(19)
(11) EP 0 415 773 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
13.11.1991 Bulletin 1991/46

(43) Date of publication A2:
06.03.1991 Bulletin 1991/10

(21) Application number: 90309517.2

(22) Date of filing: 30.08.1990
(51) International Patent Classification (IPC)5: G03G 15/01, G03G 15/09
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 30.08.1989 JP 223694/89

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

(72) Inventors:
  • Hatakeyama, Takuya, c/o Canon Kabushiki Kaisha
    Ohta-ku, Tokyo (JP)
  • Koike, Michiro, 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) An image forming apparatus


    (57) An image forming apparatus includes image bearing member; a device for forming an electrostatic latent image on the image bearing member; a developing device for developing a latent image formed on the image bearing member, the device including a developing unit having a developer carrying member for carrying thereon and supplying a developer to the image bearing member; a moving device for moving the developing unit between an operative position and a non-operative position away therefrom; a supporting member for supporting the developing unit for rotation about an axis, the supporting member rotatably supporting the developing unit at one side and supporting the developing unit at the other side for rotation and movement in a predetermined direction; an urging device for urging the developing unit toward the image bearing member adjacent the other side; a driver for applying driving force to the developer carrying member of the developing unit; wherein when the developing unit rotates to be set to the operating position, and the driver is operated, the developing unit is urged toward the image bearing member about the axis.







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