Polishing tool with several pressure zones

US7217176B2 · kind B2 · utility

Assignee

• Schneider GmbH & Co. KG · DE

Inventors

• Gunter Schneider · Marburg, DE
• Helwig Buchenauer · Steffenberg, DE
• Ulf Börner · Marburg, DE
• Klaus Krämer · Baudenbach, DE

Key dates

• Filing date: Oct 20, 2005
• Grant date: May 15, 2007
• Expiry date: Oct 20, 2025

Classification

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

Abstract

The invention refers to a polishing tool for optical lenses with at least one polishing pad adaptable at least partially to the shape of a lens surface of said lenses and drivable by means of a drive shaft, said polishing pad having a membrane, wherein said polishing pad can transmit a bearing force of said membrane at least in an orthogonal direction relative to a lens surface. Moreover, the polishing tool comprises a reinforcing member connectable to said membrane, said reinforcing member being dimensionally stable in a parallel direction relative to a surface of said membrane and being flexible and/or pliable in an orthogonal direction relative to the surface of said membrane, wherein at least one pressure pad with a pressure membrane is arranged within said polishing pad, wherein said pressure membrane can be made to bear and/or can be prestressed against said membrane or said reinforcing member in an indirect or in a direct manner.