Electrothermal fusion of large diameter pipes by electric heatin

Details Electrothermal fusion of large diameter pipes by electric heatin Electrothermal fusion of large diameter pipes by electric heatin

1993-01-14

1993-10-12

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156196, 156211, 156221, 1562742, 1563043, 1563082, 285419, B32B 3100, F16L 2100

Patent

active

052521575

ABSTRACT:
Methods of producing electrically fusable sleeve connectors for connecting large diameter thermoplastic pipe sections and the sleeve connectors produced by such methods are provided. Methods of sealingly connecting adjacent ends of a pair of large diameter thermoplastic pipe sections by electric fusion are also provided. The methods of producing electrically fusable thermoplastic sleeve connectors broadly include the steps of winding a tape of molten thermoplastic material onto a large diameter core drum whereby adjacent windings are fused and upon being cooled a solid sleeve is formed, embedding an electric resistance heating wire in a surface of the sleeve while the thermoplastic material is still in the molten state and removing the sleeve after cooling with electric resistance heating wire embedded therein from the core drum.

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