JPS57118256A - Electrostatic recorder - Google Patents

Electrostatic recorder

Info

Publication number
JPS57118256A
JPS57118256A JP56003254A JP325481A JPS57118256A JP S57118256 A JPS57118256 A JP S57118256A JP 56003254 A JP56003254 A JP 56003254A JP 325481 A JP325481 A JP 325481A JP S57118256 A JPS57118256 A JP S57118256A
Authority
JP
Japan
Prior art keywords
exposure
surface potential
photoreceptor
potential
measured
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
JP56003254A
Other languages
Japanese (ja)
Other versions
JPH035583B2 (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 JP56003254A priority Critical patent/JPS57118256A/en
Priority to US06/338,045 priority patent/US4511240A/en
Publication of JPS57118256A publication Critical patent/JPS57118256A/en
Publication of JPH035583B2 publication Critical patent/JPH035583B2/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
    • 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/065—Arrangements for controlling the potential of the developing electrode

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Developing For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To obtain adequate images free from any photographic fog and degradation in density without dependency upon the states of a photoreceptor by determining exposure in accordance with the surface potential of the photoreceptor, and determining and applying DC bias voltage in accordance with the surface potential of the photoreceptor after this exposure. CONSTITUTION:Prior to image recording, a blank exposure lamp 6 is turned on and off and the potential in the dark parts and bright part is detected with a surface potential sensor 7. The measured value is converted from analog to digital and is processed with a microcomputer, whereby correct electrostatic charging quantity is controlled. Following to this, the potential in the bright part is measured with the sensor 7 after exposure of a photosensitive drum by using a standard white plate, and is processed with the microcomputer in the same manner as mentioned above, whereby exposure is controlled. This exposure control is repeated thrice, and the determined correct exposure is irradiated to the photosensitive drum, thence the surface potential VL2 in the bright parts is measured, and after an arithmetic operation is so made as to apply +100V to this VL2, a DC developing bias circuit 20 is driven to superpose AC bias further to this, value, which is applied on a developing roller 5.
JP56003254A 1981-01-13 1981-01-14 Electrostatic recorder Granted JPS57118256A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56003254A JPS57118256A (en) 1981-01-14 1981-01-14 Electrostatic recorder
US06/338,045 US4511240A (en) 1981-01-13 1982-01-08 Electrostatic recording apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56003254A JPS57118256A (en) 1981-01-14 1981-01-14 Electrostatic recorder

Publications (2)

Publication Number Publication Date
JPS57118256A true JPS57118256A (en) 1982-07-23
JPH035583B2 JPH035583B2 (en) 1991-01-25

Family

ID=11552323

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56003254A Granted JPS57118256A (en) 1981-01-13 1981-01-14 Electrostatic recorder

Country Status (1)

Country Link
JP (1) JPS57118256A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317339A (en) * 1976-07-30 1978-02-17 Canon Inc Method and device for stabilizing surface potential
JPS53136838A (en) * 1977-05-04 1978-11-29 Ricoh Co Ltd Automatic controlling method of image quality in transfer type electrostatic copier
JPS5498624A (en) * 1977-12-27 1979-08-03 Ricoh Co Ltd Exposure controller of copier
JPS5529862A (en) * 1978-08-24 1980-03-03 Canon Inc Electrocopying apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5317339A (en) * 1976-07-30 1978-02-17 Canon Inc Method and device for stabilizing surface potential
JPS53136838A (en) * 1977-05-04 1978-11-29 Ricoh Co Ltd Automatic controlling method of image quality in transfer type electrostatic copier
JPS5498624A (en) * 1977-12-27 1979-08-03 Ricoh Co Ltd Exposure controller of copier
JPS5529862A (en) * 1978-08-24 1980-03-03 Canon Inc Electrocopying apparatus

Also Published As

Publication number Publication date
JPH035583B2 (en) 1991-01-25

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