GB234927A - Improvements in tennis balls and similar balls having a gas content and in the manufacture thereof - Google Patents
Improvements in tennis balls and similar balls having a gas content and in the manufacture thereofInfo
- Publication number
- GB234927A GB234927A GB648624A GB648624A GB234927A GB 234927 A GB234927 A GB 234927A GB 648624 A GB648624 A GB 648624A GB 648624 A GB648624 A GB 648624A GB 234927 A GB234927 A GB 234927A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- balata
- rubber
- balls
- gas content
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- 240000002636 Manilkara bidentata Species 0.000 abstract 5
- 235000016302 balata Nutrition 0.000 abstract 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract 4
- 239000000463 material Substances 0.000 abstract 4
- 229920001971 elastomer Polymers 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 2
- 239000005864 Sulphur Substances 0.000 abstract 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 abstract 2
- 239000011787 zinc oxide Substances 0.000 abstract 2
- 244000286663 Ficus elastica Species 0.000 abstract 1
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 abstract 1
- 241000269799 Perca fluviatilis Species 0.000 abstract 1
- 235000019270 ammonium chloride Nutrition 0.000 abstract 1
- 229920001195 polyisoprene Polymers 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 235000010288 sodium nitrite Nutrition 0.000 abstract 1
- 238000004073 vulcanization Methods 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/04—Spherical articles, e.g. balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
234,927. Dunlop Rubber Co., Ltd., and Penfold, A. E. March 13, 1934. Balls. - The inner core of a tennis or like ball having a gas content, is composed of two or more parts of non-porous material such as gutta perch and / or balata, the parts being joined and sealed with gastight joints. A preferred mixing for the material of the core has the following percentage composition by weight :-purined balata 25; washed balata 15; smoked sheet rubber 30; sulphur 10; zinc oxide 20. The material is formed into hemispherical cups B which are joined together and the joint sealed by means of a band e of the same material. The band e may be formed integral with one of the cups or may be applied separately. The core is covered by a layer of soft rubber c and is then vulcanized. The core may be inflated through the usual plug, or in the case of a plugless ball, by means of a mixture of sodium nitrite and ammonium chloride. The usual felt cover A is finally applied. According to the Provisional Specification the material of the core may have the following percentage composition by weight : deresinated balata, 15; balata 25; india-rubber 30; zinc oxide 20; sulphur 10. As a result of vulcanization the core loses its semi-rigidity, and becomes resilient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB648624A GB234927A (en) | 1924-03-13 | 1924-03-13 | Improvements in tennis balls and similar balls having a gas content and in the manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB648624A GB234927A (en) | 1924-03-13 | 1924-03-13 | Improvements in tennis balls and similar balls having a gas content and in the manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB234927A true GB234927A (en) | 1925-06-11 |
Family
ID=9815371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB648624A Expired GB234927A (en) | 1924-03-13 | 1924-03-13 | Improvements in tennis balls and similar balls having a gas content and in the manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB234927A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008077354A2 (en) * | 2006-02-09 | 2008-07-03 | Francisco Pacheco | Curve ball with magnus effect |
-
1924
- 1924-03-13 GB GB648624A patent/GB234927A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008077354A2 (en) * | 2006-02-09 | 2008-07-03 | Francisco Pacheco | Curve ball with magnus effect |
| WO2008077354A3 (en) * | 2006-02-09 | 2008-10-16 | Francisco Pacheco | Curve ball with magnus effect |
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