld line maybe made between the first and second side edge weld lines at approximately the middle point of the first leg to weld the first subsection to both the first V-fold member and the second subsection the second V-fold member.
The bottom wall is formed by folding the first leg inwardly towards the first fold line so that the lower edge of the first subsection is adjacent the first fold line and folding the second leg inwardly towards the first fold line so that the lower edge of the second subsection is adjacent the longitudinal fold line. Upon separating the first subsection from the second subsection, an interior space is formed between the first and second side edge weld lines and the endmost portions of the legs pivot along the lateral axis of the bottom wall upwardly towards the first and second side edge weld lines. one of the endmost portions is attached to the first side edge weld line and the remaining endmost portion is attached to the second side edge weld line to form reinforced container side edges.
The container of the present invention has a number of significant attributes. For example, the bottom and lower side walls of the container, which are subjected to the most pressure by the contents of the container, are reinforced by multiple plys of container material, yet the container bottom is free from any debilitating internal weld. The present container may also have deeper side walls than those previously known.
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~ W~91/1708~ 2 ~ 8 2 0 7 2 PCT/US91/02992 Furthermore, the container can be produced from relatively thin material and therefore is lighter and less expensive to manufacture and transport than containers requiring thick material. This is especially useful when the container is made from flexible material, which is expensive. The thinness of the container walls also encourages the use of biodegradable materials, which have traditionally been thin. Still, the container i5 capable of standing vertically on its own, both during the filling process and when on a grocery or refrigerator shelf without the need of an outer box or other supporting means. The present invention therefore eliminates the need for transferring the contents into a pitcher or other containment means after opening. The fact that there are no crevices in the interior of the container minimi~es the worry about bacteria-traps when storing the opened container between uses. This also ena~les the container to be used as a mixing bowl, such as for foods or other items to which water is added.
Also, once the product is used and the container i~ empty, the walls of the container will collapse back to its flat state. This will resu:Lt in the waste container occupying far less volume in the family trash, as well as in a land~ill, than the commonly used can ~r plastic bottle.
The method of producing the present in~ention is also advantageous. For example, the entire container may, 3~ in one embodiment, be producPd using a single web of material. Also, the number of welds needed to be made are minimized and the entire production process prior to filling may, if desired, be performed while the web ~ material is traveling in a horizontal plane.
overall, the container of ~he present invention ~ .
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possesses many of the attributes of a can or bottle, but at the same time eliminates many of the negatives. Also, the method of manufacturing of the present invention is efficient and ine~pensive.
Figure 1 is a perspective view of one embodiment of the container of the present invention.
Figure 2 is a schematic of an apparatus for manufacturing the container of the present invention.
Figure 3 is a perspective view of one embodiment of the intermediate structure of the container of the present invention.
Figure 4 is a top view of one embodiment of the intermediate structure of the container of the present invention.
Figure 5 is a top view of one embodiment of the intermediate structure of the container of the present invention illustrating the preferred position of the side edga weld lines.
Figure 6 is a perspective view of the intermediate structure of Figure 5 illustrating separated legs.
`~ Figure 7 is a top view of the intermediate structure of Figure 4 illustrating the preferred position o~ the oblique weld lines.
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, W~ ~31/1~0~9 2 0 8 2 0 7 2 P~T/US91/02992 Figure 8 is a perspective view of theintermediate structure of Figure 7 illustrating separated legs.
Figure 9 is a top view of the intermediate structure illustrating the preferred position of the leg weld line.
Figure 10 is a perspective view of the intermediate structure having one leg folded.
Figure 11 is a perspective view of the intermediate structure having both legs folded.
Figure 12 is a cross-sectional view of the lower portion of the container of the present invention in its collapsecl state.
Figure 13 is a top view of an intermediate structure wherein one leg is longer than the other.
Figure 14 is a cross-sectional view of the lower portion of the intermediate structure having legs of different sizes in folded position.
Figure 15 is a perspective view of one embodiment of the intermediate structure having the corner portions of the legs removed.
Figure 16 is a cross-sectional view of the container of th& present invention in partially opened condition.
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Figure 17 is a cross-sectional view of the container of the present invention in fully opened condition.
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W~l/17~89 PCT/US91/02992 \~
Figure 18 is a persp,ectivP view of one embodiment of the container of the present invention having partially separated subsections.
Figure 19 is a perspective view of one embodiment of the container of the present invention having fully separated subsections.
Figure 20 is a perspective view of the intermediate structure having both legs folded and having one ply of the endmost portions of the leg removed.
Figure 21 is a perspective view of one embodiment of the container of the present invention having its sidewalls folded inwardly.
Figure 22 is a perspective view of one embodiment of the container of the present invention having a filling nozzle insertecl between its subsections.
Figure 23 is a perspective view of one embodiment of the container of t.he present invention having sealed top edges.
Figure 24 is a perspective view of one embodiment of the container of the present invention ha~ing thicXly sealed top edges.
Figure 25 is a schematic of an apparatus for manufacturing the container of the present invention from multiple w~bs of mater1al.
Figure 26 is a perspective view of an intermediate structure manufactured using multiple webs of mater~al.
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9 1 / 0 2 ~J 9 2 - g ~P~ S 2 7 ~l nv ~9 Figure 27 is a perspective view of one embodiment of the container of the present invention having reinforced side edges.
s Figure 28 is a cross~sectional view of an intermediate structure having a middle member in its V-~old section.
Fig. 1 illustrates a flexible container 10 of the present invention. The container 10 has a front wall 12, a rear wall 14, a pair of sidewalls 16, 18 and a reinforced bottom wall 20. As illustrated in Fig. 12, the bottom wall 20 is preferably comprised of a pair of folded leg members 80, 82 extending from the lower edges of the front and rear walls 12, 14. The lower portions of the sidewalls 16, 18 are re:Lnforced with endmost portions 112,114, which are integral with the folded leg members 80, 82. The top edge ;28 of the container 10 may be welded closed to form a hermetically sealed package.
Leg weld line 100a is located at the intersection of the front wall 12 and the bottom wall 20, and leg weld line 100b is located at the intersection of the rear wall 14 and the bottom wall 20, both for further maintaining the contain~r 10 in upright position. The weld lines 100a,b also reinforce the intersection of the front wall 12 and the bottom wall 20 and prevent flex-cracking of container màterial, particularly aluminum foil type material.
Fig. 2 illustrates an apparatl~s 30 which may be used to manufacture the container 10 of the present invention. A single web 32 of container material 34 is delivered from a roller 36 to a standard V-plow 38. The V-plow 38 creates a V-fold in the approximate center of the material 34, such as shown in Fig. 3, and the ` .
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pr,~/lJS 2 ~1 ~10~/ ~991 material 34 is passed through the remaininy processes along a conveyor belt 42, preferably in a horizontal orientation.
As shown in Fig. 3, an lntermediate structure 40 has a first subsection 44 having an upper edge ~6 and a lower edge 48, a second subsection 50 underlying the first subsection 44 and having an upper edge 52 and a lower edge 54, and a V~fold section 56 intermediate the first subsection 44 and the second subsection 50. The V-fold section 56 includes a first V-fold member 58 attached to the lower edge 48 of the first subsection 44 and a second V-fold member 60 attached to the lower ed~e 54 of the second subsection 50. The top edge of the first V fold member 58 is connected to the top edge of the second V-fold member 60 along a common point such as flrst fold line 62. The length of the member 58, 60 may be identical or different. For example, the length of each of the V-fold members 58, 60 in the present embodiment is 2x. The intermediate structure 40 is capable of being collapsed into a relatively flat, multiple-plied structure, so that a single weld made on the first subsection may produce weld lines on both the first and second subsection 44, 50.
The container 10 is preferably comprised of a two-ply lamlnated material, such as a coextruded solid sheet of low density/high density polyethylene or a laminated multilayered sheet. Typically this material will have an inner ply which is plastic, and hence heat-sealable, and an outer ply which is not. In the steps of manufacturing the container 10, it is sometimes necessary to attach one surface of the intermediate structure 40 to another.
- This attachment may be accomplished with adhesives, or may alternatively be accomplished by other means of attaching one surface to another, such as standard cold or heat-sealing. To the extent that heat sealing is .
~UE~I~T S~I~E1 5 1 / 0 ~ ~ ~ 2 IPFA/US ~ 10~/1991 used, it ~ay be necessary to expose the heat-sealable inner ply by removing the outer-ply at a point of attachment. For example, weld-spots 64, 120 and 130 are shown in Flg. 3 and 4 at positions which will eventually be attachment points for forming the container 10. Also, the term weld used herein is defined as any means of attaching one surface to another.
As shown in Figs. 5 and 6, once the V-fold section 56 is formed, a first side edge weld line 66 is placed made connecting the juxtaposed upper edges 46, 52 and lower edges 48, 54. The line 66 should be relatively thick, for example about one-half inch thick, so that it may be later cut in half while maintaining its seal. The result of the first side edge weld line 66 will be the attachment of the upper portion 68 of the first subsection 44 to the upper portion 70 of the second ` subsection 50, the lower portion 72 of the first subsection 4~ to the first V-fold member 58 and the lower portion 74 of the second subsection 50 to the second V-fold member 60. Similarly, a second side edge weld line 76 is made at a distance away from the first side edge weld line 66. The result of the second weld line 76 will also be and connecting upper edges 48, 54 and lower edges 48, 52 the attachment of the upper portion 68 of the first subsection 44 to the upper portion 70 of the second subsection 50, the lower portion 72 of the first subsection 44 to the first V-fold member 58 and the lower portion 74 of the second subsection 50 to the second V-fold member 60. The first and second side edge welds 66,76 will thereby form an upper container portion 78, a first leg portion 80 and a second leg portion 82, as shown in Fig. 6.
As shown in Figs. 7 and 8, in the present 3S embodiment, a first oblique weld line 84 is placed interconnecting the common point 86 of intersection of S9~ TUTE S~ T
PCT/US 9 ~02992 ~f'~/U~ 1.99 the first side edge weld line 66 and the top edges of the V-fold members 58, 60, when the subsections 44, 50 are in underlying position, to the lower edge 48 of the first subsection 44. When the V-fold members 58, 60 are attached along the first fold line 62, the common point 86 will also be the intersection or the first fold line 62 and weld line 66. The first oblique weld line 84 results in the attachment of the lower portion 72 of the first subsection 44 to the first V-fold member 58 along line 84a and the lower portion 74 of the second subsection 50 to the second -J-fold member 60 along line 84b. Similarly, a second oblique weld line 88 is placed interconnecting the point 90 of intersection of the second side edge weld line 76 ~nd top edges and tha lower edge 48. The second oblique weld line 88 results in the attachment of the lower portion 72 o~ the first subsection 44 to the first V-fold member 58 along~line 88a and the lower portion 74 of the second subsection 50 to the second V-fold member 50 along line 88b. Both the first and second oblique wel~l lines 86,88 should be at approximately 45 angles. Add-tionally, the entire area ; between the first oblique weld lines 84a,b and corners 92, 94, as well as between the second oblique weld lines 88a,b and corners 96, 98, ma~ be welded together.
In an alternate embodim~nt of the present invention, as shown in Fig. 28, the V-fold section 56 may include a middle member 63 attached at a first end 65 to the first V-fold member 58 and at a secord end 67 to the second V-fold member 60. This will eliminate the need for the first fold line 62, which may be undesirable when the : container material 34 is aluminum or some a~her material which may be subject to flex-c~acking upon ~olding. In this embodiment, the first obl~que weld line 84 is begun at the common point 69, whic`.l corresponds to the intersection of the first side edge weld line 66 and the top edges of the V-fold members 58, 60 plus one-half the - ~ STl rUTF ~HI~
q l l o 2 9 9 2 IPEA/U~ 2 7 ~`10~/199i width of the mlddle member 63. For example, as seen in Fig. 27, if the width of the middle member 63 is 2X, as measured between first end 65 and second end 67, the common point 69 will be located a distance of lX above the intersection of the V-fold members 58, 60 and the first side edge weld line 66. The first oblique weld line 84 will extend between the co~mon point 69 and the lower edge 48 of the first subsection 44 at an approximately 45 angle. Similarly, the second oblique weld line 88 is provided between a common point 69, as defined above, along second side edge weld line 88 and the lower edge 48 of the first subsection 44. The remaining steps in the formation of the container 10 may be as set forth above.
As shown in Fig. 9, a leg weld line 100 may be made between the first side edge weld line 66 and the second side edge weld line 76 at approximately the middle line 102 of one of the legs 80, 82, resulting in weld line lOOa on the first leg 80 and line lOOb on the second lag. It is preferred that the line 100 be made slightly (i.e. one-sixteenth of an inch) above the midline 102 of the legs 80, 82. As shown in Fig. 10, the first leg 80 is folded along the first weld lin lOOa so that the lower edge 48 of the first subsection 44 is adjacent the first fold line 62. Similarly, as shown in Fig. 11, the second l`ength 82 is folded along the leg weld line lOOb so that the lower edge 54 of the second subsection 50 is adjacent the first fold line 62 and the lower edge 48 of the first subsection 44. As shown in Fig. 12, the legs 80, 82 may be maintained in folded position by adhesives or by spot-welding, such as at weld-spots 6~, thereby forming bottom wall 20. In the presant embodiment, the width of each leg 80, 82 will be lX. However, as shown in Figs. 13 and 14, the length of one leg, for example leg 82, may be greater than the length of the remaining leg 80. In such a case, the longer leg 82 is folded a ~B5TI~U~ SYE~T
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~IUS 9l/02992 IPEA/U~ ~7 Nl?'! l9~i plurality of times, such as illustrated in Fig. 14.
Also, the legs 80, 82 may be shortened so as not to be adjacent the first fold line 62, but rather to be mer~ly adjacent leg weld lines lOOa,b. For example the portion of the legs 80, 82 below the leg weld lines lOOa,b may be eliminated to provide a container 10 having a single-ply bottom 20. Also as shown in Fig. 15, the corners 104, 106, 108, 110 of the folded legs 80, 82 may be removed, such as by die cutting, for aesthetic reasons. It should be noted that even at this stage of manufacturing the structure 40 can be collapsed flat so that the first subsection 44 may be overlying the second su~section 50.
The structure 40 may be divided into individual containers 10 by cutting along the approximate midlines the firs~ side edge weld line 66 and the second side edge weld line 76. It is advisable that the first and second side edge weld lines 66, 76 be of sufficient width to provide an adequate seal between the first and second subsections 44, 50 after cutting. This will allow the formation of two sealed container 10 edges by a single cut.
Referring to Figs. 12, 16 and 17, the interior space of the container 10 is provided by separating the first subgection 44 from the second subsection 50. As can be seen in Fig. 17, when the subsections 44, 50 are fully separated, the lower portion of the containar 10 acquires a squared-off shape, and the bottom wall 20 will be seamless. The container 10 may be opened by a forming turret 142, such as shown in Fig. 2.
Referring to Fig. 18, upon separation of the first subsection 44 and the second subsection 50, a first endmost portion 112 of the folded legs 80, 82 pivots upwardly along the lateral axis of the bottom wall 20 S~SllTUr~ S~t. ET
us 91!02992 15 IF'E~/~JS 21 l~OV iq~l towards the first side e~ge weld line 66, preferably along the point 116 where the leg weld line 100 intersects the ~irst o~lique weld lines 84a,b.
Similarly, a second endmost portion 114 of the legs 80, 5 82 pivots upwardly towards the second side edge weld line 76, preferably along the point 118 where the leg ~eld line lOo intersects the second oblique weld lines 88a,b.
Weld-spots 120 may be provided for attaching the endmost portions 112, 114 to the side edges of the container 10, such as to the first subsection 44 and the second subsection 50. Also, as shown in Fig. 19, foldlines 122, 124 may be provided in the first subsection 44 between points 116, 118 and the upper edge 46, and foldlines 126, 128 may be provided in the second subsection 50 between lS points 116, 118 and the upper edge 52, for providing the container 10 with clearly defined squared-off side edges 16, 18, which will be like side walls. Howe~er, in some embodiments the side walls may not be clearly defined.
The first side edge weld line 66 and the second side ed~e weld line 76 may be attached to the first subsection 44, such as by pinching or by weld-spots 130, to ~urther reinforce the sidewalls 16, 18. Of course, the side edge weld lines 66, 76 may alternatively be folded in an opposite direction and attached to the second subsection S0. Also, as shown in Fig. 27, the frontwall 12 and rearwa~l 14 may be attached to the side edges 16, 18 along side edge foldlines 122, 124, 126, 128 to further stabilize the container 10.
Referring to Fig. ~0, it may be desirable to remove one of the plys from each of the endmost port`ions 112, 114, such as for aesthetic reasons in instances where less reinforcement is needed at the container side walls 16, 18.
StJ8STlTUTE SHEET
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. -~C~ S 91/02992 pF~/l)S ~ ~ NQ\t ~91 . 16 Once the sidewalls 16, 18 are for~ed, the container 10 may be filled and sealed. This procedure may be performed on a standard filling turret 132, such as shown in Fig. 2. As shown in Fig. 21, 22 and 23, a standard filling nozzle 13~ may be used to place products into the container 10. 8ecause of its unique construction, the container 10 may be self-standing during the filling process. Once the container 10 is full, the nozzle 134 may be removed and the upper edge 46 of the first subsection 44 may be welded or otherwise sealed to the upper edge 52 of the second subsection 50, such as by a top weld line 138. The sealing of the container 10 top may be performed with the container 10 in self-standing upright position on a standard sealing turret 140. As shown in Fig. 24, the top weld line 138 may be made thick and with one corner 136 squared-off to provide an easy pouring spout for the container 10. A
handle opening may be provided in it.
It is also possible to manufacture the container 10 of the present invention using multiple webs. For example, as shown in Figs. 25 and 26, the first subsection 44, the second su~section 50 and the V-fold section 56 may each be provided from separate webs 144, 146, 148 and welded or otherwise attached to form the intermediate structure 40. In such a case, the lower edge 48 of the first subsection 44 will be attached to a first edge 150 of the V-fold section 56 and the lower edge 52 of the second subsection 50 will be attached to a second edge 152 of the V-fold section 56. Once the intermediate structure 40 is formed, the remaining steps of the manufacturing process may be as set forth above or the equivalent~
3S While this invention has bPen described in detail with particular reference to the preferred SU8STITU~E S~I~ET
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I~T/US 5 1 /0 29 9 2 ~P~
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embodiment thereof, it will be understood that variations and modifications can be effected within the spirit and scope of the invention as previously described and as defined in the claims. For example, the sequence of the steps set forth herein may be altered, and welds may be accomplished by lines of adhesive or other attachment means. As an alternative to the method of mass producing containers 10 set Eorth above, each individual container 10 may, using the method of the present invention, be produced from a single sheet of material rather than from a continuous web. Therefore, while the above description contains many specificities, these should not be construed as limitations on the scope of the invention, but rather as an amplification of one preferred embodiment thereof.
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TECHNICAL FIELD
The present invention relates to the packaging industry, and more particularly to a flexible container, as well as a method for making same.
Traditional means for packaging products, particularly liquids, have included metal cans and glass and plastic bottles. Cans and bottles have the advantage of being hermetically sealable, are of sturdy construction, and may be stored in a self-supported upright position.
However, a number of problems exist in the use of cans and bottles. For example, their production methods are complicated and expensive. The raw materials used in producing such containers are also expensive.
Furthermore, ~raditional cans and bottles present environmental problems in that, even in their empty state, they occupy a relatively large amount of space, whether it bP at a landfill or in a kitchen garbage can. Finally, cans and bottl~s are rather heavy and therefore are inconvenient and expensive to transport.
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` 30 BACXGROUND ART
; In an attempt to overcome the reliance upon cans and bottles, packagers have recently be~un to use flexible, ~usible sheet material in forming disposable 35 containers, such as found in U.S. Patent No. 3,380,646 tu Doyen et al. and U.S. Patent No. 4,287,247 to Reil et al.
Such containers are problematic, however, in that they have interior crevices in their bottoms and corners which may act as bacterial traps. Furthermore, they must be , . , .
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WO~I/l7089 PCT/VS91/02992 produced from relatively thick, and therefore expensive, retort material to be capable of standing upright without support. Even if manufactured with such thick material, the packages are typically unstable and must be supported on the shelves of a store by a box or other means. Once purchased and opened, consumers have to empty the contents of the containers into pitchers or other storage means.
Also, the flexible containers used to date usually have at least one weld on their interior bottom wall, which is the location of the most pressure from liquid or other packaged products. As a result, there is a structural weakness at the bottom portions of most currently used containers.
The methods employed in producing the currently used flexible containers are complicated in that they require a relatively large number of welding steps, many of which ~ust be performed while the container ~aterial is in a vertical orientation. As a result, the apparatus for forming the container i9 by necessity complicated and expensive.
There exists a need, therefore, for a container which is hermetically sealable, lightweight, and which is flexible so as not to occupy a large volume of space when emptied.
There exists a further need for a flexible container which has no interior crevices, which can be produced from relatively thin material, and which is sturdy, particularly alon~ its bottom.
There also exists a need for a method of producing such a container which provides effective seals yet i~ simple, ~uic~, and inexpensive.
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WO~1/17089 2 0 8 2 ~ ~ ~ PCT~US91/02992 DISCLOSURE OF THE INVENTION
The present invention relates to a container having a front wall, a rear wall, a pair of sidewalls, and a reinforced bottom wall. The bottom wall is preferably comprised of a plurality of folded leg members extending from the lower edges of the front and rear walls. The lower portions of the sidewalls are reinforced with the folded-up endmost portions of the folded leg members. The top edges of the container may be welded closed to form a hermetically sealed package.
A method of making a container from flexible material comprises placing a V-fold, or a modified flat V-fold, in a sheet of flexible material to form anintermediate structure having a first su~section, a second subsection underlying the first subsection and a V-fold section intermediate the first and lower edge of the second subsections having a first ~-fold me~ber attached to the lower edge of the first subsection and a second V-fold mem~er attached to the lower edge of the second subsection. The first and second V-fold members are preferably connected along a longitudinal ~old line.
A first side edge weld line is made connecting the upper edges with the lower edges to weld the first subsection to both the second subsection and the first V-fold member and at the same time to weld the second subsection to the second V-fold member. A second side edge weld line is made a distance from the firs~ side edge weld line connecting the upper edges with the ]ower edges-to weld the first subsection to both the second subsection and the first V-fold membar and at the same time to weld the second subsection to the second V-fold member. The side sdge welds result in the formation of an upper container portion and first and second leg portions, which are connected along the first fold line.
W091/17089 2 ~ 8 % 0 7 ~ PCTtUS9ltO2992 ~^
, A first oblique weld line is made interconnecting the point of intersection of the first weld line and the first fold line to the lower edge of the first subsection. A second oblique weld line is made interconnecting the point of intersection of the second side edge weld line and the longitudinal fold line to the lower edge of the first subsection. A leg weld line maybe made between the first and second side edge weld lines at approximately the middle point of the first leg to weld the first subsection to both the first V-fold member and the second subsection the second V-fold member.
The bottom wall is formed by folding the first leg inwardly towards the first fold line so that the lower edge of the first subsection is adjacent the first fold line and folding the second leg inwardly towards the first fold line so that the lower edge of the second subsection is adjacent the longitudinal fold line. Upon separating the first subsection from the second subsection, an interior space is formed between the first and second side edge weld lines and the endmost portions of the legs pivot along the lateral axis of the bottom wall upwardly towards the first and second side edge weld lines. one of the endmost portions is attached to the first side edge weld line and the remaining endmost portion is attached to the second side edge weld line to form reinforced container side edges.
The container of the present invention has a number of significant attributes. For example, the bottom and lower side walls of the container, which are subjected to the most pressure by the contents of the container, are reinforced by multiple plys of container material, yet the container bottom is free from any debilitating internal weld. The present container may also have deeper side walls than those previously known.
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~ W~91/1708~ 2 ~ 8 2 0 7 2 PCT/US91/02992 Furthermore, the container can be produced from relatively thin material and therefore is lighter and less expensive to manufacture and transport than containers requiring thick material. This is especially useful when the container is made from flexible material, which is expensive. The thinness of the container walls also encourages the use of biodegradable materials, which have traditionally been thin. Still, the container i5 capable of standing vertically on its own, both during the filling process and when on a grocery or refrigerator shelf without the need of an outer box or other supporting means. The present invention therefore eliminates the need for transferring the contents into a pitcher or other containment means after opening. The fact that there are no crevices in the interior of the container minimi~es the worry about bacteria-traps when storing the opened container between uses. This also ena~les the container to be used as a mixing bowl, such as for foods or other items to which water is added.
Also, once the product is used and the container i~ empty, the walls of the container will collapse back to its flat state. This will resu:Lt in the waste container occupying far less volume in the family trash, as well as in a land~ill, than the commonly used can ~r plastic bottle.
The method of producing the present in~ention is also advantageous. For example, the entire container may, 3~ in one embodiment, be producPd using a single web of material. Also, the number of welds needed to be made are minimized and the entire production process prior to filling may, if desired, be performed while the web ~ material is traveling in a horizontal plane.
overall, the container of ~he present invention ~ .
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possesses many of the attributes of a can or bottle, but at the same time eliminates many of the negatives. Also, the method of manufacturing of the present invention is efficient and ine~pensive.
Figure 1 is a perspective view of one embodiment of the container of the present invention.
Figure 2 is a schematic of an apparatus for manufacturing the container of the present invention.
Figure 3 is a perspective view of one embodiment of the intermediate structure of the container of the present invention.
Figure 4 is a top view of one embodiment of the intermediate structure of the container of the present invention.
Figure 5 is a top view of one embodiment of the intermediate structure of the container of the present invention illustrating the preferred position of the side edga weld lines.
Figure 6 is a perspective view of the intermediate structure of Figure 5 illustrating separated legs.
`~ Figure 7 is a top view of the intermediate structure of Figure 4 illustrating the preferred position o~ the oblique weld lines.
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, W~ ~31/1~0~9 2 0 8 2 0 7 2 P~T/US91/02992 Figure 8 is a perspective view of theintermediate structure of Figure 7 illustrating separated legs.
Figure 9 is a top view of the intermediate structure illustrating the preferred position of the leg weld line.
Figure 10 is a perspective view of the intermediate structure having one leg folded.
Figure 11 is a perspective view of the intermediate structure having both legs folded.
Figure 12 is a cross-sectional view of the lower portion of the container of the present invention in its collapsecl state.
Figure 13 is a top view of an intermediate structure wherein one leg is longer than the other.
Figure 14 is a cross-sectional view of the lower portion of the intermediate structure having legs of different sizes in folded position.
Figure 15 is a perspective view of one embodiment of the intermediate structure having the corner portions of the legs removed.
Figure 16 is a cross-sectional view of the container of th& present invention in partially opened condition.
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Figure 17 is a cross-sectional view of the container of the present invention in fully opened condition.
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W~l/17~89 PCT/US91/02992 \~
Figure 18 is a persp,ectivP view of one embodiment of the container of the present invention having partially separated subsections.
Figure 19 is a perspective view of one embodiment of the container of the present invention having fully separated subsections.
Figure 20 is a perspective view of the intermediate structure having both legs folded and having one ply of the endmost portions of the leg removed.
Figure 21 is a perspective view of one embodiment of the container of the present invention having its sidewalls folded inwardly.
Figure 22 is a perspective view of one embodiment of the container of the present invention having a filling nozzle insertecl between its subsections.
Figure 23 is a perspective view of one embodiment of the container of t.he present invention having sealed top edges.
Figure 24 is a perspective view of one embodiment of the container of the present invention ha~ing thicXly sealed top edges.
Figure 25 is a schematic of an apparatus for manufacturing the container of the present invention from multiple w~bs of mater1al.
Figure 26 is a perspective view of an intermediate structure manufactured using multiple webs of mater~al.
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9 1 / 0 2 ~J 9 2 - g ~P~ S 2 7 ~l nv ~9 Figure 27 is a perspective view of one embodiment of the container of the present invention having reinforced side edges.
s Figure 28 is a cross~sectional view of an intermediate structure having a middle member in its V-~old section.
Fig. 1 illustrates a flexible container 10 of the present invention. The container 10 has a front wall 12, a rear wall 14, a pair of sidewalls 16, 18 and a reinforced bottom wall 20. As illustrated in Fig. 12, the bottom wall 20 is preferably comprised of a pair of folded leg members 80, 82 extending from the lower edges of the front and rear walls 12, 14. The lower portions of the sidewalls 16, 18 are re:Lnforced with endmost portions 112,114, which are integral with the folded leg members 80, 82. The top edge ;28 of the container 10 may be welded closed to form a hermetically sealed package.
Leg weld line 100a is located at the intersection of the front wall 12 and the bottom wall 20, and leg weld line 100b is located at the intersection of the rear wall 14 and the bottom wall 20, both for further maintaining the contain~r 10 in upright position. The weld lines 100a,b also reinforce the intersection of the front wall 12 and the bottom wall 20 and prevent flex-cracking of container màterial, particularly aluminum foil type material.
Fig. 2 illustrates an apparatl~s 30 which may be used to manufacture the container 10 of the present invention. A single web 32 of container material 34 is delivered from a roller 36 to a standard V-plow 38. The V-plow 38 creates a V-fold in the approximate center of the material 34, such as shown in Fig. 3, and the ` .
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pr,~/lJS 2 ~1 ~10~/ ~991 material 34 is passed through the remaininy processes along a conveyor belt 42, preferably in a horizontal orientation.
As shown in Fig. 3, an lntermediate structure 40 has a first subsection 44 having an upper edge ~6 and a lower edge 48, a second subsection 50 underlying the first subsection 44 and having an upper edge 52 and a lower edge 54, and a V~fold section 56 intermediate the first subsection 44 and the second subsection 50. The V-fold section 56 includes a first V-fold member 58 attached to the lower edge 48 of the first subsection 44 and a second V-fold member 60 attached to the lower ed~e 54 of the second subsection 50. The top edge of the first V fold member 58 is connected to the top edge of the second V-fold member 60 along a common point such as flrst fold line 62. The length of the member 58, 60 may be identical or different. For example, the length of each of the V-fold members 58, 60 in the present embodiment is 2x. The intermediate structure 40 is capable of being collapsed into a relatively flat, multiple-plied structure, so that a single weld made on the first subsection may produce weld lines on both the first and second subsection 44, 50.
The container 10 is preferably comprised of a two-ply lamlnated material, such as a coextruded solid sheet of low density/high density polyethylene or a laminated multilayered sheet. Typically this material will have an inner ply which is plastic, and hence heat-sealable, and an outer ply which is not. In the steps of manufacturing the container 10, it is sometimes necessary to attach one surface of the intermediate structure 40 to another.
- This attachment may be accomplished with adhesives, or may alternatively be accomplished by other means of attaching one surface to another, such as standard cold or heat-sealing. To the extent that heat sealing is .
~UE~I~T S~I~E1 5 1 / 0 ~ ~ ~ 2 IPFA/US ~ 10~/1991 used, it ~ay be necessary to expose the heat-sealable inner ply by removing the outer-ply at a point of attachment. For example, weld-spots 64, 120 and 130 are shown in Flg. 3 and 4 at positions which will eventually be attachment points for forming the container 10. Also, the term weld used herein is defined as any means of attaching one surface to another.
As shown in Figs. 5 and 6, once the V-fold section 56 is formed, a first side edge weld line 66 is placed made connecting the juxtaposed upper edges 46, 52 and lower edges 48, 54. The line 66 should be relatively thick, for example about one-half inch thick, so that it may be later cut in half while maintaining its seal. The result of the first side edge weld line 66 will be the attachment of the upper portion 68 of the first subsection 44 to the upper portion 70 of the second ` subsection 50, the lower portion 72 of the first subsection 4~ to the first V-fold member 58 and the lower portion 74 of the second subsection 50 to the second V-fold member 60. Similarly, a second side edge weld line 76 is made at a distance away from the first side edge weld line 66. The result of the second weld line 76 will also be and connecting upper edges 48, 54 and lower edges 48, 52 the attachment of the upper portion 68 of the first subsection 44 to the upper portion 70 of the second subsection 50, the lower portion 72 of the first subsection 44 to the first V-fold member 58 and the lower portion 74 of the second subsection 50 to the second V-fold member 60. The first and second side edge welds 66,76 will thereby form an upper container portion 78, a first leg portion 80 and a second leg portion 82, as shown in Fig. 6.
As shown in Figs. 7 and 8, in the present 3S embodiment, a first oblique weld line 84 is placed interconnecting the common point 86 of intersection of S9~ TUTE S~ T
PCT/US 9 ~02992 ~f'~/U~ 1.99 the first side edge weld line 66 and the top edges of the V-fold members 58, 60, when the subsections 44, 50 are in underlying position, to the lower edge 48 of the first subsection 44. When the V-fold members 58, 60 are attached along the first fold line 62, the common point 86 will also be the intersection or the first fold line 62 and weld line 66. The first oblique weld line 84 results in the attachment of the lower portion 72 of the first subsection 44 to the first V-fold member 58 along line 84a and the lower portion 74 of the second subsection 50 to the second -J-fold member 60 along line 84b. Similarly, a second oblique weld line 88 is placed interconnecting the point 90 of intersection of the second side edge weld line 76 ~nd top edges and tha lower edge 48. The second oblique weld line 88 results in the attachment of the lower portion 72 o~ the first subsection 44 to the first V-fold member 58 along~line 88a and the lower portion 74 of the second subsection 50 to the second V-fold member 50 along line 88b. Both the first and second oblique wel~l lines 86,88 should be at approximately 45 angles. Add-tionally, the entire area ; between the first oblique weld lines 84a,b and corners 92, 94, as well as between the second oblique weld lines 88a,b and corners 96, 98, ma~ be welded together.
In an alternate embodim~nt of the present invention, as shown in Fig. 28, the V-fold section 56 may include a middle member 63 attached at a first end 65 to the first V-fold member 58 and at a secord end 67 to the second V-fold member 60. This will eliminate the need for the first fold line 62, which may be undesirable when the : container material 34 is aluminum or some a~her material which may be subject to flex-c~acking upon ~olding. In this embodiment, the first obl~que weld line 84 is begun at the common point 69, whic`.l corresponds to the intersection of the first side edge weld line 66 and the top edges of the V-fold members 58, 60 plus one-half the - ~ STl rUTF ~HI~
q l l o 2 9 9 2 IPEA/U~ 2 7 ~`10~/199i width of the mlddle member 63. For example, as seen in Fig. 27, if the width of the middle member 63 is 2X, as measured between first end 65 and second end 67, the common point 69 will be located a distance of lX above the intersection of the V-fold members 58, 60 and the first side edge weld line 66. The first oblique weld line 84 will extend between the co~mon point 69 and the lower edge 48 of the first subsection 44 at an approximately 45 angle. Similarly, the second oblique weld line 88 is provided between a common point 69, as defined above, along second side edge weld line 88 and the lower edge 48 of the first subsection 44. The remaining steps in the formation of the container 10 may be as set forth above.
As shown in Fig. 9, a leg weld line 100 may be made between the first side edge weld line 66 and the second side edge weld line 76 at approximately the middle line 102 of one of the legs 80, 82, resulting in weld line lOOa on the first leg 80 and line lOOb on the second lag. It is preferred that the line 100 be made slightly (i.e. one-sixteenth of an inch) above the midline 102 of the legs 80, 82. As shown in Fig. 10, the first leg 80 is folded along the first weld lin lOOa so that the lower edge 48 of the first subsection 44 is adjacent the first fold line 62. Similarly, as shown in Fig. 11, the second l`ength 82 is folded along the leg weld line lOOb so that the lower edge 54 of the second subsection 50 is adjacent the first fold line 62 and the lower edge 48 of the first subsection 44. As shown in Fig. 12, the legs 80, 82 may be maintained in folded position by adhesives or by spot-welding, such as at weld-spots 6~, thereby forming bottom wall 20. In the presant embodiment, the width of each leg 80, 82 will be lX. However, as shown in Figs. 13 and 14, the length of one leg, for example leg 82, may be greater than the length of the remaining leg 80. In such a case, the longer leg 82 is folded a ~B5TI~U~ SYE~T
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~IUS 9l/02992 IPEA/U~ ~7 Nl?'! l9~i plurality of times, such as illustrated in Fig. 14.
Also, the legs 80, 82 may be shortened so as not to be adjacent the first fold line 62, but rather to be mer~ly adjacent leg weld lines lOOa,b. For example the portion of the legs 80, 82 below the leg weld lines lOOa,b may be eliminated to provide a container 10 having a single-ply bottom 20. Also as shown in Fig. 15, the corners 104, 106, 108, 110 of the folded legs 80, 82 may be removed, such as by die cutting, for aesthetic reasons. It should be noted that even at this stage of manufacturing the structure 40 can be collapsed flat so that the first subsection 44 may be overlying the second su~section 50.
The structure 40 may be divided into individual containers 10 by cutting along the approximate midlines the firs~ side edge weld line 66 and the second side edge weld line 76. It is advisable that the first and second side edge weld lines 66, 76 be of sufficient width to provide an adequate seal between the first and second subsections 44, 50 after cutting. This will allow the formation of two sealed container 10 edges by a single cut.
Referring to Figs. 12, 16 and 17, the interior space of the container 10 is provided by separating the first subgection 44 from the second subsection 50. As can be seen in Fig. 17, when the subsections 44, 50 are fully separated, the lower portion of the containar 10 acquires a squared-off shape, and the bottom wall 20 will be seamless. The container 10 may be opened by a forming turret 142, such as shown in Fig. 2.
Referring to Fig. 18, upon separation of the first subsection 44 and the second subsection 50, a first endmost portion 112 of the folded legs 80, 82 pivots upwardly along the lateral axis of the bottom wall 20 S~SllTUr~ S~t. ET
us 91!02992 15 IF'E~/~JS 21 l~OV iq~l towards the first side e~ge weld line 66, preferably along the point 116 where the leg weld line 100 intersects the ~irst o~lique weld lines 84a,b.
Similarly, a second endmost portion 114 of the legs 80, 5 82 pivots upwardly towards the second side edge weld line 76, preferably along the point 118 where the leg ~eld line lOo intersects the second oblique weld lines 88a,b.
Weld-spots 120 may be provided for attaching the endmost portions 112, 114 to the side edges of the container 10, such as to the first subsection 44 and the second subsection 50. Also, as shown in Fig. 19, foldlines 122, 124 may be provided in the first subsection 44 between points 116, 118 and the upper edge 46, and foldlines 126, 128 may be provided in the second subsection 50 between lS points 116, 118 and the upper edge 52, for providing the container 10 with clearly defined squared-off side edges 16, 18, which will be like side walls. Howe~er, in some embodiments the side walls may not be clearly defined.
The first side edge weld line 66 and the second side ed~e weld line 76 may be attached to the first subsection 44, such as by pinching or by weld-spots 130, to ~urther reinforce the sidewalls 16, 18. Of course, the side edge weld lines 66, 76 may alternatively be folded in an opposite direction and attached to the second subsection S0. Also, as shown in Fig. 27, the frontwall 12 and rearwa~l 14 may be attached to the side edges 16, 18 along side edge foldlines 122, 124, 126, 128 to further stabilize the container 10.
Referring to Fig. ~0, it may be desirable to remove one of the plys from each of the endmost port`ions 112, 114, such as for aesthetic reasons in instances where less reinforcement is needed at the container side walls 16, 18.
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. -~C~ S 91/02992 pF~/l)S ~ ~ NQ\t ~91 . 16 Once the sidewalls 16, 18 are for~ed, the container 10 may be filled and sealed. This procedure may be performed on a standard filling turret 132, such as shown in Fig. 2. As shown in Fig. 21, 22 and 23, a standard filling nozzle 13~ may be used to place products into the container 10. 8ecause of its unique construction, the container 10 may be self-standing during the filling process. Once the container 10 is full, the nozzle 134 may be removed and the upper edge 46 of the first subsection 44 may be welded or otherwise sealed to the upper edge 52 of the second subsection 50, such as by a top weld line 138. The sealing of the container 10 top may be performed with the container 10 in self-standing upright position on a standard sealing turret 140. As shown in Fig. 24, the top weld line 138 may be made thick and with one corner 136 squared-off to provide an easy pouring spout for the container 10. A
handle opening may be provided in it.
It is also possible to manufacture the container 10 of the present invention using multiple webs. For example, as shown in Figs. 25 and 26, the first subsection 44, the second su~section 50 and the V-fold section 56 may each be provided from separate webs 144, 146, 148 and welded or otherwise attached to form the intermediate structure 40. In such a case, the lower edge 48 of the first subsection 44 will be attached to a first edge 150 of the V-fold section 56 and the lower edge 52 of the second subsection 50 will be attached to a second edge 152 of the V-fold section 56. Once the intermediate structure 40 is formed, the remaining steps of the manufacturing process may be as set forth above or the equivalent~
3S While this invention has bPen described in detail with particular reference to the preferred SU8STITU~E S~I~ET
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embodiment thereof, it will be understood that variations and modifications can be effected within the spirit and scope of the invention as previously described and as defined in the claims. For example, the sequence of the steps set forth herein may be altered, and welds may be accomplished by lines of adhesive or other attachment means. As an alternative to the method of mass producing containers 10 set Eorth above, each individual container 10 may, using the method of the present invention, be produced from a single sheet of material rather than from a continuous web. Therefore, while the above description contains many specificities, these should not be construed as limitations on the scope of the invention, but rather as an amplification of one preferred embodiment thereof.
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Claims
1. (cancelled) 2. (cancelled) 3. (cancelled) 4. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first: V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second lags a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and attaching the endmost portions of the legs to the side edges.
5. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first Y-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second Y-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and placing a leg weld line between the first and second side edge weld lines to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member.
6. The method of claim 5, and further comprising the step of removing the portions of the legs extending from the leg weld line to the lower edges of the first and second subsections.
7. The method of claim 5, and further comprising the step of folding the first and second legs along the leg weld line inwardly towards the connection point after placing the first and second oblique weld lines.
8. (cancelled) 9. (cancelled) 10. (cancelled) 11. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection, a second V-fold member attached to the lower edge of the second subsection, and a middle member attached at a first end to the top edge of the first V-fold member and at a second end to the top edge of the second V-fold member, the top edge of the first Y-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
12. The method of claim 11, wherein the first oblique weld line interconnects the point which corresponds to the intersection of the first side edge weld line and the top edge of the first V-fold member plus one-half the distance between the first and second ends of the middle member with the lower edge of the first subsection and the second oblique weld line interconnects the point which corresponds to the intersection of the second side edge weld line and the top edge of the second V-fold member plus one-half distance between the first and second ends of the middle member with the lower edge of the first subsection.
13. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs with one leg being longer than the other;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby farming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the longer leg a plurality of times along a fold line extending substantially parallel to the lower edge to provide a bottom wall reinforced by multiple folds and folding the first and second legs inwardly towards the connection point; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
14. (cancelled) 15. (cancelled) 16. (cancelled) 17. (cancelled) 18. (cancelled) l9. (cancelled) 20. The method of claim 5, wherein the legs are approximately the same side and wherein the leg fold line is provided slightly above the mid-points of the legs.
21. (cancelled) 22. (cancelled) 23. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and providing a thick top seal and providing a handle opening in the seal.
24. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and pinching in the fold lines to create reinforced side edges.
25. (cancelled) 26. A method of making a container from flexible material comprising:
placing a V-fold in a sheet of flexible material to form an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the first and second V-fold members connected along a first fold line;
placing on the intermediate structure a first side edge weld line connecting the upper edges with said lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with said lower edges, the second side edge being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second leg which are connected along the first fold line;
forming a first oblique weld line interconnecting the point of intersection of the first side edge weld line and the first fold line with the lower edge of the first subsection to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member, thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
forming a second oblique weld line interconnecting the point of intersection of the second side edge weld line and the first fold line with the lower edge of the first subsection to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member, thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first leg inwardly towards the first fold line;
folding the second leg inwardly towards the first fold line;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a frontwall, a rearwall and a pair of opposing side edges interconnecting the frontwall and the rearwall; and attaching the endmost portions to the side edges.
27. The method of claim 26, further comprising the step of placing a top seal between the first and second side edge weld lines top seal said container.
28. (cancelled) 29. The method of claim 26, wherein said first V-fold member and said second V-fold member are of different lengths and one of said legs; is folded a plurality of times.
30. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
placing another weld line between the first and second side edge weld lines at approximately the middle point of the first leg to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member, and folding said legs along said another weld line;
folding the first and second legs inwardly towards the connection point; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
31. (cancelled) 32. A method of making a container from material comprising the steps of:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a folded section intermediate the first and second subsections having a first fold attached to the lower edge of the first subsection, a second fold attached to the lower edge of the second subsection and a middle fold extending between and joined to the first and second folds along fold lines, welding the side edges of the intermediate structure together along first and second side edge weld lines thereby welding the first and second subsections together to form first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first fold and the second subsection to the second fold thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first fold and the second subsection to the second fold thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines so as to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
33. The method of claim 32 wherein forming the material into the intermediate structure the middle fold is formed extending at oblique angles from the first and second folds.
34. The method of claim 32 further comprising the step of folding the first and second legs inwardly after placing the first and second oblique weld lines.
35. The method of claim 34 further comprising the step of folding the first and second legs inwardly after placing the first and second oblique weld lines.
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first: V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second lags a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and attaching the endmost portions of the legs to the side edges.
5. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first Y-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second Y-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and placing a leg weld line between the first and second side edge weld lines to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member.
6. The method of claim 5, and further comprising the step of removing the portions of the legs extending from the leg weld line to the lower edges of the first and second subsections.
7. The method of claim 5, and further comprising the step of folding the first and second legs along the leg weld line inwardly towards the connection point after placing the first and second oblique weld lines.
8. (cancelled) 9. (cancelled) 10. (cancelled) 11. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection, a second V-fold member attached to the lower edge of the second subsection, and a middle member attached at a first end to the top edge of the first V-fold member and at a second end to the top edge of the second V-fold member, the top edge of the first Y-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
12. The method of claim 11, wherein the first oblique weld line interconnects the point which corresponds to the intersection of the first side edge weld line and the top edge of the first V-fold member plus one-half the distance between the first and second ends of the middle member with the lower edge of the first subsection and the second oblique weld line interconnects the point which corresponds to the intersection of the second side edge weld line and the top edge of the second V-fold member plus one-half distance between the first and second ends of the middle member with the lower edge of the first subsection.
13. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs with one leg being longer than the other;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby farming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the longer leg a plurality of times along a fold line extending substantially parallel to the lower edge to provide a bottom wall reinforced by multiple folds and folding the first and second legs inwardly towards the connection point; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
14. (cancelled) 15. (cancelled) 16. (cancelled) 17. (cancelled) 18. (cancelled) l9. (cancelled) 20. The method of claim 5, wherein the legs are approximately the same side and wherein the leg fold line is provided slightly above the mid-points of the legs.
21. (cancelled) 22. (cancelled) 23. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and providing a thick top seal and providing a handle opening in the seal.
24. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V-fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly towards the connection point;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall; and pinching in the fold lines to create reinforced side edges.
25. (cancelled) 26. A method of making a container from flexible material comprising:
placing a V-fold in a sheet of flexible material to form an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the first and second V-fold members connected along a first fold line;
placing on the intermediate structure a first side edge weld line connecting the upper edges with said lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with said lower edges, the second side edge being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second leg which are connected along the first fold line;
forming a first oblique weld line interconnecting the point of intersection of the first side edge weld line and the first fold line with the lower edge of the first subsection to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member, thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
forming a second oblique weld line interconnecting the point of intersection of the second side edge weld line and the first fold line with the lower edge of the first subsection to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member, thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first leg inwardly towards the first fold line;
folding the second leg inwardly towards the first fold line;
separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a frontwall, a rearwall and a pair of opposing side edges interconnecting the frontwall and the rearwall; and attaching the endmost portions to the side edges.
27. The method of claim 26, further comprising the step of placing a top seal between the first and second side edge weld lines top seal said container.
28. (cancelled) 29. The method of claim 26, wherein said first V-fold member and said second V-fold member are of different lengths and one of said legs; is folded a plurality of times.
30. A method of making a container from material, comprising:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a V-fold section intermediate the first and second subsections having a first V-fold member attached to the lower edge of the first subsection and a second V-fold member attached to the lower edge of the second subsection, the top edge of the first V fold member connected to the top edge of the second V-fold member at a connection point;
placing on the intermediate structure a first side edge weld line connecting the upper edges with the lower edges to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member;
placing on the intermediate structure a second side edge weld line connecting the upper edges with the lower edges, the second side edge weld line being a distance from the first side edge weld line to weld the first subsection to the second subsection and to the first V-fold member and to weld the second subsection to the second V-fold member, thereby forming first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
placing another weld line between the first and second side edge weld lines at approximately the middle point of the first leg to weld the first subsection to the first V-fold member and the second subsection to the second V-fold member, and folding said legs along said another weld line;
folding the first and second legs inwardly towards the connection point; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines and to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
31. (cancelled) 32. A method of making a container from material comprising the steps of:
forming the material into an intermediate structure having a first subsection having an upper edge and a lower edge, a second subsection underlying the first subsection and having an upper edge and a lower edge, and a folded section intermediate the first and second subsections having a first fold attached to the lower edge of the first subsection, a second fold attached to the lower edge of the second subsection and a middle fold extending between and joined to the first and second folds along fold lines, welding the side edges of the intermediate structure together along first and second side edge weld lines thereby welding the first and second subsections together to form first and second legs;
placing on the intermediate structure first and second legs a first oblique weld line interconnecting the first side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first fold and the second subsection to the second fold thereby forming endmost portions of said legs bounded by said first side edge weld, said lower edges and said first oblique weld line;
placing on the intermediate structure first and second legs a second oblique weld line interconnecting the second side edge weld line and the lower edge of the first and second subsections to weld the first subsection to the first fold and the second subsection to the second fold thereby forming other endmost portions of said legs bounded by said second side edge weld, and said lower edges and said second oblique weld line;
folding the first and second legs inwardly; and separating the first subsection from the second subsection to form an interior space between the first and second side edge weld lines so as to cause the endmost portions of the legs to pivot upwardly towards the first side edge weld line and the second side edge weld line respectively to form said container having a front wall, a rear wall and a pair of opposing side edges interconnecting the front wall and rear wall.
33. The method of claim 32 wherein forming the material into the intermediate structure the middle fold is formed extending at oblique angles from the first and second folds.
34. The method of claim 32 further comprising the step of folding the first and second legs inwardly after placing the first and second oblique weld lines.
35. The method of claim 34 further comprising the step of folding the first and second legs inwardly after placing the first and second oblique weld lines.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/517,787 US5135464A (en) | 1990-05-02 | 1990-05-02 | Method for manufacturing a container |
| US517,787 | 1990-05-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2082072A1 true CA2082072A1 (en) | 1991-11-03 |
Family
ID=24061230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002082072A Abandoned CA2082072A1 (en) | 1990-05-02 | 1991-05-01 | Container and method for manufacturing the same |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5135464A (en) |
| EP (1) | EP0528953A4 (en) |
| AR (1) | AR247515A1 (en) |
| AU (1) | AU7900891A (en) |
| CA (1) | CA2082072A1 (en) |
| WO (1) | WO1991017089A1 (en) |
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| USD409481S (en) * | 1996-08-19 | 1999-05-11 | The Coca-Cola Company | Container |
| US6164825A (en) * | 1996-11-26 | 2000-12-26 | The Coca-Cola Company | Stable, flexible, easy open pouch |
| US6076968A (en) * | 1996-11-26 | 2000-06-20 | The Coca-Cola Company | Easy open flexible pouch |
| US6120183A (en) * | 1997-08-19 | 2000-09-19 | Technical Developers, Inc. | Container and method of manufacturing same from a web of flexible material |
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| US6319184B1 (en) * | 1998-06-09 | 2001-11-20 | Bob Dematteis Co. | Apparatus and process for producing cold seal in plastic bags |
| CZ20004856A3 (en) * | 1998-07-08 | 2002-01-16 | Flexipol Packaging Limited | Bags of easy open construction |
| GB2339184A (en) * | 1998-07-08 | 2000-01-19 | Flexipol Packaging Ltd | Plastic bag for bulk material |
| JP2001328652A (en) * | 2000-05-19 | 2001-11-27 | Hosokawa Yoko Co Ltd | Discharging gun cartridge, discharging gun cartridge assembly, and manufacturing method of the discharging gun cartridge |
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| EP1315658B1 (en) * | 2000-08-29 | 2004-10-20 | Societe Des Produits Nestle S.A. | Flexible container having flat walls |
| USD448988S1 (en) | 2001-02-08 | 2001-10-09 | Kapak Corporation | Stand-up pouch for holding liquids |
| US20040025476A1 (en) * | 2002-04-10 | 2004-02-12 | Oliverio Frank G. | Stand-up pouch forming, filling and sealing |
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| CA2509048C (en) * | 2002-12-09 | 2010-09-21 | Cmd Corporation | Recloseable bag |
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| USD782324S1 (en) | 2015-12-02 | 2017-03-28 | Poly-America, L.P. | Reclosable shopping bag |
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| USD784824S1 (en) | 2015-12-09 | 2017-04-25 | Poly-America, L.P. | Reclosable shopping bag |
| IT201700052473A1 (en) * | 2017-05-15 | 2018-11-15 | Egidio Galbani S R L | PACKAGING FOR CASE PRODUCTS AND RELATIVE PROCEDURE FOR REALIZATION |
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-
1990
- 1990-05-02 US US07/517,787 patent/US5135464A/en not_active Expired - Lifetime
-
1991
- 1991-05-01 CA CA002082072A patent/CA2082072A1/en not_active Abandoned
- 1991-05-01 WO PCT/US1991/002992 patent/WO1991017089A1/en not_active Application Discontinuation
- 1991-05-01 EP EP19910910061 patent/EP0528953A4/en not_active Withdrawn
- 1991-05-01 AU AU79008/91A patent/AU7900891A/en not_active Abandoned
- 1991-05-02 AR AR91319588A patent/AR247515A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| EP0528953A4 (en) | 1993-06-02 |
| EP0528953A1 (en) | 1993-03-03 |
| AR247515A1 (en) | 1995-01-31 |
| AU7900891A (en) | 1991-11-27 |
| US5135464A (en) | 1992-08-04 |
| WO1991017089A1 (en) | 1991-11-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 19970501 |