EP0515164A3 - Charger having charging blade, image forming apparatus having same and process cartridge having same - Google Patents

Charger having charging blade, image forming apparatus having same and process cartridge having same Download PDF

Info

Publication number: EP0515164A3
Authority: EP; European Patent Office
Prior art keywords: same; charger; image forming; forming apparatus; process cartridge
Prior art date: 1991-05-20
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

EP19920304561

Other versions

EP0515164A2 (en

Inventor

Norihisa Hoshika

Takeo Shoji

Yasushi Shimizu

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.)

1991-05-20

Filing date

1992-05-20

Publication date

1993-11-03

1991-05-20 Priority claimed from JP14532391A external-priority patent/JPH04343373A/en

1991-07-22 Priority claimed from JP20547491A external-priority patent/JPH0527551A/en

1992-05-20 Application filed by Canon Inc filed Critical Canon Inc

1992-11-25 Publication of EP0515164A2 publication Critical patent/EP0515164A2/en

1993-11-03 Publication of EP0515164A3 publication Critical patent/EP0515164A3/en

Status Withdrawn legal-status Critical Current

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
- G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
- G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
- G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers

Landscapes

Physics & Mathematics (AREA)
Engineering & Computer Science (AREA)
Plasma & Fusion (AREA)
General Physics & Mathematics (AREA)
Electrostatic Charge, Transfer And Separation In Electrography (AREA)

EP19920304561 1991-05-20 1992-05-20 Charger having charging blade, image forming apparatus having same and process cartridge having same Withdrawn EP0515164A3 (en)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
JP14532391A JPH04343373A (en)	1991-05-20	1991-05-20	Contact type electrostatic charger
JP145323/91		1991-05-20
JP205474/91		1991-07-22
JP20547491A JPH0527551A (en)	1991-07-22	1991-07-22	Contact electrifying blade

Publications (2)

Publication Number	Publication Date
EP0515164A2 EP0515164A2 (en)	1992-11-25
EP0515164A3 true EP0515164A3 (en)	1993-11-03

Family

ID=26476474

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19920304561 Withdrawn EP0515164A3 (en)	1991-05-20	1992-05-20	Charger having charging blade, image forming apparatus having same and process cartridge having same

Country Status (1)

Country	Link
EP (1)	EP0515164A3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN1049745C (en) *	1993-05-31	2000-02-23	株式会社理光	Roller charging apparatus and image forming apparatus using the same
US5860046A (en) *	1996-07-09	1999-01-12	Minolta Co., Ltd.	Charging method and charging device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2892973A (en) *	1955-01-26	1959-06-30	Gen Dynamics Corp	Apparatus for imparting electrostatic charges in electrophotography
EP0312230A2 (en) *	1987-10-05	1989-04-19	Canon Kabushiki Kaisha	An image forming apparatus
US5095335A (en) *	1989-09-19	1992-03-10	Canon Kabushiki Kaisha	Copier with retractable charging unit to prevent damage to drum when removing process cartridge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS60147756A (en) *	1984-01-13	1985-08-03	Toshiba Corp	Charging device
JPH0313973A (en) *	1989-06-13	1991-01-22	Nec Corp	Electrophotographic printing device
JPH03100675A (en) *	1989-09-14	1991-04-25	Canon Inc	Contact electrifier

1992
- 1992-05-20 EP EP19920304561 patent/EP0515164A3/en not_active Withdrawn

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2892973A (en) *	1955-01-26	1959-06-30	Gen Dynamics Corp	Apparatus for imparting electrostatic charges in electrophotography
EP0312230A2 (en) *	1987-10-05	1989-04-19	Canon Kabushiki Kaisha	An image forming apparatus
US5095335A (en) *	1989-09-19	1992-03-10	Canon Kabushiki Kaisha	Copier with retractable charging unit to prevent damage to drum when removing process cartridge

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 15, no. 131 (P-1186)29 March 1991 & JP-A-03 013 973 ( NEC CORP ) 22 January 1991 *
PATENT ABSTRACTS OF JAPAN vol. 15, no. 292 (P-1230)24 July 1991 & JP-A-03 100 675 ( CANON INC ) 25 April 1991 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 320 (P-413)(2043) 14 December 1985 & JP-A-60 147 756 ( TOSHIBA K.K. ) 3 August 1985 *

Also Published As

Publication number	Publication date
EP0515164A2 (en)	1992-11-25

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Legal Events

Date	Code	Title	Description
1992-10-09	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
1992-11-25	AK	Designated contracting states	Kind code of ref document: A2 Designated state(s): DE FR GB IT
1993-09-10	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1993-11-03	AK	Designated contracting states	Kind code of ref document: A3 Designated state(s): DE FR GB IT
1994-05-18	17P	Request for examination filed	Effective date: 19940321
1995-06-07	17Q	First examination report despatched	Effective date: 19950420
1996-12-06	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN
1997-01-22	18D	Application deemed to be withdrawn	Effective date: 19960730