Method of manufacture of identical parts displaying different indicia
US4307047A · kind A · utility
20Cited by
10References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1980 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Aug 18, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2009/187
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing parts which are otherwise identical but which display different indicia such as a typewriter or the like keys which comprises the steps of injection molding a plurality of identical parts of a plastic having a filler material capable of undergoing a color change, and thereafter exposing individually the identical parts to a radiation source for changing the color of localized portions of the part to display the indicia while retaining the molded color of remaining portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.