Hotseal jaws and cutoff knife assembly for processing thermoplas

Details Hotseal jaws and cutoff knife assembly for processing thermoplas Hotseal jaws and cutoff knife assembly for processing thermoplas

1989-12-06

1991-05-14

Terrell, William E.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493199, 493206, 493470, 156581, 1565831, B31B 2316, B31B 2364

Patent

active

050152238

ABSTRACT:
Thermoplastic film bag making material is processed between a hotseal jaw and cutoff knife assembly. The apparatus has complementary first and second jaws between which the material is received for sealing bag side edge areas of the bag making material. The first jaw has a groove and the second jaw has a cutoff knife for extension into the groove for separating the material into individual bags. A rubber anvil block is in a groove underlying a zipper of the bag material and the knife thrusts into the block and attains substantially straight edges in the bag cutoff. Improved end sealing of the zipper also results.

REFERENCES:
patent: Re29362 (1977-08-01), Reid
patent: 3575090 (1971-04-01), Hook
patent: 3770543 (1973-11-01), Darabant
patent: 4010063 (1977-03-01), Natter
patent: 4256024 (1981-03-01), Carlisle
patent: 4304615 (1981-12-01), Siegel
patent: 4355494 (1982-10-01), Tilman
patent: 4617683 (1986-10-01), Christoff

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