Disposable lap blank
US5349787A · kind A · utility
3Cited by
6References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1993 |
| Grant date | Sep 27, 1994 |
| Priority date | — |
| Expiry date | Sep 23, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T279/21
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A lap blank and holder assembly includes a lap blank having two spaced apart flat surfaces separated by a given thickness and formed from a material capable of compressing about a member inserted into it. The holder has a projection extending outwardly from a front face thereof and is inserted into the material making up the lap to secure it against rotational and shifting movement while being cut in a surfacing machine. This arrangement further allows the assembly to be placed as an assembly in a finishing machine for subsequent polishing of a cut lens surface in an off-axis polishing procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.