| Patents for G03G 21 - Arrangements not provided for by groups , e.g. cleaning, elimination of residual charge (34,276) |
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| 11/11/1980 | CA1089509A1 Process for treating pile materials made into electrophotographic toner removal brushes |
| 11/04/1980 | US4231652 Drum for electrophotographic copier |
| 11/04/1980 | US4231567 Method and apparatus for clearing jams in copiers |
| 11/04/1980 | US4231562 Recirculating document feeder |
| 11/04/1980 | CA1088739A1 Apparatus for cleaning and developing dielectric receptor sheets for latent images |
| 10/28/1980 | US4230406 Cleaning system for an electrostatic copier |
| 10/21/1980 | US4229511 Electrophotography with uniform exposure for residual potential |
| 10/21/1980 | US4229100 Automatic copy recovery |
| 10/21/1980 | US4229096 Countdown and start mechanism for an electrostatic copier |
| 10/21/1980 | CA1088144A1 Chain feed control logic for a multi-mode copier/duplicator |
| 10/15/1980 | EP0017514A1 Apparatus having a diagnostic mode of operation, and method of putting the apparatus into this mode |
| 10/15/1980 | EP0017380A1 Apparatus for removing particles from a travelling member |
| 10/15/1980 | EP0016924A1 A document reproduction machine including an enclosed exposure station |
| 10/15/1980 | EP0016923A1 Electrophotographic copier incorporating a border discharge device |
| 10/14/1980 | US4227720 Protected document |
| 10/14/1980 | US4227719 Protection system for documents |
| 10/14/1980 | CA1087545A1 Self-contained motor-driven collator deflector |
| 10/14/1980 | CA1087427A1 Continuously variable reduction copier optics systems |
| 10/01/1980 | EP0016301A1 Electrostatic machine incorporating toner scavenging chamber |
| 10/01/1980 | EP0016300A1 Electrostatic copier |
| 10/01/1980 | EP0016110A1 Method for providing electrical connection means in an electrographic element |
| 09/29/1980 | EP0016110A4 Method for providing electrical connection means in an electrographic element. |
| 09/23/1980 | US4223993 Electrophotographic apparatus |
| 09/17/1980 | EP0015686A1 Apparatus for supporting a travelling belt |
| 09/16/1980 | US4222659 Copying apparatus for sheet originals and thicker originals |
| 09/16/1980 | CA1085904A1 Duplicating machine employing image reversing optical paths with front edge document alignment on document input and output |
| 09/09/1980 | US4221480 Belt support and control system |
| 09/09/1980 | CA1085446A1 Electrophotographic copying apparatus |
| 09/09/1980 | CA1085211A1 Multiple reduction indicators for continuously variable reduction copier machines |
| 09/02/1980 | US4220699 Method for producing a large number of copies by means of copying apparatus |
| 09/02/1980 | CA1084770A1 Image transfer unit for electrophotographic copying machines |
| 08/26/1980 | US4219272 Electrophotographic copier with replaceable photoconductive sheet |
| 08/26/1980 | US4219271 Image forming method and device for controlling image density |
| 08/26/1980 | US4219270 Reproducing apparatus |
| 08/20/1980 | EP0014395A1 Indicator circuit including a bridge circuit with means for error indication independent of voltage source variation |
| 08/19/1980 | US4218132 Drum cleaning apparatus for electrophotographic copying machine |
| 08/19/1980 | US4218131 Cleaning device |
| 08/19/1980 | US4218129 Electrophotographic apparatus |
| 08/19/1980 | US4218126 Developer collection device for a copying machine |
| 08/19/1980 | US4218125 Pneumatic system for supporting a photoconductive surface |
| 08/12/1980 | CA1083656A1 Vibrating blade cleaner |
| 08/12/1980 | CA1083655A1 Apparatus for producing collated copies from two sided originals |
| 08/05/1980 | US4216282 AC corona to remove background from the imaging member of a magnetic copier |
| 08/05/1980 | US4215931 Electrophotographic apparatus |
| 08/05/1980 | US4215588 Control device for an intermittently movable driver member |
| 07/29/1980 | US4214833 Operation timing control system for mechanical apparatus operable under program control |
| 07/29/1980 | CA1082448A1 Developing system for electostatic reproduction machines |
| 07/22/1980 | US4214234 Range tracking analog to digital converter for use with a bridge |
| 07/22/1980 | US4213794 Cleaning station |
| 07/22/1980 | CA1082290A1 Automatic copier mode controls |
| 07/22/1980 | CA1082015A1 Continuously variable reduction scanning optics drive |
| 07/15/1980 | US4213190 Programmed copier control |
| 07/15/1980 | US4212457 Pre/post-collation copying system |
| 07/15/1980 | CA1081762A1 Multi-process control system for an electrophotographic printing machine |
| 07/15/1980 | CA1081723A1 Document feeder with recirculation and unloading |
| 07/08/1980 | US4211484 Drum cleaning blade for image transfer type electrophotographic copying machine |
| 07/01/1980 | US4210448 One-component magnetic toner, corona |
| 07/01/1980 | US4210346 Protected document bearing watermark and method of making |
| 07/01/1980 | US4210319 Copy set counter duplex tray |
| 06/24/1980 | US4209249 Method and apparatus for generating duplex copies electrophotographically from simplex originals |
| 06/24/1980 | US4209248 Continuously variable reduction copier optics systems |
| 06/24/1980 | CA1079954A1 Toner reclaim conveyor |
| 06/17/1980 | CA1079793A1 Single array ink jet printer |
| 06/17/1980 | CA1079791A1 Memory management system for an ink jet copier |
| 06/17/1980 | CA1079790A1 Ink jet copier |
| 06/17/1980 | CA1079519A1 Self-compensating photoconductor web |
| 06/10/1980 | US4206996 Job recovery method and apparatus |
| 06/10/1980 | US4206995 Reproduction machine with on board document handler diagnostics |
| 06/03/1980 | US4205912 Electrophotographic apparatus |
| 06/03/1980 | US4205911 Cleaning system |
| 05/27/1980 | US4204730 Electrophotographic apparatus |
| 05/27/1980 | US4204670 Sorter for a reproduction machine |
| 05/27/1980 | US4204472 Duplexing copying system |
| 05/27/1980 | CA1078487A1 Document article handling control |
| 05/27/1980 | CA1078449A1 Deformable storage element for x-ray image display |
| 05/27/1980 | CA1078448A1 Deformable x-ray image display element |
| 05/27/1980 | CA1078422A1 Mini-collator/sorter |
| 05/20/1980 | US4203663 Computer controlled electrostatic copying machine |
| 05/20/1980 | US4203386 Electrostatic copier with insertable developer module |
| 05/14/1980 | EP0010948A1 Electrostatographic printing machine |
| 05/14/1980 | EP0010848A1 Electrophotographic apparatus having a replaceable photoconductive belt |
| 05/13/1980 | US4202622 Digitally controlled image forming apparatus |
| 05/13/1980 | US4202618 Electrostatic copying machine having flash-discharge-lamp fixing unit |
| 05/13/1980 | US4202542 Apparatus for handling flexible sheet material of different sizes |
| 05/13/1980 | CA1077556A1 Recirculating sheet feeder |
| 05/13/1980 | CA1077535A1 Duo sequence page compiler with bidirectional joggers |
| 05/06/1980 | US4201465 Drum cleaning process and apparatus for electrophotography |
| 05/06/1980 | US4201464 Copy production machines having job separation capabilities |
| 05/06/1980 | CA1077123A1 Copying apparatus with moving belt for transferring electrostatic or powder images |
| 04/29/1980 | US4200391 Electrostatographic apparatus comprising document density sensing means |
| 04/29/1980 | US4200390 Combined copying and printing apparatus |
| 04/29/1980 | US4200386 Copier/collator with extended collate functions |
| 04/29/1980 | US4200278 Sorting apparatus for reproduction machine producing simplex and duplex copies |
| 04/15/1980 | US4198156 Optics contamination prevention utilizing a coanda air deflection system |
| 04/15/1980 | US4198155 Photoconductive belt assembly |
| 04/15/1980 | CA1075762A1 Apparatus and method for neutralizing static charges in sheet/web feeding devices |
| 04/15/1980 | CA1075758A1 Dual mode electrophotographic apparatus having dual function printing beam |
| 04/15/1980 | CA1075757A1 Programmable controller for controlling reproduction machines |
| 04/15/1980 | CA1075756A1 Programmable controller for controlling reproduction machines |
| 04/08/1980 | US4197121 Method of making electrophotographic images with a uniform exposure step |