Slit sealing apparatus

Details Slit sealing apparatus Slit sealing apparatus

1980-02-04

1981-12-29

Wityshyn, Michael G.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With cutting, punching, piercing, severing, or tearing

156271, 1563084, 156497, 156499, 156582, 493192, 493197, B32B 3118, B32B 3126

Patent

active

043080871

ABSTRACT:
A method for dividing an extruded tube into a plurality of smaller tubes is disclosed. The method includes the steps of flattening the tube into a web, sealing one or more longitudinal strips, or paths, along the web, and cutting generally the middle of the paths to separate the different smaller pieces. The apparatus includes a roll having a raised platen circumferentially thereof, and an air distributor to direct heated air against the web on the platen to effect a seal in the area of the platen. The web, with the sealed strips, is moved past a knife that severs the strip, and the knife is heated to prevent the accumulation of material thereon.

REFERENCES:
patent: 2474035 (1949-06-01), Crandon
patent: 2990875 (1961-07-01), Samuels et al.
patent: 3486955 (1969-12-01), Pabo
patent: 3772112 (1973-11-01), Lyons et al.
patent: 3811984 (1974-05-01), Joonase
patent: 3884746 (1975-05-01), Loliger
patent: 4070222 (1978-01-01), Olson

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