Method and apparatus for butt welding of plastic pipes of large

Details Method and apparatus for butt welding of plastic pipes of large Method and apparatus for butt welding of plastic pipes of large

1981-11-19

1983-08-30

Wityshyn, Michael G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1562733, 1563042, 1563045, 1563046, 1563798, 156391, 156499, 156502, 156509, 156558, B29C 2702

Patent

active

044014970

ABSTRACT:
The welding apparatus serves for the purpose of butt-welding of plastic pipes of diameters larger than 500 mm. All the work is performed by means of the welding apparatus from inside the pipe. Thereby the working time is reduced, the welding quality ensured, and the installation becomes faster. Lifting cranes and heating tents become unnecessary. A novelty is also the possibility of welding pipes together at an angle position. As the welding apparatus is collapsible, it may also be advantageously used for repair work on old pipes in the ground (relining), with a minimum exposure of the pipes.

REFERENCES:
patent: 3729360 (1973-04-01), McElroy
patent: 3793119 (1974-02-01), Province
patent: 3846208 (1974-11-01), McElroy
patent: 4054473 (1977-10-01), Ohnstad
patent: 4338153 (1982-07-01), Zimmerman

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