Base element for a wristwatch
US4657408A · kind A · utility
0Cited by
9References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1983 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Jan 13, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B29/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a base element for a wristwatch in the form of a laminate, which simultaneously serves the purpose of a movement plate or frame and a case back and which consists of two integrally joined plates, these plates being bonded together in particular by means of a foil using ultrasonic heat-sealing. Such a base element may be manufactured with high precision simply and cheaply and has good stability, especially when a circular edge is folded to the inside of one of the plates of the base element for the purpose of reinforcement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.