Cutting – With means to convey work relative to tool station – Cut made parallel to direction of and during work movement
Patent
1988-09-22
1990-04-10
Schran, Donald R.
Cutting
With means to convey work relative to tool station
Cut made parallel to direction of and during work movement
83344, 83346, 83348, 83659, B26D 156
Patent
active
049149954
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
Schran Donald R.
Speciale Charles J.
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