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

(19)

(11)

EP 0 515 164 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	03.11.1993 Bulletin 1993/44

(43)	Date of publication A2:
	25.11.1992 Bulletin 1992/48

(21)	Application number: 92304561.1

(22)	Date of filing: 20.05.1992

(51)	International Patent Classification (IPC)⁵: G03G 15/02

(84)	Designated Contracting States:
	DE FR GB IT

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Priority:

20.05.1991 JP 145323/91
22.07.1991 JP 205474/91

(71)	Applicant: CANON KABUSHIKI KAISHA
	Tokyo (JP)

(72)	Inventors:
	Hoshika, Norihisa, c/o Canon Kabushiki Kaisha Ohta-ku, Tokyo (JP) Shoji, Takeo, c/o Canon Kabushiki Kaisha Ohta-ku, Tokyo (JP) Shimizu, Yasushi, c/o Canon Kabushiki Kaisha Ohta-ku, Tokyo (JP)

(74)	Representative: Beresford, Keith Denis Lewis et al
	BERESFORD & Co. 2-5 Warwick Court High Holborn London WC1R 5DJ London WC1R 5DJ (GB)

(56)

References cited: :

(54)	Charger having charging blade, image forming apparatus having same and process cartridge having same

(57) A charging device includes a charging blade (10) contactable to a member (1) to be charged; a voltage applying device (E) for applying an oscillating voltage between the charging blade (10) and the member (1) to be charged; and an urging spring (24) for urging the charging blade (10) and the member (1) to be charged toward and away from each other.

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