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US 5,349,890 AGranted
Apparatus for severing off pieces from an endless web
AssigneeScovill Fasteners Inc.
InventorsJohn J. Butkus, Paul R. Bird
Life of this patent
Estimating the term…
Abstract
A heated knife has a motor adapted to drive the knife against a cutting block with the web inbetween. The knife body is metal and has a cutting edge with side surfaces at an obtuse angle to each other. The knife is formed with a lengthwise bore which houses a Calrod capable of heating the knife up to about 950.degree. F. The knife body has relatively thin lateral ears spaced from the heater and which receive support bolts from the opposite ends of a driving yoke by which the motor drives the knife. This arrangement reduces the amount of heat withdrawn from the knife.
Claims4
In combination:
- a. an endless web of synthetic fabric,
- b. a severing apparatus comprising:
- 1. a bed having guide means for guiding the web on a path through the apparatus and having a flat metal cutting block disposed horizontally in the bed transverse to the path, the block being directly underlaid by a layer of resilient material,
- 2. support means secured to the bed and extending upward on opposite sides of the path,
- 3. vertically reciprocating drive means mounted on the support means above the block and comprising a vertically disposed pneumatic cylinder having a piston operatively disposed therein, a connecting rod connected thereto and extending through a sealed opening in the lower end of the cylinder, a horizontally disposed yoke secured at its center to the lower end of the rod.
2 more elements
Dependencies are inferred from the claim text.