GB1203811A - Method and apparatus for background reduction - Google Patents

Method and apparatus for background reduction

Info

Publication number
GB1203811A
GB1203811A GB45378/67A GB4537867A GB1203811A GB 1203811 A GB1203811 A GB 1203811A GB 45378/67 A GB45378/67 A GB 45378/67A GB 4537867 A GB4537867 A GB 4537867A GB 1203811 A GB1203811 A GB 1203811A
Authority
GB
United Kingdom
Prior art keywords
image
image areas
particles
developed
support
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
GB45378/67A
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 GB1203811A publication Critical patent/GB1203811A/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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/169—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer with means for preconditioning the toner image before the transfer
    • 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
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/001—Electric or magnetic imagery, e.g., xerography, electrography, magnetography, etc. Process, composition, or product
    • Y10S430/102—Electrically charging radiation-conductive surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Printing Methods (AREA)
  • Fixing For Electrophotography (AREA)
  • Cleaning In Electrography (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

1203811 Transferring developed images RANK XEROX Ltd 5 Oct 1967 [11 Oct 1966] 45378/67 Headings B6C and CA7 Background is reduced by applying to a developed image an electrostatic charge of a polarity opposite support, the particles in non- image areas remaining on the support. In another embodiment, the particles in non-image areas may be removed by a transfer step before transfer of the developed image to the final support (30) Fig. 7 (not shown) to that of the toner particles in image areas, so that toner particles in non- image areas i.e. those forming background become oppositely charged to those in image areas. Upon subsequent transfer of the developed image to a final support 24 only the particles in the image areas leave the image.
GB45378/67A 1966-10-11 1967-10-05 Method and apparatus for background reduction Expired GB1203811A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58582566A 1966-10-11 1966-10-11

Publications (1)

Publication Number Publication Date
GB1203811A true GB1203811A (en) 1970-09-03

Family

ID=24343111

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45378/67A Expired GB1203811A (en) 1966-10-11 1967-10-05 Method and apparatus for background reduction

Country Status (10)

Country Link
US (1) US3444369A (en)
AT (1) AT288863B (en)
BE (1) BE704919A (en)
CH (1) CH487438A (en)
DE (1) DE1597884B2 (en)
DK (1) DK119094B (en)
ES (1) ES345918A1 (en)
GB (1) GB1203811A (en)
NL (1) NL152375B (en)
SE (1) SE337986B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3628950A (en) * 1969-12-10 1971-12-21 Xerox Corp Improved method of removing the residual toner particles from a photoconductive surface
US3972611A (en) * 1970-03-18 1976-08-03 Canon Kabushiki Kaisha Apparatus for transferring images produced by liquid developer
JPS4926901B1 (en) * 1970-12-10 1974-07-12
US3779749A (en) * 1971-09-10 1973-12-18 Fuji Photo Film Co Ltd Method of charging in electrophotography
BE789340A (en) * 1971-12-23 1973-03-27 Xerox Corp NEW METHODS AND APPARATUS FOR IMPROVING THE QUALITY OF XEROGRAPHIC IMAGES
US3984182A (en) * 1974-02-07 1976-10-05 Xerox Corporation Pretransfer conditioning for electrostatic printing
JPS5517111A (en) * 1978-07-21 1980-02-06 Hitachi Ltd Electrophotographic method
US4402591A (en) 1979-09-29 1983-09-06 Canon Kabushiki Kaisha Electrophotographic apparatus
US4265998A (en) * 1979-11-13 1981-05-05 International Business Machines Corporation Electrophotographic photoreceptive background areas cleaned by backcharge process
US5038177A (en) * 1988-12-15 1991-08-06 Xerox Corporation Selective pre-transfer corona transfer with light treatment for tri-level xerography
US5351113A (en) * 1994-01-10 1994-09-27 Xerox Corporation Pre-pretransfer treatment to increase transfer latitude in tri-level xerography
US5480751A (en) * 1994-06-30 1996-01-02 Xerox Corporation Tri-level background suppression scheme using an AC scorotron with front erase

Also Published As

Publication number Publication date
ES345918A1 (en) 1968-12-01
NL152375B (en) 1977-02-15
DE1597884A1 (en) 1970-10-01
CH487438A (en) 1970-03-15
SE337986B (en) 1971-08-23
NL6713356A (en) 1968-04-16
AT288863B (en) 1971-03-25
DE1597884B2 (en) 1976-11-04
BE704919A (en) 1968-02-15
US3444369A (en) 1969-05-13
DK119094B (en) 1970-11-09

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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)
PCNP Patent ceased through non-payment of renewal fee