CA1293633C - Bags - Google Patents
BagsInfo
- Publication number
- CA1293633C CA1293633C CA000542767A CA542767A CA1293633C CA 1293633 C CA1293633 C CA 1293633C CA 000542767 A CA000542767 A CA 000542767A CA 542767 A CA542767 A CA 542767A CA 1293633 C CA1293633 C CA 1293633C
- Authority
- CA
- Canada
- Prior art keywords
- bag
- cut
- refuse
- bags
- panels
- 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.)
- Expired - Lifetime
Links
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
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/1608—Integral flaps for tying above the bag
Abstract
ABSTRACT
A method of manufacturing a garbage bag comprises (a) extruding a tube of plastics material; (b) lay-ing the tube flat to form front and rear panels;
(c) welding the tube transversely to the direction of extrusion with a set of two straight end welds at suitably spaced locations; (d) cutting the material at an end cut between each pair of end welds, and (d) cutting the material at sinusoidal separating cut which will form an open end for for two bags between a pair of end welds and which extends generally transversely to the bag. The separating cut provides cut-outs are formed in the said open ends to leave projecting tie parts which are capable of being tied together to close the opening.
A method of manufacturing a garbage bag comprises (a) extruding a tube of plastics material; (b) lay-ing the tube flat to form front and rear panels;
(c) welding the tube transversely to the direction of extrusion with a set of two straight end welds at suitably spaced locations; (d) cutting the material at an end cut between each pair of end welds, and (d) cutting the material at sinusoidal separating cut which will form an open end for for two bags between a pair of end welds and which extends generally transversely to the bag. The separating cut provides cut-outs are formed in the said open ends to leave projecting tie parts which are capable of being tied together to close the opening.
Description
~293633 Thi~ invention relates bD bag~
The invention is concerned with a bag of the kind used for storing and or transporting material such as garbage or refuse prior to collection for or transport to dispo-~al. Such bags are formed from pla~tic~ material and comprise, in the flàt condition, two rectangular panels which are not connected along only one end, so that there i5 an open1ng through which matter can be inserted into the bag. The bag is normally ~ade from a tubular extrusion. Such a bag is hereinafter called ~a bag o~ the kind set forth~.
3ags of the kind ~et forth ara popular and are widely u3ed especially for preparing kitchen refuse lS for collection by municipal garbage collectors. A
problem that is often encount-red with sucn bags i~
that it is often difficult to cLose them es~ecially when ~uostantially Sull. As a consequence there is usually some spillage. Fur~hermore dogs can become aware of the contents and will de~troy the bags in an attempt to reach the contents. In an attempt to clos~ these bags these are oeten tiad at the corners - which r~duces the capacity of the bags.
These bags are normally made from extruded tube 25 from which the bag~ are parted. Attempt~ have been 4145;/V20/SpSt ?age 2 12~3633 made to modify the shape of the bags so that they have projections or tie parts which will facilitate the closing of the open end. For example in US
Patent No 3 774 838 there is shown an arrangement 5 wherein a large cut-out is provided near one end with a join cut to that end. This arrangement prov-ides a pair of tie parts but is greatly reduces the capacity of the bag. In US Patents 3 961 743 and 4 445 230 there are shown arrangements wherein the 10 parting is shaped sc, that a pair of projecting tie parts or tails are formed that can be so tied. With two such tie parts the closure is not as satisfac-tory as with four tie parts. US Patent No 4 345 712 shows an arrangement wherein four projections or tie 15 parts are provided. In the latter three arrangments, the base of a bag has a shape corresponding to the shape of the open end of the adjacent bag and in all the arrangements shown in these specifications the bags are gussetted which has the effect of 20 reducing the capacity of the bag for the amount of plastic material used in forming the bag.
According to an aspect of the invention there is provided a method of manufacturing a refuse bag used for storing and/or for transporting material 25 such as garbage or refuse prior to collection or transport to disposal comprising: welding front and 44455/V20/Sp54/S1 Page 3 ~3~3 rear panels of material with straight end welds that join the panels together at suitably spaced loca-tions, said end welds extending transversely to the direction of the bag, i.e.transversely to the direc-tion of extrusion, for forming bag bottoms; cuttingthe material at an end cut at each end weld; and cutting the material at a separating cut which will form an open end for two bags between a pair of end welds and which extends generally transversely to the bag, the said separating cut being so shaped, preferably by being generally sinusoidal, that cut-outs are formed in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening whereby each bag has a capacity substantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than such rectangular refuse bag. With this arr-angement there is a straight closed welded end and there are four tie parts. The said separating cut is preferably so arranged that the tie parts in each bag correspond to the cut-outs in the other bag of the said two bags.
Each end weld preferably comprises a pair of spaced welds and preferably the method further com-prises providing an end cut between the two welds to separate the two bags from the material.
44455/V20/Sp54/S1 Page 4 r ~ ~
12~3633 According to a further aspect of the invention there is provided a bag when manufactured as des-cribed above.
According to another aspect of the invention there is provided a roll of tubular plastics materi-al from which is formed a plurality of refuse bags used for storing and/or transporting material such as garbage or-refuse prior to collection or trans-port to disposal comprising: (a) front and rear panels of material; (b) straight end welds that weld the panels together at suitably spaced loca-tions, transversely to the direction of the bag;
(c) an end cut adjacent to each end weld; and (d) a generally sinusoidal transverse separating cut form-ing an open end for two refuse bags between two pairs of end welds, the said separating cut being so shaped that cut-outs are formed in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening, whereby each bag has a capacity subs-tantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than such a rectangular refuse bag.
44455/V20/Sp54/Sl Page 4a An embodiment of the invention will now be described by way of example with re~erence to the accompanying drawings.
In the drawings:-Figure 1 sho~s an extruded tube that has been laidflat immediately prior to separation of the bags, : Figure 2 is a side view of two bags formed from the tube, Figure 3 is a perspective view from the side when filled but not yet closed, and Figure 4 is a front view of the bag when filled and closed.
~ eferring now to Figure 1 there is shown an extruded tube 10 of plastics material which is arranged in lay-flat form i.e. with front and rear panels joined along their edges 12 (without any gussets being formed). The tube 10 is processed in welding and cutting apparatus (not shown) which provides the welds and cuts as will be described. A
straight transverse end weld 14 (that welds the front and rear panels of the material toget'ner) is provided transversely to the direction of extrusion "A" at suitably spaced locations 16 and 18. The end weld 14 comprises a pair of spaced parallel welds 20 44455/V20/Sp54 Page 5 and 22. A transverse end cut 24 is made between the two welds 20 and 22 to form the two bags. It will be seen that in the flat condition the bags comprise two rectangular panels joined at their edges 12 and 5 at the end welds 14.
The apparatus also makes a separating cut 26 which will form the open ends 28 for each of the two bags that are formed between a pair of end cuts 24.
The separating cut 26 is located midway between the 10 end cuts 24 and is generally sinusoidal having a central crest 26.1, two valleys 26.2 on either side of the crest 26.1 and two half crests 26.3 outside the valleys 26.2. Therefore in each of the bags 30 and 32 that are thus formed cut-outs 34 to leave 15 projecting tie parts 36 in the other bag which tie parts 36 are capable of being tied together to close the opening as will be described.
It will be seen that the two bags 30 and 32 have open ends which when the bags are in the lay-20 flat condition appear to be of different appearance.However once these ends are open, they will be of the same shape each with four cut-outs 34 and four projecting tie parts 36.
When the bag 10 is filled with refuse (as shown 25 in Figure 3), the diametrically opposite projecting tie parts 36 can be tied together to provide a sub-stantially complete closure for the opening to the 44455/V20/Sp54/S1 Page 6 ~ag 10. (In the Figure 3, there are shown open-ings 24 between the tie parts 22. This is for the purpose of clarity only and in fact these openings will be very small indeed.) I have ~ound that this closure is more than adequate for the normal purposes to which the bag 10 is put in domestic circumstances.
In this specification I have used the term "cut" in a broad sense with the intention that it covers both a parting cut which parts one item from another and a perforation cut which provides a line of weakness that permits the items to be parted from one another conveniently by tearing or pulling. Thus the bags will either be provided as separate items or as seQarable parts of an elongated roll of mater-ial which can be parted therefrom either in a co~-mercial outlet or in the home when required.
It will be seen that by maXing the bags as des-cribed above the considerable amount of material are saved in addition to providing bags which are conve-nient to use for tieing corners to close the open ends. This because with conventional bags only a portion can be filled if material is to be left to 44455/V20/Sp54 Page 7 lZ93633 form ties. The upper limit of such ~illing is norm-ally no more than a position slightly lower than the valleys of the cut-outs 34. Furthermore by having a straight end weld, the bag is capa~le o~ being fill-ed to the maximum amount. Thus for forming bags 10of the invention of the same practical capacity as conventional bags, up to 10~ (ten per cent) of t'ne bagforming material may be saved.
The invention is not limited to the precise constructional details hereinbefore described and illustrated. For example the bags may have more projections and cut-outs. The shape of the projec-tions and cut-outs may vary as desired. These are preferably shàpes with rounded corners but they may be zig-zag or rectangular in shape pre~erably with suitable means being provided to prevent tearing at the corners. The bags may be formed in pairs joined at perforation cuts at either the open or the closed end.
The bags may also be used for other storarge or transport purposes such as carrier bags as used in shops and supermarkets. The sizes of the bags may vary in dependance upon the task to which the bags are to be put.
44455/V20/Sp54 Page 8 - lZ93633 `
The bags ~ay be gussett~d if desired even though this will reduce the capacity of the bag as co~pared to that described above. However the provision of the straiyht closed end and the interleaved cut-outs and tie parts results in the bag having a larger capacity than th~ known bags mentioned above.
The currently preferred plastics materials are high den~ity or low density polyethylene or polypropylene. Other plastics materials are appreciated by those skilled in the art.
44455/V20/SpS4 Page 9 .,,, ,-- ~ .
The invention is concerned with a bag of the kind used for storing and or transporting material such as garbage or refuse prior to collection for or transport to dispo-~al. Such bags are formed from pla~tic~ material and comprise, in the flàt condition, two rectangular panels which are not connected along only one end, so that there i5 an open1ng through which matter can be inserted into the bag. The bag is normally ~ade from a tubular extrusion. Such a bag is hereinafter called ~a bag o~ the kind set forth~.
3ags of the kind ~et forth ara popular and are widely u3ed especially for preparing kitchen refuse lS for collection by municipal garbage collectors. A
problem that is often encount-red with sucn bags i~
that it is often difficult to cLose them es~ecially when ~uostantially Sull. As a consequence there is usually some spillage. Fur~hermore dogs can become aware of the contents and will de~troy the bags in an attempt to reach the contents. In an attempt to clos~ these bags these are oeten tiad at the corners - which r~duces the capacity of the bags.
These bags are normally made from extruded tube 25 from which the bag~ are parted. Attempt~ have been 4145;/V20/SpSt ?age 2 12~3633 made to modify the shape of the bags so that they have projections or tie parts which will facilitate the closing of the open end. For example in US
Patent No 3 774 838 there is shown an arrangement 5 wherein a large cut-out is provided near one end with a join cut to that end. This arrangement prov-ides a pair of tie parts but is greatly reduces the capacity of the bag. In US Patents 3 961 743 and 4 445 230 there are shown arrangements wherein the 10 parting is shaped sc, that a pair of projecting tie parts or tails are formed that can be so tied. With two such tie parts the closure is not as satisfac-tory as with four tie parts. US Patent No 4 345 712 shows an arrangement wherein four projections or tie 15 parts are provided. In the latter three arrangments, the base of a bag has a shape corresponding to the shape of the open end of the adjacent bag and in all the arrangements shown in these specifications the bags are gussetted which has the effect of 20 reducing the capacity of the bag for the amount of plastic material used in forming the bag.
According to an aspect of the invention there is provided a method of manufacturing a refuse bag used for storing and/or for transporting material 25 such as garbage or refuse prior to collection or transport to disposal comprising: welding front and 44455/V20/Sp54/S1 Page 3 ~3~3 rear panels of material with straight end welds that join the panels together at suitably spaced loca-tions, said end welds extending transversely to the direction of the bag, i.e.transversely to the direc-tion of extrusion, for forming bag bottoms; cuttingthe material at an end cut at each end weld; and cutting the material at a separating cut which will form an open end for two bags between a pair of end welds and which extends generally transversely to the bag, the said separating cut being so shaped, preferably by being generally sinusoidal, that cut-outs are formed in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening whereby each bag has a capacity substantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than such rectangular refuse bag. With this arr-angement there is a straight closed welded end and there are four tie parts. The said separating cut is preferably so arranged that the tie parts in each bag correspond to the cut-outs in the other bag of the said two bags.
Each end weld preferably comprises a pair of spaced welds and preferably the method further com-prises providing an end cut between the two welds to separate the two bags from the material.
44455/V20/Sp54/S1 Page 4 r ~ ~
12~3633 According to a further aspect of the invention there is provided a bag when manufactured as des-cribed above.
According to another aspect of the invention there is provided a roll of tubular plastics materi-al from which is formed a plurality of refuse bags used for storing and/or transporting material such as garbage or-refuse prior to collection or trans-port to disposal comprising: (a) front and rear panels of material; (b) straight end welds that weld the panels together at suitably spaced loca-tions, transversely to the direction of the bag;
(c) an end cut adjacent to each end weld; and (d) a generally sinusoidal transverse separating cut form-ing an open end for two refuse bags between two pairs of end welds, the said separating cut being so shaped that cut-outs are formed in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening, whereby each bag has a capacity subs-tantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than such a rectangular refuse bag.
44455/V20/Sp54/Sl Page 4a An embodiment of the invention will now be described by way of example with re~erence to the accompanying drawings.
In the drawings:-Figure 1 sho~s an extruded tube that has been laidflat immediately prior to separation of the bags, : Figure 2 is a side view of two bags formed from the tube, Figure 3 is a perspective view from the side when filled but not yet closed, and Figure 4 is a front view of the bag when filled and closed.
~ eferring now to Figure 1 there is shown an extruded tube 10 of plastics material which is arranged in lay-flat form i.e. with front and rear panels joined along their edges 12 (without any gussets being formed). The tube 10 is processed in welding and cutting apparatus (not shown) which provides the welds and cuts as will be described. A
straight transverse end weld 14 (that welds the front and rear panels of the material toget'ner) is provided transversely to the direction of extrusion "A" at suitably spaced locations 16 and 18. The end weld 14 comprises a pair of spaced parallel welds 20 44455/V20/Sp54 Page 5 and 22. A transverse end cut 24 is made between the two welds 20 and 22 to form the two bags. It will be seen that in the flat condition the bags comprise two rectangular panels joined at their edges 12 and 5 at the end welds 14.
The apparatus also makes a separating cut 26 which will form the open ends 28 for each of the two bags that are formed between a pair of end cuts 24.
The separating cut 26 is located midway between the 10 end cuts 24 and is generally sinusoidal having a central crest 26.1, two valleys 26.2 on either side of the crest 26.1 and two half crests 26.3 outside the valleys 26.2. Therefore in each of the bags 30 and 32 that are thus formed cut-outs 34 to leave 15 projecting tie parts 36 in the other bag which tie parts 36 are capable of being tied together to close the opening as will be described.
It will be seen that the two bags 30 and 32 have open ends which when the bags are in the lay-20 flat condition appear to be of different appearance.However once these ends are open, they will be of the same shape each with four cut-outs 34 and four projecting tie parts 36.
When the bag 10 is filled with refuse (as shown 25 in Figure 3), the diametrically opposite projecting tie parts 36 can be tied together to provide a sub-stantially complete closure for the opening to the 44455/V20/Sp54/S1 Page 6 ~ag 10. (In the Figure 3, there are shown open-ings 24 between the tie parts 22. This is for the purpose of clarity only and in fact these openings will be very small indeed.) I have ~ound that this closure is more than adequate for the normal purposes to which the bag 10 is put in domestic circumstances.
In this specification I have used the term "cut" in a broad sense with the intention that it covers both a parting cut which parts one item from another and a perforation cut which provides a line of weakness that permits the items to be parted from one another conveniently by tearing or pulling. Thus the bags will either be provided as separate items or as seQarable parts of an elongated roll of mater-ial which can be parted therefrom either in a co~-mercial outlet or in the home when required.
It will be seen that by maXing the bags as des-cribed above the considerable amount of material are saved in addition to providing bags which are conve-nient to use for tieing corners to close the open ends. This because with conventional bags only a portion can be filled if material is to be left to 44455/V20/Sp54 Page 7 lZ93633 form ties. The upper limit of such ~illing is norm-ally no more than a position slightly lower than the valleys of the cut-outs 34. Furthermore by having a straight end weld, the bag is capa~le o~ being fill-ed to the maximum amount. Thus for forming bags 10of the invention of the same practical capacity as conventional bags, up to 10~ (ten per cent) of t'ne bagforming material may be saved.
The invention is not limited to the precise constructional details hereinbefore described and illustrated. For example the bags may have more projections and cut-outs. The shape of the projec-tions and cut-outs may vary as desired. These are preferably shàpes with rounded corners but they may be zig-zag or rectangular in shape pre~erably with suitable means being provided to prevent tearing at the corners. The bags may be formed in pairs joined at perforation cuts at either the open or the closed end.
The bags may also be used for other storarge or transport purposes such as carrier bags as used in shops and supermarkets. The sizes of the bags may vary in dependance upon the task to which the bags are to be put.
44455/V20/Sp54 Page 8 - lZ93633 `
The bags ~ay be gussett~d if desired even though this will reduce the capacity of the bag as co~pared to that described above. However the provision of the straiyht closed end and the interleaved cut-outs and tie parts results in the bag having a larger capacity than th~ known bags mentioned above.
The currently preferred plastics materials are high den~ity or low density polyethylene or polypropylene. Other plastics materials are appreciated by those skilled in the art.
44455/V20/SpS4 Page 9 .,,, ,-- ~ .
Claims (24)
1. A method of manufacturing a refuse bag used for storing and/or transporting material such as garbage or refuse prior to collection or transport to disposal comprising:
welding front and rear panels of plastics material with straight end welds that join the panels together at suitably spaced locations, said end welds extending transversely to a longitudinal direction of the bag, for forming bag bottoms;
cutting the material to effect an end cut to each end weld, and cutting the material to effect a separating cut for forming open ends respectively for two bags between a pair of end welds, the said separating cut extending generally transversely to the bags and being shaped to effect cut-outs in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
welding front and rear panels of plastics material with straight end welds that join the panels together at suitably spaced locations, said end welds extending transversely to a longitudinal direction of the bag, for forming bag bottoms;
cutting the material to effect an end cut to each end weld, and cutting the material to effect a separating cut for forming open ends respectively for two bags between a pair of end welds, the said separating cut extending generally transversely to the bags and being shaped to effect cut-outs in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
2. A method as claimed in claim 1 including extruding the plastics material before said welding.
3. A method as claimed in claim 2 further comprising form-ing the plastics material in a tube and laying the material flat to form the said front and rear panels.
4. A method as claimed in claim 1 wherein the said separat-ing cut is generally sinusoidal in shape.
5. A method as claimed in claim 1 wherein the said separat-ing cut is so arranged that the projecting tie parts in each bag correspond to the cut-outs in the other bag of the said two bags.
6. A method as claimed in claim 3 wherein the end weld comprises a pair of spaced welds and the end cut is formed between the two welds to separate the two bags from the remainder of the material.
7. A method as claimed in claim 1 wherein at least one of the said cuts is a perforation cut.
8. A method of manufacturing a refuse bag used for storing and/or transporting material such as garbage or refuse prior to collection or transport to disposal, comprising welding rectangular panels of plastics material together with a straight end weld extending transversely to form the bottom of the bag, and cutting the material at a position remote from said end weld to form an open end of a bag, said cutting being such as to include cut outs in said panels for leaving four projecting tie parts which are capable of being tied together by hand to close the open end.
9. A method as claimed in claim 8 wherein the said cutting includes sinusoidally cutting each panel to produce a com-plete central crest, two valleys on either side of the crest and two half crests respectively outside the valleys for forming said four projecting tie parts.
A method of manufacturing a refuse bag used for storing and/or transporting material such as garbage or refuse prior to collection or transport to disposal comprising welding front and rear panels of material with straight end welds that join the panels together at suitably spaced locations for forming a rectangular unit comprising said front and rear panels;
cutting the material at each weld, and cutting the unit to effect a separating cut which will form open ends respectively for two bags, said open ends extending generally transversely to the bags, the said separating cut being shaped to effect cut-outs at each of said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
cutting the material at each weld, and cutting the unit to effect a separating cut which will form open ends respectively for two bags, said open ends extending generally transversely to the bags, the said separating cut being shaped to effect cut-outs at each of said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
11 A method of manufacturing a refuse bag used for storing and/or transporting material such as garbage or refuse prior to collection or transport to disposal comprising extruding a length of tubing of plastics material;
laying the tubing flat to form a front portion upon a rear portion, the said portions being connected together along side edges;
welding the front and rear portions with straight welds that join the panels together at suitably spaced locations transversely to said side edges, for forming rectangular units comprising front and rear panels having sides defined by said side edges and said welds;
cutting the tubing at each weld, and cutting the tubing to effect a separating cut for forming open ends respectively for two bags between a pair of said sides, said separating cut extending generally transversely to the bag and being shaped to effect cut-outs at each of said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
laying the tubing flat to form a front portion upon a rear portion, the said portions being connected together along side edges;
welding the front and rear portions with straight welds that join the panels together at suitably spaced locations transversely to said side edges, for forming rectangular units comprising front and rear panels having sides defined by said side edges and said welds;
cutting the tubing at each weld, and cutting the tubing to effect a separating cut for forming open ends respectively for two bags between a pair of said sides, said separating cut extending generally transversely to the bag and being shaped to effect cut-outs at each of said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
12. A method of manufacturing a refuse bag used for storing and/or for transporting material such as garbage or refuse prior to collection or transport to disposal, comprising:
joining front and rear rectangular panels of plastics material together to form a rectangular unit comprising said front and rear panels having four sides, and cutting said unit remote from one of said sides to form an open end of a bag, said cutting being such as to include cut-outs in said panels for leaving four projecting tie parts which are capable of being tied together by hand to close the open end.
joining front and rear rectangular panels of plastics material together to form a rectangular unit comprising said front and rear panels having four sides, and cutting said unit remote from one of said sides to form an open end of a bag, said cutting being such as to include cut-outs in said panels for leaving four projecting tie parts which are capable of being tied together by hand to close the open end.
13. A method of manufacturing a refuse bag used for storing and/or for transporting material such as garbage or refuse prior to collection or transport to disposal, comprising:
joining front and rear rectangular panels of plastics material together to form a rectangular unit comprising said front and rear panels, and cutting said unit to form an open end of a bag, said cutting being such as to include cut-outs in said panels for leaving four projecting tie parts which in the bag are capable of being tied together by hand to close the open end.
joining front and rear rectangular panels of plastics material together to form a rectangular unit comprising said front and rear panels, and cutting said unit to form an open end of a bag, said cutting being such as to include cut-outs in said panels for leaving four projecting tie parts which in the bag are capable of being tied together by hand to close the open end.
14. A method of manufacturing a refuse bag used for storing and/or for transporting material such as garbage or refuse prior to collection or transport to disposal comprising:
superposing a front rectangular panel upon a back rectangular panel and joining said panels to form an area which is connected at its edges; and irregularly cutting the panels transversely to a pair of said edges to effect a separating cut to form open ends respectively for two bags defined within said area, said separating cut being shaped to effect cut-outs in each of said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
superposing a front rectangular panel upon a back rectangular panel and joining said panels to form an area which is connected at its edges; and irregularly cutting the panels transversely to a pair of said edges to effect a separating cut to form open ends respectively for two bags defined within said area, said separating cut being shaped to effect cut-outs in each of said open ends to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the open end.
15. A method of manufacturing a refuse bag used for storing and/or for transporting material such as garbage or refuse prior to collection or transport to disposal, comprising extruding a tube of plastics material;
laying said tube flat and welding the tube together transversely to the direction of extrusion to form an area beteen two pairs of parallel sides including a front rectangular panel upon a back rectangular panel;
irregularly cutting the panels transversely to a pair of said sides of said rectangular panels to effect a separating cut to form open ends respectively for two bags defined within said area, said separating cut being shaped to effect cut-outs in the said open ends of each bag to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the opening.
laying said tube flat and welding the tube together transversely to the direction of extrusion to form an area beteen two pairs of parallel sides including a front rectangular panel upon a back rectangular panel;
irregularly cutting the panels transversely to a pair of said sides of said rectangular panels to effect a separating cut to form open ends respectively for two bags defined within said area, said separating cut being shaped to effect cut-outs in the said open ends of each bag to leave four projecting tie parts which in each bag are capable of being tied together by hand to close the opening.
16. A method of manufacturing a refuse bag used for storing and/or for transporting material such as garbage or refuse prior to collection or transport to disposal, comprising extruding a tube of plastics material;
laying said tube flat and welding the tube together transversely to the direction of extrusion to form an area between two pairs of parallel sides inclduing a front rectangular panel upon a back rectangular panel; and cutting the panels transversely to a pair of said sides of said rectangular panels to effect a separating cut to form an open end for a bag defined within said area;
said separating cut being shaped to effect cut-outs in the said open end to leave four projecting tie parts which in said bag are capable of being tied together by hand to close the open end.
laying said tube flat and welding the tube together transversely to the direction of extrusion to form an area between two pairs of parallel sides inclduing a front rectangular panel upon a back rectangular panel; and cutting the panels transversely to a pair of said sides of said rectangular panels to effect a separating cut to form an open end for a bag defined within said area;
said separating cut being shaped to effect cut-outs in the said open end to leave four projecting tie parts which in said bag are capable of being tied together by hand to close the open end.
17. A method of manufacturing a plastic refuse bag used for storing and/or transporting material, comprising:
cutting an extruded plastic tube while said tube is in a lay flat condition to effect a rectangular length of material comprising at least a pair of bags along said length including effecting open ends for each of the bags in said pair by effecting a single separating cut transverse to said length, said single separating cut including irregularly cutting to effect at each of said open ends four projecting tie parts which are capable of being tied together by hand to close the open end of a respective one of said pair of bags.
cutting an extruded plastic tube while said tube is in a lay flat condition to effect a rectangular length of material comprising at least a pair of bags along said length including effecting open ends for each of the bags in said pair by effecting a single separating cut transverse to said length, said single separating cut including irregularly cutting to effect at each of said open ends four projecting tie parts which are capable of being tied together by hand to close the open end of a respective one of said pair of bags.
18. A refuse bag used for storing and/or for transporting material such as garbage or refuse prior to collection or transport to disposal, comprising:
front and rear panels joined directly to each other along three straight sides and being open on the fourth side, the fourth side of each of said front and rear panels being shaped with one of (1) two spaced valleys with a projection in between and (2) two spaced projections with a valley in between so that when the open side is opened, there are four tie-parts of sufficient length to be tied together by hand to close the said fourth side.
front and rear panels joined directly to each other along three straight sides and being open on the fourth side, the fourth side of each of said front and rear panels being shaped with one of (1) two spaced valleys with a projection in between and (2) two spaced projections with a valley in between so that when the open side is opened, there are four tie-parts of sufficient length to be tied together by hand to close the said fourth side.
19. A refuse bag as claimed in claim 18 wherein the said fourth side is shaped in the form of a part of a sinusoidal wave.
20. A refuse bag used for storing and/or for transporting material such as garbage or refuse prior to collection or transport to disposal, comprising:
front and rear panels joined to each other along three straight sides and being open on the fourth side, the fourth side of each of said front and rear panels being shaped with one of (1) two spaced valleys with a projection in between and (2) two spaced projections with a valley in between so that when the open side is opened, there are four tie-parts of sufficient length to be tied together by hand to close the said fourth side.
front and rear panels joined to each other along three straight sides and being open on the fourth side, the fourth side of each of said front and rear panels being shaped with one of (1) two spaced valleys with a projection in between and (2) two spaced projections with a valley in between so that when the open side is opened, there are four tie-parts of sufficient length to be tied together by hand to close the said fourth side.
21. A roll of tubular plastics material from which is formed a plurality of refuse bags used for storing and/or transporting material such as garbage or refuse prior to collection or transport to disposal comprising:
(a) front and rear panels of material;
(b) straight end welds that weld the panels together at suitably spaced locations, transversely to the direction of the cut;
(c) an end cut adjacent to each end weld, and (d) a transverse separating cut forming an open end for two refuse bags between two pairs of end welds, the said separating cut being so shaped that four cut-outs are formed in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening whereby each bag has a capacity substantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than such a rectangular refuse bag.
(a) front and rear panels of material;
(b) straight end welds that weld the panels together at suitably spaced locations, transversely to the direction of the cut;
(c) an end cut adjacent to each end weld, and (d) a transverse separating cut forming an open end for two refuse bags between two pairs of end welds, the said separating cut being so shaped that four cut-outs are formed in the said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening whereby each bag has a capacity substantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than such a rectangular refuse bag.
22. A roll of tubular material from which is formed a plurality of refuse bags used for storing and/or transporting materials such as garbage or refuse prior to collecton for or transport to disposal comprising:
(a) front and rear panels of material lying flat one on the other and having side edges at which they are joined;
(b) pairs of closely spaced straight end welds that join the panels together at suitably spaced locations, transversely to the said edges;
(c) a set of perforations extending across the roll between each set of end welds; and (d) a line of perforations extending transversely across the roll midway between two adjacent pairs of end welds to form an open end for two contiguous refuse bags between a pair of end welds, the said set of perforations being so shaped that when the material of the roll is torn along the said line of perforations, four cut-outs are formed in said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening whereby each bag has a capacity substantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than a rectangular refuse bag.
(a) front and rear panels of material lying flat one on the other and having side edges at which they are joined;
(b) pairs of closely spaced straight end welds that join the panels together at suitably spaced locations, transversely to the said edges;
(c) a set of perforations extending across the roll between each set of end welds; and (d) a line of perforations extending transversely across the roll midway between two adjacent pairs of end welds to form an open end for two contiguous refuse bags between a pair of end welds, the said set of perforations being so shaped that when the material of the roll is torn along the said line of perforations, four cut-outs are formed in said open ends to leave four projecting tie parts which in each bag are capable of being tied together to close the opening whereby each bag has a capacity substantially equal to a rectangular refuse bag having no tie parts and is formed by substantially less bag forming material than a rectangular refuse bag.
23. A roll of tubular plastics material as claimed in claim 21 in which the said line of perforations is generally sinusoidal and comprises a complete crest, two valleys, one on either side of the crest, and two half crests respectively outside the valleys so that both bags formed by tearing along the said sinusoidal line of perforations will have four tie parts.
24. A roll of tubular plastics material as claimed in claim 21 in which the said transverse separating cut is generally sinusoidal and comprises a complete crest, two valleys one on either side of the crest and two half crests respectively outside the valleys so that both bags formed by tearing along the said sinusoidal cut will have four tie parts.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA86/9414 | 1986-07-15 | ||
| ZA865477 | 1986-07-23 | ||
| ZA86/5477 | 1986-07-23 | ||
| ZA869414 | 1986-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1293633C true CA1293633C (en) | 1991-12-31 |
Family
ID=27137278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000542767A Expired - Lifetime CA1293633C (en) | 1986-07-23 | 1987-07-22 | Bags |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4890736A (en) |
| EP (1) | EP0254256B1 (en) |
| AU (1) | AU611639C (en) |
| CA (1) | CA1293633C (en) |
| DE (1) | DE3789472T2 (en) |
| ES (1) | ES2050652T3 (en) |
| HK (1) | HK144096A (en) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246110A (en) * | 1986-07-15 | 1993-09-21 | Greyvenstein Lourence C J | Refuse bags and methods of manufacture thereof |
| GB8708658D0 (en) * | 1987-04-10 | 1987-05-13 | Ball G C | Closable bag |
| GB2208843A (en) * | 1987-08-19 | 1989-04-19 | Flexible Bag Manufacturing Com | Flexible refuse bags |
| JPH02125721A (en) * | 1988-05-13 | 1990-05-14 | Lourence C J Greyvenstein | Perforation material with continuous shape |
| GB9222933D0 (en) * | 1991-11-04 | 1992-12-16 | Greyvenstein Lourence C J | Refuse bags |
| US5722220A (en) * | 1993-04-21 | 1998-03-03 | Greenland; Deenya | Apparatus and method for containing material |
| US5497913A (en) * | 1993-12-15 | 1996-03-12 | Denny D. Baker | Mixing bag arrangement and method |
| US5683340A (en) * | 1995-02-23 | 1997-11-04 | Tenneco Plastics Company | Method of making easy open thermoplastic bag |
| US5611627A (en) * | 1995-02-23 | 1997-03-18 | Tenneco Packaging | Easy open thermoplastic bag |
| US5720557A (en) * | 1996-03-01 | 1998-02-24 | Reynolds Consumer Products, Inc. | Tack and tie bags |
| GB2311239B (en) * | 1996-03-19 | 2000-04-12 | Glacier Metal Co Ltd | Centrifugal liquid cleaning arrangement |
| US5709641A (en) * | 1996-03-26 | 1998-01-20 | Tenneco Packaging Inc. | Thermoplastic bag structure |
| EP0974526B1 (en) * | 1998-07-18 | 2003-07-30 | Karl-Heinz Hofrichter | Blocks of baglets made of thermoplastic material film and method for their manufacturing |
| US6139186A (en) | 1998-10-07 | 2000-10-31 | First Brands Corporation | Bag having improved tie features |
| US6394652B2 (en) * | 1999-06-18 | 2002-05-28 | The Procter & Gamble Company | Flexible bags having stretch-to-fit conformity to closely accommodate contents in use |
| US6394651B2 (en) | 1999-06-18 | 2002-05-28 | The Procter & Gamble Company | Flexible bags having enhanced capacity and enhanced stability in use |
| US20030053720A1 (en) * | 2001-09-18 | 2003-03-20 | Sol Smith | Continuous strip of plastic bags, method and apparatus for making same, and novel plastic bag constructions |
| AUPR886901A0 (en) * | 2001-11-14 | 2001-12-06 | International Consolidated Business Pty Ltd | Bags |
| US20050220375A1 (en) * | 2002-02-27 | 2005-10-06 | Thomas Toby R | Pakages with active agents |
| US7497623B2 (en) * | 2002-02-27 | 2009-03-03 | Pactiv Corporation | Packages with active agents |
| US20060286356A1 (en) * | 2002-02-27 | 2006-12-21 | Thomas Toby R | Web materials with active agent |
| AU2003217768A1 (en) * | 2002-02-27 | 2003-09-09 | Pactiv Corporation | Thermoplastic bags or liners and methods of making the same |
| US20040028853A1 (en) * | 2002-08-07 | 2004-02-12 | Jackson Valerie D. | Disposable covering for planar articles with integral, bag-like refuse receptacle |
| CA2548337A1 (en) * | 2003-12-10 | 2005-07-07 | Pactiv Corporation | Disposable portable bags and dispenser pouch |
| CA2635264A1 (en) * | 2005-12-30 | 2007-07-12 | The Glad Products Company | Tear resistant bag |
| US7942577B2 (en) * | 2006-12-12 | 2011-05-17 | The Procter & Gamble Company | Flexible bag having a drawtape closure |
| US20080187254A1 (en) * | 2007-02-06 | 2008-08-07 | Poly-America, L.P. | High capacity lobed plastic bags |
| US20080292222A1 (en) * | 2007-05-21 | 2008-11-27 | The Glad Products Company | Disposal bag having embossed tie flaps |
| US8534488B1 (en) * | 2011-05-27 | 2013-09-17 | Thomas D. Naum | Trash container liner bag |
| US20130279831A1 (en) | 2012-04-18 | 2013-10-24 | Texas Ice Express, LLC | Bag closure construction |
| US20140216969A1 (en) * | 2013-02-04 | 2014-08-07 | Gabe Cherian | Edg1 easy open edge |
| US10414547B2 (en) * | 2014-12-04 | 2019-09-17 | API Industries, Inc. | Flap tie bag |
| US9487334B2 (en) | 2015-03-17 | 2016-11-08 | Poly-America, L.P. | Method of forming polymeric bags |
| USD906124S1 (en) | 2019-03-20 | 2020-12-29 | Reynolds Consumer Products LLC | Top portion of a bag |
| USD900628S1 (en) | 2019-04-23 | 2020-11-03 | Checker Food Products Company | Plastic bag with perforations |
| USD900627S1 (en) | 2019-04-23 | 2020-11-03 | Checker Food Products Company | Plastic bag with perforations |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3931886A (en) * | 1970-03-17 | 1976-01-13 | Akira Yamauchi | Inner bag for containers |
| US3774838A (en) * | 1971-10-12 | 1973-11-27 | E Christie | Plastic bag construction |
| US3961743A (en) * | 1974-07-22 | 1976-06-08 | Hollowell John R | Plastic bag and method of manufacture |
| US4345712A (en) * | 1980-09-24 | 1982-08-24 | Gim Heung S | Plastic bag |
| US4445230A (en) * | 1982-06-17 | 1984-04-24 | Spadaro Giorgio I | Bag with integral closure tie |
| CA1182787A (en) * | 1982-07-20 | 1985-02-19 | James H. Martin | Integral tie closure - tie handle plastic bag |
-
1987
- 1987-07-20 ES ES87110488T patent/ES2050652T3/en not_active Expired - Lifetime
- 1987-07-20 DE DE3789472T patent/DE3789472T2/en not_active Expired - Lifetime
- 1987-07-20 EP EP87110488A patent/EP0254256B1/en not_active Expired - Lifetime
- 1987-07-22 CA CA000542767A patent/CA1293633C/en not_active Expired - Lifetime
- 1987-07-22 AU AU76025/87A patent/AU611639C/en not_active Expired
-
1989
- 1989-06-13 US US07/366,309 patent/US4890736A/en not_active Expired - Lifetime
-
1996
- 1996-08-01 HK HK144096A patent/HK144096A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3789472T2 (en) | 1994-07-28 |
| AU611639C (en) | 2002-08-08 |
| AU7602587A (en) | 1988-01-28 |
| US4890736A (en) | 1990-01-02 |
| DE3789472D1 (en) | 1994-05-05 |
| AU611639B2 (en) | 1991-06-20 |
| HK144096A (en) | 1996-08-09 |
| EP0254256B1 (en) | 1994-03-30 |
| ES2050652T3 (en) | 1994-06-01 |
| EP0254256A1 (en) | 1988-01-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |