Cutting – Means to drive or to guide tool – With simple rectilinear reciprocating motion only
Patent
1977-05-09
1978-12-19
Schran, Donald R.
Cutting
Means to drive or to guide tool
With simple rectilinear reciprocating motion only
83630, 83639, 91394, 417506, B26D 512, B27L 508
Patent
active
041300416
ABSTRACT:
An anvil roll has a steel core and an outer portion of polyurethane. The roll is slightly rotated after a number of veneer clipping operations by a clutch which drives the roll after the roll is pushed by a knife down away from arcuate braking surfaces. An airbag normally urges the roll into engagement with the braking surfaces and is collapsed during adjustment of the roll. Operation of the clutch is prevented during the clipping operation. A double-acting cylinder drives the knife through a toggle joint linkage, and cushioning cylinder means aid in overcoming inertia of the knife at the start of a clipping cycle and also cushion the return of the knife. The cylinder has poppet check valves to rapidly admit air thereto.
REFERENCES:
patent: 1982770 (1934-12-01), Tollison
patent: 2772831 (1956-12-01), Cotter
patent: 3837250 (1974-09-01), Lumn
Plymak Company, Inc.
Schran Donald R.
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