Apparatus for forming a thickened bell end on thermoplastic pipe

Details Apparatus for forming a thickened bell end on thermoplastic pipe Apparatus for forming a thickened bell end on thermoplastic pipe

1976-10-07

1977-12-27

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

425DIG218, 264322, B29C 112

Patent

active

040652432

ABSTRACT:
An apparatus for forming a bell end having a thickened portion on a pipe composed of thermoplastic material, in which an annular shaping space is established between a shaping sleeve and a mandril having an elastic shaping ring, the height of the shaping space increasing along transition portions of the surfaces of the sleeve and the mandril to a region defining a sealing chamber and then decreasing again.

REFERENCES:
patent: 3205535 (1965-09-01), Niessner et al.
patent: 3360826 (1968-01-01), Lorang
patent: 3432887 (1969-03-01), Poux et al.
patent: 3893794 (1975-07-01), Acda
patent: 3986810 (1976-10-01), LaBranche et al.

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