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Class Information
Number: 226/92
Name: Advancing material of indeterminate length > Threading device > With means to pull lead-end
Description: Device provided with means, usually a gripper*, to positively drag the forward edge of new or broken material to or through the material advancing means.

Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
5152471 Web threading apparatus for web slitting machines Oct. 6, 1992
5121886 Process and apparatus for finding one end of tape wound onto a reel Jun. 16, 1992
5121150 Driving and timing belt for a photographic film processor Jun. 9, 1992
5096134 Device for unrolling and cutting leading end portion of strip-like material wound in roll Mar. 17, 1992
5094394 Method and device for threading the end of a web Mar. 10, 1992
5052295 Paper web threading apparatus for rotary printing press Oct. 1, 1991
5048987 Paper guide for tractor feed printers Sep. 17, 1991
5029742 Web pulling system, particularly for threading a paper web in a rotary printing machine Jul. 9, 1991
5016831 Method and device for threading the end of a web May. 21, 1991
4987830 Paper feed device for rotary press Jan. 29, 1991
4977474 Magnetic tape cartridge requiring uniform force during leader block attachment and detachment Dec. 11, 1990
4960047 Topping foil loading mechanism and method Oct. 2, 1990
4931141 Paper tailing device Jun. 5, 1990
4929976 Film transport system May. 29, 1990
4919049 Web feed printing press Apr. 24, 1990
4883209 Apparatus for threading the leaders of flexible webs in a processing machine Nov. 28, 1989
4863085 Apparatus for transporting a strip of photographic printing paper in a printer Sep. 5, 1989
4860044 Photographic material processing unit Aug. 22, 1989
4853730 Clamp mounting mechanism and method for photographic processing apparatus Aug. 1, 1989
4846417 Method of and apparatus for the feeding of a paper web to a roll-making machine Jul. 11, 1989
4836464 Cassette winding apparatus and method for operating Jun. 6, 1989
4832284 Apparatus for drawing out a leader block in a tape cartridge for a magnetic instrument May. 23, 1989
4828201 Apparatus for coupling a drive motor to a leader block loading/unloading mechanism May. 9, 1989
4824039 Apparatus for applying a paper web to the underside of a roll-making drum Apr. 25, 1989
4821935 Threading apparatus for films Apr. 18, 1989
4821060 Apparatus for attaching clips to leader belts for photosensitive webs Apr. 11, 1989
4819557 Flexibly coupled roller chain for threading a substrate web in a rotary web printing machine Apr. 11, 1989
4817841 Threading bar for use with a wire coating apparatus having parallel transport cables Apr. 4, 1989
4809099 Transport for tape cartridge with leader block Feb. 28, 1989
4805847 Apparatus for treating a web of continuous material Feb. 21, 1989
4796041 Film feed unit for use in automatic film developing machine Jan. 3, 1989
4795522 Bead filler applicator Jan. 3, 1989
4773580 Device for transmitting motion to webs of photographic material in developing machines and the like Sep. 27, 1988
4772907 Unit for collecting developed films in a film developing machine, particularly of industrial kind Sep. 20, 1988
4763152 Photographic film processing rack and method of assembling the same Aug. 9, 1988
4759484 Printing form feeder device and method Jul. 26, 1988
4750659 Device for drawing a web into a webfed machine Jun. 14, 1988
4747254 Web threading device May. 31, 1988
4742407 Tape threading device May. 3, 1988
4739357 Multi-pitch film leader card Apr. 19, 1988
4723698 Device for introducing a strip of material between the rollers of a loop take-up apparatus Feb. 9, 1988
4717090 Device for restoring and removing a tape leader block to and from a tape cassette Jan. 5, 1988
4706862 Web threading apparatus, particularly for threading of a rotary printing machine, or similar paper handling system Nov. 17, 1987
4704645 Transport for tape cartridge with leader block Nov. 3, 1987
4681278 Guide for restoring and removing a tape leader block to and from a tape cassette Jul. 21, 1987
4680951 Method for dressing hot rolled strip coils, especially coilbox coils Jul. 21, 1987
4678109 Tractor mechanism for printers Jul. 7, 1987
4674702 Cassette system having quick connect feature Jun. 23, 1987
4662554 Apparatus for processing photosensitive material May. 5, 1987
4648942 Paper machine Mar. 10, 1987

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