JPS5786842A - Adjustment device for density irregularity of electrophotographic copying machine - Google Patents
Adjustment device for density irregularity of electrophotographic copying machineInfo
- Publication number
- JPS5786842A JPS5786842A JP55163024A JP16302480A JPS5786842A JP S5786842 A JPS5786842 A JP S5786842A JP 55163024 A JP55163024 A JP 55163024A JP 16302480 A JP16302480 A JP 16302480A JP S5786842 A JPS5786842 A JP S5786842A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive drum
- corona generator
- drum
- detected
- density irregularity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
- G03G15/5037—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor the characteristics being an electrical parameter, e.g. voltage
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To prevent the left-right density irregularity of a photosensitive drum by providing detection electrode, which slides on a conductor, on an inner side and an outer side, by detecting and comparing voltages from a corona generator, and by making adjustment so that detected values from both the detection electrodes are balanced. CONSTITUTION:When corona discharge is performed by a corona generator 23, the photoreceptor part 20a of a photosensitive drum 20 is charged and drum currents flow through conductor parts 22a and 22b on the photosensitive drum 20. Those drum currents are detected by detection electrodes 26a and 26b and converted by current-voltage converting circuits 27a and 27b, and a comparing circuit 28 detects a level difference between detected voltages from both the converting circuits 27a and 27b to operate a motor control circuit 29; and the position control motor 30 of the corona generator 23 moves up or down one end part 23 of the corona generator 23 to balance the level difference, and adjustment is so made that the photoreceptor part 20a of the photosensitive drum 20 is charged uniformly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55163024A JPS5786842A (en) | 1980-11-19 | 1980-11-19 | Adjustment device for density irregularity of electrophotographic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55163024A JPS5786842A (en) | 1980-11-19 | 1980-11-19 | Adjustment device for density irregularity of electrophotographic copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5786842A true JPS5786842A (en) | 1982-05-31 |
Family
ID=15765729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55163024A Pending JPS5786842A (en) | 1980-11-19 | 1980-11-19 | Adjustment device for density irregularity of electrophotographic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5786842A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60229039A (en) * | 1984-04-27 | 1985-11-14 | Konishiroku Photo Ind Co Ltd | Recording device |
| JPS61500690A (en) * | 1983-10-03 | 1986-04-10 | イ−ストマン・コダック・カンパニ− | electrophotographic copying device |
| JPH03100667A (en) * | 1989-09-14 | 1991-04-25 | Konica Corp | Image forming device |
| US5142329A (en) * | 1990-03-02 | 1992-08-25 | Ricoh Company, Ltd. | Method and apparatus for positioning a corona discharger |
| WO2002019039A1 (en) * | 2000-09-01 | 2002-03-07 | Csat Gesellschaft Für Computer-Systeme Und Automations-Technik Mit Beschränkter Haftung | Electrophotographic or ionographic printer having variable printing speed |
-
1980
- 1980-11-19 JP JP55163024A patent/JPS5786842A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61500690A (en) * | 1983-10-03 | 1986-04-10 | イ−ストマン・コダック・カンパニ− | electrophotographic copying device |
| JPH0525112B2 (en) * | 1983-10-03 | 1993-04-09 | Eastman Kodak Co | |
| JPS60229039A (en) * | 1984-04-27 | 1985-11-14 | Konishiroku Photo Ind Co Ltd | Recording device |
| JPH03100667A (en) * | 1989-09-14 | 1991-04-25 | Konica Corp | Image forming device |
| US5142329A (en) * | 1990-03-02 | 1992-08-25 | Ricoh Company, Ltd. | Method and apparatus for positioning a corona discharger |
| WO2002019039A1 (en) * | 2000-09-01 | 2002-03-07 | Csat Gesellschaft Für Computer-Systeme Und Automations-Technik Mit Beschränkter Haftung | Electrophotographic or ionographic printer having variable printing speed |
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