EP0368617A3 - Image forming apparatus having electrostatic attraction control means for transfer material - Google Patents

Image forming apparatus having electrostatic attraction control means for transfer material Download PDF

Info

Publication number
EP0368617A3
EP0368617A3 EP19890311512 EP89311512A EP0368617A3 EP 0368617 A3 EP0368617 A3 EP 0368617A3 EP 19890311512 EP19890311512 EP 19890311512 EP 89311512 A EP89311512 A EP 89311512A EP 0368617 A3 EP0368617 A3 EP 0368617A3
Authority
EP
European Patent Office
Prior art keywords
image forming
control means
forming apparatus
transfer material
electrostatic attraction
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
EP19890311512
Other versions
EP0368617B1 (en
EP0368617A2 (en
Inventor
Takashi Hasegawa
Atsushi Takeda
Kenichi Matsumoto
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.)
Canon Inc
Original Assignee
Canon Inc
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 JP63281596A external-priority patent/JP2701154B2/en
Priority claimed from JP32203688A external-priority patent/JPH02168287A/en
Application filed by Canon Inc filed Critical Canon Inc
Publication of EP0368617A2 publication Critical patent/EP0368617A2/en
Publication of EP0368617A3 publication Critical patent/EP0368617A3/en
Application granted granted Critical
Publication of EP0368617B1 publication Critical patent/EP0368617B1/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
    • 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
    • G03G15/165—Arrangements for supporting or transporting the second base in the transfer area, e.g. guides
    • G03G15/1655—Arrangements for supporting or transporting the second base in the transfer area, e.g. guides comprising a rotatable holding member to which the second base is attached or attracted, e.g. screen transfer holding drum
    • 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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
    • G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
    • G03G15/6561—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration
    • 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
    • G03G15/1665—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 by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00409—Transfer device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00413—Fixing device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00611—Detector details, e.g. optical detector
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00649—Electrodes close to the copy feeding path
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00654—Charging device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00772—Detection of physical properties of temperature influencing copy sheet handling
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00776—Detection of physical properties of humidity or moisture influencing copy sheet handling
EP19890311512 1988-11-08 1989-11-07 Image forming apparatus having electrostatic attraction control means for transfer material Expired - Lifetime EP0368617B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP63281596A JP2701154B2 (en) 1988-11-08 1988-11-08 Image forming device
JP281596/88 1988-11-08
JP32203688A JPH02168287A (en) 1988-12-22 1988-12-22 Picture forming device
JP322036/88 1988-12-22

Publications (3)

Publication Number Publication Date
EP0368617A2 EP0368617A2 (en) 1990-05-16
EP0368617A3 true EP0368617A3 (en) 1990-11-28
EP0368617B1 EP0368617B1 (en) 1994-02-02

Family

ID=26554246

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890311512 Expired - Lifetime EP0368617B1 (en) 1988-11-08 1989-11-07 Image forming apparatus having electrostatic attraction control means for transfer material

Country Status (2)

Country Link
EP (1) EP0368617B1 (en)
DE (1) DE68912889T2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69226682T2 (en) * 1991-06-28 1999-02-04 Canon Kk Imaging device with charging element
US5461461A (en) * 1992-01-22 1995-10-24 Ricoh Company, Ltd. Image transferring device and medium separating device for an image forming apparatus
JP3271811B2 (en) * 1992-04-09 2002-04-08 株式会社リコー Image forming device
JP3256010B2 (en) * 1992-12-22 2002-02-12 キヤノン株式会社 Image forming device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2027008A1 (en) * 1969-06-02 1970-12-17 Xerox Corp., Rochester, N.Y. (V.St.A.) Sheet transport device
US4676627A (en) * 1982-12-09 1987-06-30 Canon Kabushiki Kaisha Image forming apparatus
EP0276112A1 (en) * 1987-01-19 1988-07-27 Canon Kabushiki Kaisha An image forming apparatus
EP0276107A2 (en) * 1987-01-19 1988-07-27 Canon Kabushiki Kaisha Image forming apparatus
EP0298506A2 (en) * 1987-07-09 1989-01-11 Canon Kabushiki Kaisha An image forming apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2027008A1 (en) * 1969-06-02 1970-12-17 Xerox Corp., Rochester, N.Y. (V.St.A.) Sheet transport device
US4676627A (en) * 1982-12-09 1987-06-30 Canon Kabushiki Kaisha Image forming apparatus
EP0276112A1 (en) * 1987-01-19 1988-07-27 Canon Kabushiki Kaisha An image forming apparatus
EP0276107A2 (en) * 1987-01-19 1988-07-27 Canon Kabushiki Kaisha Image forming apparatus
EP0298506A2 (en) * 1987-07-09 1989-01-11 Canon Kabushiki Kaisha An image forming apparatus

Also Published As

Publication number Publication date
EP0368617B1 (en) 1994-02-02
EP0368617A2 (en) 1990-05-16
DE68912889D1 (en) 1994-03-17
DE68912889T2 (en) 1994-08-25

Similar Documents

Publication Publication Date Title
EP0376669A3 (en) Electrostatic printing apparatus
GB2270037B (en) Image transferring device for an image forming apparatus
EP0535655A3 (en) Electrophotographic apparatus having image control means
EP0333106A3 (en) Image forming apparatus
GB2242542B (en) Toner supply device for an image forming apparatus
EP0520819A3 (en) Image forming apparatus having charging member
EP0417801A3 (en) Image forming apparatus having charging means
EP0511461A3 (en) Control apparatus for mechanical devices
GB2230764B (en) Finisher for an image forming apparatus
EP0520144A3 (en) Electrophotographic image forming apparatus
EP0372813A3 (en) Image forming apparatus
EP0590584A3 (en) Image forming apparatus having recording material carrying member
EP0341894A3 (en) Image forming apparatus
EP0357086A3 (en) Image forming apparatus
EP0342704A3 (en) Image forming apparatus
EP0426445A3 (en) Photosensitive material for electrophotography
EP0431559A3 (en) Image forming apparatus having charging means
EP0604974A3 (en) Image forming apparatus having transfer material bearing member.
HK1014058A1 (en) Image forming apparatus with transfer material separating means
GB9107955D0 (en) Electrophotographic image forming apparatus
EP0629915A3 (en) Apparatus for arraying sheets of photosensitive material.
GB8825188D0 (en) Control device for copier
GB2211788B (en) Control system for an image forming apparatus
EP0368617A3 (en) Image forming apparatus having electrostatic attraction control means for transfer material
GB8915971D0 (en) Image forming apparatus

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19901231

17Q First examination report despatched

Effective date: 19920805

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 68912889

Country of ref document: DE

Date of ref document: 19940317

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20071120

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20071112

Year of fee payment: 19

Ref country code: FR

Payment date: 20071122

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081130

Year of fee payment: 20

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20081107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081107

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081130