Receptacles – Receptacle side wall made of two or more layers of material... – Beverage receptacle
Patent
1984-08-07
1986-05-06
Hoag, Willard E.
Receptacles
Receptacle side wall made of two or more layers of material...
Beverage receptacle
294695, 29526R, 156 69, 1562739, 1563066, 220319, 220359, 264 27, 264248, B29C 6500
Patent
active
045866244
ABSTRACT:
A method and device for heat sealing thermoplastic materials is disclosed. A pair of flat resistance wires are encased within a plastic sheath and arranged in parallel with their flat surfaces lying in one plane. The wires are spaced from each other in a manner designed for maximum thermal emission. To weld together two thermoplastic materials, the sheathed wires are held between and in firm contact with the materials to be joined. A predetermined electric current is passed through the wires until enough heat has been generated to weld the materials together. The invention may also be applied to a process for heat sealing plastic lids to plastic drums. In particular, the sheathed wires are fastened to the lower surface of a thermoplastic drum lid. The lid, together with the resistance wires is clamped to a thermoplastic drum with a standard drum clamp. An electric current is passed through the wires for a period of time sufficient to heat up the wires and weld the lid to the drum.
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Bondico, Inc.
Hoag Willard E.
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