Clamp for making tubing
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United States of America Patent
Stats
-
Dec 2, 1997
Grant Date -
N/A
app pub date -
Oct 16, 1995
filing date -
Oct 16, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for applying pressure and heat to a tubular workpiece made up of layers of wood and bonding agent and formed on a tubular mandrel having a sealed, slit tube engageable with the exterior of the workpiece and acting with a housing and end walls to form an air pressure chamber by which the slit tube can be circumferentially expanded and contracted throughout its length and at the same time heat can be applied to the housing to heat the exterior of the tubular workpiece while heated air is circulated through the tubular mandrel on which the workpiece is supported to accelerate curing.
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