JPS5776564A - Control system of copy surface image - Google Patents

Control system of copy surface image

Info

Publication number
JPS5776564A
JPS5776564A JP55153031A JP15303180A JPS5776564A JP S5776564 A JPS5776564 A JP S5776564A JP 55153031 A JP55153031 A JP 55153031A JP 15303180 A JP15303180 A JP 15303180A JP S5776564 A JPS5776564 A JP S5776564A
Authority
JP
Japan
Prior art keywords
image
concentration
power supply
copy surface
surface image
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
Application number
JP55153031A
Other languages
Japanese (ja)
Inventor
Hiroaki Ueno
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55153031A priority Critical patent/JPS5776564A/en
Publication of JPS5776564A publication Critical patent/JPS5776564A/en
Pending 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To obtain a copy surface image which is free from a soil on the texture, by forming an image of a reference concentration pattern before copying controlling both the electric charging amount and the exposure volume based on the result of comparison between the concentration signal and the reference signal. CONSTITUTION:A reference concentration pattern 4 is provided at the right to a scan initiation position 3, and an image is formed before carrying out a copying process. The concentration of this image is detected by an image concentration detector. Thus detection signal is compared with the reference signal at a comparator 16. Based on the result of this comparison, an exposure lamp power supply 18, a charged corona power supply 9 and a development bias power supply 20 are controlled via a control circuit 5. This the control is carried out according to the state of fatigue although the fatigue of a photoreceptor is considerable. Accordingly a copy surface image becomes free from any soil on the texture. In addition, the defects of a surface electrometer can be eliminated since no electrometer is used.
JP55153031A 1980-10-31 1980-10-31 Control system of copy surface image Pending JPS5776564A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55153031A JPS5776564A (en) 1980-10-31 1980-10-31 Control system of copy surface image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55153031A JPS5776564A (en) 1980-10-31 1980-10-31 Control system of copy surface image

Publications (1)

Publication Number Publication Date
JPS5776564A true JPS5776564A (en) 1982-05-13

Family

ID=15553449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55153031A Pending JPS5776564A (en) 1980-10-31 1980-10-31 Control system of copy surface image

Country Status (1)

Country Link
JP (1) JPS5776564A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204862A (en) * 1983-05-09 1984-11-20 Konishiroku Photo Ind Co Ltd Electrostatic recording device
JPS59232366A (en) * 1983-06-15 1984-12-27 Canon Inc Electrophotographic copying method
JPS63240569A (en) * 1987-03-27 1988-10-06 Minolta Camera Co Ltd Electrophotographic copying machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5022642A (en) * 1973-06-28 1975-03-11
JPS5555349A (en) * 1978-10-20 1980-04-23 Fuji Xerox Co Ltd Control unit of electrophotographic copier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5022642A (en) * 1973-06-28 1975-03-11
JPS5555349A (en) * 1978-10-20 1980-04-23 Fuji Xerox Co Ltd Control unit of electrophotographic copier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59204862A (en) * 1983-05-09 1984-11-20 Konishiroku Photo Ind Co Ltd Electrostatic recording device
JPS59232366A (en) * 1983-06-15 1984-12-27 Canon Inc Electrophotographic copying method
JPS63240569A (en) * 1987-03-27 1988-10-06 Minolta Camera Co Ltd Electrophotographic copying machine

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