GB1465556A - Method of testing a multi-colour electrophotographic printing machine - Google Patents

Method of testing a multi-colour electrophotographic printing machine

Info

Publication number
GB1465556A
GB1465556A GB1075674A GB1075674A GB1465556A GB 1465556 A GB1465556 A GB 1465556A GB 1075674 A GB1075674 A GB 1075674A GB 1075674 A GB1075674 A GB 1075674A GB 1465556 A GB1465556 A GB 1465556A
Authority
GB
United Kingdom
Prior art keywords
colour
copier
print
march
densities
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
Application number
GB1075674A
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 GB1465556A publication Critical patent/GB1465556A/en
Expired 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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Color Electrophotography (AREA)

Abstract

1465556 Electro-photography; controlling colour density XEROX CORP 11 March 1974 [12 March 1973] 10756/74 Headings G2H and G2X] The colour balance and the densities of the individual colour separation images in a multi-colour, multiple developer unit electro-photographic copier are monitored by comparing test prints of a preprepared standard card with the original. Adjustment of the toner concentrations in the developer units, the electrical biases applied in developing and the exposure is made in accordance with the results of the comparison. In particular, the developer units may be set to produce print densities which are not sensitive to the addition of replenishing toner to their developers. Preferably the standard card includes areas of differing colour, density and spectral qualities, so related to the properties of the copier that some do not print when the copier is correctly adjusted, others print correctly and a third group give an indication of colour mixing by displaying the reproduction of complementary colours.
GB1075674A 1973-03-12 1974-03-11 Method of testing a multi-colour electrophotographic printing machine Expired GB1465556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00340413A US3799668A (en) 1973-03-12 1973-03-12 Color standard and method of calibrating a multi-color electrophotographic printing machine

Publications (1)

Publication Number Publication Date
GB1465556A true GB1465556A (en) 1977-02-23

Family

ID=23333254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1075674A Expired GB1465556A (en) 1973-03-12 1974-03-11 Method of testing a multi-colour electrophotographic printing machine

Country Status (12)

Country Link
US (1) US3799668A (en)
JP (1) JPS49127629A (en)
AU (1) AU6640074A (en)
BE (1) BE812179A (en)
BR (1) BR7401854D0 (en)
CA (1) CA1036653A (en)
DE (1) DE2408999B2 (en)
FR (1) FR2221757B1 (en)
GB (1) GB1465556A (en)
IT (1) IT1011061B (en)
NL (1) NL7403346A (en)
ZA (1) ZA741562B (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5926957B2 (en) * 1973-12-28 1984-07-02 キヤノン株式会社 Color electrophotographic method
JPS54141645A (en) * 1978-04-26 1979-11-05 Ricoh Co Ltd Copy image adjusting method
US4277162A (en) * 1978-07-13 1981-07-07 Ricoh Company, Ltd. Electrophotographic apparatus comprising density sensor means
DE2911566A1 (en) * 1979-03-23 1980-10-02 Agfa Gevaert Ag METHOD AND DEVICE FOR CALIBRATING A COLOR COPIER
JPS6311933Y2 (en) * 1980-12-09 1988-04-06
US5191361A (en) * 1983-03-08 1993-03-02 Canon Kabushiki Kaisha Image reproducing system
DE3408336A1 (en) * 1983-03-08 1984-09-13 Canon K.K., Tokio/Tokyo IMAGE REPRODUCTION SYSTEM
DE3526878C2 (en) * 1984-07-27 1997-10-02 Konishiroku Photo Ind Device for generating a multicolor image
JPS61251748A (en) * 1985-04-30 1986-11-08 Norin Suisansyo Chikusan Shikenjo Production of standard beef color pattern
JPS61114451U (en) * 1985-12-25 1986-07-19
JPS63263877A (en) * 1987-04-21 1988-10-31 Konica Corp Color image forming device
US4853738A (en) * 1988-05-02 1989-08-01 Eastman Kodak Company Color quality improvements for electrophotographic copiers and printers
US4949135A (en) * 1989-08-17 1990-08-14 Eastman Kodak Company Visual based process control apparatus which is based on a near uniform human visual response space
US5502550A (en) * 1991-08-27 1996-03-26 Canon Kabushiki Kaisha Image forming apparatus and method
US5227815A (en) * 1991-09-06 1993-07-13 Xerox Corporation Color registration test pattern
US5486901A (en) * 1992-03-10 1996-01-23 Konica Corporation Color image recording apparatus with a detector to detect a superimposed toner image density and correcting its color balance
US5493321A (en) * 1993-02-25 1996-02-20 Minnesota Mining And Manufacturing Company Method and apparatus of characterization for photoelectric color proofing systems
JPH0758958A (en) * 1993-07-01 1995-03-03 Xerox Corp Gray pixel halftone system and control of toner position in color printing
US5604567A (en) * 1994-06-03 1997-02-18 Xerox Corporation Printer color and gray balance adjustment system
US5600409A (en) * 1996-02-20 1997-02-04 Xerox Corporation Optimal toner concentration sensing system for an electrophotographic printer
US6030066A (en) * 1997-10-31 2000-02-29 Hewlett-Packard Company Method and apparatus for ink jet printer color balance calibration and correction
EP1366480A1 (en) * 2001-02-28 2003-12-03 Roland Bachmann Painting sheet and a method for producing the same
US7184175B2 (en) * 2002-08-29 2007-02-27 Hewlett-Packard Development Company, L.P. System and method for color calibration
DE602007013601D1 (en) * 2006-12-01 2011-05-12 Unilever Nv GUIDE TO THE WHITE GRADE OF FABRIC
US11619897B2 (en) * 2021-06-15 2023-04-04 Brother Kogyo Kabushiki Kaisha Image forming apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529519A (en) * 1968-04-11 1970-09-22 Heath Co Method and apparatus for color adjusting in photographic printing
US3718397A (en) * 1971-05-14 1973-02-27 Unilux Graphics Inc Device for determining proper color balance in color printing
JPS5330338B2 (en) * 1972-04-20 1978-08-26

Also Published As

Publication number Publication date
AU6640074A (en) 1975-09-11
FR2221757A1 (en) 1974-10-11
DE2408999C3 (en) 1979-03-29
BR7401854D0 (en) 1974-12-24
JPS49127629A (en) 1974-12-06
NL7403346A (en) 1974-09-16
ZA741562B (en) 1975-03-26
BE812179A (en) 1974-07-01
DE2408999B2 (en) 1978-07-27
CA1036653A (en) 1978-08-15
DE2408999A1 (en) 1974-09-19
FR2221757B1 (en) 1977-03-04
US3799668A (en) 1974-03-26
IT1011061B (en) 1977-01-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee