US3798049A - Method for the development of latent electrostatic images - Google Patents

Method for the development of latent electrostatic images Download PDF

Info

Publication number
US3798049A
US3798049A US00241824A US3798049DA US3798049A US 3798049 A US3798049 A US 3798049A US 00241824 A US00241824 A US 00241824A US 3798049D A US3798049D A US 3798049DA US 3798049 A US3798049 A US 3798049A
Authority
US
United States
Prior art keywords
liquid
toner particles
roller
paste
thixotropic
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 - Lifetime
Application number
US00241824A
Other languages
English (en)
Inventor
H Kosche
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3798049A publication Critical patent/US3798049A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/06—Developing
    • G03G13/10—Developing using a liquid developer, e.g. liquid suspension
    • 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
    • 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
    • G03G9/12—Developers with toner particles in liquid developer mixtures

Definitions

  • a developer system which is particularly effective is attained. It is capable of reproducing images from extremely weak electrostatic charges which can no longer be developed with non-polarized toner systems, and can operate by free surface charge attraction only, i.e., without an imposed electric field.
  • applicator materials with a dielectric constant between and 10,000 are particularly valuable. They may naturally also be used with more liquid developers.
  • the perovskites or similar substances such as (IV) titanates of bivalent metals are preferred.
  • these materials usually have a dielectric constant between about 500 and 1,000, although it may range anywhere from l00 up to 10,000.
  • the entire body of the applicator need not necessarily be composed of such materials, but it may suffice to have the surface of the applicator formed by the high dielectric material.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)
US00241824A 1971-04-09 1972-04-06 Method for the development of latent electrostatic images Expired - Lifetime US3798049A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT307571A AT319751B (de) 1971-04-09 1971-04-09 Verfahren zur Entwicklung elektrostatischer Ladungsbilder

Publications (1)

Publication Number Publication Date
US3798049A true US3798049A (en) 1974-03-19

Family

ID=3544903

Family Applications (1)

Application Number Title Priority Date Filing Date
US00241824A Expired - Lifetime US3798049A (en) 1971-04-09 1972-04-06 Method for the development of latent electrostatic images

Country Status (6)

Country Link
US (1) US3798049A (OSRAM)
JP (1) JPS4849442A (OSRAM)
AT (1) AT319751B (OSRAM)
BE (1) BE781565A (OSRAM)
DE (1) DE2212931A1 (OSRAM)
FR (1) FR2136216A5 (OSRAM)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236812A (en) * 1979-03-07 1980-12-02 Coulter Systems Corporation Image recording method for electrophotographic film
US5064738A (en) * 1989-11-20 1991-11-12 Eastman Kodak Company Liquid toning process and apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0642087B2 (ja) * 1984-05-31 1994-06-01 富士ゼロックス株式会社 現像方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084043A (en) * 1959-05-07 1963-04-02 Xerox Corp Liquid development of electrostatic latent images
US3292572A (en) * 1963-01-16 1966-12-20 Bayer Ag Developing device
US3425829A (en) * 1960-11-08 1969-02-04 Agfa Gevaert Nv Electrophotographic recording process
US3432329A (en) * 1963-05-17 1969-03-11 Gevaert Photo Prod Nv Erasure-proof development of electrostatic images

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3084043A (en) * 1959-05-07 1963-04-02 Xerox Corp Liquid development of electrostatic latent images
US3425829A (en) * 1960-11-08 1969-02-04 Agfa Gevaert Nv Electrophotographic recording process
US3292572A (en) * 1963-01-16 1966-12-20 Bayer Ag Developing device
US3432329A (en) * 1963-05-17 1969-03-11 Gevaert Photo Prod Nv Erasure-proof development of electrostatic images

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236812A (en) * 1979-03-07 1980-12-02 Coulter Systems Corporation Image recording method for electrophotographic film
US5064738A (en) * 1989-11-20 1991-11-12 Eastman Kodak Company Liquid toning process and apparatus

Also Published As

Publication number Publication date
BE781565A (fr) 1972-07-17
FR2136216A5 (OSRAM) 1972-12-22
JPS4849442A (OSRAM) 1973-07-12
AT319751B (de) 1975-01-10
DE2212931A1 (de) 1972-10-19

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