Printing – Work supporting members – Grippers
Patent
1995-10-06
1997-03-11
Bennett, Christopher A.
Printing
Work supporting members
Grippers
1014151, 101410, 271204, B41F 2110
Patent
active
056091052
ABSTRACT:
A sheet-conveying drum for use between units in a printing machine is provided with a plurality of gripper bridges arranged substantially circumferentially symmetrically on the drum surface. The gripper bridges hold the paper to the drum and include gripper impact strips that are adjustable radially relative to the drum in order to accommodate printing materials of different thickness. Each gripper impact strip is adjusted by means of a positioning device that is arranged on the drum radially inward of the gripper impact strip and mounted so that it can move axially relative to the drum and cam the gripper impact strip radially. The axial movement of each positioning device is brought about by an actuating device which is preferably a pneumatic cylinder and is disposed on the body of the drum at the free end of each positioning device. An energy supply sequentially actuates each actuating device resulting in the piston of each cylinder either extending or retracting. The extension and retraction of the actuating device moves the positioning device in the axial direction between adjustable stops thereby camming the gripper impact strips into two separate operating positions.
REFERENCES:
patent: 4667952 (1987-05-01), Jeschke et al.
patent: 4735142 (1988-04-01), Haupenthal
patent: 5136946 (1992-08-01), Becker
patent: 5333547 (1994-08-01), Pristerer et al.
patent: 5390601 (1995-02-01), Fricke et al.
patent: 5465663 (1995-11-01), Bayer et al.
Dettinger Dietrich
Holl Roland
Bennett Christopher A.
MAN Roland Druckmaschinen AG
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