Device for parallex-free centering of a blank for a glass lens for spectacles and for providing markings and/or attaching a holder before inserting the blank into a grinding machine for blanks for glass lenses
US5498200A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Aug 12, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B13/0055
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A device for parallax-free centering of an eyeglass lens blank and for application of markings and optionally a holder before insertion of the eyeglass lens blank into an eyeglass edge grinding machine has a stage for the eyeglass lens blank. An electric drive is connected to the stage which is moveable in an upward and downward direction by the electric drive. A depressor for holding the eyeglass lens blank on the stage is provided. The depressor allows for lateral movement of the eyeglass lens blank in a support plane of the stage. The depressor is moveable in the upward and downward direction. A first proximity detector is operatively connected with the electric drive and with the depressor for positioning at a predetermined height the eyeglass lens blank held between depressor and stage. A light divider is positioned between the eyeglass lens blank and the eye of an operator of the device for superimposing a scale; and a template image or an eyeglass frame opening image onto the image of the eyeglass lens blank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.