Cutting – Processes – During movement of work past flying cutter
Patent
1988-09-16
1990-04-03
Yost, Frank T.
Cutting
Processes
During movement of work past flying cutter
83 39, 83303, 83348, 834044, 83435, 83678, B26D 156
Patent
active
049130137
ABSTRACT:
A method and apparatus particularly suited for cutting continuously moving thermoplastic film such as linear low density polyethylene and includes a stationary anvil, preferably a roller of tool steel and a tungsten carbide die mounted for rotation along a circular arc intersecting the anvil. In an embodiment for punching holes in the film, the apparatus includes a saddle shaped hollow tungsten carbide die projecting slightly above the cylindrical surface of a roll passing under a spring biased tool steel roller for cutting a semicircular hole in a continuously moving continuous plastic film web for the manufacturer draw tape bags. A vacuum is supplied to the center of the die for removing the segment of plastic film cut out by the apparatus. In an alternate embodiment, the rotary cutting apparatus includes a tungsten carbide plate member having a straight cutting edge is rotated along a circular arc at the end of support mounted to a shaft to intersect a spring biased roller supported along the arc to cut a perforation in a continuous plastic film passed between the straight cutting edge and roller. The alternate embodiment is suited for employing a plurality of the rotary cutting devices at spaced stations for cutting perforations across a moving film web.
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Jones Eugenia A.
McKillop Alexander J.
Mobil Oil Corporation
Speciale Charles J.
Yost Frank T.
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