Stock feeder for punch presses and the like

Details Stock feeder for punch presses and the like Stock feeder for punch presses and the like

1978-07-27

1980-06-17

Gilreath, Stanley N.

Advancing material of indeterminate length

By intermittent material-mover

With retrograde movement preventer

226162, B65H 1736, B65H 1744

Patent

active

042079993

ABSTRACT:
An improved control circuit for the pneumatically operated punch press feeder illustrated in U.S. Pat. No. 3,038,645; the use of which circuit permits a simplification of the construction of the feeder by enabling the stock clamping as well as the stock gripping motors of feeder to be single acting. This improved circuit and the resultant simplification of structure will allow benefits of the sequencing action of the dual valve system to be retained while reducing the cost of manufacture and maintenance of such a feeder.

REFERENCES:
patent: 2406508 (1946-08-01), Papsdorf
patent: 2467740 (1949-04-01), Haller
patent: 2803335 (1957-08-01), Powers
patent: 3038645 (1962-06-01), Nordlof
patent: 3157334 (1964-11-01), Bunnell et al.
patent: 3429493 (1969-02-01), Lehmann
patent: 3462056 (1969-08-01), Scribner
patent: 3512438 (1970-05-01), Burdge

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