JPS57144570A - Controller of electronic copier - Google Patents
Controller of electronic copierInfo
- Publication number
- JPS57144570A JPS57144570A JP56029957A JP2995781A JPS57144570A JP S57144570 A JPS57144570 A JP S57144570A JP 56029957 A JP56029957 A JP 56029957A JP 2995781 A JP2995781 A JP 2995781A JP S57144570 A JPS57144570 A JP S57144570A
- Authority
- JP
- Japan
- Prior art keywords
- potential
- bright
- electric charge
- dark
- photoreceptor
- 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
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0266—Arrangements for controlling the amount of charge
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To obtain a high-quality electrostatic latent image with an electronic copier that performs the 1st electric charge and the 2nd electric charge having the opposite polarity to the 1st electric charge, by always keeping the potential at both the bright and dark parts at a constant level. CONSTITUTION:Both the bright and dark part potentials which are caused on a photoreceptor 1 by the white and black patterns 8 and 9 provided on an original board 5 are detected successively by a surface potential detecting sensor 6. This detected potential (a) of the bright and dark parts is fed to a microcomputer 10. The computer 10 controls high voltage generators 21a and 21b and then controls the discharged current of a charger 2 so that the potential of the bright part becomes equal to the reference value. At the same time, the discharged current is controlled for a charger 3 so as to set the potential of the dark part equal to the reference value. In such way, the potential is always kept at a constant level at both the bright and dark parts. Thus a high-quality electrostatic latent image is obtained regardless of the fatigue of a photoreceptor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56029957A JPS57144570A (en) | 1981-03-04 | 1981-03-04 | Controller of electronic copier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56029957A JPS57144570A (en) | 1981-03-04 | 1981-03-04 | Controller of electronic copier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57144570A true JPS57144570A (en) | 1982-09-07 |
Family
ID=12290455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56029957A Pending JPS57144570A (en) | 1981-03-04 | 1981-03-04 | Controller of electronic copier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57144570A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5337025A (en) * | 1976-09-17 | 1978-04-05 | Canon Inc | Stabilizing method for electrostatic latent |
| JPS553704A (en) * | 1978-06-07 | 1980-01-11 | Shino Seisakusho:Kk | Production of rindless paste product |
| JPS55117163A (en) * | 1979-03-02 | 1980-09-09 | Canon Inc | Image forming device |
-
1981
- 1981-03-04 JP JP56029957A patent/JPS57144570A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5337025A (en) * | 1976-09-17 | 1978-04-05 | Canon Inc | Stabilizing method for electrostatic latent |
| JPS553704A (en) * | 1978-06-07 | 1980-01-11 | Shino Seisakusho:Kk | Production of rindless paste product |
| JPS55117163A (en) * | 1979-03-02 | 1980-09-09 | Canon Inc | Image forming device |
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