GB897903A - A method of reversing the image in xerography - Google Patents

A method of reversing the image in xerography

Info

Publication number
GB897903A
GB897903A GB42031/58A GB4203158A GB897903A GB 897903 A GB897903 A GB 897903A GB 42031/58 A GB42031/58 A GB 42031/58A GB 4203158 A GB4203158 A GB 4203158A GB 897903 A GB897903 A GB 897903A
Authority
GB
United Kingdom
Prior art keywords
dispersed
developer
development
conductive
powders
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
GB42031/58A
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.)
Commonwealth of Australia
Original Assignee
Commonwealth of Australia
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
Priority claimed from AU34435/58A external-priority patent/AU234620B2/en
Application filed by Commonwealth of Australia filed Critical Commonwealth of Australia
Publication of GB897903A publication Critical patent/GB897903A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G04B39/004—Watch crystals; Fastening or sealing of crystals; Clock glasses from a material other than glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/06—Developing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/22—Processes involving a combination of more than one step according to groups G03G13/02 - G03G13/20
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Color Television Image Signal Generators (AREA)
  • Liquid Developers In Electrophotography (AREA)

Abstract

897,903. Electrophotographic processes. AUSTRALIA, COMMONWEALTH OF. Dec. 30, 1958 [Jan. 13, 1958], No. 42031/58. Drawings to Specification. Class 98(2). A xerographic photoconducting surface is charged and exposed and the electrostatic charge pattern is reversed by re-charging after development with a substance which, on deposition, is sufficiently electrically conductive to discharge and partially or completely to prevent the parts which it covers from being re-charged on re-performing the charging operation. The surface is there after redeveloped, preferably with a dark pigment dispersed in an insulating liquid, to complete a reversal development by depositing developer on parts originally discharged by exposure. Preferably, the conductive developer substance is removed after re-development. Metallic powders such as aluminium or bronze powders can be used as conductive developer substances which prevent the surface which they cover from accepting any electrical charge. The powders are dispersed in insulating liquids. After re-development of the surface with a pigment or dye dispersed in an insulating liquid, the powder may be removed by rubbing, adhesive transfer or solution in nitric acid. Water soluble dyes such as Tartrazine dispersed in insulating liquids function as developer substances in the same way as metallic powders and may subsequently be removed by solution in water. The reversed electrostatic charge pattern is re-developed with a developer such as a resin treated phthalocyanine blue, carbon black, organic red pigment or lead chromate dispersed in an insulating liquid. The conductive developer layer can permit selective re-charging of the surface which it covers and thus provide for continuous tone reproduction. A conductive developer substance consisting of a mixture of zinc and barium white or metallic naphthenates and titanium dioxide dispersed in insulating liquids form such a layer.
GB42031/58A 1958-01-13 1958-12-30 A method of reversing the image in xerography Expired GB897903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU34435/58A AU234620B2 (en) 1958-01-13 A method of reversing the image in xerography

Publications (1)

Publication Number Publication Date
GB897903A true GB897903A (en) 1962-05-30

Family

ID=3721764

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42031/58A Expired GB897903A (en) 1958-01-13 1958-12-30 A method of reversing the image in xerography

Country Status (3)

Country Link
US (1) US3038799A (en)
DE (1) DE1141180B (en)
GB (1) GB897903A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507377A (en) * 1982-11-19 1985-03-26 Eastman Kodak Company Self-fixing liquid electrographic developers

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL251005A (en) * 1959-04-29
US3343956A (en) * 1961-09-29 1967-09-26 Rca Corp Electrostatic printing process wherein development is achieved by sequenctial application of carrier liquid and developer particles
US3220830A (en) * 1961-10-02 1965-11-30 Kenffel & Esser Company Method of developing a negative electrostatic latent image
US3259581A (en) * 1961-11-23 1966-07-05 Australia Res Lab Liquid developer for electrostatic images
USRE29357E (en) * 1964-02-17 1977-08-16 Xerox Corporation Image formation and development
US3518081A (en) * 1964-02-17 1970-06-30 Xerox Corp Image formation and development
US3816118A (en) * 1964-06-15 1974-06-11 Xerox Corp Electrophotographic element containing phthalocyanine
US3510297A (en) * 1966-05-05 1970-05-05 Ibm Process for producing negative transparencies
US3527684A (en) * 1967-03-13 1970-09-08 Eastman Kodak Co Method of increasing contrast in electrophoretic reproduction
US3634867A (en) * 1968-10-31 1972-01-11 Honeywell Inc Electrostatic recorder
US3888664A (en) * 1970-10-28 1975-06-10 Dennison Mfg Co Electrophotographic printing
US3859088A (en) * 1971-08-27 1975-01-07 Addressograph Multigraph Colored preprinting of electrostatic copy paper
US3901698A (en) * 1971-12-10 1975-08-26 Rank Xerox Ltd Method of reversal development using two electrostatic developers
US3808026A (en) * 1972-03-13 1974-04-30 Xerox Corp Liquid development of electrostatic latent image
US3833365A (en) * 1972-06-26 1974-09-03 Fuji Photo Film Co Ltd Electrostatic power coating method combined with an electrophotographic process
US3836381A (en) * 1972-10-02 1974-09-17 Secretary Supply Australia Method of developing a dielectric pattern on a semiconductor surface using a two-component developer
US4063946A (en) * 1973-01-22 1977-12-20 Rank Xerox Ltd. Electrophotographic color reproduction process employing photoconductive material with dual light fatigue properties
JPS49113838A (en) * 1973-03-05 1974-10-30
JPS5030531A (en) * 1973-06-25 1975-03-26
JPS63303372A (en) * 1987-06-03 1988-12-09 Minolta Camera Co Ltd Image forming method
US4897331A (en) * 1987-06-03 1990-01-30 Minolta Camera Kabushiki Kaisha Reversal image forming method
ATE92649T1 (en) * 1987-12-01 1993-08-15 Coulter Corp ELECTROSTATIC PRINT PRODUCTION BY COLOR SEPARATING A NEGATIVE.

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US992898A (en) * 1909-03-05 1911-05-23 Arthur Payne Preparation of surfaces suitable for photo-engraving or photo-etching.
US2647464A (en) * 1949-10-26 1953-08-04 Battelle Development Corp Electrography
US2758525A (en) * 1953-12-30 1956-08-14 Rca Corp Electrostatic photographic printing
DE1050189B (en) * 1955-01-03
US2817598A (en) * 1955-02-01 1957-12-24 Haloid Co Continuous tone reversal development process
US2914403A (en) * 1955-05-17 1959-11-24 Rca Corp Electrostatic printing
NL95463C (en) * 1955-12-29
US2817765A (en) * 1956-01-03 1957-12-24 Haloid Co Xerographic method
DE1071478B (en) * 1957-03-01
US2940847A (en) * 1957-07-03 1960-06-14 None i red

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4507377A (en) * 1982-11-19 1985-03-26 Eastman Kodak Company Self-fixing liquid electrographic developers

Also Published As

Publication number Publication date
US3038799A (en) 1962-06-12
DE1141180B (en) 1962-12-13

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