JPS5695251A - Electrostatic recorder - Google Patents
Electrostatic recorderInfo
- Publication number
- JPS5695251A JPS5695251A JP17135379A JP17135379A JPS5695251A JP S5695251 A JPS5695251 A JP S5695251A JP 17135379 A JP17135379 A JP 17135379A JP 17135379 A JP17135379 A JP 17135379A JP S5695251 A JPS5695251 A JP S5695251A
- Authority
- JP
- Japan
- Prior art keywords
- cpu2
- output
- change
- potential
- controlling
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To prevent the degradation of image quality by providing a D/A conversion means of converting the output of a digital computer to analog value, a means of allowing the digital computer to output predetermined value irrespective of the output of said D/A conversion means, etc.
CONSTITUTION: A potential control unit of an electrostatic recorder is constituted of a microcomputer CPU1 for sequence controlling and a microcomputer CPU2 for potential controlling. The CPU2 and a D/A converter Q18 are connected by four data lines DA0WDA3 and one control line LD1, and the D/A converted primary control value is applied to the first terminal of a change-over switch SW2. A change-over switch SW2 is provided in order to change over the potential controlling by the CPU2 and the circuits no through the CPU2 and this changing over makes it possible to maintain the developing bias at a predetermined value by flowing current to the charger even if the CPU2 is disabled owing to a certain accident.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17135379A JPS5695251A (en) | 1979-12-28 | 1979-12-28 | Electrostatic recorder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17135379A JPS5695251A (en) | 1979-12-28 | 1979-12-28 | Electrostatic recorder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5695251A true JPS5695251A (en) | 1981-08-01 |
JPH0253784B2 JPH0253784B2 (en) | 1990-11-19 |
Family
ID=15921617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17135379A Granted JPS5695251A (en) | 1979-12-28 | 1979-12-28 | Electrostatic recorder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5695251A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57129453A (en) * | 1981-02-05 | 1982-08-11 | Ricoh Co Ltd | Multi-mode copying machine |
JPS58209755A (en) * | 1982-05-31 | 1983-12-06 | Canon Inc | Image formation |
JPS6291967A (en) * | 1985-10-18 | 1987-04-27 | Fuji Xerox Co Ltd | Controller for copying machine |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52142518A (en) * | 1976-05-22 | 1977-11-28 | Ricoh Co Ltd | Data indicator for copying machine |
JPS5450329A (en) * | 1977-09-28 | 1979-04-20 | Ricoh Co Ltd | Copier control device using plural micro-computers |
-
1979
- 1979-12-28 JP JP17135379A patent/JPS5695251A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52142518A (en) * | 1976-05-22 | 1977-11-28 | Ricoh Co Ltd | Data indicator for copying machine |
JPS5450329A (en) * | 1977-09-28 | 1979-04-20 | Ricoh Co Ltd | Copier control device using plural micro-computers |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57129453A (en) * | 1981-02-05 | 1982-08-11 | Ricoh Co Ltd | Multi-mode copying machine |
JPS58209755A (en) * | 1982-05-31 | 1983-12-06 | Canon Inc | Image formation |
JPS6291967A (en) * | 1985-10-18 | 1987-04-27 | Fuji Xerox Co Ltd | Controller for copying machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0253784B2 (en) | 1990-11-19 |
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