Golf Ball
US5733206A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1995 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Oct 31, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/0075
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The present invention is directed to improved molded golf ball core constructions and methods for improving the molded golf ball core construction. The molded golf ball comprises a molded spherical core having a soft skin integral therewith, and a cover molded over the core. The soft skin is formed by controlling exothermic molding temperatures. A slug is placed in a mold cavity which is then closed. A steam set point is set, and steam is applied for a 25-30 minute period such that a maximum mold temperature exceeds the steam set point. In the alternative, the core surface may be softened by first immersing a slug in water prior to subjecting the slug to conventional molding conditions. The resulting golf ball comprises a spherical molded core including a central portion having a hardness in a range of about 50-90 Shore C and a surface portion having a hardness in a range of about 50-70 Shore C, the surface portion integral with the central portion and comprising the radially outermost 1/32 inch to 1/4 inch of the spherical core; and a cover molded over the spherical molded core.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.