Plastic pipe heater

Electric heating – Heating devices – Combined with container – enclosure – or support for material...

Patent

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Details

219521, 219387, F27D 1102, F27B 514

Patent

active

050177605

ABSTRACT:
A plastic conduit heater for use in the field bending of plastic conduit charaterized by a heat sink pipe segment open at both ends with a resistance heating element wrapped around the exterior of the pipe segment and in intimate contact with the exterior of the pipe segment. The element may be prefabricated and is wrapped in spiral turns which may be more closely spaced toward the ends of the pipe so that the pipe segment is heated uniformly throughout its length. The heating element is encased in insulation which is in turn enclosed in a tubular housing. The housing includes a centrally located handle and an adjustable thermostat for varying the temperature depending on field conditions. One or more plastic conduits or pipes may be positioned in the heater for heating to bending temperature and may be left in the heater until required. The heaters may be arranged in tandem to form heaters of different length.

REFERENCES:
patent: Re24738 (1959-11-01), Kueser
patent: 1129842 (1915-03-01), Blatchford
patent: 1184236 (1916-05-01), Hawkes
patent: 1263598 (1918-04-01), Pfanstiehl
patent: 1679424 (1928-08-01), Hopp
patent: 1687858 (1928-10-01), Curtis
patent: 1806942 (1931-05-01), Hendricks
patent: 1930836 (1933-10-01), D'Amico
patent: 2145324 (1939-01-01), Stauss
patent: 2760045 (1956-08-01), Blue
patent: 2823292 (1958-02-01), Kunzle
patent: 2828402 (1958-03-01), Paolicelli

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