(19)
(11) EP 0 445 718 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.05.1992 Bulletin 1992/19

(43) Date of publication A2:
11.09.1991 Bulletin 1991/37

(21) Application number: 91103290.2

(22) Date of filing: 05.03.1991
(51) International Patent Classification (IPC)5: G03G 21/00, G03G 15/08
(84) Designated Contracting States:
DE FR GB

(30) Priority: 06.03.1990 JP 52698/90

(71) Applicant: Oki Electric Industry Co., Ltd.
Tokyo (JP)

(72) Inventors:
  • Kikuchi, Hiroshi, c/o Oki Electric Ind. Co. Ltd.
    Minato-ku, Tokyo (JP)
  • Momiyama, Yoshiharu, c/o Oki Electric Ind. Co. Ltd
    Minato-ku, Tokyo (JP)
  • Koga, Yoshitomo, c/o Oki Electric Ind. Co. Ltd
    Minato-ku, Tokyo (JP)
  • Sakai, Masato, c/o Oki Electric Ind. Co. Ltd
    Minato-ku, Tokyo (JP)
  • Ito, Katsuyuki, c/o Oki Electric Ind. Co. Ltd
    Minato-ku, Tokyo (JP)
  • Katakura, Shinichi, c/o Oki Electric Ind. Co. Ltd.
    Minato-ku, Tokyo (JP)

(74) Representative: Betten & Resch 
Reichenbachstrasse 19
80469 München
80469 München (DE)


(56) References cited: : 
   
       


    (54) Image forming apparatus having function of dust removal


    (57) In a graphic type non-impact printer or the like
       a control means reverses the rotation of a developing roller (7) so as to remove dust or the like caught between the developing roller and a developing blade (8); or the dust or the like is released from its press-held condition between the developing roller (7) and the developing blade (8) even though it cannot be completely removed, thereby it is possible to remove the dust later.






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