Sheet feeding or delivering – Feeding – With means to interrupt feeding
Patent
1973-11-19
1976-11-23
Saifer, Robert W.
Sheet feeding or delivering
Feeding
With means to interrupt feeding
270 56, B65H 712
Patent
active
039933032
ABSTRACT:
A printing machine receives single sheets which are removed from a stack by the suction cups of a feeding mechanism which is combined with a monitoring unit serving to detect the absence of sheets at the undersides of suction cups or the lifting of two or more sheets. The monitoring unit employs a transducer having two feelers which determine the thickness of lifted sheet material and an indicating device which is actuated by the feelers and produces signals serving to indicate the absence of sheets, the lifting of two or more sheets and/or to control the operation of the printing machine. The suction cups can form part of the transducer when the latter is designed to detect only the absence of sheets or they form part of a second transducer which is provided in addition to the first mentioned transducer.
REFERENCES:
patent: 1109127 (1914-09-01), Juengst
patent: 2357850 (1944-09-01), Reid
patent: 2812941 (1957-11-01), Tebbs
patent: 2869867 (1959-01-01), Backhouse
patent: 3591170 (1971-07-01), Doughty et al.
patent: 3713646 (1973-01-01), Derc
patent: 3724687 (1973-04-01), Marschke et al.
patent: 3744787 (1973-07-01), Morrison
patent: 3796424 (1974-03-01), Fox
patent: 3826487 (1974-07-01), Forster et al.
Forster Karl-Heinz
Johne Albrecht
Johne Hans
Jungnickel Regina
Lein Werner
Saifer Robert W.
Striker Michael J.
VEB Polygraph Leipzig Kombinat fur Polygraphische Maschinen und
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