(19)
(11) EP 0 709 747 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.04.1998 Bulletin 1998/18

(43) Date of publication A2:
01.05.1996 Bulletin 1996/18

(21) Application number: 95307715.3

(22) Date of filing: 30.10.1995
(51) International Patent Classification (IPC)6: G03G 15/06, G03G 13/08
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 31.10.1994 JP 267792/94

(71) Applicant: MITA INDUSTRIAL CO. LTD.
Osaka-shi Osaka 540 (JP)

(72) Inventors:
  • Tsujita, Mitsuji, c/o Mita Industrial Co., Ltd.
    Osaka 540 (JP)
  • Tanaka, Nariaki, c/o Mita Industrial Co., Ltd.
    Osaka 540 (JP)
  • Terada, Takashi, c/o Mita Industrial Co., Ltd.
    Osaka 540 (JP)
  • Terada, Takuji, c/o Mita Industrial Co., Ltd.
    Osaka 540 (JP)
  • Yamazato, Ichiro, c/o Mita Industrial Co., Ltd.
    Osaka 540 (JP)
  • Miyamoto, Eiichi, c/o Mita Industrial Co., Ltd.
    Osaka 540 (JP)

(74) Representative: Cresswell, Thomas Anthony 
J.A. KEMP & CO. 14 South Square Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)

   


(54) Electrophotographic method using photosensitive material


(57) An electrophotographic method in which an electrostatic latent image on a photosensitive material is developed while applying a developing bias voltage of the same polarity as the polarity of the charge of the photosensitive material. The developing bias voltage is higher than a potential that corresponds to a point of intersection (H) between light attenuation characteristics curves (F,G) approximating (a) the zone of large amount of exposure to light and (b) the zone of small amount of exposure to light.






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