JPS5695251A - Electrostatic recorder - Google Patents

Electrostatic recorder

Info

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
Application number
JP17135379A
Other languages
Japanese (ja)
Other versions
JPH0253784B2 (en
Inventor
Koki Kuroda
Koji Suzuki
Joji Nagahira
Sunao Nagashima
Yoshiaki Takayanagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP17135379A priority Critical patent/JPS5695251A/en
Publication of JPS5695251A publication Critical patent/JPS5695251A/en
Publication of JPH0253784B2 publication Critical patent/JPH0253784B2/ja
Granted legal-status Critical Current

Links

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
JP17135379A 1979-12-28 1979-12-28 Electrostatic recorder Granted JPS5695251A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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