GB1382710A - Electrostatic printing machine - Google Patents

Electrostatic printing machine

Info

Publication number
GB1382710A
GB1382710A GB2675672A GB2675672A GB1382710A GB 1382710 A GB1382710 A GB 1382710A GB 2675672 A GB2675672 A GB 2675672A GB 2675672 A GB2675672 A GB 2675672A GB 1382710 A GB1382710 A GB 1382710A
Authority
GB
United Kingdom
Prior art keywords
printing machine
june
transfer
developing
original
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
GB2675672A
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 Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of GB1382710A publication Critical patent/GB1382710A/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)
  • Developing For Electrophotography (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Color Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)

Abstract

1382710 Developing latent images XEROX CORP 8 June 1972 [11 June 1971] 26756/72 Heading G2H In an electro-photographic printing machine which employs a magnetic brush device for developing the latent images on a photo-conductive member means are provided for selectively imposing one of three different electrical potentials between the magnetic brush device and the latent image whereby transfer of toner may be controlled according to whether the original being copied is of high, low or medium density. Selection of the potential for a low density original may also cause de-energization of the pre-transfer coratron.
GB2675672A 1971-06-11 1972-06-08 Electrostatic printing machine Expired GB1382710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00152138A US3805739A (en) 1971-06-11 1971-06-11 Controlling multiple voltage levels for electrostatic printing

Publications (1)

Publication Number Publication Date
GB1382710A true GB1382710A (en) 1975-02-05

Family

ID=22541663

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2675672A Expired GB1382710A (en) 1971-06-11 1972-06-08 Electrostatic printing machine

Country Status (5)

Country Link
US (1) US3805739A (en)
CA (1) CA972552A (en)
DE (1) DE2227709C3 (en)
GB (1) GB1382710A (en)
NL (1) NL170893C (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510070B2 (en) * 1973-05-10 1980-03-13
US3901189A (en) * 1974-01-28 1975-08-26 Xerox Corp Magnetic brush developing apparatus
USRE31964E (en) * 1974-06-17 1985-08-06 Savin Corporation Automatic development electrode bias control system
US3996892A (en) * 1975-02-24 1976-12-14 Xerox Corporation Spatially programmable electrode-type roll for electrostatographic processors and the like
US3981268A (en) * 1975-06-11 1976-09-21 Fuji Xerox Co., Ltd. Device for controlling electric potential applied to developing electrode in an electrophotographic duplicator
US4149487A (en) * 1977-08-30 1979-04-17 Xerox Corporation Xerographic machine with infinitely variable developer bias
JPS5497038A (en) * 1978-01-17 1979-07-31 Konishiroku Photo Ind Co Ltd Image density controller for zerographic copier
JPS5497039A (en) * 1978-01-17 1979-07-31 Konishiroku Photo Ind Co Ltd Bias voltage change-over circuit for image density control of copier
US4755850A (en) * 1981-01-13 1988-07-05 Canon Kabushiki Kaisha Electrostatic recording apparatus including a controlled developer device
JPS5842070A (en) * 1981-09-08 1983-03-11 Canon Inc Picture forming device
NL8200825A (en) * 1982-03-02 1983-10-03 Oce Nederland Bv ELECTROPHOTOGRAPHIC COPIER.
US4500198A (en) * 1982-12-10 1985-02-19 International Business Machines Corporation Multiple roller magnetic brush developer having development electrode voltage switching
US4496644A (en) * 1983-02-28 1985-01-29 Eastman Kodak Company Electric field adjustment for magnetic brushes
JPH0690556B2 (en) * 1985-06-18 1994-11-14 富士通株式会社 Electrophotographic recording device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890968A (en) * 1955-06-02 1959-06-16 Rca Corp Electrostatic printing process and developer composition therefor
US3037478A (en) * 1957-10-23 1962-06-05 American Photocopy Equip Co Apparatus for developing electrophotographic sheet
US3152012A (en) * 1960-12-19 1964-10-06 Ibm Apparatus for the development of electrostatic images
GB1063203A (en) * 1962-10-02 1967-03-30 Australia Res Lab Method of and means for the transfer of images
US3185051A (en) * 1962-10-16 1965-05-25 Xerox Corp Xerographic method
US3219014A (en) * 1962-12-04 1965-11-23 Xerox Corp Mechanical shield to protect magnetic core in xerographic developing apparatus
BE655347A (en) * 1963-11-05
US3654893A (en) * 1970-05-01 1972-04-11 Eastman Kodak Co Automatic bias control for electrostatic development

Also Published As

Publication number Publication date
NL170893B (en) 1982-08-02
CA972552A (en) 1975-08-12
DE2227709A1 (en) 1972-12-28
US3805739A (en) 1974-04-23
DE2227709C3 (en) 1981-09-17
NL170893C (en) 1983-01-03
NL7207843A (en) 1972-12-13
DE2227709B2 (en) 1981-01-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years