Advancing material of indeterminate length – Convertible
Patent
1978-01-31
1980-09-23
Skaggs, H. Grant
Advancing material of indeterminate length
Convertible
226112, 226150, 226141, 226162, 83277, B65H 1726
Patent
active
042238218
ABSTRACT:
A press-feed unit is operative to feed a length of stock material to a press. The unit comprises a body for fixing adjacent the press and a transport section reciprocable relative to the body by a pneumatic piston and cylinder assembly, the stock being clamped to the transport section during forward feed strokes of the latter. The unit further comprises a control valve, and a transport feed valve which is controlled by a pilot pressure signal from the control valve and operable to feed the transport cylinder. A pilot signal connection is provided which can be blanked off to enable the unit to operate independently, or connected through a pilot pressure pipe to a basically similar unit to provide a duplex arrangement of two units, one of which is directly controlled in dependence on press ram position and provides a pilot signal through said pipe to operate the transport feed valve of the other unit.
REFERENCES:
patent: 2929626 (1960-03-01), Weymouth
patent: 3038645 (1962-06-01), Nordlof
patent: 4051987 (1977-10-01), Scribner
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