Sheet feeding or delivering – Feeding – Separator and conveyor
Patent
1990-03-27
1991-11-12
Schacher, Richard A.
Sheet feeding or delivering
Feeding
Separator and conveyor
271 93, 271103, B65H 308
Patent
active
050641840
ABSTRACT:
In the context of a feeder, more especially a sheet feeder, comprising firstly a suction device which is placed over a stack of items to be fed, and has a separating devicre with at least one telescoping and preferably vertically reciprocable lifting suction holder, which when a sucker is covered over is able to be retracted against the action of a returning force by the action of vacuum present at such sucker, and secondly a conveyor device which has at least one reciprocating entraining sucking device and is adapted to have such item transferred to it from the separating device lifting such item from said stack, the invention seeks to achieve trouble-free operation and simplicity of operation by the provision of on the one hand at least one vacuum hold nozzle adjacent to overlapping surfaces of the telescopically engaging parts of each lifting suction holder and adapted to be turned on and off in accordance with the entraining suction motion in a manner independent of the sucker, and there is furthermore an abutting surface associated with the nozzle and resting against same in the retracted position.
REFERENCES:
patent: 2341521 (1944-02-01), Baker
patent: 3702698 (1972-11-01), Schweber
patent: 4327906 (1982-05-01), Frohlich
Georg Spiess GmbH
Schacher Richard A,.
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