Method of manufacturing contact rubber structure
US4464326A · kind A · utility
11Cited by
10References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Sep 24, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2229/046
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a method of manufacturing a contact rubber structure, colored, hard, non-vulcanized rubber materials are injected into cavities of a mold for molding key top portions. A mold for molding key sheet portions is placed over the key top portions formed by the foregoing molding step. A non-vulcanized rubber material which is softer than the material of each key top portion is charged, compressed and heated, so that the key sheet portions are made to be integral with the key top portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.