Blocking system for prescription lenses
US5462475A · kind A · utility
17Cited by
15References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 1993 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Feb 12, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An adhesive blocking system, for generating and for fining and polishing eyeglass lenses, utilizes a collar which slides over and engages a lens block, which lens block is secured to a lens blank by a relatively thick adhesive pad, to uniformly transfer pressure from the cylinder machine to the lens blank without deforming the adhesive pad, which deformation adversely affects the optics. In this manner, a lens blank is blocked only once for both generating and fining and polishing. In addition, the environmental risks and heating effects of current solder blocking systems are avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.