Non-sticking ply end turn-over bladder and method of manufacture thereof
US4381331A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 1982 |
| Grant date | Apr 26, 1983 |
| Priority date | — |
| Expiry date | Jan 11, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/3016
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The bladder has at least a portion of its outer surface comprising a fabric layer of cords partially embedded therein so that such cords project slightly above the rubber surface. The article is manufactured by calendering a fabric layer of cords on one side only with a coating of uncured and unvulcanized rubber, applying the layer to the bladder material with the rubber coated surface in contact therewith, and heating the article so formed to cure the rubber coating. The curing causes some of the rubber coating to flow between and over the outside surfaces of the cords. This excess rubber is removed by abrading the article so as to expose the cords. The abrading removes some of the cured rubber between the cords so that the cords project slightly above the surface of the rubber substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.