(19)
(11) EP 0 481 852 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
10.03.1993 Bulletin 1993/10

(43) Date of publication A2:
22.04.1992 Bulletin 1992/17

(21) Application number: 91402706.5

(22) Date of filing: 10.10.1991
(51) International Patent Classification (IPC)5: G03G 15/00
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 19.10.1990 JP 282742/90

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

(72) Inventors:
  • Takada, Akihiro
    Osakasayama-shi, Osaka (JP)
  • Kondo, Akihiro
    Izumi-shi, Osaka (JP)

(74) Representative: Orès, Bernard et al
Cabinet ORES 6, Avenue de Messine
75008 Paris
75008 Paris (FR)


(56) References cited: : 
   
       


    (54) Electrophotographic copying machine and method for detecting density of original image thereof


    (57) An electrophotographic copying machine includes a detecting device (12) for detecting an original image density by scanning an original before a copy is taken, an inputting device (6,7) for specifying a desired region where the original image density is detected by the detecting device, an exposing device (9) for exposing the original with an amount of light corresponding to the detected original image density at the time of copying, a converting device (10) for converting light from the exposed original to image light, a photoconductor (13) receiving the image light and forming an electrostatic latent image, a developer (15) for developing the electrostatic latent image of the photoconductor using toner, and a transcriber (14) for transferring the developed image to paper.






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