EP1442991A1 - A bag - Google Patents
A bag Download PDFInfo
- Publication number
- EP1442991A1 EP1442991A1 EP03250390A EP03250390A EP1442991A1 EP 1442991 A1 EP1442991 A1 EP 1442991A1 EP 03250390 A EP03250390 A EP 03250390A EP 03250390 A EP03250390 A EP 03250390A EP 1442991 A1 EP1442991 A1 EP 1442991A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bag
- seal
- further characterized
- collapsed configuration
- bag according
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- 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
- B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
Definitions
- This invention relates to a bag, e.g. a bag made of a synthetic material, which may be used for containing refuse.
- Figs. 1A to 1 C show various views of a conventional bag 10 made of a sheet of plastic material.
- Fig. 1A shows a view of the plastic bag 10 in a fully collapsed configuration
- Fig. 1B shows a sectional view of the plastic bag 10 taken along a line P-P in Fig. 1A.
- a width of the sheet of plastic material is folded inward of a respective designed lateral edge of the bags 10, each forming a gusset, and a straight seal 12 is then formed near the intended bottom end and transverse to the length of the bag 10, by heat sealing at a temperature of 200 to 350°C, in the conventional manner. It is however found in practice that the region between two points, namely M and N shown in Figs.
- a bag with an opening at a first end and at least a seal adjacent to a second end, wherein said bag is movable between a collapsed configuration in which said bag is substantially flat and an expanded configuration in which said bag is fully inflated and said opening is closed, characterized in that said seal is non-straight when said bag is in said collapsed configuration.
- Fig. 2 shows a side view of a plastic bag according to the present invention, generally designated as 100, in a fully collapsed configuration.
- the bag 100 has an open end 102, and a closed end 104.
- the open end 102 may be closed in a substantially airtight manner by strings (not shown) or such other conventional closure means.
- the bag 100 may be made of such plastic material as low density or high density polyethylene.
- the bag 100 is shown here as formed with two seats, namely a straight seal 106, represented by a straight line ST in Fig. 2, and a non-straight seal 108, represented by a non-straight line AG. both close to the closed end 104.
- a straight seal 106 represented by a straight line ST in Fig. 2
- a non-straight seal 108 represented by a non-straight line AG. both close to the closed end 104.
- the seal 106 is of the same structure as the seal 12 of the bag 10 shown in Fig. 1A, it is in fact only of cosmetic purpose in the bag 100, for the reasons to be discussed below.
- the seal 108 is non-straight.
- the seal 108 is made up of a straight line segment AB starting from one lateral edge of the bag 100 leading downwardly towards the closed end 104, joined by an arc BC with a centre of curvature O 2 downward of the seal 108, followed by an arc CDE with a centre of curvature O 1 upward of the seal 108, followed by an arc EF with a centre of curvature O 3 downward of the seal 108, then a straight line segment FG ending at the other lateral edge of the bag 100, It can be seen that the centre of curvature O 1 is on the longitudinal centre line L-L of the bag 100.
- the arcs BC and EF are thus curved towards the open end 102, and the arc CDE is curved towards the bottom end 104.
- the line ABCD is symmetrical to the line GFED about the longitudinal centre line L-L. It can also be seen that the line segments AB and FG, when extended when the bag 100 is in the fully collapsed configuration, will intersect an angle ⁇ , which is an obtuse angle.
- the width of the bag 100 may be from 300mm to 1,000mm, depending on customer requirements, and the width of the seals 106 and 108 may be from 0.8mm to 2mm.
- the ranges of other dimensions are as follows:
- the distance between the points A and G to the open end 102 is shorter than the distance between the point D (where the seal 108 intersects the longitudinal centre line L-L of the bag) and the open end 102.
- the bag 100 according to the present invention When the bag 100 according to the present invention is in its fully expanded configuration, i.e. fully inflated and substantially airtightly closed adjacent to the open end 102, although the seal 106 will still be bent upwardly towards the mouth of the bag 100, the seal 108 will however constitute a straight line, as can be seen in Fig. 3.
- the whole of the seal 108 will contribute equally to bearing the loading of the content in the bag 100, thus increasing the loading capacity of the bag 100, when the bag 100 is in its fully expanded configuration. It is found in experiments that the loading capacity of a bag made in accordance with the present invention can be as much as eight times that of a conventional bag, i.e. one with the conventional seal 12 only, made of the same type and amount of material.
- the seal 106 is only of cosmetic purpose only, i.e. to enhance the aesthetic appearance of the bag 100, but does not contribute to the load-bearing capacity of the bag 100.
- the seal 108 may or may not touch the seal 106, and if the seal 108 is designed not to touch the seal 106, their distance is at the discretion of the manufacturer.
Abstract
Description
- This invention relates to a bag, e.g. a bag made of a synthetic material, which may be used for containing refuse.
- Figs. 1A to 1 C show various views of a
conventional bag 10 made of a sheet of plastic material. Fig. 1A shows a view of theplastic bag 10 in a fully collapsed configuration, and Fig. 1B shows a sectional view of theplastic bag 10 taken along a line P-P in Fig. 1A. During the production of theplastic bag 10, a width of the sheet of plastic material is folded inward of a respective designed lateral edge of thebags 10, each forming a gusset, and astraight seal 12 is then formed near the intended bottom end and transverse to the length of thebag 10, by heat sealing at a temperature of 200 to 350°C, in the conventional manner. It is however found in practice that the region between two points, namely M and N shown in Figs. 1A and 1B, where theseal 12 meets the gussets is the weakest in terms of loading capacity. This usually results in leakage of the contents in thebag 10 through or around this region, or thebag 10 is torn apart around the region between the points M and N, on the weight of the contents. - This phenomenon can be more clearly explained with reference to Fig. 1B, In particular, it is found that when such a conventional
plastic bag 10 is fully expanded, i.e. fully inflated and closed at its mouth in an airtight manner, theseal 12 is bent with its mid portion, i.e. the region between the points M and N, nearer to the mouth of thebag 10 than the rest of theseal 12. In this way, the region between the points M and N will have to bear a higher proportion of the pressure exerted by the contents in thebag 10 on theseal 12 than the rest of theseal 12. Put another way, the pressure exerted by contents in thebag 10 on theseal 12 is not even, thus causing some part of the seal, namely the region between the points M and N in thebag 10 shown in Fig. 1B, to bear a higher pressure than other part of theseal 12, - It is thus an object of the present invention to provide a bag in which the aforesaid shortcomings are mitigated, or at least to provide a useful alternative to the public.
- It is a further object of the present invention to provide a bag with a higher loading capacity, as compared with a conventional bag made of the same type and amount of material.
- According to the present invention, there is provided a bag with an opening at a first end and at least a seal adjacent to a second end, wherein said bag is movable between a collapsed configuration in which said bag is substantially flat and an expanded configuration in which said bag is fully inflated and said opening is closed, characterized in that said seal is non-straight when said bag is in said collapsed configuration.
- An embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
- Fig. 1A is a side view of a prior art plastic bag in a fully collapsed configuration;
- Fig. 1B is a side view of the plastic bag shown in Fig. 1A, in a fully expanded configuration;
- Fig. 1C is a sectional view of the prior art plastic bag taken along the line P-P in Fig. 1A;
- Fig. 2 is a side view of a plastic bag according to the present invention in a fully collapsed configuration; and
- Fig. 3 is a side view of the plastic bag shown in Fig. 2, in a fully expanded configuration.
-
- Fig. 2 shows a side view of a plastic bag according to the present invention, generally designated as 100, in a fully collapsed configuration. The
bag 100 has anopen end 102, and a closedend 104. Theopen end 102 may be closed in a substantially airtight manner by strings (not shown) or such other conventional closure means. Thebag 100 may be made of such plastic material as low density or high density polyethylene. - The
bag 100 is shown here as formed with two seats, namely astraight seal 106, represented by a straight line ST in Fig. 2, and anon-straight seal 108, represented by a non-straight line AG. both close to the closedend 104. In this connection, although theseal 106 is of the same structure as theseal 12 of thebag 10 shown in Fig. 1A, it is in fact only of cosmetic purpose in thebag 100, for the reasons to be discussed below. - Referring to Fig. 2, it can be seen that, when the
bag 100 is in this fully collapsed configuration, theseal 108 is non-straight. In particular, theseal 108 is made up of a straight line segment AB starting from one lateral edge of thebag 100 leading downwardly towards the closedend 104, joined by an arc BC with a centre of curvature O2 downward of theseal 108, followed by an arc CDE with a centre of curvature O1 upward of theseal 108, followed by an arc EF with a centre of curvature O3 downward of theseal 108, then a straight line segment FG ending at the other lateral edge of thebag 100, It can be seen that the centre of curvature O1 is on the longitudinal centre line L-L of thebag 100. The arcs BC and EF are thus curved towards theopen end 102, and the arc CDE is curved towards thebottom end 104. The line ABCD is symmetrical to the line GFED about the longitudinal centre line L-L. It can also be seen that the line segments AB and FG, when extended when thebag 100 is in the fully collapsed configuration, will intersect an angle , which is an obtuse angle. - The width of the
bag 100 may be from 300mm to 1,000mm, depending on customer requirements, and the width of theseals - R1: 100mm to 300mm;
- f: 3mm to 15mm;
- a: 10 to 100mm;
- b: 130mm to 340mm. As to the value of R2, such can be determined by reference to the value of f and b, since the circle of which the arc BC forms a part only touches the circle of which the arc CD forms a part, and the line segment AB, when extended, is tangent to the arc CD.
- It can be seen that the distance between the points A and G to the
open end 102 is shorter than the distance between the point D (where theseal 108 intersects the longitudinal centre line L-L of the bag) and theopen end 102. - When the
bag 100 according to the present invention is in its fully expanded configuration, i.e. fully inflated and substantially airtightly closed adjacent to theopen end 102, although theseal 106 will still be bent upwardly towards the mouth of thebag 100, theseal 108 will however constitute a straight line, as can be seen in Fig. 3. By reason of such a change in the shape of theseal 108, the whole of theseal 108 will contribute equally to bearing the loading of the content in thebag 100, thus increasing the loading capacity of thebag 100, when thebag 100 is in its fully expanded configuration. It is found in experiments that the loading capacity of a bag made in accordance with the present invention can be as much as eight times that of a conventional bag, i.e. one with theconventional seal 12 only, made of the same type and amount of material. - As the weight of the contents in the
bag 100 will be borne by theseal 108 only, theseal 106 is only of cosmetic purpose only, i.e. to enhance the aesthetic appearance of thebag 100, but does not contribute to the load-bearing capacity of thebag 100. Theseal 108 may or may not touch theseal 106, and if theseal 108 is designed not to touch theseal 106, their distance is at the discretion of the manufacturer. - It should be understood that the above only illustrates and describes an example whereby the present invention may be carried out, and that modifications and/or alterations may be made thereto without departing from the spirit of the invention.
- It should also be understood that various features of the invention which are, for brevity, described in the context of a single embodiment, may be provided separately or in any suitable sub-combination.
Claims (10)
- A bag (100) with an opening at a first end (102) and at least a seal (108) adjacent to a second end (104), wherein said bag is movable between a collapsed configuration in which said bag is substantially flat and an expanded configuration in which said bag is fully inflated and said opening is closed, characterized in that said seal is non-straight when said bag is in said collapsed configuration.
- A bag according to Claim 1 further characterized in that said seal is substantially straight when said bag is in said expanded configuration.
- A bag according to Claim 1 further characterized in that said seal has two end portions joined by a middle portion which intersects a longitudinal centre line (L-L) of said bag, wherein the distance between at least one said end portion and said first end is shorter than the distance between said first end and a point (D) where said middle portion intersects said longitudinal centre line.
- A bag according to Claim 1 further characterized in that said seal includes at least two straight lines (AB, FG) which, when extended when said bag is in said collapsed configuration, intersect at an angle.
- A bag according to Claim 1 further characterized in that when said bag is in said collapsed configuration, said seal includes at least a curved portion (BC, CE, EF).
- A bag according to Claim 5 further characterized in that when said bag is in said collapsed configuration, said seal includes at least two curved portions, at least one curving towards the first end and at least one curving towards the second end.
- A bag according to Claim 1 further characterized in that said seal is substantially symmetrical about a central longitudinal axis (L-L) of said bag.
- A bag according to Claim 1 further characterized in including at least a further seal (106) which, when said bag is in said collapsed configuration, is in the form of a straight line.
- A bag according to Claim 8 further characterized in that said seal (108) is in contact with said further seal (106),
- A bag according to Claim 8 further characterized in that said seal (108) is out of contact with said further seal (106).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03250390A EP1442991A1 (en) | 2003-01-22 | 2003-01-22 | A bag |
US10/400,517 US20040141665A1 (en) | 2003-01-22 | 2003-03-28 | Bag |
HK03108763A HK1057446A2 (en) | 2003-01-22 | 2003-12-01 | A bag |
AU2004200208A AU2004200208A1 (en) | 2003-01-22 | 2004-01-20 | A Bag |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03250390A EP1442991A1 (en) | 2003-01-22 | 2003-01-22 | A bag |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1442991A1 true EP1442991A1 (en) | 2004-08-04 |
Family
ID=32524252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03250390A Withdrawn EP1442991A1 (en) | 2003-01-22 | 2003-01-22 | A bag |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040141665A1 (en) |
EP (1) | EP1442991A1 (en) |
AU (1) | AU2004200208A1 (en) |
HK (1) | HK1057446A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101708786A (en) * | 2009-10-27 | 2010-05-19 | 覃汉昇 | Plastic film bag capable of improving bearing capacity |
JP6082208B2 (en) * | 2012-08-17 | 2017-02-15 | 株式会社ソフトマシーン | Inner bag for drum can, inner bag unit and filling method |
WO2015045509A1 (en) * | 2013-09-27 | 2015-04-02 | 株式会社フジシールインターナショナル | Pouch container packaging and pouch container |
US20210130070A1 (en) * | 2018-05-08 | 2021-05-06 | The Glad Products Company | Thermoplastic bags with liquid directing structures |
US11315716B2 (en) | 2018-08-14 | 2022-04-26 | The Procter & Gamble Company | Process and apparatus for the magnetization of magnetizable materials |
EP3837179B1 (en) * | 2018-08-14 | 2022-08-24 | The Procter & Gamble Company | Adaptive packaging |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB776382A (en) * | 1954-12-17 | 1957-06-05 | Metal Box Co Ltd | An improved bag and method of making same |
FR1234140A (en) * | 1958-12-20 | 1960-10-14 | Process for manufacturing bags and bags obtained by this process | |
FR1349272A (en) * | 1962-11-14 | 1964-01-17 | Plastic container and its manufacturing process | |
EP0933302A2 (en) * | 1998-02-02 | 1999-08-04 | Hosokawa Yoko Co., Ltd | Gusseted bag for medical use |
US6131806A (en) * | 1998-11-19 | 2000-10-17 | Aptargroup, Inc. | Dispensing structure incorporating a valve-containing fitment for mounting to a container and a package with a dispensing structure |
US6193416B1 (en) * | 1996-09-27 | 2001-02-27 | Kao Corporation | Gusseted bag |
US6254907B1 (en) * | 1999-12-21 | 2001-07-03 | Fres-Co System Usa, Inc. | Bowl bag with resealable closure means |
US20020121049A1 (en) * | 1996-02-26 | 2002-09-05 | Weder Donald E. | Method of covering a pot or floral grouping with a sleeve having a curvilinear lower end |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3051368A (en) * | 1958-11-28 | 1962-08-28 | Schneider | Dispensing container |
US3762542A (en) * | 1971-11-24 | 1973-10-02 | Questor Corp | Infant feeding means |
FR2215359B1 (en) * | 1973-01-26 | 1980-03-21 | Doyen Leon | |
JP3410142B2 (en) * | 1993-03-30 | 2003-05-26 | 株式会社平野屋物産 | Easy-to-open, self-supporting synthetic resin bag |
US5860743A (en) * | 1996-11-27 | 1999-01-19 | The Coca-Cola Company | Stable flexible pouch and method for making the pouch |
US6270819B1 (en) * | 1997-09-23 | 2001-08-07 | Cryovac, Inc. | Patch bag having curved seal and curved patch |
-
2003
- 2003-01-22 EP EP03250390A patent/EP1442991A1/en not_active Withdrawn
- 2003-03-28 US US10/400,517 patent/US20040141665A1/en not_active Abandoned
- 2003-12-01 HK HK03108763A patent/HK1057446A2/en not_active IP Right Cessation
-
2004
- 2004-01-20 AU AU2004200208A patent/AU2004200208A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB776382A (en) * | 1954-12-17 | 1957-06-05 | Metal Box Co Ltd | An improved bag and method of making same |
FR1234140A (en) * | 1958-12-20 | 1960-10-14 | Process for manufacturing bags and bags obtained by this process | |
FR1349272A (en) * | 1962-11-14 | 1964-01-17 | Plastic container and its manufacturing process | |
US20020121049A1 (en) * | 1996-02-26 | 2002-09-05 | Weder Donald E. | Method of covering a pot or floral grouping with a sleeve having a curvilinear lower end |
US6193416B1 (en) * | 1996-09-27 | 2001-02-27 | Kao Corporation | Gusseted bag |
EP0933302A2 (en) * | 1998-02-02 | 1999-08-04 | Hosokawa Yoko Co., Ltd | Gusseted bag for medical use |
US6131806A (en) * | 1998-11-19 | 2000-10-17 | Aptargroup, Inc. | Dispensing structure incorporating a valve-containing fitment for mounting to a container and a package with a dispensing structure |
US6254907B1 (en) * | 1999-12-21 | 2001-07-03 | Fres-Co System Usa, Inc. | Bowl bag with resealable closure means |
Also Published As
Publication number | Publication date |
---|---|
HK1057446A2 (en) | 2004-03-05 |
US20040141665A1 (en) | 2004-07-22 |
AU2004200208A1 (en) | 2004-08-12 |
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