Apparatus for sealing inserts between sheets of plastic material

Details Apparatus for sealing inserts between sheets of plastic material Apparatus for sealing inserts between sheets of plastic material

1981-07-23

1983-05-17

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With work feeding or handling means

100 93R, 100 93RP, 100153, 156555, 1565835, B32B 3108

Patent

active

043838820

ABSTRACT:
A device is arranged to seal inserts between a pair of plastics material sheets. The device includes a double belt press forming a heat sealing press and made up of a pair of press belts one located above the other. Each of the press belts includes an inlet roller, an outlet roller and a belt trained over the inlet and outlet rollers. Supply or guide rollers direct the plastics material sheets onto the belts at the inlet rollers. The inlet rollers are heated and the guide rollers are selectively positionable relative to the inlet rollers so that the contact of the plastics material sheets with the belts at the inlet rollers can be selectively varied for providing the desired heating action. The inserts are sealed between the sheets as they pass between the press belts. At the outlet roller ends of the press belts the sealed inserts are separated from the plastics material sheets. The temperature of the heated inlet rollers is maintained within .+-.1.degree. centigrade by circulating thermal oil through them. The guide rollers are supported from the inlet rollers by arms so that they can be pivoted about the axes of the inlet rollers.

REFERENCES:
patent: 2510229 (1950-06-01), Joa
patent: 2596068 (1952-05-01), Bunch et al.
patent: 3783666 (1974-01-01), Rosansby et al.
patent: 4193830 (1980-03-01), Milne
patent: 4283246 (1981-11-01), Held

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