JPS5727265A - Copying apparatus - Google Patents

Copying apparatus

Info

Publication number
JPS5727265A
JPS5727265A JP10191480A JP10191480A JPS5727265A JP S5727265 A JPS5727265 A JP S5727265A JP 10191480 A JP10191480 A JP 10191480A JP 10191480 A JP10191480 A JP 10191480A JP S5727265 A JPS5727265 A JP S5727265A
Authority
JP
Japan
Prior art keywords
high voltage
driving
primary
developing bias
microcomputer
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
JP10191480A
Other languages
Japanese (ja)
Other versions
JPH0411864B2 (en
Inventor
Koki Kuroda
Koji Suzuki
Joji Nagahira
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 JP10191480A priority Critical patent/JPS5727265A/en
Publication of JPS5727265A publication Critical patent/JPS5727265A/en
Publication of JPH0411864B2 publication Critical patent/JPH0411864B2/ja
Granted legal-status Critical Current

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)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To make frequency components common, and to enhance noise resistance, by driving the oscillation circuit of a high voltage generating means in synchronism to clock pulses for driving a microcomputer. CONSTITUTION:A microcomputer 4 receives latent image surface potential, calculates primary and secondary charging current values, and an optimum developing bias value, and drives the high voltage transformers of primary and secondary high voltage sources 7, 9 through high voltage driving circuits 6, 8 to feed charging currents to primary and secondary chargers 16, 17. A developing bias driving circuit 10 drives a high voltage source 11 for developing bias to add a prescribed bias to a developing roller 18. On the other hand, clock pulses having proper frequency are delivered through buffer circuits to driving circuits 13, 14, 15 to start oscillation of each high voltage source 7, 9, 11.
JP10191480A 1980-07-25 1980-07-25 Copying apparatus Granted JPS5727265A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10191480A JPS5727265A (en) 1980-07-25 1980-07-25 Copying apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10191480A JPS5727265A (en) 1980-07-25 1980-07-25 Copying apparatus

Publications (2)

Publication Number Publication Date
JPS5727265A true JPS5727265A (en) 1982-02-13
JPH0411864B2 JPH0411864B2 (en) 1992-03-02

Family

ID=14313170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10191480A Granted JPS5727265A (en) 1980-07-25 1980-07-25 Copying apparatus

Country Status (1)

Country Link
JP (1) JPS5727265A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149582U (en) * 1984-09-05 1986-04-03
FR2589594A1 (en) * 1985-11-04 1987-05-07 Savin Corp CHARGE AND POLARIZATION APPARATUS FOR ELECTROPHOTOGRAPHIC COPIER

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52147756A (en) * 1976-06-04 1977-12-08 Ricoh Co Ltd Zero volt trigger method in ac load
JPS53119037A (en) * 1977-03-26 1978-10-18 Canon Inc Forming method of image
JPS53148921A (en) * 1977-05-31 1978-12-26 Canon Inc Power unit
JPS53149626A (en) * 1977-05-31 1978-12-27 Canon Inc Power source system
JPS54129457A (en) * 1978-03-31 1979-10-06 Ricoh Co Ltd Sc voltage control system
JPS5529228A (en) * 1978-08-17 1980-03-01 Mitsubishi Electric Corp Switching regulator for pcm device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52147756A (en) * 1976-06-04 1977-12-08 Ricoh Co Ltd Zero volt trigger method in ac load
JPS53119037A (en) * 1977-03-26 1978-10-18 Canon Inc Forming method of image
JPS53148921A (en) * 1977-05-31 1978-12-26 Canon Inc Power unit
JPS53149626A (en) * 1977-05-31 1978-12-27 Canon Inc Power source system
JPS54129457A (en) * 1978-03-31 1979-10-06 Ricoh Co Ltd Sc voltage control system
JPS5529228A (en) * 1978-08-17 1980-03-01 Mitsubishi Electric Corp Switching regulator for pcm device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6149582U (en) * 1984-09-05 1986-04-03
FR2589594A1 (en) * 1985-11-04 1987-05-07 Savin Corp CHARGE AND POLARIZATION APPARATUS FOR ELECTROPHOTOGRAPHIC COPIER

Also Published As

Publication number Publication date
JPH0411864B2 (en) 1992-03-02

Similar Documents

Publication Publication Date Title
ES8202161A1 (en) Process of, and means for charging an imaging element in an electrophotographic machine.
JPS5727265A (en) Copying apparatus
JPS5425830A (en) Image forming method in electrophotographic copiers and others
JPS5555373A (en) Pulse bias developing system for magnetic toner
JPS5662275A (en) Developing method
JPS56104363A (en) Transfer paper separating device in powder image transfer type electrophotographic copier
JPS51138442A (en) Magnetic toner
JPS5333154A (en) Developing and cleaning device for copier
ES8405963A1 (en) Method of making color images.
JPS6459264A (en) Image forming device
JPS5535331A (en) Transfer method of electrophotographic copier
JPS5647064A (en) Discharge quantity controlling method of discharger for electrophotography or electrostatic recording
JPS5660452A (en) Electrophotographic device
JPS56155966A (en) Electrophotographing method
JPS5696306A (en) Direct current regulated power supply device
JPS5589856A (en) Electrophotographic method
JPS5691254A (en) Electrophotographic apparatus
JPS57128352A (en) Developing method for electrostatic latent image
JPS6459276A (en) Image forming device
JPS5692555A (en) Transfer device of electrophotographic copier
JPS5677850A (en) Method of controlling surface potential of photoreceptor of electrophotographic copier
JPS57201262A (en) Ac corona generating circuit
JPS5616153A (en) Transferring-discharging system of electronic copier
JPS575058A (en) Charging controller
JPS5789782A (en) Improving method for transfer characteristic of elecronic copying machine