US 7,278,908 B2 · Polishing disk for a tool for the fine machining of optically active surfaces on spectacle lenses in particular

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.

Claims13

Dependent claims

A polishing disk for a tool for the fine machining of optically active surfaces on lenses, the polishing disk comprising a support body, a foam layer attached to said support body, and a polishing film bearing against said foam layer, said polishing film being provided with at least one opening in a central region, wherein a cutout in the foam layer adjoins the at least one opening in the polishing film in the direction of the support body, and wherein the polishing film protrudes inwards beyond an outer periphery of the cutout in the foam layer.

A tool for the fine machining of optically active surfaces on lenses, comprising

a base body which can be fitted on a tool spindle of a machining machine,
an articulated part which has a receiving section guided such that it can be tilted and moved longitudinally with respect to the base body, said receiving section being adjoined in the direction of the base body by a bellows section, by means of which the articulated part is fixed to the base body such that it can rotate therewith,
a pressure medium chamber which is delimited by the base body and the articulated part and which can be acted upon by a pressure medium, and
a polishing disk which is held on the receiving section of the articulated part in a replaceable manner, said polishing disk comprising a support body, a foam layer attached to said support body, and a polishing film bearing against said foam layer, said polishing film being provided with at least one opening in a central region, wherein a cutout in the foam layer adjoins the at least one opening in the polishing film in the direction of the support body, and wherein the polishing film protrudes inwards beyond a outer periphery of the cutout in the foam layer.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

11/367,605Filed 3 Mar 2006

Priority

DE 10 2005 010 5834 Mar 2005

Published

US 2006/0199481 A17 Sep 2006

Granted

9 Oct 2007

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

B24B 13/012
Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools: conformable in shape to the optical surface, e.g. by fluid…
B24B 13/02
Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories…
Y10S 451/921
Abrading: pad for lens shaping tool
B24B
Machines, devices, or processes for grinding or polishing

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

Life of this patent

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

Life of this patent

Abstract

Claims13