Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1975-07-21
1977-06-07
Hoag, Willard E.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 93, 264 99, 264146, 264173, 264177R, 264209, 264210R, 264257, 264271, 264279, B29D 300, B29D 900, B29D 2304, B29F 300
Patent
active
040284565
ABSTRACT:
Method of making a weatherseal is made by extruding a resin base with a relatively thick, flat support portion and a relatively thin, portion U-shaped in cross section and joined to opposite side edges of the support portion to arch over the center of the support portion. While the resin material is still plastic, a pressure differential expands the U-shaped portion to reduce the thickness of the walls of the U-shaped portion, and then each side of the U-shaped portion is cut at a predetermined distance from the support to leave a pair of thin, spaced-apart resilient fins. Then fibrous pile material is secured to the support between the fins to form a double-fin, pile weatherseal.
REFERENCES:
patent: 3068136 (1962-12-01), Reid
patent: 3152002 (1964-10-01), Wisotzky et al.
patent: 3235438 (1966-02-01), Wisotzky
patent: 3296661 (1967-01-01), De Moustier
patent: 3359686 (1967-12-01), Kondolf
patent: 3404487 (1968-10-01), Johnson
Randolph et al, Plastics Engineering Handbook, Reinhold, N.Y. (1960) p. 501 relied on.
Hoag Willard E.
Schlegel Corporation
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