Safety device and method in a sheet feeder of a sheet-fed proces

Details Safety device and method in a sheet feeder of a sheet-fed proces Safety device and method in a sheet feeder of a sheet-fed proces

1993-08-30

1995-04-11

Olszewski, Robert P.

Sheet feeding or delivering

Feeding

Pack holders

271159, B65H 108, B65H 130

Patent

active

054051304

ABSTRACT:
Safety device in a sheet feeder of a sheet-fed processing machine includes a freely revolving pile-lifting chain for lifting and lowering a feed pile, a first drive for entraining pile-lifting chain with a driving connection so as to lift the feed pile, a second drive for entraining the pile-lifting chain with a driving connection so as to lower the feed pile, and a device for disconnecting at least one of the driving connections of the first and the second drives with the pile-lifting chain for lowering the feed pile when a limit value for a force exerted by the feed pile upon the pile-lifting chain is exceeded; and a safety method.

REFERENCES:
patent: 669678 (1901-03-01), Bridgewater
patent: 1866562 (1932-07-01), Graf
patent: 3035835 (1962-05-01), Reif et al.
patent: 3446501 (1969-05-01), Gates
Patent Abstract of Japan No. JP 62-285827 (Aoki) Dec. 11, 1987.
Patent Abstract of Japan No. JP 58-135040 (Tonomura) Aug. 11, 1983.

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