| Patents for B31B 29 - Machinery characterised by making envelopes or bags with structural provision at the base for thickness or contents (576) |
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| 10/27/1992 | US5158371 Self-supporting polymer bag and method of manufacture |
| 09/23/1992 | CA2063085A1 Method for manufacturing a sack or bag with a bottom being rectangular in the filled state and with a handle, and a sack or bag manufactured in accordance with said method |
| 09/22/1992 | US5149315 Method of making lined square bottom bag |
| 09/22/1992 | US5149201 Angle sealed bottom grocery sack |
| 08/27/1992 | DE4105452A1 Machine expanding bags with folded sides and bottom - has outer mould with regions corresp. to position of formed bag with folded sides, and immersion spreader |
| 08/04/1992 | US5135464 Method for manufacturing a container |
| 05/19/1992 | CA1301111C Container and a method as well as an assembly for its manufacture |
| 04/22/1992 | EP0481137A1 Paper sheet bending apparatus in bag making machine |
| 04/14/1992 | US5104365 Paper sheet bending apparatus in bag making machine |
| 04/07/1992 | US5102383 Method of manufacturing a sack or bag with a bottom being rectangular in the filled state and a handle portion joined thereto |
| 01/02/1992 | DE4020935A1 Bag made with flat strip of material - has strip glued along edges to form longitudinal seam |
| 12/02/1991 | WO1991018797A1 Stand-up pouch having cross-seal feature and method of making |
| 11/30/1991 | CA2023046A1 Self-supporting polymer bag and method of manufacture |
| 11/13/1991 | EP0455978A1 Method for making a bag with an attached handle and in filled state a rectangular bottom |
| 11/08/1991 | CA2041196A1 Method for manufacturing a sack or bag with a bottom being rectangular in the filled state and a handle portion joined thereto |
| 11/03/1991 | WO1991017089A1 Container and method for manufacturing the same |
| 11/03/1991 | CA2082072A1 Container and method for manufacturing the same |
| 05/01/1991 | CN2076016U Movable mould for paper bag making machinery |
| 04/09/1991 | US5006186 Manufacturing method of square bottom bags |
| 03/05/1991 | US4997504 Method and apparatus for high speed pouch and bag making |
| 12/13/1990 | DE3918741A1 Bag with side folds and square dust tight base - has insert sheet projecting into base closure flaps |
| 12/11/1990 | US4976674 Bag and method of making the same |
| 05/29/1990 | US4929224 Plastic bag forming machine |
| 05/23/1990 | CN2057387U Machine for making cement paper bag |
| 04/18/1990 | EP0364373A1 Flexible container |
| 04/10/1990 | US4915679 Manufacturing method of pleated multilayer bag |
| 01/09/1990 | US4892511 Method and apparatus for the automatic manufacture of flat bottom bags |
| 11/23/1989 | EP0342935A2 Manufacturing method of square bottom containers |
| 11/21/1989 | US4881825 Container and a method as well as an assembly for its manufacture |
| 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 |
| 06/06/1989 | US4837849 Stand-up plastic bag and method of making same |
| 05/31/1989 | CN2038447U Paper cutting machine |
| 03/28/1989 | US4816104 Methods and systems for preparing flat-bottom thermoplastic sack |
| 02/14/1989 | US4804356 Apparatus for processing baglike container blanks |
| 11/22/1988 | CA1245193A1 Method for producing and filling bottom-fold bags and apparatus for execution of the method |
| 10/25/1988 | US4779998 Composite bag-like package |
| 10/13/1988 | DE3805050A1 Device for pre-folding the bag closure in packing machines |
| 10/05/1988 | EP0285036A2 A container and a method as well as an assembly for its manufacture |
| 09/21/1988 | EP0283102A2 Apparatus for processing baglike container blanks |
| 05/24/1988 | CA1236971A1 Device for spreading jointing adhesive on paper surface |
| 08/11/1987 | US4685276 Method for producing and filling bottom-fold bags and apparatus for execution of the method |
| 07/14/1987 | US4680024 Apparatus for producing bags from a tubular sheet of thermally weldable film material |
| 09/09/1986 | US4610654 Guide structure for apparatus for sack end forming apparatus |
| 03/04/1986 | US4573956 Slitter assembly for double fold bottomer apparatus |
| 01/28/1986 | US4566927 Continuous driving of elongated web, printing, and cutting |
| 09/18/1985 | EP0154873A1 Method of making and filling a bag with a folded bottom from an endless tubular material which can be made from an endless flat material, device for carrying out this method and especially a bag with a folded bottom made by this method |
| 09/12/1985 | WO1985003919A1 Method for fabricating and filling folded bottom bags, based on endless tubular material optionally formed of endless flat meterial; plant for implementing such method and particularly folded bottom bag thus fabricated |
| 04/24/1985 | EP0138028A1 Slitter assembly for double fold bottomer apparatus |
| 12/25/1984 | US4490131 Method of making bags |
| 09/27/1983 | US4406646 Method of producing self-supporting plastic bag |
| 09/06/1983 | CA1153342A1 Self-supporting plastic bag and method of producing the same |
| 04/05/1983 | CA1144197A1 Method for piling or stacking sacks or bags |
| 02/01/1983 | US4371367 Apparatus for pulling open tube sections to form base squares in the production of cross-bottom sacks |
| 07/06/1982 | US4338084 Method for piling or stacking sacks or bags |
| 02/23/1982 | US4316723 Method and apparatus for severing tube sections from tubular webs and transporting same |
| 01/19/1982 | CA1116563A1 Method and apparatus for manufacturing a bag and delivering a bag in an open configuration to a checkout counter |
| 12/15/1981 | CA1114215A1 Method for producing a flat bottom plastic bag |
| 09/08/1981 | US4288014 Dancer roll assembly |
| 07/21/1981 | US4279686 Apparatus for applying web sections to a flat-lying workpiece |
| 06/16/1981 | US4273550 Method for producing a flat bottom plastic bag |
| 05/12/1981 | US4266469 Method for making sacks provided with cross-bottoms |
| 04/28/1981 | US4264317 Method of making valved sacks provided with cross-bottoms |
| 03/24/1981 | US4258267 Method and apparatus for testing the base folds of open and finished bases formed on tube sections |
| 02/17/1981 | US4250796 Method and apparatus for making bags from tubular or semi-tubular webs |
| 02/12/1980 | CA1071663A1 Apparatus for storing articles discharged at a high rate from production machines |
| 01/22/1980 | US4184413 Apparatus for manufacturing a bag and delivering a bag in an open configuration to a check-out counter |
| 06/13/1979 | EP0002326A1 Valve sack and method of making it |
| 05/15/1979 | CA1054418A1 Block bottom bag closure |
| 12/20/1977 | US4063693 Apparatus for storing articles discharged at a high rate from production machines |
| 11/02/1976 | US3988970 Apparatus for forming flat bottom plastic bags |
| 08/17/1976 | US3974747 Machine for manufacturing square bags of thermoplastic film |
| 07/06/1976 | US3967544 Grocery sack process and machine |
| 05/25/1976 | US3958500 Bottom forming device for a bag forming machine |
| 03/30/1976 | US3946644 Apparatus for spreading open cross-bottoms on tubular members |
| 03/09/1976 | US3942416 Square bottomed bag folding apparatus |