Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
2005-01-04
2005-01-04
Colaianni, Michael P. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C264S148000, C264S161000, C264S248000, C264S250000, C264S271100, C264S279000, C264S279100, C425S420000, C425S451200, C425S813000, C473S371000, C473S373000, C473S374000, C473S375000, C473S376000, C473S377000
Reexamination Certificate
active
06838036
ABSTRACT:
A golf ball1has a core2and a cover3. For molding a core2, a rubber composition is extruded from a kneading machine, and cut at a predetermined length to obtain a preforming material. The preforming material is placed in a mold and the mold is clamped. An upper portion and lower portion of the mold mate for more than or equal to 15 seconds, and thereafter they are unclamped until a clearance between the upper and lower portions becomes from 3 mm to 8 mm, then, the mold is shut. The shutting time is determined to be from 0.5 second to 5.0 seconds. By this unclamping of the mold, a residual air in a spherical cavity is released, which results in elimination of defective products.
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Birch & Stewart Kolasch & Birch, LLP
Colaianni Michael P.
Poe Michael I.
Sumitomo Rubber Industries Ltd.
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