Method of making racket frames

Details Method of making racket frames Method of making racket frames

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B21K 17/00 (2006.01) B29D 99/00 (2010.01) A63B 49/10 (2006.01) B29C 33/50 (2006.01) B29C 43/32 (2006.01) B29C 70/34 (2006.01) B29C 70/44 (2006.01) B29C 43/12 (2006.01)

Patent

CA 1173225

TITLE: IMPROVED METHOD OF MAKING RACKET FRAMES INVENTOR: HERBERT R. JENKS 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 length- wise, which reduces their diameter so they are self freeing from within cured frame.

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