Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1980-10-14
1984-03-27
McCamish, Marion
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
273 61R, 273 61B, 428 85, 428 91, 428280, 428288, 428300, 428301, A63B 3900
Patent
active
044394713
ABSTRACT:
A tennis ball conforming to the 1968 regulation of the International Federation of Lawn Tennis comprises a hollow elastic core and an improved cover bonded to the core by an adhesive mixture. The cover has a specific weight less than 0.22 g/cm.sup.3 and includes a proportion of relatively thick monofilament fibers such that the percentage-weighted average denier size of all fibers in the cover is at least 18. The cover improves the playing characteristics and the effective life of the ball.
REFERENCES:
patent: 3396970 (1968-08-01), Fraser
Biard Francoise M. H.
Lacoste Francois R.
McCamish Marion
Patentex S.A.
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