JPS5785062A - Control device for copying density of electrophotographic copier - Google Patents

Control device for copying density of electrophotographic copier

Info

Publication number
JPS5785062A
JPS5785062A JP55160853A JP16085380A JPS5785062A JP S5785062 A JPS5785062 A JP S5785062A JP 55160853 A JP55160853 A JP 55160853A JP 16085380 A JP16085380 A JP 16085380A JP S5785062 A JPS5785062 A JP S5785062A
Authority
JP
Japan
Prior art keywords
image
density
image density
paper
copying
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
JP55160853A
Other languages
Japanese (ja)
Inventor
Fumio Nakaya
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox 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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP55160853A priority Critical patent/JPS5785062A/en
Publication of JPS5785062A publication Critical patent/JPS5785062A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

PURPOSE:To obtain always constant copying density by detecting the image density after fixing from paper, and controlling the respective parts of a copying machine body in such a way that the image density is made correct by means of the signal obtained by this. CONSTITUTION:Light from a light source 4 irradiates an original 3, and forms an electrostatic latent image on a photoreceptor 6 by means of an optical system 5. At this time, the target 7 installed near an original plating plate 2 is also simultaneously exposed and a target image 7a is formed in the non-image part of the photoreceptor 6. The latent image of the original 3 and the target image 7a are transferred to paper 9 after developing 8, and the target image 7a of this time is transferred small in a place where no influences are given to copying images such as the leading or trailing end of the paper 9. This target image 7a is detected of its image density as an electric signal by an image density detector 13, and the resultant signal is inputted to a control circuit of a copying machine body 1, by which the respective parts of the body 1, for example, exposure, the bias potential of a developing device 8, the electrostatic charging quantity of a transfer device 14, and the fixing temp. of a fixing device 12, are so controlled that the correct image density is obtained.
JP55160853A 1980-11-17 1980-11-17 Control device for copying density of electrophotographic copier Pending JPS5785062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55160853A JPS5785062A (en) 1980-11-17 1980-11-17 Control device for copying density of electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55160853A JPS5785062A (en) 1980-11-17 1980-11-17 Control device for copying density of electrophotographic copier

Publications (1)

Publication Number Publication Date
JPS5785062A true JPS5785062A (en) 1982-05-27

Family

ID=15723801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55160853A Pending JPS5785062A (en) 1980-11-17 1980-11-17 Control device for copying density of electrophotographic copier

Country Status (1)

Country Link
JP (1) JPS5785062A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6049351A (en) * 1983-08-27 1985-03-18 Mita Ind Co Ltd Image output device
JPS6223075A (en) * 1985-07-24 1987-01-31 Hitachi Ltd Recorder
JPS63173068A (en) * 1987-01-13 1988-07-16 Fuji Xerox Co Ltd Adjusting method for copy density
US6151460A (en) * 1998-05-21 2000-11-21 Brother Kogyo Kabushiki Kaisha Image recording device having a developing bias voltage output circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6049351A (en) * 1983-08-27 1985-03-18 Mita Ind Co Ltd Image output device
JPS6223075A (en) * 1985-07-24 1987-01-31 Hitachi Ltd Recorder
JPS63173068A (en) * 1987-01-13 1988-07-16 Fuji Xerox Co Ltd Adjusting method for copy density
US6151460A (en) * 1998-05-21 2000-11-21 Brother Kogyo Kabushiki Kaisha Image recording device having a developing bias voltage output circuit

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