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US 5,194,191 AGranted
Preparation of thread-wound golf balls
AssigneeBridgestone Corporation
InventorsJun Nomura, Jumei Harada
Life of this patent
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Abstract
Thread--wound golf balls are prepared by winding a rubber thread around a frozen core to form a core ball, immediately thereafter microwave heating the core ball to thaw the core, and forming a cover over the core ball. Microwave heating causes the frozen core to be briefly thawed without heating the thread rubber layer and without moisture condensation on the core ball surface, reducing the time taken for the core thawing step and eliminating the need for a drying step.
Claims4
A method for preparing a thread-wound golf ball, comprising the steps of:
- continuously winding a length of rubber thread around a frozen core to form a core ball;
- immediately after formation of the core ball, causing the core ball to thaw by exposing the core ball to microwave radiation for heat thawing, thus eliminating the possibility of moisture condensation on the core ball, the core being thawed without substantial heating of the rubber thread;
- and
- enclosing the core ball in a cover.
1 more element
Dependencies are inferred from the claim text.