Key top element, push button switch element and method for manufacturing same
US6196738A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Jul 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2229/054
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A key top element capable of being manufactured while permitting a design of a display section thereof to be readily modified and corrected, accommodating a variety of data for design formation, and capable of exhibiting increased design properties. The key top element includes a printed sheet constituted by a substrate sheet member, an on-demand printed layer and a white- or silver-colored layer, as well as transparent key top members fixedly bonded to the printed sheet. The on-demand printed layer is printed in the form of a symbol or the like on the substrate sheet member using an on-demand printing machine. A push button switch element is also disclosed which includes such a key top element and a light-permeable rubber cover base bonded to the key top element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.