Printing – Rolling contact machines – Rotary
Patent
1993-02-24
1994-02-08
Eickholt, Eugene H.
Printing
Rolling contact machines
Rotary
101240, 271213, 4147881, B41F 1324
Patent
active
052840891
ABSTRACT:
Protective system of a pile lifting device for sheet piles in a sheet-fed printing machine, wherein a pile support board is liftable and lowerable in guides of a frame by a motorized drive of a lifting unit having a fast-speed and a slower speed operating condition for both the lifting and lowering, the pile support board and a sheet pile supported thereby, respectively, being drivable by the motorized drive to a position switch and into a collision region wherein it can collide with another machine part, including a control member operative between the pile support board or the sheet pile supported thereby, on one hand, and a machine part present in the collision region, on the other hand, the control member being articulatingly fastened in vicinity of the position switch or to the machine part in the collision region, and having switch elements arranged in at least two switching stages for controlling the lifting unit drive and being switchable via contact surfaces on the pile support board, a first plurality of the switch elements arranged in a first one of the switching stages and a second plurality thereof arranged in a second switching stage, the first plurality thereof being located upstream of the second plurality thereof in a direction towards the collision region, the first plurality thereof being actuatable for switching the lifting unit drive from fast speed operation to a slower speed operation, and the second plurality thereof for switching the lifting unit drive off.
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Buck Helmut
Ganter Udo
Thomas Christian
Eickholt Eugene H.
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
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