Method of manufacturing heat-weldable thermoplastic fittings

Details Method of manufacturing heat-weldable thermoplastic fittings Method of manufacturing heat-weldable thermoplastic fittings

1987-09-02

1989-05-02

Echols, P. W.

Metal working

Method of mechanical manufacture

Electrical device making

29423, 285 21, 219544, 26427218, 264163, 264278, 264334, 156294, H05B 358

Patent

active

048255343

ABSTRACT:
Welding muffs for joining thermoplastic pipes are molded using a core in which are placed terminals supported by plastic posts which may be removable and/or frangible so that when the cores are withdrawn the plastic posts do not prevent withdrawal.

REFERENCES:
patent: 3061503 (1962-10-01), Gould et al.
patent: 3062940 (1962-11-01), Bauer et al.
patent: 3549477 (1970-12-01), Burgman
patent: 3943334 (1976-03-01), Strum
patent: 3987276 (1976-10-01), Vogelsanger et al.
patent: 4313053 (1982-01-01), Sturm
patent: 4362684 (1982-12-01), Thalmann
patent: 4365144 (1982-12-01), Reich et al.
patent: 4530521 (1985-07-01), Nyffeler
patent: 4622087 (1986-11-01), Ansell
patent: 4727242 (1988-02-01), Barfield

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