| Patents for B31B 37 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness of contents, from webs, e.g. from tubular webs (684) |
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| 06/13/1990 | CN1008338B Device for folding side edge of plastic film sack |
| 06/06/1990 | CN2057891U Automatic edge-folding machine for paper bag |
| 05/15/1990 | US4925438 Bags made of a thermoplastic synthetic resin sheeting and process for the production of said bags |
| 09/27/1989 | EP0334242A1 Stand-up plastic bag and method of making same |
| 07/18/1989 | US4849040 Method and apparatus for high speed pouch and bag making |
| 07/18/1989 | CA1257569A1 Bag and method of manufacturing the same |
| 06/07/1989 | EP0319048A2 Process and apparatus for making shrinkable sleeves |
| 06/06/1989 | US4837849 Stand-up plastic bag and method of making same |
| 03/28/1989 | US4816104 Methods and systems for preparing flat-bottom thermoplastic sack |
| 03/14/1989 | CA1251179A1 Thermoplastic bag, method and system for its manufacture |
| 02/21/1989 | CA1250172A1 Method for preparing flat-bottom thermoplastic sack |
| 01/31/1989 | CA1249471A1 Methods for preparing flat-bottom thermoplastic sack and systems therefore |
| 12/20/1988 | CA1246919A1 Apparatus for gusseting tubular plastic films |
| 12/13/1988 | US4790803 Method of making bottom gusset bag pad arrangement for liquid containers |
| 11/29/1988 | CA1245499A2 Apparatus for making quadruple profile plastic tubing for bags |
| 11/22/1988 | CA1245090A1 Method for preparing flat-bottom thermoplastic sack and systems therefor |
| 11/08/1988 | US4783178 Method of manufacturing a web of plastic bags |
| 11/08/1988 | CA1244384A1 Flat bottom plastic bag and method of manufacture |
| 09/06/1988 | US4769126 Bottom gusset bag pad arrangement for liquid containers |
| 09/06/1988 | US4769125 One side fastened; tear away |
| 03/15/1988 | US4730943 Plastic bag with carrying handle |
| 01/26/1988 | US4721396 Bag and method of manufacturing the same |
| 01/05/1988 | US4717262 Flat bottom plastic bag and method of making same |
| 04/15/1987 | EP0217982A1 A thermoplastic bag, method and system for its manufacture |
| 04/07/1987 | US4655737 Method for preparing flat-bottom thermoplastic sack |
| 03/25/1987 | EP0215163A1 Methods for preparing flat-bottom thermoplastic sack and systems therefor |
| 03/25/1987 | EP0215083A1 Method for fabricating bags made of flexible material, particularly plastic, device for implementing such method and bags obtained thereby |
| 03/24/1987 | US4652253 Method for preparing flat-bottom thermoplastic sack |
| 03/17/1987 | US4650406 Apparatus for forming gussets in a tubular plastic film |
| 01/13/1987 | US4636190 Apparatus for manufacturing a web of plastic bags |
| 11/05/1986 | CN86102972A Method of forming flat-bottom thermoplastic sack |
| 10/29/1986 | EP0199508A2 Method for preparing flat-bottom thermoplastic sack |
| 10/29/1986 | CN85108590A Device for folding side edge of plastic film sack |
| 09/25/1986 | WO1986005442A1 Method for fabricating bags made of flexible material, particularly plastic, device for implementing such method and bags obtained thereby |
| 06/04/1986 | EP0183244A1 Apparatus for forming gussets in tubular plastic films |
| 03/05/1986 | EP0173506A2 Methods for preparing a stack of thermoplastic sacks |
| 02/18/1986 | US4571235 Methods for preparing flat-bottom thermoplastic sack and systems therefore |
| 01/28/1986 | US4566927 Continuous driving of elongated web, printing, and cutting |
| 12/24/1985 | US4561107 Web of plastic bags |
| 12/11/1985 | EP0163755A1 Square ended bag |
| 11/19/1985 | US4554192 Grocery sacks |
| 11/19/1985 | CA1196848A1 Method and apparatus for high speed pouch and bag making |
| 11/13/1985 | EP0161098A2 A thermoplastic bag, method and system for its manufacture |
| 10/08/1985 | CA1194718A1 Apparatus for pulling tube ends open to form base squares of cross-bottom sacks |
| 07/23/1985 | CA1190780A1 Method and apparatus for making bag-type packages |
| 07/02/1985 | US4526565 Method of making flat bottom plastic bag |
| 06/18/1985 | US4524459 Square ended bag |
| 05/22/1985 | EP0142457A2 Method of shaping the bottom of a bag of flexible synthetic material starting from a cushion filled with a liquid |
| 05/22/1985 | EP0142456A2 Method of shaping the bottom of a bag of flexible material starting from a cushion filled with a liquid |
| 01/15/1985 | US4493686 Apparatus for pulling tube ends open to form base squares of cross-bottom sacks |
| 09/05/1984 | EP0117730A2 Flat bottom plastic bag and method of manufacture |
| 07/10/1984 | CA1170488A1 Handle bag making apparatus |
| 06/12/1984 | US4453370 Square ended bag |
| 06/05/1984 | US4452597 Method and apparatus for forming stacks of sacks |
| 05/29/1984 | US4451308 Method and device for making seals in tubular web provided with side gussets |
| 05/15/1984 | US4448010 Method and apparatus for making bag-type packages |
| 11/29/1983 | CA1157825A1 Web comprising a plurality of plastics bags, having two block bottoms |
| 11/02/1983 | EP0092865A1 Method and device for making seals in tubular web provided with side gussets |
| 06/07/1983 | US4386924 Handle bag making apparatus |
| 02/22/1983 | CA1141717A1 Paperbag having articulated handle |
| 11/23/1982 | CA1136097A1 Tubular preform for packaging containers |
| 11/10/1982 | EP0064321A1 A web of a plurality of interconnected bags, a bag obtained from this web and a method of manufacturing said web and apparatus for executing said method |
| 09/14/1982 | CA1131534A1 Method and apparatus for producing a support package |
| 09/08/1982 | EP0059420A1 Method and means for manufacturing stacks of bags |
| 05/26/1982 | EP0052151A1 Ply-bottom bag and apparatus for making it |
| 04/20/1982 | CA1122171A2 Square bottom bag and method of making same |
| 01/19/1982 | CA1116563A1 Method and apparatus for manufacturing a bag and delivering a bag in an open configuration to a checkout counter |
| 05/12/1981 | US4266469 Method for making sacks provided with cross-bottoms |
| 01/07/1981 | EP0021463A1 Method of producing a web of a plurality of interconnected plastics bags |
| 09/09/1980 | US4221321 Paperbag having articulated handle |
| 04/01/1980 | US4196034 Method of making a pouch usable as a cup |
| 01/22/1980 | US4184413 Apparatus for manufacturing a bag and delivering a bag in an open configuration to a check-out counter |
| 05/08/1979 | CA1053953A1 Rectangular and flat bottom bag and method of manufacture |
| 02/27/1979 | CA1049461A2 Self-standing bag |
| 02/20/1979 | CA1048834A1 Self-standing bag and production thereof |
| 09/19/1978 | US4114520 Apparatus for making bags from a continuously fed thermoplastic tubular web of film |
| 10/25/1977 | US4055109 Method and apparatus for producing self-standing bags |
| 09/06/1977 | US4046065 Rectangular and flat bottom bag and method of manufacture |
| 11/02/1976 | US3988970 Apparatus for forming flat bottom plastic bags |
| 09/14/1976 | US3980225 Self-standing bag |
| 09/07/1976 | US3978638 Package construction of articles with shrink film |
| 04/27/1976 | US3952480 Packaging apparatus |
| 03/30/1976 | US3946644 Apparatus for spreading open cross-bottoms on tubular members |
| 02/03/1976 | US3935993 Free-standing container |