GB1405564A - Magnetic brush for use in developing electrophotographic images - Google Patents

Magnetic brush for use in developing electrophotographic images

Info

Publication number
GB1405564A
GB1405564A GB5667073A GB5667073A GB1405564A GB 1405564 A GB1405564 A GB 1405564A GB 5667073 A GB5667073 A GB 5667073A GB 5667073 A GB5667073 A GB 5667073A GB 1405564 A GB1405564 A GB 1405564A
Authority
GB
United Kingdom
Prior art keywords
zone
magnetic brush
dec
container
screen
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
GB5667073A
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.)
WIFO FORSCHUNGSINST AG
Original Assignee
WIFO FORSCHUNGSINST AG
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 WIFO FORSCHUNGSINST AG filed Critical WIFO FORSCHUNGSINST AG
Publication of GB1405564A publication Critical patent/GB1405564A/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
    • G03G15/0921—Details concerning the magnetic brush roller structure, e.g. magnet configuration

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Brush Developing In Electrophotography (AREA)

Abstract

1405564 Electrographic development WIFO WISSENSCHAFTLICHES FORSCHUNGSINSTITUT AG 6 Dec 1973 [28 Dec 1972] 56670/73 Heading G2H An apparatus for the magnetic brush developing of an electrostatic image on a sheet 15, comprises a stationary permanent magnet 3 and a screen 4 of magnetizable material so disposed within a hollow rotatable cylinder 2 of non- magnetic material as to produce at its surface successive magnetic field zones: zone α of medium intensity sufficient to take up developer powder 5 (comprising magnetizable particles) from a container 10, zone γ of higher intensity for forming the magnetic brush 6, and zone # of sufficiently low intensity to shed developer powder from the cylinder 2 and return it to the container 10. The apparatus includes contrarotating stirrers 11 and a developer thickness controlling scraper 13. The screen 4 may be solid, as shown, or may comprise laminations of soft iron having outwardly fanned ends. The cylindrical permanent magnet 3 may be replaced by a bar magnet with a soft iron pole piece of semicircular cross-section.
GB5667073A 1972-12-28 1973-12-06 Magnetic brush for use in developing electrophotographic images Expired GB1405564A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1894672A CH549234A (en) 1972-12-28 1972-12-28 MAGNETIC BRUSH FOR DEVELOPING ELECTROSTATIC IMAGES WITH DEVELOPER POWDER.

Publications (1)

Publication Number Publication Date
GB1405564A true GB1405564A (en) 1975-09-10

Family

ID=4436314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5667073A Expired GB1405564A (en) 1972-12-28 1973-12-06 Magnetic brush for use in developing electrophotographic images

Country Status (14)

Country Link
US (1) US3890928A (en)
JP (1) JPS4998057A (en)
AU (1) AU474329B2 (en)
BE (1) BE809167A (en)
BR (1) BR7310171D0 (en)
CA (1) CA981012A (en)
CH (1) CH549234A (en)
DE (1) DE2364563A1 (en)
FR (1) FR2212570B1 (en)
GB (1) GB1405564A (en)
IT (1) IT1000470B (en)
NL (1) NL7317717A (en)
SE (1) SE389747B (en)
ZA (1) ZA739385B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS575630Y2 (en) * 1977-01-31 1982-02-02
US4614420A (en) * 1983-05-31 1986-09-30 Xerox Corporation Magnetically agitated development system
US4829338A (en) * 1988-01-29 1989-05-09 Xerox Corporation Electrophotographic device with improved bead pickoff arrangement
US5768667A (en) * 1996-09-04 1998-06-16 Rti International, Inc. Developer roll magnet for toner cartridge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1006078A (en) * 1960-09-26 1965-09-29 Rank Xerox Ltd Improved cascade development of electrostatic latent images
US3402698A (en) * 1966-06-06 1968-09-24 Konishiroku Photo Ind Magnet assembly for magnetic developing brush and developing apparatus for electrostatic process
US3654902A (en) * 1969-11-28 1972-04-11 Plastic Coating Corp Toner unit for photoelectrostatic reproduction

Also Published As

Publication number Publication date
AU474329B2 (en) 1975-06-12
ZA739385B (en) 1974-11-27
BE809167A (en) 1974-04-16
IT1000470B (en) 1976-03-30
FR2212570A1 (en) 1974-07-26
NL7317717A (en) 1974-07-02
FR2212570B1 (en) 1978-03-24
US3890928A (en) 1975-06-24
BR7310171D0 (en) 1974-08-15
JPS4998057A (en) 1974-09-17
CA981012A (en) 1976-01-06
CH549234A (en) 1974-05-15
DE2364563A1 (en) 1974-07-04
SE389747B (en) 1976-11-15
AU6330773A (en) 1975-06-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee