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GB976998A - Developing apparatus for electrostatic images - Google Patents

Developing apparatus for electrostatic images

Info

Publication number
GB976998A
GB976998A GB47823/62A GB4782362A GB976998A GB 976998 A GB976998 A GB 976998A GB 47823/62 A GB47823/62 A GB 47823/62A GB 4782362 A GB4782362 A GB 4782362A GB 976998 A GB976998 A GB 976998A
Authority
GB
United Kingdom
Prior art keywords
trough
roller
magnetizing current
electrostatic images
developer
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
GB47823/62A
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.)
Kalle GmbH and Co KG
Original Assignee
Kalle GmbH and Co KG
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 Kalle GmbH and Co KG filed Critical Kalle GmbH and Co KG
Publication of GB976998A publication Critical patent/GB976998A/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

976, 998. Developing electrostatic images. KALLE A. G. Dec. 18, 1962 [Dec. 27, 1961], No. 47823/62. Heading G2H. Apparatus for developing electrostatic images comprises a trough containing a developer mixture of iron filings and toner powder, an agitator 15 in the trough, an iron roller 1 formed by a number of rotor plates supporting windings to which current is supplied to magnetize the roller and having a covering 11 of synthetic plastic material, means for interrupting the magnetizing current once in every revolution of the roller, and a deflector plate 14 coacting with the roller as it moves away from electrostatic image-bearing member so that when the magnetizing current is interrupted the spent developer material is deflected towards the wall of the trough. The covering 11 may be a polyolefine, a vinyl polymer, a polyamide, a polyester, a phenol-formaldehyde resin or other plastics used as transformer insulators and may have an electrically conductive surface as of silver by means of which it may be earthed or have a bias voltage applied so as to act as a development control electrode. The toner component of the developer in the trough may be replenished from a reservoir 17 containing an agitator 25 by metered additions controlled by plungers 18 operated from a motordriven eccentric 23. The magnetizing current for each winding 9 which occupies a pair of diametrically opposite recesses 8 may be applied by a brush engaging a slip ring mounted on the drum shaft which is non-conducting over the sector between the points 12 and 13.
GB47823/62A 1961-12-27 1962-12-18 Developing apparatus for electrostatic images Expired GB976998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK0045522 1961-12-27

Publications (1)

Publication Number Publication Date
GB976998A true GB976998A (en) 1964-12-02

Family

ID=7223876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47823/62A Expired GB976998A (en) 1961-12-27 1962-12-18 Developing apparatus for electrostatic images

Country Status (4)

Country Link
US (1) US3257224A (en)
BE (1) BE626526A (en)
GB (1) GB976998A (en)
NL (1) NL286833A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687106A (en) * 1969-07-11 1972-08-29 Xerox Corp Donor apparatus and method

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3318284A (en) * 1964-01-30 1967-05-09 Hitachi Ltd Apparatus for developing electrostatic images of records
US3574301A (en) * 1969-04-02 1971-04-13 Xerox Corp Developing apparatus
US4086873A (en) * 1974-07-09 1978-05-02 Konishiroku Photo Industry Co., Ltd. Electrophotographic developing device incorporating a developing electrode having an insulation layer on its surface
US4017648A (en) * 1975-02-03 1977-04-12 Xerox Corporation Toner agitation through microfield donor
US3998185A (en) * 1975-02-03 1976-12-21 Xerox Corporation Microfield donors with toner agitation and the methods for their manufacture
US3996892A (en) * 1975-02-24 1976-12-14 Xerox Corporation Spatially programmable electrode-type roll for electrostatographic processors and the like
US5063412A (en) * 1990-09-26 1991-11-05 Xerox Corporation Development apparatus using an electromagnet to prevent development in the non-operative mode
US5289240A (en) * 1993-05-20 1994-02-22 Xerox Corporation Scavengeless developer unit with electroded donor roll
US5360940A (en) * 1993-07-14 1994-11-01 Xerox Corporation Scavengeless two component development with an electroded development roll
US5491538A (en) 1994-07-05 1996-02-13 Xerox Corporation Development apparatus having an adjustable width development nip
US5500969A (en) 1994-10-24 1996-03-26 Xerox Corporation Dual polarity commutated roll elctrostatic cleaner with acoustic transfer assist
US5614995A (en) * 1995-09-05 1997-03-25 Xerox Corporation Electroded donor roll having robust commutator contacts
US5589917A (en) * 1995-09-25 1996-12-31 Xerox Corporation Donor rolls with magnetically coupled (Transformer) commutation
US5600418A (en) * 1995-09-25 1997-02-04 Xerox Corporation Donor rolls with exterior commutation
US5570169A (en) * 1995-09-25 1996-10-29 Xerox Corporation Donor rolls with modular commutation
US5592271A (en) * 1996-01-11 1997-01-07 Xerox Corporation Donor rolls with capacitively cushioned commutation
US5594534A (en) 1996-01-11 1997-01-14 Xerox Corporation Electroded doner roll structure incorporating resistive network
US5745827A (en) * 1997-03-31 1998-04-28 Xerox Corporation Bundled steel wire SED communicator secondary cores

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US500400A (en) * 1893-06-27 Philip lange
US404465A (en) * 1889-06-04 Electric motor
US673980A (en) * 1900-06-22 1901-05-14 Harry M Mcnelly Electromagnet-motor.
US1048223A (en) * 1908-11-28 1912-12-24 Heinrich Stein Electromagnetic separator.
US1177981A (en) * 1914-05-14 1916-04-04 Parvin Wright Magnetic separator.
US1362072A (en) * 1917-11-17 1920-12-14 Arnold Horace Wade Magnetic ore-separator
US1449371A (en) * 1919-09-15 1923-03-27 Vincent G Apple Method of constructing armatures for dynamo-electric machines
US1371301A (en) * 1920-08-21 1921-03-15 Converse Henry Combined feeder and magnetic separator
US2449021A (en) * 1942-06-08 1948-09-07 Hoover Co Dynamoelectric machine
US2711249A (en) * 1954-05-20 1955-06-21 Fur Unternehmungen Der Eisen U Drum magnet separator
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
US2779306A (en) * 1955-03-25 1957-01-29 Ibm Electroscopic toner metering device
US2832311A (en) * 1956-01-10 1958-04-29 Haloid Co Apparatus for development of electrostatic images
DE1067305B (en) * 1957-01-18 1959-10-15
US3040704A (en) * 1957-04-16 1962-06-26 Rca Corp Apparatus for developing electrostatic printing
US2896101A (en) * 1957-05-03 1959-07-21 United Aircraft Corp Differential tachometer
US2904000A (en) * 1957-05-15 1959-09-15 Century Geophysical Corp Magnetic-brush developer
US2992733A (en) * 1957-10-09 1961-07-18 Indiana General Corp Magnetic pulley and permanent magnet therefor
US3028266A (en) * 1957-11-04 1962-04-03 Everett P Larsh Method and apparatus for impregnating motor windings and motor stator
US2844489A (en) * 1957-12-20 1958-07-22 Knapsack Ag Fluidized bed coating process
US2975758A (en) * 1958-03-13 1961-03-21 Haloid Xerox Inc Apparatus for developing electrostatic images
US3098765A (en) * 1959-03-16 1963-07-23 Robertson Photo Mechanix Inc Xerographic brush
US3088386A (en) * 1959-11-16 1963-05-07 American Photocopy Equip Co Electrophotographic photocopy machine
US3028708A (en) * 1960-01-08 1962-04-10 Columbus M Vaughan Blast cleaning machines
US3081737A (en) * 1961-03-01 1963-03-19 Gen Aniline & Film Corp Xerographic apparatus for applying ferromagnetic powder
US3152924A (en) * 1961-05-24 1964-10-13 Robertson Photo Mechanix Inc Xerographic brush

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687106A (en) * 1969-07-11 1972-08-29 Xerox Corp Donor apparatus and method

Also Published As

Publication number Publication date
NL286833A (en)
US3257224A (en) 1966-06-21
BE626526A (en)

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