Abrasion apparatus
US8550883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2011 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | Jan 28, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B9/146
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for machining a spectacle lens by abrasion of material in the area of a joining surface to be formed is provided. The apparatus comprises a tool provided with a cutting end face whose axis of rotation is movable in a forward direction relative to a holding device and covers a reference plane. The holding device comprises a support surface, a contact surface aligned perpendicularly thereto and a stop edge. The support surface and the contact surface extend perpendicularly to the reference plane and the stop edge extends perpendicularly to the support surface and in parallel to the reference plane and has a distance from the reference plane which is variable. The support surface is interrupted such that the projecting end face of the tool can be moved along the interruption. When provided at its machining position the lens rests on the support surface, contacts the contact surface and abuts with its edge against the stop edge. When the distance of the stop edge from the reference plane is adjusted to a value predetermined for the lens to be machined, the joining surface is formed by means of the tool exactly at the location of the joining surface predetermined for the le…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.