| Patents for G03G 21 - Arrangements not provided for by groups , e.g. cleaning, elimination of residual charge (34,276) |
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| 07/24/1990 | US4943828 Replacement of a cartridge usable with image forming equipment |
| 07/24/1990 | US4943815 Laser printer with light-exposure prevention |
| 07/18/1990 | EP0377705A1 Cleaning apparatus having airfoils. |
| 07/17/1990 | US4942429 Image recording apparatus with a removable developing unit |
| 07/11/1990 | EP0377167A1 Safety element to protect documents against unauthorized reproduction |
| 07/11/1990 | CN1008775B Waste toner full-detector |
| 07/10/1990 | US4941022 Toner recovery device |
| 07/10/1990 | US4941017 Copying apparatus having a binding margin forming function |
| 07/10/1990 | US4941015 Device for screening a photoconductive element unit from external light |
| 07/10/1990 | US4941002 Page printer |
| 07/04/1990 | EP0376617A2 Color image forming apparatus |
| 07/04/1990 | CN1008666B Control for retracting cleaning blade of printing machine |
| 07/03/1990 | US4939552 Copying apparatus with drum or fixing roller cleaning belt driven from document scanner |
| 07/03/1990 | US4939551 Cleaning device for electrophotographic copying machines |
| 07/03/1990 | US4939549 Image forming apparatus with temperature controlling shield |
| 07/03/1990 | US4939543 Fluid jet assisted ion projection machine |
| 07/03/1990 | US4939541 Image forming apparatus |
| 07/03/1990 | US4938786 Filter for removing smoke and toner dust in electrophotographic/electrostatic recording apparatus |
| 06/27/1990 | EP0374920A2 Developer circulator unit of the images forming apparatus |
| 06/27/1990 | EP0374567A2 Electrostatic printer using continuous paper |
| 06/26/1990 | US4937635 Multiple image registration |
| 06/26/1990 | US4937634 Reproducing machine with document feeding apparatus |
| 06/26/1990 | US4937633 Cleaning blade defect sensing arrangement |
| 06/26/1990 | US4937632 Cleaning device of image-forming apparatus |
| 06/26/1990 | US4937623 Image duplicating apparatus having changeable document scanning modes |
| 06/26/1990 | US4937621 Malfunction display and operation inhibiting device for an image forming apparatus |
| 06/26/1990 | US4937612 Optical scanning system for duplex copying |
| 06/26/1990 | US4937117 Flexible belt |
| 06/20/1990 | EP0373654A2 Recording apparatus |
| 06/20/1990 | CN1043206A Electro-photography apparatus |
| 06/19/1990 | US4935787 Color copier operable both in monochromatic and full-color copying modes |
| 06/19/1990 | US4935786 Method and apparatus for duplex printing |
| 06/19/1990 | US4935778 Electrophotographic image forming apparatus with fly wheel |
| 06/19/1990 | US4935777 Method of stabilizing surface potential of photoreceptor for electrophotography |
| 06/19/1990 | US4934681 Hybrid output duplex copying system |
| 06/13/1990 | EP0371991A1 Liquid toner recycling system and method |
| 06/12/1990 | US4933725 Image duplicating apparatus with locking means |
| 06/12/1990 | US4933721 Image forming apparatus with preconditioning exposure selectively forming a multi-color and mono-color image |
| 06/12/1990 | US4933720 Paper size selecting device in a recording apparatus |
| 06/12/1990 | US4933719 Image forming apparatus |
| 06/12/1990 | US4933718 Electrostatographic printing apparatus with imaging member installation detection |
| 06/12/1990 | US4932355 Method for removing a developer mix from a developing station |
| 06/06/1990 | EP0371842A1 Device for recycling solid particles of a developer, which are separated from a transporting gas flux, into an open reservoir |
| 06/06/1990 | EP0371828A1 Apparatus for separating and recovering solid toner particles transported by a gas flow |
| 06/06/1990 | EP0371727A1 Power circuit device |
| 06/06/1990 | EP0371671A2 Display device in image forming apparatus |
| 06/06/1990 | EP0371387A2 A copying machine |
| 06/05/1990 | US4931841 Electrophotographic apparatus having abraded surface photosensitive member |
| 06/05/1990 | US4931840 Cleaning device |
| 06/05/1990 | US4931838 Developing apparatus and process cartridge having the same |
| 06/05/1990 | US4931837 Removable developing unit for an electrostatic copier and locking device therefor |
| 05/31/1990 | WO1990005941A1 Liquid developer based imaging machine and developer electrode therefor |
| 05/30/1990 | EP0370818A2 Two element electrical connection |
| 05/30/1990 | EP0370783A2 Hybrid output duplex copying system |
| 05/30/1990 | EP0370679A2 Image forming apparatus |
| 05/30/1990 | EP0370495A1 Image forming apparatus capable of performing a color mode and a monochromatic mode |
| 05/30/1990 | EP0370455A2 Color copy machine with detachable process cartridge |
| 05/29/1990 | US4929982 Sheet path in an electrophotographic printer |
| 05/29/1990 | US4929529 Method of increasing sensitivity of digital photosensitive member |
| 05/28/1990 | CA2000812A1 Copy indicator for a document |
| 05/23/1990 | EP0369805A2 Apparatus for cleaning and moving a photoreceptor |
| 05/22/1990 | US4928149 For preventing particles being transported on a moving image |
| 05/22/1990 | US4928143 Image forming apparatus with image erasing lamp |
| 05/22/1990 | US4927180 Marking of articles with photochromic compounds |
| 05/21/1990 | CA2003398A1 Color copy machine with detachable process cartridge |
| 05/16/1990 | EP0368598A2 A toner recovery device |
| 05/16/1990 | EP0368346A2 Image-forming machine |
| 05/16/1990 | CN1008003B Waste toner full-detector |
| 05/15/1990 | US4926310 Image forming apparatus |
| 05/15/1990 | US4926219 Improved paper handling mechanism in conjunction with image forming apparatus such as laser printers |
| 05/15/1990 | US4926218 Image forming apparatus |
| 05/15/1990 | US4926216 Feeder of sheet-like photo-sensitive material |
| 05/15/1990 | US4925176 Signature job copying system |
| 05/10/1990 | DE3937356A1 Image generator for photocopier, printer etc. - has control for periodical exposure of rotary photoconductor by illuminating device |
| 05/09/1990 | EP0367203A2 Electrophotographic apparatus |
| 05/08/1990 | US4924320 Image system with connection to operational units |
| 05/08/1990 | US4924274 Copying machine |
| 05/08/1990 | US4924272 Cleaning assembly for electrostatographic apparatus |
| 05/08/1990 | US4924269 Original illuminating apparatus |
| 05/08/1990 | US4924268 Electronic copier with simultaneous charger and erasing array cleaning |
| 05/08/1990 | US4924267 Process cartridge and multi-color image forming apparatus using same |
| 05/08/1990 | US4924262 Shutter calibration and document size detection |
| 05/08/1990 | US4923581 Toner recycling by counterflow |
| 05/03/1990 | DE3935618A1 Compact electrophotographic copier with copy sheet blockage detection - provides control signal for automatic reduction of lamp output level |
| 05/02/1990 | EP0366426A1 Electrophotographic device having an a.c. biased cleaning member |
| 05/02/1990 | EP0366425A1 Job processing system for use with document copying/printing machines |
| 05/02/1990 | EP0366399A2 Image processing apparatus and method therefor |
| 05/01/1990 | US4922306 Copying apparatus with document feeder |
| 05/01/1990 | US4922305 Apparatus for release of debris trapped between a blade and charge retentive surface |
| 05/01/1990 | US4922297 Mounting structure of photosensitive drum |
| 05/01/1990 | US4922293 Control system for an image forming apparatus |
| 05/01/1990 | US4922272 High precision image recording apparatus |
| 04/26/1990 | DE3843360C1 Device for transporting toner in electrophotographic printing devices |
| 04/25/1990 | EP0365254A2 Memory device for a page printer |
| 04/24/1990 | US4920384 Copying machine with automatic document feeding means |
| 04/24/1990 | US4920383 Paper handling for repetitive movement of variable length media through an image transfer station |
| 04/24/1990 | US4920379 Image forming apparatus with a common power source for various chargers and a simplified arrangement for subjecting the photosensitive drum to blank exposure |
| 04/24/1990 | US4919071 Dry toner removable developing cartridge |
| 04/19/1990 | DE3934305A1 Document handler for photocopier - has automatic feed and programmable copy sheet counter and comparator for accepting fan-fold continuous computer print=out paper |
| 04/18/1990 | EP0364287A2 Page entering apparatus for electrophotographic copying machine |