Method of producing a channeled plastic pipe with closed channel ends
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United States of America Patent
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Oct 2, 1984
Issued Date -
N/A
app pub date -
Mar 1, 1982
filing date -
Nov 12, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of producing plastic pipe having air channels axially extending through the wall thereof, with at least one of the respective ends of the air channels being closed by an annular slotted channel-closure filled with a caulking material in its annular slot. The channel-closure is force-fitted on the pipe end, so that the caulking material is pressed into the air channels.
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