Advancing material of indeterminate length – By intermittent material-mover – Comprising reciprocating or oscillating material-mover
Patent
1977-05-25
1978-06-20
Schacher, Richard A.
Advancing material of indeterminate length
By intermittent material-mover
Comprising reciprocating or oscillating material-mover
B65H 1736
Patent
active
040957330
ABSTRACT:
A pneumatic stock feeder for punch presses and the like, said feeder having an improved fluid actuating and control system. The feeder is provided with a stock gripping fluid motor means and a feed slide actuating fluid motor means; which fluid motor means are adapted to be controlled by an improved four-way slide valve arrangement. The slide valve includes a flat plate surface on which is disposed a recesses valve cup or pad that is laterally translatable between two operative valving positions. The recesses valve cup has a flat valving surface formed thereon that slidably engages said flat plate surface and valvingly cooperates with at least three ports formed in said flat plate surface so as to thereby control the operation of said fluid motor means. A control plunger and an associated coupling means are adapted to laterally shift said valve pad between its two operative positions in response to the movement of the ram of said punch press.
REFERENCES:
patent: 3038645 (1962-06-01), Nordlof
patent: 3157334 (1964-11-01), Bunnell
patent: 3326438 (1967-06-01), Dickerman
patent: 3462056 (1969-08-01), Scribner
patent: 3580449 (1971-05-01), Chaban
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