Joinder of plastic pipe

Details Joinder of plastic pipe Joinder of plastic pipe

1975-11-21

1976-11-30

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

Molded joint facilitator

156294, 156304, 156306, 156499, 156503, 285150, 285156, 285423, 285331, F16L 1302

Patent

active

039945154

ABSTRACT:
Plastic elements, such as conduit, and method and apparatus for joinder of same characterized by respective regions, or surfaces, of hot-to-cold plastic adjacent regions of hot-to-hot plastic for forming a substantially immediate physical fixation of the hot-to-cold regions and followed by a more nearly perfect sealing fusion of the hot-to-hot regions to form a strong sealing joint. In a specific embodiment, a tubular end is joined to a fitting in which the fitting has one or more annular recesses about its bore for allowing expanded, excess molten plastic to flow thereinto and become solidified for a strong sealed joint. This also eliminates forming streamers that frequently caused leaks in the joints heretofore. Also disclosed are the details of the apparatus for heating the respective regions, or surfaces, of the plastic elements.

REFERENCES:
patent: 2739829 (1956-03-01), Pedlow et al.
patent: 2741402 (1956-04-01), Sayre
patent: 2958906 (1960-11-01), Youthed
patent: 3378672 (1968-04-01), Blumenkranz
patent: 3506519 (1970-04-01), Blumenkranz
patent: 3788928 (1974-01-01), Wise

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