Polishing disk for a tool for the fine machining of optically active surfaces on spectacle lenses in particular

US7278908B2 · kind B2 · utility

Assignee

• Satisloh AG · CH

Inventors

• Lothar Urban · Solms, DE
• Peter Philipps · Mengerskirchen, DE

Key dates

• Filing date: Mar 3, 2006
• Grant date: Oct 9, 2007
• Expiry date: Mar 3, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S451/921
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A polishing disk for a tool for the fine machining of optically active surfaces on spectacle lenses in particular is disclosed, which comprises a support body, to which a foam layer is attached, wherein a polishing film bears against the foam layer. The polishing film is provided with at least one opening in a central region. During machining, the opening ensures pressure equalization and makes liquid polishing agent available from inside the foam layer, as a result of which better rinsing and cooling of otherwise disadvantaged regions of the polishing disk is achieved. As a result, a polishing disk of simple and cost-effective design is proposed, which is much more durable than the prior art while achieving high surface qualities.