GB1258952A - - Google Patents

Info

Publication number
GB1258952A
GB1258952A GB1258952DA GB1258952A GB 1258952 A GB1258952 A GB 1258952A GB 1258952D A GB1258952D A GB 1258952DA GB 1258952 A GB1258952 A GB 1258952A
Authority
GB
United Kingdom
Prior art keywords
electrode
potential
development
july
electro
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
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 filed Critical
Publication of GB1258952A publication Critical patent/GB1258952A/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
    • G03G15/55—Self-diagnostics; Malfunction or lifetime display
    • G03G15/553—Monitoring or warning means for exhaustion or lifetime end of consumables, e.g. indication of insufficient copy sheet quantity for a job
    • 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
    • G03G15/065—Arrangements for controlling the potential of the developing electrode
    • 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
    • G03G15/55—Self-diagnostics; Malfunction or lifetime display

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Developing For Electrophotography (AREA)

Abstract

1,258,952. Electro-photographic copier. EASTMAN KODAK CO. July 25, 1969 [July 30, 1968], No.37405/69. Heading G2H. In an electro-photographic apparatus in which a photo-conductive member is recycled through a number of processing stations including a development station with a development electrode the bias applied to the electrode is increased automatically after a predetermined number of cycles thus compensating for deterioration of the photo-conductive member, due to residual toner, which causes development in background areas. As shown, the number of copies produced is determined by sensor 18 and counter 17 and a signal applied to motor 22 to vary the potential applied to magnetic brushes 9 and 10 after a predetermined number of cycles. The adjustment of the potential may be linked with other operating elements of the apparatus e.g. the drive chain on the toner dispenser and the variable potential may be applied to a backing electrode, Fig.4 (not shown).
GB1258952D 1968-07-30 1969-07-25 Expired GB1258952A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74879668A 1968-07-30 1968-07-30

Publications (1)

Publication Number Publication Date
GB1258952A true GB1258952A (en) 1972-01-05

Family

ID=25010964

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1258952D Expired GB1258952A (en) 1968-07-30 1969-07-25

Country Status (3)

Country Link
US (1) US3575505A (en)
FR (1) FR2013965A1 (en)
GB (1) GB1258952A (en)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784397A (en) * 1970-02-04 1974-01-08 Xerox Corp Imaging system
US3689144A (en) * 1971-01-28 1972-09-05 Arthur L Kaufman Electrostatic copying apparatus employing development on side of the imaging sheet opposite the photoconductive coating
US3836245A (en) * 1972-11-29 1974-09-17 Savin Business Machines Corp Copy machine having photoconductive belt
JPS5046334A (en) * 1973-08-30 1975-04-25
USRE31964E (en) * 1974-06-17 1985-08-06 Savin Corporation Automatic development electrode bias control system
JPS5441419B2 (en) * 1974-07-12 1979-12-08
JPS5132333A (en) * 1974-09-12 1976-03-18 Konishiroku Photo Ind
JPS5441502B2 (en) * 1974-10-21 1979-12-08
JPS5166835A (en) * 1974-12-06 1976-06-09 Konishiroku Photo Ind SEIDENKIROKUHONIOKERU TONAAHOKYUSEIGYOHOHO
JPS5174634A (en) * 1974-12-24 1976-06-28 Ricoh Kk Denshishashinno baiasugenzohoho
CA1103744A (en) * 1975-10-14 1981-06-23 Eastman Kodak Company Electrophotographic apparatus having compensation for rest-run performance variations
CA1091756A (en) * 1975-10-14 1980-12-16 Eastman Kodak Company Electrophotographic apparatus having compensation for changes in sensitometric properties of photoconductors
US4084901A (en) * 1976-03-25 1978-04-18 Pitney-Bowes, Inc. Copying machine
US4141645A (en) * 1977-07-29 1979-02-27 Eastman Kodak Company Toner concentration monitor
NL7909098A (en) * 1979-12-18 1981-07-16 Oce Nederland Bv CONTROL CIRCUIT IN AN ELECTROPHOTOGRAPHIC COPIER.
US4442790A (en) * 1982-09-29 1984-04-17 Eastman Kodak Company Magnetic brush development apparatus
EP0154041A1 (en) * 1984-02-28 1985-09-11 Agfa-Gevaert N.V. Improved method for the development of electrostatic images
EP0154042B1 (en) * 1984-02-28 1988-05-04 Agfa-Gevaert N.V. Improvements relating to the production of developed electrostatic images
JPH05281820A (en) * 1992-03-31 1993-10-29 Minolta Camera Co Ltd Image forming device
US5272503A (en) * 1992-09-02 1993-12-21 Xerox Corporation Replaceable sub-assemblies for electrostatographic reproducing machines
US5402214A (en) * 1994-02-23 1995-03-28 Xerox Corporation Toner concentration sensing system for an electrophotographic printer
JPH09204077A (en) * 1995-07-14 1997-08-05 Hitachi Koki Co Ltd Image forming device
US5786804A (en) 1995-10-06 1998-07-28 Hewlett-Packard Company Method and system for tracking attitude
US6950094B2 (en) * 1998-03-30 2005-09-27 Agilent Technologies, Inc Seeing eye mouse for a computer system
US6175375B1 (en) 2000-01-25 2001-01-16 Lexmark International, Inc. Method and apparatus for compensating for a darkness shift during the life of an electrophotographic printer cartridge
JP2005114754A (en) * 2003-10-02 2005-04-28 Brother Ind Ltd Image forming apparatus
US7639407B2 (en) * 2004-03-24 2009-12-29 Lexmark International, Inc. Systems for performing laser beam linearity correction and algorithms and methods for generating linearity correction tables from data stored in an optical scanner
US7375738B2 (en) * 2004-03-24 2008-05-20 Lexmark International, Inc. Electronic systems and methods for reducing laser beam process direction position errors
US7349123B2 (en) * 2004-03-24 2008-03-25 Lexmark International, Inc. Algorithms and methods for determining laser beam process direction position errors from data stored on a printhead
US7206012B2 (en) * 2004-03-24 2007-04-17 Lexmark International, Inc. Memory device on optical scanner and apparatus and method for storing characterizing information on the memory device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
US3345925A (en) * 1963-01-03 1967-10-10 Scm Corp Electrostatic printing and developing apparatus
US3332396A (en) * 1963-12-09 1967-07-25 Xerox Corp Xerographic developing apparatus with controlled corona means
US3331355A (en) * 1965-01-04 1967-07-18 Xerox Corp Xerographic developing apparatus

Also Published As

Publication number Publication date
US3575505A (en) 1971-04-20
FR2013965A1 (en) 1970-04-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years