| Patents for B31B 23 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents, from webs, e.g. from flattened tubular webs (1,472) |
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| 11/04/1980 | US4231558 Apparatus for accumulating articles such as bags |
| 10/28/1980 | US4230029 Cutting assembly useful in bag machines |
| 08/12/1980 | US4216639 Process of making containers made of thin pliable synthetic material |
| 07/29/1980 | US4214509 Method and apparatus for manufacturing bags of a continuous web of a thermoplastic synthetic sheet material |
| 07/29/1980 | CA1082508A1 Tear resistant separable end-connected bags |
| 07/01/1980 | US4210480 Steam seal of bag ply |
| 06/17/1980 | CA1079697A1 Integral extruded construction for bags and method of making same |
| 06/10/1980 | US4207136 Welding machine for thermoplastic web |
| 06/03/1980 | US4205504 Method and device for making envelopes from a continuous web and including the stuffing and sealing of those envelopes |
| 05/20/1980 | CA1077758A1 Flexible envelopes |
| 05/14/1980 | EP0010649A1 A machine for the manufacture of bags from plastics material with a continuously rotating welding roller |
| 05/06/1980 | CA1076868A1 Piercing blade temperature control |
| 04/29/1980 | CA1076531A1 Composite bag for hard crusted bakery products |
| 04/15/1980 | US4198259 Apparatus for the manufacture of bags |
| 04/01/1980 | US4195960 Conveyor with downward step for stacked sheets of film material |
| 04/01/1980 | CA1074685A1 Packaging machine |
| 02/12/1980 | US4187769 Apparatus for folding box blanks |
| 01/01/1980 | US4181069 Method for producing double streams of side-welded bags in heat-welded pad form |
| 12/04/1979 | CA1067324A1 Plastics bags production |
| 11/27/1979 | US4176000 Apparatus for making chains of sacks |
| 11/13/1979 | US4173922 Method for making side seam envelopes from a web |
| 10/23/1979 | CA1064663A1 Method for manufacturing of packaging-container blanks |
| 10/16/1979 | US4170927 Apparatus for depositing lengths of foil material |
| 09/19/1979 | EP0003998A2 Machine for working a web of material by a welding tool |
| 09/11/1979 | CA1062208A1 Packaging bag of thermoplastic synthetic plastic film and a method of fabrication |
| 08/14/1979 | US4164170 Method of making bags |
| 06/27/1979 | EP0002538A2 Process for making an interconnected series of bags and apparatus for carrying out this process |
| 04/17/1979 | CA1052605A1 Control for bag making machine |
| 02/20/1979 | US4140046 Piercing blade temperature control |
| 01/16/1979 | CA1046604A1 Automatic flat width control |
| 01/02/1979 | CA1045589A1 Plastic bag for packaging fresh red meat and method for making the same |
| 12/05/1978 | US4128049 Apparatus for manufacture of pad stacked bags or the like |
| 10/31/1978 | CA1041463A1 Packing of the folding bag type |
| 10/17/1978 | US4120716 Method of applying printed labels to flexible envelopes using corona discharge treatment |
| 10/10/1978 | US4119452 Method of coating and cutting wrapper blanks |
| 09/19/1978 | US4115183 Apparatus for making bags from a two-ply web of thermoplastic material |
| 09/19/1978 | US4114520 Apparatus for making bags from a continuously fed thermoplastic tubular web of film |
| 08/08/1978 | US4105489 Apparatus for making bottom seal thermoplastic bags |
| 07/18/1978 | US4101369 Bottom seal cut-off |
| 07/18/1978 | US4101363 Method of making bottom seal thermoplastic bags |
| 07/11/1978 | US4099666 Composite bag for hard crusted bakery products |
| 05/30/1978 | USRE29644 Bag forming machines |
| 04/11/1978 | US4083747 Apparatus for making stacks of plastics bags |
| 12/27/1977 | US4065344 Bag forming method and apparatus |
| 12/27/1977 | US4064776 Apparatus for making tear resistant separable end-connected bags |
| 12/13/1977 | US4062271 Apparatus for stacking bags |
| 12/06/1977 | US4061458 Apparatus for processing a web of material without a standstill |
| 12/06/1977 | US4061260 Bag making machine |
| 11/22/1977 | US4059478 Apparatus for bonding layers of resinous material |
| 09/06/1977 | US4046257 Pad-stacked bags or similar packaging, and apparatus and method for fabricating the same from plastic film |
| 05/17/1977 | US4023470 Method and apparatus for continuous production of bags from thermoplastic film |
| 04/26/1977 | US4019947 Multipurpose sealing and severing method and mechanism |
| 04/12/1977 | US4016806 Method and apparatus for making transverse closure seals in composite thermoplastic bag stock |
| 04/12/1977 | US4016805 Method for the manufacture of dunnage bag liners |
| 04/05/1977 | US4015771 Packaging bag of thermoplastic synthetic plastic film |
| 01/11/1977 | US4002519 Plastic film |
| 12/21/1976 | US3998135 Bag structure and method of producing |
| 11/23/1976 | US3992981 Web stripping apparatus |
| 11/16/1976 | US3992107 Automatic flat width control |
| 10/05/1976 | US3983794 Multistep transverse welding process for producing bags from plastic sheets |
| 09/28/1976 | US3982473 Envelope-making method |
| 09/21/1976 | US3981230 Apparatus for thermally machining thermoplastics sheet |
| 09/14/1976 | US3980516 Side weld plastic bag manufacturing machine |
| 07/27/1976 | US3971299 Manufacture of bags |
| 06/29/1976 | US3966524 From thermoplastic film |
| 05/04/1976 | US3954371 Apparatus for making bags from synthetic plastic film |
| 05/04/1976 | US3954213 Turn bar apparatus and method for web fed envelope machine |
| 05/04/1976 | US3954049 Method of making flexible bag |
| 04/20/1976 | US3951050 Tube forming process |
| 03/30/1976 | US3947198 Apparatus for making bags from synthetic plastic film |
| 02/17/1976 | US3938658 Sterile pouch |
| 02/03/1976 | US3935799 Apparatus for making envelopes with broad or pointed closures from a paper web |