US4248826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molded balata shell
Assignee: FRED H WEBER Co Inc
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Filing: 1979-08-30
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Granted: 1981-02-03
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Expires: 1999-08-30
Abstract
Abstract Improvements in a process for use in the manufacture of hemispherical shells for covering a golf ball center or core. The process includes the injection of a warm plasticized compound into a mold cavity in the form of a hemispherical shell. The improvements are that prior to plasticizing and injection into the mold cavity: the compound has as a dominant constituent, a trans 1,4-chain polymer of isoprene (balata, gutta-percha or synthetic transpolyisoprene); the compound is milled into a strip; and, the milled compound strips are granulated into particles.
Inventors
- 👤 Fred H. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:59
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/0001; A; A63; A63B; A63B37/00; A63B37/0003; A63B37/0023; A63B37/0024; A63B37/0025; A63B37/0026; A63B37/007; A63B37/0072; A63B37/0074; A63B45/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
121 words
In the process for the manufacture of the hemispherical shells for covering a golf ball core, each said shell being of a formulated compound having as the dominant constituent a trans 1,4-chain polymer of isoprene (balata, gutta-percha or synthetic transpolyisoprene), the improvement comprising the steps of: milling said formulated compound into a strip having the approximate dimensions of 4" to 30" wide and 1/8" to 1/4" thick; granulating said milled strip of compound into small cubes, with a minimum of impalpable powder of fines; and, injection molding said milled and granulated compound as a plasticized compound into a mold having one or more cool cavities in the form of said hemispherical shell, at a temperature which is maintained below 250° F.
Claim 2
Dependent Claim
121 words
In the process for the manufacture of the hemispherical shells for covering a golf ball core, each said shell being of a formulated compound having as the dominant constituent a trans 1,4-chain polymer of isoprene (balata, gutta-percha or synthetic transpolyisoprene), the improvement comprising the steps of: milling said formulated compound into a strip having the approximate dimensions of 4" to 30" wide and 1/8" to 1/4" thick; granulating said milled strip of compound into small cubes, with a minimum of impalpable powder of fines; and, injection molding said milled and granulated compound as a plasticized compound into a mold having one or more cool cavities in the form of said hemispherical shell, at a temperature which is maintained below 250° F.
Claim 3
Dependent Claim
19 words
An injection molded hemispherical shell for convering a golf ball core, manufactured according to the process of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |