Method of forming corrugated pipe with a pipe spigot seal seat
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United States of America Patent
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Jul 12, 2011
Grant Date -
Feb 11, 2010
app pub date -
Apr 8, 2005
filing date -
Apr 8, 2004
priority date (Note) -
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Abstract
A piece of corrugated pipe cut from a longer length of pipe is provided with a pipe coupling part by subjecting one or more of the corrugation crests on the pipe to heat and pressure. This reshapes the one or more corrugations to form a seal receiving recessed spigot on the piece of pipe.
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International Classification(s)
- D01D:MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE....
- B26D:CUTTING; DETAILS COMMON TO MACHINES FOR SEVERING, ....
- B28B:SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG O....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- A01J:MANUFACTURE OF DAIRY PRODUCTS
- B23D:PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FI....
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