Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Means joining flexible indefinite length or endless bodies...
Patent
1988-08-15
1990-05-01
Bell, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Means joining flexible indefinite length or endless bodies...
156156, 156158, 1563042, 1563046, 156502, 264248, B29C 6526, B29C 6518
Patent
active
049215701
ABSTRACT:
An apparatus for manufacturing a welded connection of tubular components of thermoplastic material includes a bracing device and a heating device to be inserted into the tubular components. The heating device has an expandable hollow body, in the interior of which are arranged an electric heating element and a liquid which expands when heated. When the heating device is heated, the hollow body rests against the ends of the tubular components to be welded together and the necessary welding temperature is transmitted to these components. Since the hollow body rests against the inner circumference of the tubular components, the formation of a welding bead is prevented. After welding has been carried out, the hollow body which has cooled and shrunk is removed by means of a traction strand.
REFERENCES:
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patent: 4288266 (1981-09-01), Konrad et al.
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patent: 4325772 (1982-04-01), Suetoshi et al.
patent: 4401497 (1983-08-01), Worthmann
patent: 4758302 (1988-07-01), Hannover
Bell Michael W.
Georg Fisher AG
Yoder Michele K.
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