| 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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| 11/20/1990 | CA1276543C Cutting thermoplastic webs |
| 11/14/1990 | EP0397099A1 Method and apparatus for manufacturing sacks |
| 11/13/1990 | US4969967 Method of manufacturing packing and strip material therefor |
| 11/08/1990 | DE4001176C1 Stepped transport and plastic film welding arrangement - has continuously advancing drive, intermittently driven roller pair, welding tools and material store |
| 11/07/1990 | EP0395721A1 Control and detection circuitry for mass airflow sensors. |
| 11/07/1990 | CN2065138U Multifunctional semi-automatic suitacase-type bag closing machine |
| 11/07/1990 | CN1046703A Method for mounting handles for graping and/or opening on bags made of soft synthetic material |
| 10/31/1990 | EP0395362A1 Method of forming recloseable packages, profiles used therein and packages produced thereby |
| 10/31/1990 | DE3906390C1 Method for producing and stacking plastic bags |
| 10/22/1990 | WO1990012684A1 Process and device for applying a carrying and/or pouring handle to a pouch of flexible synthetic material and pouch thus obtained |
| 10/22/1990 | CA2030527A1 Process and device for attaching a grip and/or pour handle toa bag made of a flexible synthetic material and bag therefrom |
| 10/18/1990 | WO1990011943A1 Envelopes |
| 10/17/1990 | EP0392878A2 Apparatus for producing suspension packs |
| 10/11/1990 | DE3911216A1 Method for producing and interlocking stacks of duplex bags made of plastic film |
| 10/10/1990 | EP0256375B1 Method and apparatus for the production of a stack of bags |
| 10/09/1990 | US4961301 Process and apparatus for the continuous manufacture of filter paper bags for infusions, provided with thread and tag |
| 10/04/1990 | WO1990011230A1 Bag with handles cut out from a reinforced region, process and installation for the production of such bag |
| 09/26/1990 | EP0388686A1 Device for handing over pieces made continuously from a flexible web |
| 09/18/1990 | US4957571 Method for applying reclosable fastener to package |
| 09/14/1990 | WO1990010584A1 Nested plastic bags, method of manufacture, and apparatus for manufacturing |
| 09/14/1990 | CA2048630A1 Nested plastic bags, method of manufacture and apparatus for manufacturing |
| 09/04/1990 | US4954033 Transfer mechanism for conveyor |
| 08/29/1990 | EP0384281A1 Device for stacking bags on pins |
| 08/14/1990 | US4948268 Plastic film bag with integral plastic film tie element, and associated fabrication methods |
| 08/09/1990 | WO1990008641A1 Wound film and method of manufacturing same |
| 08/07/1990 | US4946432 Device for sealing and perforating a thermoplastic film |
| 08/07/1990 | US4946085 Apparatus for producing paper with decorative edges |
| 07/18/1990 | EP0377834A2 Device for stacking flat objects on the stacking pins of an endless conveyor means |
| 07/18/1990 | EP0216800B1 Apparatus for producing flexible containers |
| 07/18/1990 | EP0181873B1 Easy open and reclosable package and apparatus for making same |
| 07/13/1990 | CA2007479A1 Apparatus for stacking flat workpieces on stacking pins of an endless conveying element |
| 07/12/1990 | DE4000450A1 Stacking light, plastics foil bags - feeds bags with seam to front to stacking table and grips opposite ends by vacuum bar with longitudinal axis orthogonal to travel direction |
| 07/12/1990 | DE3900503A1 Process for manufacturing and stacking plastic bags |
| 07/04/1990 | EP0376007A1 Machine for producing carrier bags with handle openings and welded-on thermoplastic reinforcement tags surrounding them |
| 06/28/1990 | WO1990006888A1 Collapsible bag with evacuation passageway and method for making the same |
| 06/28/1990 | EP0255540A4 An apparatus for attaching a fitment to a web of film. |
| 06/27/1990 | EP0375479A1 Method of manufacturing bags of supple material, particularly plastic ones, and device for realizing this |
| 06/27/1990 | CN1008518B Stacking and transportation device of sheet |
| 06/20/1990 | CA2005521A1 Collapsible bag with evacuation passageway and method for making the same |
| 06/19/1990 | US4934993 Bag making apparatus with automatic compensation system |
| 06/13/1990 | EP0268626B1 Device for setting in place mouthpieces through a perforated film and perforated film fitted with mouthpieces |
| 06/06/1990 | EP0371276A1 Device for piling flat items |
| 06/05/1990 | US4931034 Bags made from thermoplastic synthetic resin sheeting having cutoff weld seams and process for producing the bags |
| 06/05/1990 | US4931033 Plastic bag construction |
| 06/05/1990 | CA1269958A1 Side sealed thermoplastic bag |
| 05/29/1990 | US4929225 Method of making bags and bag material having hinged zipper strips |
| 05/29/1990 | CA1269557A1 Bottom seal bag making machine |
| 05/17/1990 | DE3937509A1 Plastics bag making machine - has hollow rotating arms connected to vacuum source to place bags on stack |
| 05/15/1990 | US4925439 Apparatus for stacking and possibly blocking plastic bags |
| 05/15/1990 | US4924655 Film guide system |
| 05/14/1990 | CA2002932A1 Apparatus for stacking flat articles |
| 05/08/1990 | CA1268651A1 Fusible rib bonding of fasteners to substrate |
| 05/08/1990 | CA1268650A1 Apparatus for and method of making bag material |
| 05/01/1990 | US4921746 Cellular, multi-layer material for forming a heat-insulating bag |
| 04/18/1990 | EP0363359A1 Device for depositing and stacking plastic bags with seamed lower edges |
| 04/18/1990 | CN2056124U Full automatic machine for making bag in one continuous line |
| 04/17/1990 | US4917661 Device for collecting bags or sacks |
| 04/11/1990 | EP0362904A2 Device for welding a mouth piece to a thermoplastic film |
| 04/11/1990 | EP0362740A1 Method and device for producing and conveying stacks of foil-lengths |
| 04/10/1990 | US4915680 Floating adustable gusseting wheel |
| 04/10/1990 | US4915679 Manufacturing method of pleated multilayer bag |
| 04/04/1990 | EP0361535A2 A sheet piece consisting of at least three material layers of paper |
| 03/20/1990 | US4909870 Method of and apparatus for attaching continuously running fastener strip to web substrate |
| 03/20/1990 | US4909017 In a form fill process of making bags |
| 03/15/1990 | DE3829602A1 Method and device for the production of side-fold bags (pouches) |
| 03/14/1990 | CN1040350A Sheet stacking and transferring device |
| 03/13/1990 | US4908009 Corner-forming unit of a carton container-forming machine |
| 03/07/1990 | EP0245424B1 Sealing machine for glue-coated material in sheets |
| 03/01/1990 | DE3546743C2 Thermoplastics film bags mfr. machine |
| 02/28/1990 | EP0267937B1 Device for welding and perforating a thermoplastic film backfolded on itself |
| 02/27/1990 | US4903839 Stack of bags each having congruent cutouts and perforated lines |
| 02/20/1990 | US4902269 Device for the sealing of a port or fitment on a thermoplastic film |
| 01/23/1990 | US4895611 Method and apparatus for making non-roping thermoplastic draw tape for thermplastic bags |
| 01/23/1990 | US4895556 Sealing element for angle seals and T-shirt bags |
| 01/23/1990 | US4894975 Method and apparatus for making reclosable bags with fastener strips in a form fill and seal machine |
| 01/17/1990 | CN1038786A Polymeric film materials and process for making them |
| 01/16/1990 | US4893731 Collapsible bag with evacuation passageway and method for making the same |
| 01/16/1990 | CA1264421A1 Apparatus for making bags |
| 01/10/1990 | EP0350418A1 Former for a tube with side plies |
| 01/09/1990 | US4892514 Bag and tube folding method and apparatus |
| 01/09/1990 | US4892512 Method of making reclosable flexible containers having fastener profiles affixed to exterior of bag walls |
| 01/03/1990 | EP0348823A2 Method and device for manufacturing bags with thermoplastic pull strings |
| 12/27/1989 | CN2049999U Compound packing bag automatic mouth-cutting machine |
| 12/26/1989 | US4889522 Rotary bag making machine for drawstring bags |
| 12/21/1989 | DE3913099C1 Laterally welding seams of moving plastic film - using 2 work stations with weld units that can be raised or lowered and an actuator with eccentric drives |
| 12/19/1989 | EP0277974A4 Apparatus for sealing a web of film. |
| 12/05/1989 | US4884443 Control and detection circuitry for mass airflow sensors |
| 11/28/1989 | US4883450 Process for making single side free plastic bag |
| 11/23/1989 | EP0342935A2 Manufacturing method of square bottom containers |
| 11/22/1989 | CN1037302A Full-automatic envelope machine |
| 11/21/1989 | US4881933 Draw tape bag forming method and apparatus |
| 11/21/1989 | US4881932 Method and apparatus for manufacturing plastic film bag with special flap arrangement |
| 11/21/1989 | US4881931 Hem seal for draw tape bags |
| 11/16/1989 | WO1989010837A1 Method for adjusting the step feed motion and step feed motion device for a plurality of flat thermoplastic sheaths in a plant for fabricating bags |
| 11/07/1989 | US4878987 Transverse zipper bag material and method of and means for making same |
| 11/07/1989 | US4878888 Process and apparatus for severing and subsequently stacking flat articles made of plastic film and preferably consisting of double bags |
| 11/02/1989 | WO1989010312A1 Polymeric film material and its production |
| 11/02/1989 | EP0339324A1 Snap zipper, bag with snap zipper, manufacturing method and apparatus for bag with snap zipper, and bagging method and apparatus for bag with snap zipper |
| 10/31/1989 | US4877473 Method of making a bag pack |
| 10/31/1989 | US4877233 Rotary vacuum wicketter |