| Patents for B29C 53 - Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor (13,374) |
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| 07/08/1981 | EP0031468A1 Insulating envelope of cellular plastic and process for its production |
| 07/07/1981 | US4277302 Apparatus for advancing sheet material |
| 06/30/1981 | US4276109 Thermoplastic and nonthermoplastic fibers |
| 06/30/1981 | CA1104073A1 Corrugated tubing with variable depth corrugations and method of making the same |
| 06/23/1981 | US4274244 Method and apparatus for sealing polyester film in mine bolt capsule |
| 06/23/1981 | CA1103746A1 Fusion fixing apparatus employing heat and pressure |
| 06/23/1981 | CA1103598A1 Dual wire hose |
| 06/16/1981 | US4273601 Method for the production of elongated resin impregnated filament composite structures |
| 06/16/1981 | US4273549 Process for making multi-walled plastic bag |
| 06/16/1981 | US4273523 Sweep ell production apparatus |
| 06/16/1981 | CA1103139A1 Composite strip, a process for the manufacture thereof and a process for producing a sterile package including the composite strip |
| 06/09/1981 | US4272309 Polymer, curing, collapsing |
| 06/09/1981 | US4272235 Method and apparatus for folding and sealing a floppy disc envelope |
| 06/09/1981 | CA1102672A1 Production of reinforced plastic pipes |
| 06/09/1981 | CA1102531A1 Method and apparatus for reversing and flattening a driver's restraint cushion |
| 05/26/1981 | US4269357 Continuous drip irrigation tube |
| 05/26/1981 | CA1101810A1 Ultrasonic welding of web-seam closures for folding boxes |
| 05/26/1981 | CA1101738A1 Method and apparatus for lining can ends |
| 05/20/1981 | EP0028862A1 Method and apparatus for forming a plate with at least one profiled border |
| 05/19/1981 | US4268555 Wide-folding hinge |
| 05/19/1981 | US4268346 Apparatus for making tank top bags from a web of tubular plastics film provided with side folds |
| 05/19/1981 | CA1101323A1 Method and apparatus for fabricating thermoplastic containers |
| 05/14/1981 | WO1981001263A1 Method and apparatus for forming a plate with at least one profiled border |
| 05/12/1981 | US4267139 Reinforced plastic belt loop |
| 05/12/1981 | US4267137 Method for molding sheet material with parallel ribs on one side |
| 05/12/1981 | US4267007 Winding apparatus for the manufacture of filament-wound, reinforced resinous products |
| 05/12/1981 | CA1100731A1 Molded rubber article and method |
| 05/05/1981 | US4265842 Method of forming a corner in a thermoplastic material using ultrasonic vibrations |
| 05/05/1981 | US4265607 Apparatus for manufacturing a plastic insulator equipped with helical-shaped shields |
| 05/05/1981 | CA1100399A1 Method of and device for fabricating plastic sleeves |
| 05/05/1981 | CA1100398A1 Process and apparatus for the production of a pipe- shaped hollow body especially of container tubes from a multilayer composite sheet material |
| 04/29/1981 | EP0027677A1 A method of manufacture of packing containers and packing containers manufactured in accordance with the method |
| 04/28/1981 | US4264490 Composition of a polyethylene and isobutylene copolymer |
| 04/28/1981 | US4264390 Method and apparatus for making pipe sections in materials |
| 04/28/1981 | US4264278 Blade or spar |
| 04/28/1981 | CA1100026A1 Method of and an apparatus for packaging consumer goods |
| 04/22/1981 | EP0027150A1 Apparatus for forming and installing underground drainpipe |
| 04/21/1981 | US4263249 Method for producing reinforced plastic tubular body having annular grooves, and mold therefor |
| 04/21/1981 | US4262979 Multi-part plastic cage for rolling bearings |
| 04/21/1981 | US4262629 Apparatus for application of sealant to can lids |
| 04/21/1981 | US4262581 Method and apparatus for making printed gusset bags |
| 04/21/1981 | US4262514 Method and apparatus for bending a laminated panel |
| 04/21/1981 | CA1099647A1 Tubular filter elements with improved side seam seal |
| 04/15/1981 | EP0027098A1 Method and device for making axially reinforced plastic pipes |
| 04/14/1981 | US4261780 Method of bundling bags by heat-adhesion |
| 04/14/1981 | US4261706 Method of manufacturing connected particles of uniform size and shape with a backing |
| 04/14/1981 | CA1099066A1 Device for facilitating the bending and forming of plastic pipe or other structures |
| 04/08/1981 | EP0026330A1 Method and apparatus for welding together two thermoplastic parts |
| 04/07/1981 | US4260143 Carbon fiber reinforced composite coil spring |
| 04/07/1981 | CA1098931A1 Filament wound pipe coupling and method of and apparatus for making same |
| 04/07/1981 | CA1098675A1 Thermoplastic resin molding of complex decorative relief |
| 04/01/1981 | EP0025971A1 Machine for the continuous production of plastics tubes by helicoidal winding |
| 03/31/1981 | US4259139 Method and apparatus for producing a reinforced plastic pipe |
| 03/31/1981 | US4259131 Method and apparatus for fusing strips |
| 03/25/1981 | EP0025711A1 Bag forming apparatus |
| 03/24/1981 | US4257839 Apparatus for joining opposed leg portions of molded coupling elements for slide fasteners |
| 03/18/1981 | EP0025121A1 Plastic tube obtained by helicoidal winding of a profile |
| 03/17/1981 | US4256680 Method and apparatus for producing reinforced synthetic resin pipe |
| 03/17/1981 | US4256028 Method and apparatus for making plastic preforms for packaging containers |
| 03/11/1981 | EP0024520A1 Process for producing thermally insulated composite profiles |
| 03/10/1981 | US4255378 Bending plastic pipe |
| 03/10/1981 | US4255222 Apparatus for splicing thermoplastic yarns |
| 03/10/1981 | US4255217 Method of forming an embossed decorative surface covering |
| 03/10/1981 | US4255147 Wrapped-molded V-belt and method of manufacture |
| 03/10/1981 | US4254916 Thin wall irrigation emitter tube |
| 03/03/1981 | US4253894 Delivering roving for fabrication of plastic pipe |
| 02/24/1981 | USRE30528 Method of and apparatus for making bonded belt loops |
| 02/24/1981 | US4252591 Corrugating apparatus and process |
| 02/24/1981 | CA1096285A1 Mandrel for fabricating an air spring |
| 02/24/1981 | CA1096284A1 Process and apparatus for the manufacture of posts of reinforced plastics material |
| 02/17/1981 | US4251312 Apparatus for hemming fabric using a hot melt adhesive |
| 02/17/1981 | US4251303 Method and apparatus for making a fillet-seam closure on a folding carton, particularly a peaked-top carton |
| 02/17/1981 | US4251253 Cooling system for molds |
| 02/17/1981 | US4251197 Stretching apparatus of a flattened cylindrical film |
| 02/17/1981 | US4251036 Filament winding apparatus for making fiber reinforced plastic members |
| 02/17/1981 | US4250798 Method of and device for fabricating plastic sleeves |
| 02/17/1981 | US4250612 Method for working the end of a synthetic resin molding having laminated thereon a metal foil |
| 02/11/1981 | EP0023738A1 A method and an arrangement for the manufacture of cylindrical tubes |
| 02/10/1981 | US4249982 Apparatus for making reclosable bags |
| 02/04/1981 | EP0023242A1 Profiled strips and method of forming tubular articles with these strips |
| 02/03/1981 | US4248653 Aluminum-plastic pull tab |
| 02/03/1981 | US4248030 Method for assembling plastic sleeve preforms and containers |
| 02/03/1981 | CA1094936A1 Method and apparatus for attaching a strip of material transversely of a moving web |
| 01/28/1981 | EP0022884A1 Method and apparatus for bending sheet material and bent sheet material obtained |
| 01/27/1981 | US4247273 Method and an apparatus for cambering the edges of webs of thermoplastic materials on one and both sides using the energy of ultrasonic vibration |
| 01/27/1981 | US4247258 Composite wind turbine blade |
| 01/27/1981 | US4246732 Pole, in particular for electric lines |
| 01/22/1981 | WO1981000081A1 Machine for producing the bodies of conical receptacles |
| 01/21/1981 | EP0022467A1 Method of making a drive shaft |
| 01/20/1981 | USRE30489 Longitudinal load carrying method for fiber reinforced filament wound structures |
| 01/20/1981 | US4246461 Induction welding apparatus for plastic containers |
| 01/20/1981 | US4246061 Method and machine for manufacturing multi-tube filters |
| 01/20/1981 | US4246059 Method and apparatus for forming tubular plastic sleeves for flat folding |
| 01/20/1981 | CA1093798A1 Method and means for feeding a continuous core to a coiling station in the manufacturing of coiled coupling elements for slide fasteners together with the core received in place therein |
| 01/13/1981 | US4244772 Apparatus for applying transverse weld seams to superposed webs of plastics film |
| 01/12/1981 | WO1981000077A1 Moulding plastics articles |
| 01/07/1981 | EP0021667A1 Production and storage of polyvinylbutyral sheet rolls |
| 01/07/1981 | EP0021463A1 Method of producing a web of a plurality of interconnected plastics bags |
| 01/07/1981 | EP0020915A1 Process and device for the seamless joining together of thermoplastic, hollow sections |
| 01/06/1981 | US4243733 Electrode structures |