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Class Information
Number: 399/9
Name: Electrophotography > Diagnostics
Description: Subject matter wherein a means or method is provided for detecting or analyzing (a) a condition that is outside the normal operating condition or (b) a malfunction or potential malfunction of an electrophotographic device or component thereof.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5548375 |
Integrated printing system for automated and maintenance free operation |
Aug. 20, 1996 |
| 5541719 |
Fixing device having conductive fixing film in image forming apparatus |
Jul. 30, 1996 |
| 5539522 |
Color copying machine provided with color correcting circuit |
Jul. 23, 1996 |
| 5539510 |
Image forming apparatus having a rotating detection lever operable in vertical and horizontal positions |
Jul. 23, 1996 |
| 5539499 |
Image forming apparatus with improved warning indication for plurality of troubles |
Jul. 23, 1996 |
| 5519418 |
Recording apparatus and method with comparison of calculated and actual ink use |
May. 21, 1996 |
| 5508789 |
Apparatus and method to control and calibrate deliberate speed mismatch in color IOTs |
Apr. 16, 1996 |
| 5504556 |
Electrostatic recording apparatus, method of controlling the apparatus, and method of evaluating life of photoconductive member of electrostatic recording apparatus |
Apr. 2, 1996 |
| 5504590 |
Communication system for managing data of resources of image forming unit |
Apr. 2, 1996 |
| 5502575 |
Imaging apparatus having a counterfeiting prevention function |
Mar. 26, 1996 |
| 5491535 |
Control appartus of copying machine with improved communication function for centralized control |
Feb. 13, 1996 |
| 5490089 |
Interactive user support system and method using sensors and machine knowledge |
Feb. 6, 1996 |
| 5481335 |
Image forming apparatus having error detection with automatic error display |
Jan. 2, 1996 |
| 5475468 |
Method and copying machine for preventing illegal copying |
Dec. 12, 1995 |
| 5446523 |
Image forming apparatus having self-repair function and self-repair method for the apparatus |
Aug. 29, 1995 |
| 5444846 |
Image processing apparatus having diagnostic mode |
Aug. 22, 1995 |
| 5436697 |
Image potential control system and image forming apparatus using the same |
Jul. 25, 1995 |
| 5430532 |
Developing device with a tilt detecting function designed for a trickle system |
Jul. 4, 1995 |
| 5424807 |
Image processing apparatus with forgery prevention system |
Jun. 13, 1995 |
| 5412779 |
Method and apparatus for controlling and communicating with business office devices |
May. 2, 1995 |
| 5398100 |
Image recording apparatus operable with a vertical scan synchronization signal |
Mar. 14, 1995 |
| 5394458 |
System for the remote monitoring of a reproduction apparatus |
Feb. 28, 1995 |
| 5389955 |
Image forming apparatus directly correcting an image data in response to changes in image potential data |
Feb. 14, 1995 |
| 5381167 |
Color image forming apparatus |
Jan. 10, 1995 |
| 5374993 |
Image skew adjustment for a raster output scanning (ROS) system |
Dec. 20, 1994 |
| 5343275 |
Job programming during machine quality adjust |
Aug. 30, 1994 |
| 5313308 |
Image forming apparatus which changes its tone reproducing property in accordance with ambient conditions |
May. 17, 1994 |
| 5306346 |
Apparatus for coating fasteners |
Apr. 26, 1994 |
| 5307118 |
Electrophotographic process control device using fuzzy logic |
Apr. 26, 1994 |
| 5305055 |
Automatic call to selected remote operators in response to predetermined machine conditions |
Apr. 19, 1994 |
| 5293197 |
Image forming device capable of being maintained easily by using IC card |
Mar. 8, 1994 |
| 5289147 |
Image forming apparatus having system for reducing noise |
Feb. 22, 1994 |
| 5283613 |
Monitoring system with dual memory for electrophotographic printing machines using replaceable cartridges |
Feb. 1, 1994 |
| 5278611 |
Image duplicating apparatus for use with an external data storage medium |
Jan. 11, 1994 |
| 5272492 |
Compensation of magnification mismatch in single pass color printers |
Dec. 21, 1993 |
| 5257069 |
Copying machine control system controlling a plurality of copying machines through communication network |
Oct. 26, 1993 |
| 5241276 |
Surface potential measuring system |
Aug. 31, 1993 |
| 5239547 |
Self-diagnosis and self-repair system for image forming apparatus |
Aug. 24, 1993 |
| 5221974 |
Image reader using two frames each driven by a different motor for adjustment of focus |
Jun. 22, 1993 |
| 5216471 |
Image forming apparatus and roll paper cutting device |
Jun. 1, 1993 |
| 5216463 |
Electrophotographic process control device using a neural network to control an amount of exposure |
Jun. 1, 1993 |
| 5214470 |
Method and apparatus for compensating for dirt or etched areas on a document platen |
May. 25, 1993 |
| 5206686 |
Apparatus for forming an image with use of electrophotographic process including gradation correction |
Apr. 27, 1993 |
| 5192971 |
Image forming apparatus with image forming interruption capabilities |
Mar. 9, 1993 |
| 5191293 |
Park and ride method for determining photoreceptor potentials |
Mar. 2, 1993 |
| 5179410 |
Printer dynamic job recovery in an electronic reprographic printing system |
Jan. 12, 1993 |
| 5177530 |
Copying machine having plural developing units |
Jan. 5, 1993 |
| 5175570 |
Color image forming apparatus having an adjustor which corrects the position of a latent image according to registration marks |
Dec. 29, 1992 |
| 5175735 |
Method and apparatus for handling object faults in an electronic reprographic printing system |
Dec. 29, 1992 |
| 5168307 |
Image forming device |
Dec. 1, 1992 |
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