EP0481852A3 - Electrophotographic copying machine and method for detecting density of original image thereof - Google Patents

Electrophotographic copying machine and method for detecting density of original image thereof Download PDF

Info

Publication number
EP0481852A3
EP0481852A3 EP19910402706 EP91402706A EP0481852A3 EP 0481852 A3 EP0481852 A3 EP 0481852A3 EP 19910402706 EP19910402706 EP 19910402706 EP 91402706 A EP91402706 A EP 91402706A EP 0481852 A3 EP0481852 A3 EP 0481852A3
Authority
EP
European Patent Office
Prior art keywords
original image
copying machine
electrophotographic copying
detecting density
density
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.)
Withdrawn
Application number
EP19910402706
Other languages
English (en)
Other versions
EP0481852A2 (fr
Inventor
Akihiro Takada
Akihiro Kondo
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.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial 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 Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Publication of EP0481852A2 publication Critical patent/EP0481852A2/fr
Publication of EP0481852A3 publication Critical patent/EP0481852A3/en
Withdrawn legal-status Critical Current

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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
    • G03G15/5025—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 original characteristics, e.g. contrast, density

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
EP19910402706 1990-10-19 1991-10-10 Electrophotographic copying machine and method for detecting density of original image thereof Withdrawn EP0481852A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2282742A JPH04156568A (ja) 1990-10-19 1990-10-19 原稿濃度読取方法
JP282742/90 1990-10-19

Publications (2)

Publication Number Publication Date
EP0481852A2 EP0481852A2 (fr) 1992-04-22
EP0481852A3 true EP0481852A3 (en) 1993-03-10

Family

ID=17656463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910402706 Withdrawn EP0481852A3 (en) 1990-10-19 1991-10-10 Electrophotographic copying machine and method for detecting density of original image thereof

Country Status (2)

Country Link
EP (1) EP0481852A3 (fr)
JP (1) JPH04156568A (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200391A (en) * 1977-08-26 1980-04-29 Ricoh Company, Ltd. Electrostatographic apparatus comprising document density sensing means
US4662738A (en) * 1983-07-13 1987-05-05 Canon Kabushiki Kaisha Density detecting apparatus which detects image density according to document size
US4711554A (en) * 1985-12-13 1987-12-08 Minolta Camera Kabushiki Kaisha Scanning type copying machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200391A (en) * 1977-08-26 1980-04-29 Ricoh Company, Ltd. Electrostatographic apparatus comprising document density sensing means
US4662738A (en) * 1983-07-13 1987-05-05 Canon Kabushiki Kaisha Density detecting apparatus which detects image density according to document size
US4711554A (en) * 1985-12-13 1987-12-08 Minolta Camera Kabushiki Kaisha Scanning type copying machine

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 308 (P-508)(2364) 21 October 1986 & JP-A-61 121 069 ( MINOLTA CAMERA CO LTD ) 9 June 1986 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 144 (P-284)(1581) 5 July 1984 & JP-A-59 042 551 ( CANON K.K. ) 9 March 1984 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 148 (P-366)(1871) 22 June 1985 & JP-A-60 026 367 ( CANON K.K. ) 9 February 1985 *

Also Published As

Publication number Publication date
EP0481852A2 (fr) 1992-04-22
JPH04156568A (ja) 1992-05-29

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