GB1024983A - Improvements in and relating to photoconductive development donor - Google Patents

Improvements in and relating to photoconductive development donor

Info

Publication number
GB1024983A
GB1024983A GB7638/63A GB763863A GB1024983A GB 1024983 A GB1024983 A GB 1024983A GB 7638/63 A GB7638/63 A GB 7638/63A GB 763863 A GB763863 A GB 763863A GB 1024983 A GB1024983 A GB 1024983A
Authority
GB
United Kingdom
Prior art keywords
web
layer
particles
charge
charged
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
GB7638/63A
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 GB1024983A publication Critical patent/GB1024983A/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
    • G03G9/00—Developers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

1,024,983. Electro-photographic processes. RANK-XEROX Ltd. Feb. 26, 1963 [March 2, 1962], No. 7638/63. Heading G2H. [Also in Division H1] in a method of developing a latent electrostatic image on a member 2 a donar member 5 having a photo-conductive insulating layer and loaded with electroscopic particles is brought into contiguous relation with the image bearing member with the particles between the members and the member 5 is then separated from the member 2, thereby forming a developed image on the member 2 conforming to the electrostatic charge. The member 2 which may be a layer of vitreous selenium is carried on a conductive drum 1. The outer surface of layer 2 is charged by an electrode 3 of a corona discharge and is then exposed by projector 27. Charged developer particles are picked up from the member 5 which is in the form of a photo-conductive insulating layer 24 overlying a conductive backing 25. The layer 24 is uniformly charged by a corotron and is then exposed to a light source 16 through a half tone screen 17,thereby breaking up the uniform charge into small areas of charge and no charge. The screen 17 may be moved at the same speed as the web 5 and for this purpose may be a driven endless belt. The web 5 passes loading station 18 where developer 20 is deposited on the web in accordance with the electrostatic charge pattern thereon. A strong light source 19 dissipates most of the electrostatic charge on the web while leaving the developer particles charged. Alternatively, the web may have a transparent backing and the layer 24 may be exposed through the backing. The particles are only held to the web by weak forces as the web passes over conductive roller 4 which are insufficient to counteract the attraction force of the electrostatic image on the layer 2 and the opposite charge induced in the web at the transfer point. Particles of developer are therefore transferred to the layer in the configuration of the electrostatic image thereon. In a modification, an endless donar web 5, Fig. 3 (not shown) is charged by a corotron 15, passes under a magnetic brush developer 21, and then under a strong light source 19.
GB7638/63A 1962-03-02 1963-02-26 Improvements in and relating to photoconductive development donor Expired GB1024983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US176996A US3216844A (en) 1962-03-02 1962-03-02 Method of developing electrostatic image with photoconductive donor member

Publications (1)

Publication Number Publication Date
GB1024983A true GB1024983A (en) 1966-04-06

Family

ID=22646755

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7638/63A Expired GB1024983A (en) 1962-03-02 1963-02-26 Improvements in and relating to photoconductive development donor

Country Status (2)

Country Link
US (1) US3216844A (en)
GB (1) GB1024983A (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332396A (en) * 1963-12-09 1967-07-25 Xerox Corp Xerographic developing apparatus with controlled corona means
US3405682A (en) * 1964-06-08 1968-10-15 Xerox Corp Xerographic development apparatus with web loading means to remove residual developer
US3442645A (en) * 1964-06-12 1969-05-06 Rca Corp Electrophotographic method
US3613636A (en) * 1969-03-10 1971-10-19 Xerox Corp Electrographic developer
US3685488A (en) * 1970-07-10 1972-08-22 Xerox Corp Xerographic development
US4021586A (en) * 1970-10-08 1977-05-03 Canon Kabushiki Kaisha Method of and means for the development of electrostatic images
US3739748A (en) * 1970-12-15 1973-06-19 Xerox Corp Donor for touchdown development
US3759222A (en) * 1971-03-04 1973-09-18 Xerox Corp Microfield donor with continuously reversing microfields
US3906121A (en) * 1971-05-25 1975-09-16 Xerox Corp Electrostatic development method using magnetic brush configuration transport
US3998185A (en) * 1975-02-03 1976-12-21 Xerox Corporation Microfield donors with toner agitation and the methods for their manufacture
US4017648A (en) * 1975-02-03 1977-04-12 Xerox Corporation Toner agitation through microfield donor
US5030530A (en) * 1985-10-31 1991-07-09 Josef Matkan Method of electrostatic color proofing
EP0246362B1 (en) * 1986-05-15 1990-12-27 Agfa-Gevaert N.V. A method and apparatus for the development of an electrostatic charge image
EP0343167A4 (en) * 1987-01-15 1990-12-05 Stork Colorproofing B.V. Image reversal process
US4876172A (en) * 1987-05-20 1989-10-24 The Mead Corporation Imaging method employing photoadhesive microparticles
JPH01204662A (en) * 1988-02-12 1989-08-17 Olympus Optical Co Ltd Laser system
DE3808954A1 (en) * 1988-03-17 1989-09-28 Du Pont Deutschland METHOD AND DEVICE FOR APPLYING A TONER LAYER

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829025A (en) * 1952-04-18 1958-04-01 John E Clemens High speed apparatus for recording intelligence
US2901348A (en) * 1953-03-17 1959-08-25 Haloid Xerox Inc Radiation sensitive photoconductive member
US2895847A (en) * 1953-12-21 1959-07-21 Battelle Development Corp Electric image development
US3052540A (en) * 1954-06-02 1962-09-04 Rca Corp Dye sensitization of electrophotographic materials
US2901374A (en) * 1955-05-04 1959-08-25 Battelle Development Corp Development of electrostatic image and apparatus therefor
US2890968A (en) * 1955-06-02 1959-06-16 Rca Corp Electrostatic printing process and developer composition therefor
US2996400A (en) * 1956-08-30 1961-08-15 Eastman Kodak Co Positive and negative electroprinting
US2968552A (en) * 1956-10-01 1961-01-17 Haloid Xerox Inc Xerographic apparatus and method
US3015304A (en) * 1957-10-02 1962-01-02 Xerox Corp Electrostatic image reproduction
US3041166A (en) * 1958-02-12 1962-06-26 Xerox Corp Xerographic plate and method
US2976144A (en) * 1958-10-24 1961-03-21 Rca Corp Electrophotography

Also Published As

Publication number Publication date
US3216844A (en) 1965-11-09

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