Sheet feeding or delivering – Feeding – Pack holders
Patent
1992-10-29
1994-03-22
Bollinger, David H.
Sheet feeding or delivering
Feeding
Pack holders
271154, B65H 118
Patent
active
052956784
ABSTRACT:
A system and method for controlling the lifting of a stack of sheets to be printed in order to keep the currently uppermost sheet of the stack within a certain predetermined height range for reliable removal to a feed table. A motor is operated in either a discontinuous mode or in a continuous mode to lift the sheets, the mode of operation being chosen in dependence on the speed of the press and the thickness of the sheets when compared against an established curve. A sensor is utilized to determine the vertical position of the uppermost sheet in the stack. In the continuous mode the motor speed is adjusted in accordance with the height of the uppermost sheet in the stack, while in the discontinuous mode, the motor is energized and de-energized such that the height of the currently uppermost sheet in the stack is maintained within a predetermined height range.
REFERENCES:
patent: 3125337 (1964-03-01), Cruzen
patent: 4273323 (1981-06-01), Kancko et al.
patent: 4457508 (1984-07-01), Eichler et al.
patent: 4624454 (1986-11-01), Grutzmacher et al.
patent: 4832329 (1989-05-01), Rodi et al.
patent: 5104109 (1992-04-01), Kubo
Blumor Joachim
Lindner Bernd
Volz Albrecht
Bollinger David H.
MAN Roland Druckmaschinen AG
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