Hole punching apparatus for thermoplastic film

Details Hole punching apparatus for thermoplastic film Hole punching apparatus for thermoplastic film

1982-04-12

1984-05-22

Kazenske, E. R.

Cutting

With product handling means

By fluid current

83 16, 83 99, 83133, 83143, 83171, 83682, 83695, B26D 710, B26D 718, B26F 112

Patent

active

044494343

ABSTRACT:
Apparatus for cutting holes and notches in thermoplastic film by using heated steel rule dies. The dies are set into a heated die block, and scrap passes through the die, and through a hole in the heated die block so pieces of scrap fuse together as they pass through the block. The die block is fixed, and a movable platen urges the film down against the heated dies. A stripper is biased up to strip the film from the dies after cutting, and is resiliently movable down to allow cutting. Air can be directed through the stripper to blow the film up, off the stripper, to prevent melting when the film motion stops. Use of two dies accurately spaced can cut wicket holes and provide accurate cutting to assure proper operation in a bagging machine.

REFERENCES:
patent: 1839544 (1932-01-01), Freeman
patent: 2579940 (1951-12-01), Lobrovich
patent: 3075573 (1963-01-01), Piazze
patent: 3129623 (1964-04-01), Lowell
patent: 3368441 (1968-02-01), Piazze
patent: 3465627 (1969-09-01), Vigneault
patent: 3719736 (1973-03-01), Woodruff
patent: 4206667 (1980-06-01), Hirata et al.

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