| Patents for B31B 19 - Machinery characterised by making rectangular envelopes or bags of flat form, i.e. without structural provision at the base for thickness of contents (4,853) |
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| 11/22/1977 | US4059478 Apparatus for bonding layers of resinous material |
| 11/22/1977 | US4059044 Apparatus for forming and taking away packets of bags |
| 10/25/1977 | US4055111 Envelope machine |
| 10/25/1977 | US4055032 Process for forming sealed liquid filled bags |
| 09/06/1977 | US4046257 Pad-stacked bags or similar packaging, and apparatus and method for fabricating the same from plastic film |
| 07/19/1977 | US4036115 Sack making equipment |
| 06/28/1977 | US4031815 Handle forming apparatus |
| 06/21/1977 | US4030956 Method of manufacturing plastic bags in a continuous way |
| 06/21/1977 | US4030652 Equalizing device for movements in packing machines, especially machines for making bags and the like |
| 06/07/1977 | US4027577 Bag-making apparatus and process for making ported bags |
| 05/17/1977 | US4024010 Plastic layers, sealing |
| 05/17/1977 | US4023607 Polyethylene urine bag with tube |
| 05/03/1977 | US4021291 Automatic hot needle attachment for bag wicketer |
| 04/19/1977 | US4018142 Box-bag with permanently secured handle |
| 04/12/1977 | US4017020 Nozzle outlet in the stretchable flexible wall for a container |
| 04/12/1977 | US4016808 Method and apparatus for making expansible gusset envelopes |
| 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 |
| 04/12/1977 | US4016789 Drive for rotatable cutter mechanisms |
| 03/29/1977 | US4014252 Method of manufacturing bags |
| 03/15/1977 | US4011978 Plastic bag machine |
| 03/08/1977 | US4010786 Sealed container |
| 02/22/1977 | US4008650 Method and apparatus for forming expansible envelope |
| 02/15/1977 | US4007669 Apparatus for reversing the running direction of tube sections in sack machines |
| 01/18/1977 | US4003782 Apparatus for producing a package of imbricated bags |
| 01/18/1977 | US4003298 Apparatus for driving moving webs in bag making machines |
| 12/28/1976 | US4000029 Cutting and sealing apparatus |
| 12/21/1976 | US3998137 Envelope making machine |
| 11/23/1976 | USRE29043 Method and apparatus for manufacturing synthetic resin bags having occludent means in the inside surface thereof |
| 11/09/1976 | US3990354 Envelope making apparatus |
| 10/26/1976 | US3988184 Method for applying closure strips to plastic film |
| 10/05/1976 | US3984047 Reinforced thin wall plastic bag |
| 09/28/1976 | US3982472 Envelope machine with window patch removal mechanism |
| 09/14/1976 | US3980225 Self-standing bag |
| 08/24/1976 | US3976418 Apparatus for gusseting continuous lengths of tubular material |
| 07/20/1976 | US3970503 Method of manufacturing a bag |
| 06/29/1976 | US3966524 From thermoplastic film |
| 06/08/1976 | US3962023 Apparatus for applying handles to plastic bags |
| 06/01/1976 | US3960641 Means for applying labels to a sheet material length |
| 06/01/1976 | US3960062 Method of making a band of plastic bags |
| 05/18/1976 | US3957570 Machinery for patching envelopes and the like |
| 05/11/1976 | US3956045 Method and apparatus for bonding layers of resinous material |
| 05/04/1976 | US3954367 Stacking wheels with superimposed retarder action |
| 05/04/1976 | US3954049 Method of making flexible bag |
| 04/13/1976 | US3949631 Punching holes in thin sheet material |
| 04/06/1976 | US3948711 Method and apparatus for making dispensers |
| 04/06/1976 | US3948705 Method for making multiple plastic bags with reclosable fasteners thereon |
| 03/30/1976 | US3947307 Thermoplastic resins, ultrasonic welding |
| 03/23/1976 | US3945872 Extrusion |
| 03/09/1976 | US3942694 Bag severing machine |
| 02/24/1976 | US3939723 Drive for rotatable cutter mechanisms |
| 02/17/1976 | US3938658 Sterile pouch |
| 01/13/1976 | US3932257 Mechanism for making a flexible closure |