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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 |
| 5164778 |
Image forming apparatus with ozone detection and deodorizer |
Nov. 17, 1992 |
| 5164767 |
Image forming system having external signal generating means |
Nov. 17, 1992 |
| 5162874 |
Electrophotographic machine having a method and apparatus for measuring toner density by using diffuse electromagnetic energy |
Nov. 10, 1992 |
| 5161084 |
Apparatus for controlling an output of chargers for use in image forming apparatus |
Nov. 3, 1992 |
| 5153745 |
Method and apparatus for compensating for illumination variations of a lamp in a document scanning system following extended lamp inactivity |
Oct. 6, 1992 |
| 5148218 |
Image forming apparatus with a humidity detector |
Sep. 15, 1992 |
| 5138373 |
Copier or printer component position floating magnetic actuator |
Aug. 11, 1992 |
| 5138376 |
Image forming apparatus including control system provided with a master control unit and a plurality of subsidiary control units |
Aug. 11, 1992 |
| 5131079 |
Method of controlling a display and a display control device for a copying machine |
Jul. 14, 1992 |
| 5126856 |
Color processor with diagnosis of fault condition by comparing density levels |
Jun. 30, 1992 |
| 5124732 |
Electrophotographic printer means with regulated electrophotographic process |
Jun. 23, 1992 |
| 5121199 |
Color image sensor defect detector using differentiated I and Q values |
Jun. 9, 1992 |
| 5115273 |
Image forming apparatus having a detachable memory |
May. 19, 1992 |
| 5073464 |
Method of processing electrophotographic lithographic printing plate precursors |
Dec. 17, 1991 |
| 5049906 |
Fixing process controller for electrophotographic recorder |
Sep. 17, 1991 |
| 5049924 |
Image forming apparatus |
Sep. 17, 1991 |
| 5043744 |
Raster scanner including scanning beam tilt correction |
Aug. 27, 1991 |
| 5043864 |
Image forming apparatus |
Aug. 27, 1991 |
| 5023631 |
Stopping process control device |
Jun. 11, 1991 |
| 5003346 |
Image forming device |
Mar. 26, 1991 |
| 4979386 |
Developer roll adjustment indicator device |
Dec. 25, 1990 |
| 4965613 |
Page printer with machine-readable-character-based controls |
Oct. 23, 1990 |
| 4937664 |
Image forming apparatus |
Jun. 26, 1990 |
| 4937626 |
Image forming apparatus |
Jun. 26, 1990 |
| 4926310 |
Image forming apparatus |
May. 15, 1990 |
| 4910551 |
Portable image forming apparatus |
Mar. 20, 1990 |
| 4903051 |
Image forming apparatus for controlling developer to be replenished in accordance with density of developer |
Feb. 20, 1990 |
| 4860059 |
Method of setting color copying conditions |
Aug. 22, 1989 |
| 4855766 |
Image recording apparatus detecting and controlling image contrast |
Aug. 8, 1989 |
| 4839698 |
Copying apparatus |
Jun. 13, 1989 |
| 4835577 |
Negative/positive microfilm discriminating system |
May. 30, 1989 |
| 4831418 |
Exposure control device of copying machine |
May. 16, 1989 |
| 4830501 |
Method of classifying color originals and apparatus thereof |
May. 16, 1989 |
| 4800337 |
Method and means for determining a measure of the surface potential of a medium charged by means of a corona charging device |
Jan. 24, 1989 |
| 4796060 |
Automatic exposure device |
Jan. 3, 1989 |
| 4778740 |
Color electrophotographic method and apparatus |
Oct. 18, 1988 |
| 4779121 |
Document scanning device |
Oct. 18, 1988 |
| 4758860 |
Image forming apparatus |
Jul. 19, 1988 |
| 4728984 |
Data handling and archiving system |
Mar. 1, 1988 |
| 4728991 |
Image forming apparatus |
Mar. 1, 1988 |
| 4710785 |
Process control for electrostatographic machine |
Dec. 1, 1987 |
| 4684235 |
Image forming apparatus |
Aug. 4, 1987 |
| 4669862 |
Program controlled image forming apparatus |
Jun. 2, 1987 |
| 4670647 |
Dirt insensitive optical paper path sensor |
Jun. 2, 1987 |
| 4659214 |
Document detecting apparatus |
Apr. 21, 1987 |
| 4617661 |
Electronic copying machine |
Oct. 14, 1986 |
| 4589080 |
Apparatus and method for predicting failure in a copier's paper path |
May. 13, 1986 |
| 4586034 |
Color coded copier display |
Apr. 29, 1986 |
| 4542985 |
Image formation apparatus |
Sep. 24, 1985 |
| 4540269 |
Opening detecting device of a copy document cover suitable for electrophotographic copying machine |
Sep. 10, 1985 |
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