(19)
(11) EP 0 368 617 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.11.1990 Bulletin 1990/48

(43) Date of publication A2:
16.05.1990 Bulletin 1990/20

(21) Application number: 89311512.1

(22) Date of filing: 07.11.1989
(51) International Patent Classification (IPC)5: G03G 15/00, G03G 15/16
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 08.11.1988 JP 281596/88
22.12.1988 JP 322036/88

(71) Applicant: CANON KABUSHIKI KAISHA
Tokyo 146 (JP)

(72) Inventors:
  • Hasegawa, Takashi
    Matsudo-shi Chiba-ken (JP)
  • Takeda, Atsushi
    Kawasaki-shi Kanagawa-ken (JP)
  • Matsumoto, Kenichi
    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) Image forming apparatus having electrostatic attraction control means for transfer material


    (57) An apparatus for conveying a transfer material (P) to a position where an image is transferred from an image bearing member (1) such an electrophotographic photosensitive member to it. A humidity detecting device (16) is provided in the image forming apparatus. An attracting device (6, 7) for electrostatically attracting the transfer material (P) on the transfer material conveying device (5). The attracting device is controlled in accordance with an output of the humidity detecting device. By this, the transfer material can be stably attracted on the carrying device irrespective of the humidity change in the apparatus. When the temperature is taken into account in addition to the humidity, a further preferable attraction control is possible.







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