GB827291A - Method and apparatus for developing an electrostatic latent image - Google Patents

Method and apparatus for developing an electrostatic latent image

Info

Publication number
GB827291A
GB827291A GB8029/56A GB802956A GB827291A GB 827291 A GB827291 A GB 827291A GB 8029/56 A GB8029/56 A GB 8029/56A GB 802956 A GB802956 A GB 802956A GB 827291 A GB827291 A GB 827291A
Authority
GB
United Kingdom
Prior art keywords
magnetic
developed
latent image
potential
magnetic carrier
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
GB8029/56A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 US496262A external-priority patent/US3117884A/en
Application filed by RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB827291A publication Critical patent/GB827291A/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • G03G15/0907—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush with bias voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

827,291. Developing electrostatic images. RADIO CORPORATION OF AMERICA. March 14, 1956 [March 23, 1955], No. 8029/56. Class 98(2) An electrostatic latent image is devel. oped with a mixture of developer powder and magnetic carrier particles applied under the influence of a magnetic field and a unidirectional electric field. As shown in Fig. 1, the latent image is developed on the photoconductive layer 41 by means of developer powder mixed with a magnetic carrier 23 which adheres to a magnet 21 to form a "brush", while a source of potential is connected between the magnet and a backing member 43. A positive or negative image may be obtained by reversing the potential by means of switch 33. In Fig. 2, the xerographic member is in the form of a paper web 51 having a photoconductive coating 53. The latter is given a uniform charge by means of a corona discharge 57, the sign of which charge may be reversed by switch 61. The charged web is exposed at 65 and developed by powder 24 applied by a magnetic brush consisting of a rotating magnetic core 20, connected to an opposite magnetic pole 45, and spaced discs 22 which hold the magnetic carrier 23. An electrical potential is applied between the earthed core 20 and a backing plate 44. The developed image is fixed by a heater 73.
GB8029/56A 1955-03-23 1956-03-14 Method and apparatus for developing an electrostatic latent image Expired GB827291A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US496262A US3117884A (en) 1955-03-23 1955-03-23 Electrostatic printing process and apparatus
CH206458X 1957-01-29

Publications (1)

Publication Number Publication Date
GB827291A true GB827291A (en) 1960-02-03

Family

ID=29585122

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8029/56A Expired GB827291A (en) 1955-03-23 1956-03-14 Method and apparatus for developing an electrostatic latent image

Country Status (6)

Country Link
AT (1) AT206458B (en)
BE (1) BE546297A (en)
CH (1) CH344088A (en)
DE (1) DE1024988B (en)
FR (1) FR1144794A (en)
GB (1) GB827291A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2975758A (en) * 1958-03-13 1961-03-21 Haloid Xerox Inc Apparatus for developing electrostatic images
NL244827A (en) * 1958-10-30
DE1497028C3 (en) * 1959-05-07 1973-11-29 Rank Xerox Ltd., London Electrophotographic process for the production of images particularly suitable for episcopic projection
DE1175991B (en) * 1959-10-15 1964-08-13 Wilhelm Ritzerfeld Device for generating xerographic images
DE1198202B (en) * 1960-03-18 1965-08-05 Zindler Lumoprint Kg Device for developing a thermal conductivity image
NL286305A (en) * 1961-12-16
NL288124A (en) * 1962-01-25
DE1196962B (en) * 1962-11-05 1965-07-15 Ece Elektrostatik Magnetic roller for developing electrostatic images
US3369917A (en) * 1963-09-10 1968-02-20 Daniel B. Granzow Magnetic brush development of electrostatic images utilizing a high voltage corona
US4527886A (en) * 1981-05-12 1985-07-09 Kyoto Ceramic Co., Ltd. Electrophotographic recording apparatus having both functions of copying and printing
DE102010062651A1 (en) * 2010-12-08 2012-06-14 Ntg-Bau Gmbh Ballast stone removing device for use in e.g. track laying machine, for removing ballast stone of ballast body from normal-track sleeper during reconstruction of track body, has separation device designed as punching device with tool

Also Published As

Publication number Publication date
CH344088A (en) 1960-01-31
AT206458B (en) 1959-12-10
FR1144794A (en) 1957-10-17
DE1024988B (en) 1958-02-27
BE546297A (en)

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