GB655448A - Manufacture of cricket or hockey balls - Google Patents
Manufacture of cricket or hockey ballsInfo
- Publication number
- GB655448A GB655448A GB3076648A GB3076648A GB655448A GB 655448 A GB655448 A GB 655448A GB 3076648 A GB3076648 A GB 3076648A GB 3076648 A GB3076648 A GB 3076648A GB 655448 A GB655448 A GB 655448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- mix
- vulcanizing
- guttapercha
- moulded
- 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
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
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0042—Producing plain balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/54—Balls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
A method of manufacturing a core for a cricket or hockey ball comprises preparing a homogeneous rubber mix containing vulcanizing agents and fillers and a chemical substance such as ammonium carbonate or sodium bicarbonate which, under heat, is readily decomposable and gas-evolving, moulding the mix in a fluid-tight mould completely filled and closed and subjecting the closed mould to the heat and pressure necessary for vulcanization of the mix so as to produce a core which, to the naked eye, is free from porosity and from gaseous cells and inclusions. The vulcanized core is then coated with a rubber solvent and has moulded thereon a cover of guttapercha and leather shreds. Alternatively the core mix is moulded, coated with solvent and covered and the complete ball vulcanized together. Before vulcanizing, the core may have guttapercha chips impressed therein, which, on vulcanizing, produce a film of guttapercha on the core to promote bonding of the core and cover. Suitable mixes and vulcanizing data are described in the Specification. Specifications 221,708, [Class 132 (ii)], 453,185 and 638,913 are referred to. Reference has been directed by the Comptroller to Specification 638,913.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3076648A GB655448A (en) | 1948-11-26 | 1948-11-26 | Manufacture of cricket or hockey balls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3076648A GB655448A (en) | 1948-11-26 | 1948-11-26 | Manufacture of cricket or hockey balls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB655448A true GB655448A (en) | 1951-07-18 |
Family
ID=10312804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3076648A Expired GB655448A (en) | 1948-11-26 | 1948-11-26 | Manufacture of cricket or hockey balls |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB655448A (en) |
-
1948
- 1948-11-26 GB GB3076648A patent/GB655448A/en not_active Expired
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