Method of everting a tube

Details Method of everting a tube Method of everting a tube

1994-11-30

1998-11-03

Timm, Catherine

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including hydrostatic or liquid pressure

264 36, 264269, 264516, 264558, 156287, 156294, 427238, B29C 6336

Patent

active

RE0359440

ABSTRACT:
In a tube eversion apparatus a first chamber in which the eversion pressure in developed is controllably sealed by a sphincter-type valve, the valve being in turn actuated by pressure developed in a preferably separately controllable and adjustable second chamber, another chamber preferably being provided above the sphincter-type valve for containing a supply of liquid and limiting turbulence from any escape of fluid past the sphincter-type valve, the other chamber also providing apparatus for supplying heated fluid to a lay-flat hose adapted to be pulled through the everted. Use of the improved apparatus involves appropriate modifications of the usual eversion process involving applying and controlling the everting pressure and the pressure exerted against the sphincter-type valve by the fluid in the second chamber.

REFERENCES:
patent: 4368091 (1983-01-01), Ontsuga et al.
patent: 4385885 (1983-05-01), Wood
patent: 4685983 (1987-08-01), Lang, Jr.
Brochure by "Inpipe", a Scandinavian company, 6 pages date unknown but pre-1990.

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