Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work – To degas or prevent gas entrapment
Patent
1996-05-28
1999-03-02
Maki, Steven D.
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
To degas or prevent gas entrapment
138 97, 138141, 156 87, 156155, 156294, 264269, 264313, 427238, 427294, 427296, 428 362, B05D 300, B29C 6334, F16L 5516
Patent
active
058766456
ABSTRACT:
A tube which is normally in a collapsed position and which has an inner layer, suitably of felt. The free end of the tube is pulled apart and a pool of resin is located within the tube. Opposed driven rollers then pull the free end of the tube to assist in the dispersion of the resin in the felt. To assist in the resin impregnating the felt a vacuum is applied to urge the felt on either side of the collapsed tube so that the sides are more towards each other in the region of the pool of resin. In order for the vacuum to be able to be applied in the region of the pool of resin the vacuum is applied to the trailing end of the tube and an insert comprising a strip of material that is less prone to collapse than the felt of the tube is located along the inside of the felt. Thus, even though the felt may compress to a relatively higher degree thereby inhibiting the passage of the vacuum along the tube through the felt, the stiffer material of the insert still allows the vacuum to be pulled along the length of the tube.
REFERENCES:
patent: 3827130 (1974-08-01), Baumann
patent: 4009063 (1977-02-01), Wood
patent: 4182262 (1980-01-01), Everson et al.
patent: 4366012 (1982-12-01), Wood
patent: 5354586 (1994-10-01), Yokoshima et al.
patent: 5549856 (1996-08-01), Yokoshima
patent: 5699838 (1997-12-01), Catallo et al.
patent: 5794663 (1998-08-01), Kiest et al.
Applied Felts Limited
Maki Steven D.
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