Method for impregnating a tubular resin-absorbable liner with re

Details Method for impregnating a tubular resin-absorbable liner with re Method for impregnating a tubular resin-absorbable liner with re

1998-03-18

2000-04-25

Bell, Janyce

Coating processes

Interior of hollow article coating

Vacuum or pressure utilized

156287, 4273855, B05D 722, B32B 108

Patent

active

060541806

ABSTRACT:
A method for impregnating a resin-absorbable tubular liner with a hardenable liquid resin: (a) a hose is connected to a vacuum pump; (b) the hose is inserted into the liner in a manner such that the open end of the hose comes close to, but sufficiently distant from, one end of the liner; (c) the other end of the tubular liner is closed over the hose in a manner such that the hose can freely slide through the closed end of the tubular liner; (d) a predetermined amount of the hardenable liquid resin is injected into the tubular liner through the open end of the tubular liner; (d') the open end of the tubular liner is substantially closed by placing it between a pair of rollers; and (e) the vacuum pump is operated to evacuate the hose while at the same time the hose and/or the resin-absorbable tubular liner are moved in a manner such that the length of the hose inside the liner is reduced.

REFERENCES:
patent: 5348764 (1994-09-01), Yokoshima et al.
patent: 5354586 (1994-10-01), Yokoshima et al.

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