Method of expanding polymeric tubing

Details Method of expanding polymeric tubing Method of expanding polymeric tubing

1996-05-31

1998-03-31

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264 85, 264566, B29C 6700

Patent

active

057334870

ABSTRACT:
An apparatus and process for expanding polymeric tubing including a bubble of trapped gas within the polymeric tubing. The tubing is expanded by creating a pressure differential between the inside and outside of the tubing such that the pressure inside the tubing is greater than the pressure outside the tubing, thereby causing the tubing to expand. It is possible with the present invention to compensate for loss of gas pressure, thereby increasing the amount of tubing which can be expanded without ceasing production and restarting the process.

REFERENCES:
patent: 3086242 (1963-04-01), Cook et al.
patent: 3370112 (1968-02-01), Wray
patent: 3687585 (1972-08-01), Takagi et al.

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