Printing – Work supporting members – Grippers
Patent
1981-04-17
1982-12-07
Fisher, J. Reed
Printing
Work supporting members
Grippers
101411, 101230, B41F 2104, B65H 512, B65H 2906
Patent
active
043621058
ABSTRACT:
A sheet drawing device for a sheet-fed rotary press comprises a pair of adjusting gears adjustably mounted on a main shaft, a plurality of segment arms rotatably mounted on the main shaft, a bearing block adjustably mounted on each of the segment arms, which is pivotably mounted for adjustment about an axis perpendicular to the bearing axis of the bearing block, a sheet-drawing roll journaled in each bearing block, a plurality of fixtures secured to a gripper shaft which is pivotably mounted in the adjusting gears, each fixture being resiliently connected to a guide which is rotatably mounted on the gripper shaft and which carries a freely rotatable trailing-end gripping roller that is engageable with one of the sheet-drawing rolls, means for controlling pivoting of the gripper shaft to bring the trailing-end gripping rollers into and out of sheet gripping engagement with the sheet-drawing rolls, a second gripper shaft pivotably mounted in the adjusting gears, on which are secured a plurality of driving arms each of which carries a driving roller engaged in a recess in one of the sheet-drawing rolls, and means for controlling pivoting of the second gripper shaft, said means acting to take up slack in a sheet which is being gripped by the trailing-end gripping rollers, by driving the sheet-drawing rolls in the sheet-drawing direction.
REFERENCES:
patent: 3865362 (1975-02-01), Luffy et al.
patent: 4024814 (1977-05-01), Becker
patent: 4120492 (1978-10-01), Cerny
Fisher J. Reed
Kabushiki Kaisha Shinoharatekkosho
Marshall, Jr. C. O.
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