(19)
(11) EP 0 361 509 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.12.1990 Bulletin 1990/51

(43) Date of publication A2:
04.04.1990 Bulletin 1990/14

(21) Application number: 89118059.8

(22) Date of filing: 29.09.1989
(51) International Patent Classification (IPC)5: G03G 21/00
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 29.09.1988 JP 242343/88
29.09.1988 JP 242345/88

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

(72) Inventors:
  • Nakazawa, Nobuo
    Kawasaki-shi Kanagawa-ken (JP)
  • Hoshi, Akimitsu
    Kawasaki-shi Kanagawa-ken (JP)
  • Kume, Nobuyuki
    Yokohama-shi Kanagawa-ken (JP)

(74) Representative: Tiedtke, Harro, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4
80336 München
80336 München (DE)


(56) References cited: : 
   
       


    (54) Image forming apparatus having cleaning means


    (57) The present invention relates to an image forming apparatus having cleaning means (2) which frictionally contacts magnetic particles on a magnet roller (4) with an image bearing member in order to remove foreign matters adhered to the image bearing member, thereby preventing the deterioration of the image quality. According to the present invention, by slowly rotating the magnet roller (4) so that a portion thereof opposed to the image bearing member is moved in the same direction as a moving direction of the image bearing member, thus preventing the toner from overflowing and scattering out of the cleaning means (2). Further, when the non-magnetic toner is used, by providing a toner cavity on the magnet roller (4), the scattering of the non-magnetic toner can be prevented, whereby the parts in the apparatus is prevented from being contaminated by the toner.







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