Device for forming the gasket housing in the socket joints of pl

Details Device for forming the gasket housing in the socket joints of pl Device for forming the gasket housing in the socket joints of pl

1978-06-01

1979-05-22

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

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

Including product handling means

425392, 425393, 425DIG218, B29C 1700

Patent

active

041556941

ABSTRACT:
Disclosed herein is a device for forming the gasket housing in the socket joints of plastic material tubes, comprising a ring placed inside a housing made circumferentially in an expander that can be inserted in the end of the tube to be widened, the said ring comprising a first ring, that is to say, an inner ring, provided internally and circumferentially with a groove defining the chamber on which the expansion compressed air acts, the said first ring being made of an elastic material that "gives"; a second ring that can be coupled externally and coaxially to the said first ring, made of an elastic material of a hardness somewhat greater than that of the aforementioned first ring; and a number of metal pins, parallel with one another, placed over the outside circumference of the said first ring.

REFERENCES:
patent: 3377659 (1968-04-01), Hucks
patent: 3484900 (1969-12-01), Sands et al.
patent: 3776682 (1973-12-01), Parmann
patent: 3907481 (1975-09-01), Heisler
patent: 4030872 (1977-06-01), Parmann
patent: 4061459 (1977-12-01), Parmann

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