Method for making racket frames

Details Method for making racket frames Method for making racket frames

1980-11-17

1982-11-30

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

156173, 156229, 156245, 2642884, 264313, 264319, 264334, B29C 700, B29D 302

Patent

active

043615333

ABSTRACT:
Two small diameter fiberglass tubes are rolled on silicone rubber slugs and inserted into a larger cylinder which is then pinched into a figure-8 shape. This is put in the curing mold. When heated the silicone rubber expands to push the fiberglass into contact with mold surfaces. After cooling the slugs can be pulled lengthwise, which reduces their diameter so they are self freeing from within the cured frame.

REFERENCES:
patent: 1563529 (1925-12-01), Satterlee
patent: 3234309 (1966-02-01), Graff
patent: 3270111 (1966-08-01), Haldeman
patent: 3294887 (1966-12-01), Altermatt
patent: 3641230 (1972-02-01), Jenks
patent: 3795559 (1974-03-01), Horn et al.
patent: 4183776 (1980-01-01), Staub et al.
patent: 4204681 (1980-05-01), Hall et al.
patent: 4264389 (1981-04-01), Staub et al.
Anon. Mod. Plastics Handbook, McGraw Hill N.Y. (1966) pp. 30 & 31 Relied On.

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