(19)
(11) EP 0 381 382 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.02.1991 Bulletin 1991/06

(43) Date of publication A2:
08.08.1990 Bulletin 1990/32

(21) Application number: 90300808.4

(22) Date of filing: 25.01.1990
(51) International Patent Classification (IPC)5: B65H 3/08
(84) Designated Contracting States:
DE FR GB

(30) Priority: 30.01.1989 JP 9802/89
28.04.1989 JP 50404/89
28.04.1989 JP 50403/89

(71) Applicant: BROTHER KOGYO KABUSHIKI KAISHA
Nagoya-shi, Aichi-ken (JP)

(72) Inventors:
  • Hatta, Naoyuki, c/o Brother Kogyo Kabushiki K.
    Nagoya-shi, Aichi-ken (JP)
  • Furukawa, Satoshi, c/o Brother Kogyo Kabushiki K.
    Nagoya-shi, Aichi-ken (JP)

(74) Representative: Senior, Alan Murray et al
J.A. KEMP & CO., 14 South Square, Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB)


(56) References cited: : 
   
       


    (54) Sheet feeding mechanism having dust preventing means and method for cleaning the sheet feeding mechanism


    (57) A sheet feeding mechanism having dust preventing means. The sheet feeding mechanism includes a suction cup (31) contactable with a sheet, evacuating means (55) for generating negative pressure within the suction cups and tube means (54) connected between the evacuating means and the suction cups. The dust preventing means includes a filter member (73) disposed within the tube means. The evacuating means includes a cylinder (56) and a piston (58). The cylinder extends in vertical direction or in horizontal direction. In the latter case, one side end of the cylinder is connected to the tube means and another side end is closed for preventing dusts from being entered thereinto, and the cylinder wall is formed with a small bore at lower portion thereof and adjacent the other side. For cleaning the sheet feeding mechanism, positive air stream is generated within the mechanism during idling state thereof.







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