Cutting – Means to drive or to guide tool – Unicyclic
Patent
1980-05-19
1981-12-01
Yost, Frank T.
Cutting
Means to drive or to guide tool
Unicyclic
83535, 83617, 83639, B26D 512
Patent
active
043029981
ABSTRACT:
Fast head operating device for flag type die-cutting machines, comprising a hydraulic circuit with one end connected to a feed pump and the other to two cylindrical chambers defined at the base of a column supporting the head of the die-cutting machine, the hydraulic circuit comprising a control valve, equipped with a seal which slides into and is engaged in the body of the same valve to form a fluid communication between a feed conduit and a first inlet conduit, which flows into one of said cylindrical chambers for the rise of the column and with a second inlet conduit which flows into the other cylindrical chamber for the downstroke of the abovementioned column. Interposed on said first inlet conduit, a sequence valve is provided while a further fluid conduit branching from the second inlet conduit, flows into a cylindrical chamber into which a small piston slides and is engaged, carrying, at the opposite end, the mobile contact of a pressure switch connected to the electric operating device.
REFERENCES:
patent: 2792883 (1957-05-01), Pokorski
patent: 3171318 (1965-03-01), Muhlbach
patent: 3174377 (1965-03-01), Lischer
patent: 3474695 (1969-10-01), Longval
patent: 3854362 (1974-12-01), Cantella
Atom S.p.A.
Yost Frank T.
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