FR2262821A1 - Electrostatic copying process and equipment - having improved contact between developer particles and surface carrying latent image - Google Patents

Electrostatic copying process and equipment - having improved contact between developer particles and surface carrying latent image

Info

Publication number
FR2262821A1
FR2262821A1 FR7505956A FR7505956A FR2262821A1 FR 2262821 A1 FR2262821 A1 FR 2262821A1 FR 7505956 A FR7505956 A FR 7505956A FR 7505956 A FR7505956 A FR 7505956A FR 2262821 A1 FR2262821 A1 FR 2262821A1
Authority
FR
France
Prior art keywords
latent image
developer
roller
image
electrostatic copying
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.)
Granted
Application number
FR7505956A
Other languages
French (fr)
Other versions
FR2262821B1 (en
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.)
Gestetner Byfleet Ltd
Original Assignee
Gestetner Byfleet 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 Gestetner Byfleet Ltd filed Critical Gestetner Byfleet Ltd
Publication of FR2262821A1 publication Critical patent/FR2262821A1/en
Application granted granted Critical
Publication of FR2262821B1 publication Critical patent/FR2262821B1/fr
Granted 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
    • G03G15/0801—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer for cascading

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

The electrostatic copying process is one in which a latent image is developed by a two component developer. It consists of passing the surface carrying the latent image past a rotatable roller at a distance which is a fraction greater than the diameter of the particles carrying the developer while simultaneously feeding the developer to the gap between the roller and the image-carrying surface. Preferably the roller is electrically conductive and connected to a voltage source to serve as developing electrode. In order to prevent damage of the image-carrying surface by particle agglomeration, the roller is flexible. By this process the developer particles are subjected to strong relative motion so that their contact with the image-carrier can be controllably increased.
FR7505956A 1974-03-01 1975-02-26 Electrostatic copying process and equipment - having improved contact between developer particles and surface carrying latent image Granted FR2262821A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB945774 1974-03-01
GB3721874 1974-08-23

Publications (2)

Publication Number Publication Date
FR2262821A1 true FR2262821A1 (en) 1975-09-26
FR2262821B1 FR2262821B1 (en) 1978-02-24

Family

ID=26242952

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7505956A Granted FR2262821A1 (en) 1974-03-01 1975-02-26 Electrostatic copying process and equipment - having improved contact between developer particles and surface carrying latent image

Country Status (7)

Country Link
JP (1) JPS50143527A (en)
AU (1) AU7841775A (en)
DE (1) DE2508460A1 (en)
DK (1) DK81675A (en)
ES (1) ES435229A1 (en)
FR (1) FR2262821A1 (en)
NL (1) NL7502272A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057871A (en) * 1989-03-16 1991-10-15 Fujitsu Limited Developing device having a conductive porous toner-removing roller
US5076201A (en) * 1989-03-16 1991-12-31 Fujitsu Limited Developing device used in electrophotographic field and method of producing developing roller incorporated therein

Also Published As

Publication number Publication date
NL7502272A (en) 1975-09-03
AU7841775A (en) 1976-08-26
ES435229A1 (en) 1976-12-01
DE2508460A1 (en) 1975-09-04
JPS50143527A (en) 1975-11-19
FR2262821B1 (en) 1978-02-24
DK81675A (en) 1975-11-03

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Legal Events

Date Code Title Description
ST Notification of lapse