(19)
(11) EP 0 427 471 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
01.07.1992 Bulletin 1992/27

(43) Date of publication A2:
15.05.1991 Bulletin 1991/20

(21) Application number: 90312020.2

(22) Date of filing: 02.11.1990
(51) International Patent Classification (IPC)5: G06K 15/12, G03G 15/04, G03G 15/00
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 09.11.1989 JP 291663/89
06.12.1989 JP 316942/89

(71) Applicant: TOKYO ELECTRIC CO., LTD.
Meguro Tokyo (JP)

(72) Inventors:
  • Yamagchi, Yasuyoshi
    Tagata, Shizuoka (JP)
  • Asai, Yoshinori
    Tagata, Shizuoka (JP)

(74) Representative: Tribe, Thomas Geoffrey et al
F.J. Cleveland & Company 40-43 Chancery Lane
London WC2A 1JQ
London WC2A 1JQ (GB)


(56) References cited: : 
   
       


    (54) Electrophotographic copying machine


    (57) An electrophotographic copying machine which forms an electrostatic latent image on a photoconductive means by charging the image forming surface of the photoconductive means by a charger and scanning the charged image forming surface of the photoconductive means by an exposure unit, develops the electrostatic latent image by a developing unit, and transfers the developed image from the photoconductive means to a recording sheet by a transfer unit. The electrophotographic copying machine is provided with a holding means capable of holding an exposure unit of either of different systems. Thus, the electrophotographic copying machine can be constructed in a desired model by incorporating an exposure unit of a desired system without changing most of the component parts.







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