GB1017681A - Improvements in xerography - Google Patents

Improvements in xerography

Info

Publication number
GB1017681A
GB1017681A GB19048/62A GB1904862A GB1017681A GB 1017681 A GB1017681 A GB 1017681A GB 19048/62 A GB19048/62 A GB 19048/62A GB 1904862 A GB1904862 A GB 1904862A GB 1017681 A GB1017681 A GB 1017681A
Authority
GB
United Kingdom
Prior art keywords
composition
developer
xerox
negatively charged
particles
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
GB19048/62A
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 Ltd
Original Assignee
Rank Xerox 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 Rank Xerox Ltd filed Critical Rank Xerox Ltd
Publication of GB1017681A publication Critical patent/GB1017681A/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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/04027—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material and forming half-tone image
    • 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
    • G03G13/08—Developing using a solid developer, e.g. powder developer
    • 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
    • G03G9/10—Developers with toner particles characterised by carrier particles

Abstract

1,017,681. Electrophotographic developers. RANK XEROX Ltd. 12, Jun. 1962 [June 12, 1961], No. 19048/62. Heading G2H. A xerographic developer composition comprises a single species of divided toner particles and two different species of substantially larger carrier particles the toner being electrostatically adherent upon and positively charged by one of the carriers and electrostatically adherent upon and negatively charged by the other carrier. The developer composition may be formed by mixing Xerox (Registered Trade mark) Type 10 developer with Xerox reversal developer Type 10 which both include a common toner material but different carriers to produce opposite polarities. Alternatively, a mixture of Copyflo (Registered Trade Mark) P1 and Copyflo N1 developers may be used The composition can be applied at a single development step, such that negatively charged particles deposit in the areas indicated in Fig. 2B and the positively charged particles deposit in the areas indicated in Fig. 2C on a plate 10 carrying a halftone charge pattern. The use of such a composition for producing half-tone images is described in Specification 1,017,682. The developed image formed with the composition provides a development of solid areas uniform in visual appearance yet consisting of image areas of positively and negatively charged toner particles. A half-tone charge pattern may be applied to plate 10 in the manner described in Specification 1017683.
GB19048/62A 1961-06-12 1962-06-12 Improvements in xerography Expired GB1017681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US116429A US3212888A (en) 1961-06-12 1961-06-12 Method for developing latent electrostatic charge halftone images

Publications (1)

Publication Number Publication Date
GB1017681A true GB1017681A (en) 1966-01-19

Family

ID=22367153

Family Applications (3)

Application Number Title Priority Date Filing Date
GB36255/65A Expired GB1017683A (en) 1961-06-12 1962-06-12 Improvements in xerography
GB36254/65A Expired GB1017682A (en) 1961-06-12 1962-06-12 Improvements in xerography
GB19048/62A Expired GB1017681A (en) 1961-06-12 1962-06-12 Improvements in xerography

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB36255/65A Expired GB1017683A (en) 1961-06-12 1962-06-12 Improvements in xerography
GB36254/65A Expired GB1017682A (en) 1961-06-12 1962-06-12 Improvements in xerography

Country Status (3)

Country Link
US (1) US3212888A (en)
DE (2) DE1597875A1 (en)
GB (3) GB1017683A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519461A (en) * 1969-09-02 1970-07-07 Burroughs Corp Electrostatic dipole printing
US3808026A (en) * 1972-03-13 1974-04-30 Xerox Corp Liquid development of electrostatic latent image
US4331757A (en) * 1976-12-29 1982-05-25 Minolta Camera Kabushiki Kaisha Dry process developing method and device employed therefore
MX147918A (en) * 1977-03-31 1983-02-02 Xerox Corp IMPROVEMENTS IN APPARATUS AND METHOD TO PRODUCE A VISIBLE IMAGE ON A PHOTO CONDUCTIVE IMAGE FORMING SURFACE
JPS53123135A (en) * 1977-03-31 1978-10-27 Xerox Corp Method of marking insulating surface and device for forming visible image on insulating surface
US4142981A (en) * 1977-07-05 1979-03-06 Xerox Corporation Toner combination for carrierless development

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297691A (en) * 1939-04-04 1942-10-06 Chester F Carlson Electrophotography
US2576047A (en) * 1948-10-21 1951-11-20 Battelle Development Corp Method and apparatus for printing electrically
US2598732A (en) * 1949-03-09 1952-06-03 Haloid Co Electrophotography
US2808328A (en) * 1950-07-15 1957-10-01 Carlyle W Jacob Method and apparatus for xerographic reproduction
US2811465A (en) * 1952-04-30 1957-10-29 Rca Corp Electrostatic printing
US2965573A (en) * 1958-05-02 1960-12-20 Haloid Xerox Inc Xerographic developer
US3010842A (en) * 1955-08-29 1961-11-28 Xerox Corp Development of electrostatic images
NL213305A (en) * 1955-12-29
BE558736A (en) * 1956-06-27
US3045644A (en) * 1957-06-06 1962-07-24 Xerox Corp Two-color electrostatic printing apparatus
US2940847A (en) * 1957-07-03 1960-06-14 None i red
US3013890A (en) * 1958-07-08 1961-12-19 Xerox Corp Process of developing electrostatic images and composition therefor
US3078231A (en) * 1959-05-13 1963-02-19 Commw Of Australia Controlled developer for use in electro-photography and electro-radiography

Also Published As

Publication number Publication date
DE1284302B (en) 1968-11-28
GB1017682A (en) 1966-01-19
US3212888A (en) 1965-10-19
GB1017683A (en) 1966-01-19
DE1597875A1 (en) 1970-09-10

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