Suction apparatus for printing press

Details Suction apparatus for printing press Suction apparatus for printing press

1995-10-27

1996-11-19

Yan, Ren

Printing

Rolling contact machines

Rotary

271183, B41F 1324

Patent

active

055752071

ABSTRACT:
A suction apparatus for a printing press includes a plurality of suction ports and air shutter devices. The suction ports suck and hold an object used for a printing operation. The air shutter devices are provided to the suction ports on at least one end portion side not used for a suction operation of a small-size object. Each of the air shutter devices is constituted by a passage block having an air passage through which air for sucking an object passes, a magnetic member arranged around an air passage opening portion of the passage block, and a shutter member consisting of a magnetic material and movable between a closed position where the air passage opening portion of the passage block including the magnetic member is closed and an open position where the air passage is open, one of the magnetic member and the shutter member being magnetized. The shutter member moves to the closed position to close the air passage opening portion of the passage block by an air suction force and a magnetic attraction force between the shutter member and the magnetic member when the suction operation of the small-size object is performed.

REFERENCES:
patent: 4776577 (1988-10-01), Marschke et al.
patent: 4997178 (1991-03-01), Ogoda
patent: 5139253 (1992-08-01), Bohme et al.
patent: 5165679 (1992-11-01), Kinomoto
patent: 5417158 (1995-05-01), Parsio
patent: 5423255 (1995-06-01), Maass
patent: 5497987 (1996-03-01), Henn et al.

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