DE69809829D1 - Untergrunderkennung und Kompensation - Google Patents

Untergrunderkennung und Kompensation

Info

Publication number
DE69809829D1
DE69809829D1 DE69809829T DE69809829T DE69809829D1 DE 69809829 D1 DE69809829 D1 DE 69809829D1 DE 69809829 T DE69809829 T DE 69809829T DE 69809829 T DE69809829 T DE 69809829T DE 69809829 D1 DE69809829 D1 DE 69809829D1
Authority
DE
Germany
Prior art keywords
compensation
background detection
detection
background
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.)
Expired - Fee Related
Application number
DE69809829T
Other languages
English (en)
Other versions
DE69809829T2 (de
Inventor
Guru B Raj
Roger W Budnik
James M Pacer
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of DE69809829D1 publication Critical patent/DE69809829D1/de
Application granted granted Critical
Publication of DE69809829T2 publication Critical patent/DE69809829T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means
    • 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
    • G03G15/5041—Detecting a toner image, e.g. density, toner coverage, using a test patch
DE69809829T 1997-04-09 1998-04-07 Untergrunderkennung und Kompensation Expired - Fee Related DE69809829T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/831,632 US5822662A (en) 1997-04-09 1997-04-09 Background detection and compensation

Publications (2)

Publication Number Publication Date
DE69809829D1 true DE69809829D1 (de) 2003-01-16
DE69809829T2 DE69809829T2 (de) 2003-04-10

Family

ID=25259513

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69809829T Expired - Fee Related DE69809829T2 (de) 1997-04-09 1998-04-07 Untergrunderkennung und Kompensation

Country Status (4)

Country Link
US (1) US5822662A (de)
EP (1) EP0871080B1 (de)
JP (1) JPH10282743A (de)
DE (1) DE69809829T2 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5903796A (en) * 1998-03-05 1999-05-11 Xerox Corporation P/R process control patch uniformity analyzer
US6166550A (en) * 1998-11-16 2000-12-26 Xerox Corporation Charge measuring instrument
US6320387B1 (en) 1998-11-16 2001-11-20 Xerox Corporation Charge measuring instrument for flexible materials
US6650848B1 (en) 2000-08-01 2003-11-18 Heidelberger Druckmaschine Ag Image-forming device having on-line image quality assessment and related method

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348099A (en) * 1980-04-07 1982-09-07 Xerox Corporation Closed loop control of reproduction machine
US4502778A (en) * 1982-12-27 1985-03-05 International Business Machines Corporation System for monitoring and controlling electrophotographic toner operation
US4553033A (en) * 1983-08-24 1985-11-12 Xerox Corporation Infrared reflectance densitometer
JPS6111765A (ja) * 1984-06-26 1986-01-20 Konishiroku Photo Ind Co Ltd 静電記録装置
US4724461A (en) * 1987-04-06 1988-02-09 Eastman Kodak Company Dynamic process control for electrostatographic machines
JP2889289B2 (ja) * 1989-10-06 1999-05-10 株式会社リコー 画像形成制御方法
JPH04250479A (ja) * 1991-01-28 1992-09-07 Ricoh Co Ltd 画像濃度制御方法
US5122835A (en) * 1991-05-06 1992-06-16 Eastman Kodak Company Compensating densitometer readings for drifts and dusting
US5210572A (en) * 1991-09-05 1993-05-11 Xerox Corporation Toner dispensing rate adjustment using the slope of successive ird readings
JPH06109643A (ja) * 1992-09-24 1994-04-22 Toshiba Corp 画像形成装置
US5416564A (en) * 1994-02-04 1995-05-16 Xerox Corporatin Xerographic process control using developer to photoreceptor current sensing for grid voltage adjust
US5383005A (en) * 1994-02-04 1995-01-17 Xerox Corporation Xerographic process control using periodic electrostatic set up to automatically adjust charging potential
US5436705A (en) * 1994-04-18 1995-07-25 Xerox Corporation Adaptive process controller for electrophotographic printing

Also Published As

Publication number Publication date
US5822662A (en) 1998-10-13
EP0871080A1 (de) 1998-10-14
EP0871080B1 (de) 2002-12-04
DE69809829T2 (de) 2003-04-10
JPH10282743A (ja) 1998-10-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee