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EP0385674A3 - Toner image transferring device used in electrophotographic field - Google Patents

Toner image transferring device used in electrophotographic field Download PDF

Info

Publication number
EP0385674A3
EP0385674A3 EP19900301970 EP90301970A EP0385674A3 EP 0385674 A3 EP0385674 A3 EP 0385674A3 EP 19900301970 EP19900301970 EP 19900301970 EP 90301970 A EP90301970 A EP 90301970A EP 0385674 A3 EP0385674 A3 EP 0385674A3
Authority
EP
European Patent Office
Prior art keywords
toner image
paper
sheet
transferring device
transfer charger
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
EP19900301970
Other languages
German (de)
French (fr)
Other versions
EP0385674A2 (en
EP0385674B1 (en
Inventor
Masatoshi Kimura
Hideaki Iwasaki
Sachio Sasaki
Kunihiko Sato
Masao Konishi
Akiyoshi Iwamasa
Toshio Tooda
Hiroshi Nou
Shigenobu Utaka
Ryo Kitao
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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
Priority claimed from JP1044368A external-priority patent/JPH02223980A/en
Priority claimed from JP1044367A external-priority patent/JPH0820815B2/en
Priority claimed from JP1044369A external-priority patent/JPH02223978A/en
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0385674A2 publication Critical patent/EP0385674A2/en
Publication of EP0385674A3 publication Critical patent/EP0385674A3/en
Application granted granted Critical
Publication of EP0385674B1 publication Critical patent/EP0385674B1/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
    • 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
    • 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
    • G03G15/163—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 using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
    • G03G15/1635—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 using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
    • G03G15/1645—Arrangements for controlling the amount of charge

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

A toner image transferring device is applied to, for example, an electrophotographic printer for electrostatically transferring a charged toner image from a photosensitive drum (10) to a sheet or paper (P), and comprises a transfer charger (16) disposed near the drum (10) to form a clearance therebetween for feeding an electric charge to the sheet or paper through which the sheet or paper is passed, an electric source (38) for supplying an electric energy to the transfer charger to give the sheet or paper an electric charge having a polarity opposite to that of the toner image, and a controller (40) for controlling the electric energy output from the electric source (38) to the transfer charger (11) so that a leading edge of the sheet or paper can be prevented from being excessively charged.
EP90301970A 1989-02-25 1990-02-23 Toner image transferring device used in electrophotographic field Expired - Lifetime EP0385674B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP44367/89 1989-02-25
JP1044368A JPH02223980A (en) 1989-02-25 1989-02-25 toner image transfer device
JP1044367A JPH0820815B2 (en) 1989-02-25 1989-02-25 Toner image transfer device
JP44369/89 1989-02-25
JP1044369A JPH02223978A (en) 1989-02-25 1989-02-25 toner image transfer device
JP44368/89 1989-02-25

Publications (3)

Publication Number Publication Date
EP0385674A2 EP0385674A2 (en) 1990-09-05
EP0385674A3 true EP0385674A3 (en) 1991-09-04
EP0385674B1 EP0385674B1 (en) 1995-08-09

Family

ID=27291867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90301970A Expired - Lifetime EP0385674B1 (en) 1989-02-25 1990-02-23 Toner image transferring device used in electrophotographic field

Country Status (4)

Country Link
EP (1) EP0385674B1 (en)
KR (1) KR930010872B1 (en)
CA (1) CA2010623C (en)
DE (1) DE69021411T2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436306A3 (en) * 1989-12-06 1992-03-18 Konica Corporation Image forming apparatus
US5276491A (en) * 1989-12-06 1994-01-04 Konica Corporation Image forming apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4183653A (en) * 1977-07-21 1980-01-15 Ricoh Company, Ltd. Sheet stripper for an electrostatographic apparatus
US4728991A (en) * 1984-09-19 1988-03-01 Canon Kabushiki Kaisha Image forming apparatus
US4772918A (en) * 1984-06-30 1988-09-20 Ricoh Company, Ltd. Current-controlled image transfer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61188570A (en) * 1985-02-16 1986-08-22 Canon Inc Transferring and separating device
JPH01201686A (en) * 1988-02-08 1989-08-14 Ricoh Co Ltd Image forming device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4183653A (en) * 1977-07-21 1980-01-15 Ricoh Company, Ltd. Sheet stripper for an electrostatographic apparatus
US4772918A (en) * 1984-06-30 1988-09-20 Ricoh Company, Ltd. Current-controlled image transfer
US4728991A (en) * 1984-09-19 1988-03-01 Canon Kabushiki Kaisha Image forming apparatus

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 12 (P-535)(2459), 13 January 1987; & JP - A - 61188570 (CANON) 22.08.1986 *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 502 (P-958)(3850), 13 November 1989; & JP - A - 1201686 (RICOH) 14.08.1989 *
PATENT ABSTRACTS OF JAPAN vol. 7, no. 180 (P-215)(1325), 9 August 1983; & JP - A - 5882282 (CANON) 17.05.1983 *

Also Published As

Publication number Publication date
CA2010623C (en) 1995-01-24
DE69021411D1 (en) 1995-09-14
CA2010623A1 (en) 1990-08-25
EP0385674A2 (en) 1990-09-05
KR910015895A (en) 1991-09-30
EP0385674B1 (en) 1995-08-09
DE69021411T2 (en) 1996-02-15
KR930010872B1 (en) 1993-11-15

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