Advancing material of indeterminate length – By intermittent material-mover – Unicyclic mover
Patent
1987-03-13
1988-06-28
Levy, Stuart S.
Advancing material of indeterminate length
By intermittent material-mover
Unicyclic mover
226147, 226150, 226158, 226162, B65H 2000, B65H 2306
Patent
active
047533811
ABSTRACT:
A fluid operated stock feed apparatus for intermittently advancing stock along a feed path. The feed apparatus includes a stationary body having fluid operated stock holding clamps mounted thereon. A stock feed head is mounted for reciprocation relative to the body and has fluid operated stock feed clamps mounted thereon and a feed piston is mounted in the body for extending and retracting the stock feed head. A main control valve is provided in the body for controlling the application of fluid pressure to the fluid pressure operated stock holding and stock feed clamps and a pressure operated auxiliary valve is provided in the body and is responsive to the pressure from the main control valve for controlling the application of fluid pressure to the feed piston. The main body is formed with a main bore therethrough and the feed cylinder is provided in one portion of the main bore and the pressure operated auxiliary valve including an auxiliary valve casing, an auxiliary valve member and a pressure actuator therefor, is mounted in another portion of the main bore at one end of the feed cylinder. The feed cylinder is formed by a sleeve disposed in the bore and arranged to provide a pressure chamber around the sleeve.
REFERENCES:
patent: 3038645 (1962-06-01), Nordlof
patent: 4095733 (1978-06-01), Scribner
patent: 4175688 (1979-11-01), Scribner
patent: 4669645 (1987-06-01), Nordlof
Levy Stuart S.
Pillote Vernon J.
Sohacki Lynn M.
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