Method of heating an end of a length of plastic pipe and a circu

Details Method of heating an end of a length of plastic pipe and a circu Method of heating an end of a length of plastic pipe and a circu

1981-07-01

1982-10-05

Camby, John J.

Heating

Processes of heating or heater operation

Treating an article, container, batch or body as a unit

34104, 219368, 219400, 432225, F27D 500, F24J 300, F26B 2500

Patent

active

043526594

ABSTRACT:
A method and a circulating-air furnace for heating one end of a length of plastic pipe for the purpose of belling the end of the pipe. The circulating air is made to flow through a fan and a heater and thereinafter along the outer and inner faces of the pipe end. In order to improve the adjustability of the heating of the pipe end, the circulating air is blown as an annular shaped flow in the direction of the center axis of the pipe end towards the pipe end so that the air flow is divided onto the inner and outer faces of the pipe.

REFERENCES:
patent: 3706824 (1972-12-01), Huber et al.
patent: 4014640 (1977-03-01), Emery et al.
patent: 4203721 (1980-05-01), Hayes et al.
patent: 4255137 (1981-03-01), Guyer

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