Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1988-01-20
1989-08-01
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156145, 156146, 156228, 273 61D, 273 61R, A63B 4100
Patent
active
048530565
ABSTRACT:
A method of making tennis balls by a single core part and fabric piece bonding step is disclosed wherein an assembly of core parts, including a pair of hemispheric core halves, and fabric cover pieces, including a pair of figure eight fabric dumbbells, are assembled to one another to a subassembly of core parts held together by a dried but uncured first curable cement, the fabric pieces are held about the core subassembly by a second dried but uncured cement and a third curable cement is provided between the fabric pieces to form the exterior ball seam. The assembly of core and cover parts and pieces thus held together by the tackiness of dried but uncured cements is then placed within a snugly fitting mold and cured in the presence of heat to bond the core parts to one another, the fabric cover pieces to the core and the fabric piece edges to one another to a completed ball. As a part of the method, one of the core parts is provided with an integrally formed one-way air valve so that the bonding step is accomplished on an unpressurized ball and the bonded ball is then subsequently pressurized by the application of exterior pressure which enters the interior of the ball through the one-way valve to pressurize the tennis ball to a desired bounce characteristic.
REFERENCES:
patent: 2453143 (1948-11-01), Lejeune
patent: 3428314 (1969-02-01), Haines et al.
patent: 3428315 (1969-02-01), Haines
patent: 4151029 (1979-04-01), Jones-Hinton
patent: 4240630 (1980-12-01), Hoffman
patent: 4248658 (1981-02-01), McGlashen
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patent: 4340222 (1982-07-01), Kerkenbush et al.
patent: 4568081 (1986-02-01), Martin
patent: 4765853 (1988-08-01), Hoffman
Aftergut Jeff H.
Ball Michael W.
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