Apparatus for working the marginal zones of a lens
US3978620A · kind A · utility
11Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1975 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Jun 13, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B9/142
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A lens of a soft and readily damaged material is placed onto a support having a surface whose contour corresponds to the mating contour of the juxtaposed surface of the lens. The support is rotated and the lens is shifted on it until the lens is centered on the surface of the support, whereupon suction is applied through the support to the lens to hold it immovable as the marginal zones of the lens are being worked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.