Apparatus for welding a joint between plastic pipes
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United States of America Patent
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-
May 15, 1984
Issued Date -
N/A
app pub date -
Jul 2, 1982
filing date -
Mar 10, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A welded joint for plastic pipe is formed by apparatus including a sleeve (6) which is placed over the place where the pipes are joined and a heating mat (3) which is inserted between the sleeve and the pipes. The heating mat (3) and the sleeve (6) are provided with gear-tooth system (4, 5, 114, 115) which engage each other in the assembled condition of the device. Consequently, the surfaces of the ends of the heating mat (3) and the sleeve (6) which are in contact are circumferentially extended, resulting in a satisfactory welded joint, even where large pipe tolerances are involved.
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