The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1992
Filed:
Mar. 01, 1991
Mark D Wagner, Charlottesville, VA (US);
National Optronics, Inc., Charlottesville, VA (US);
Abstract
The preferred embodiment is directed to a lens shaper and finisher which can readily accommodate large sized lens blanks. The preferred embodiment includes a chuck for supporting a lens blank and a lens pattern. A cutter is operably associated with the chuck. A plurality of piston and cylinder assemblies displace the chuck relative to the cutter between a first position wherein the lens blank is removed from the cutter and a second position wherein the lens blank engages the cutter. A control device is operably connected to a least one of the piston and cylinder assemblies to vary the rate at which the lens blank is fed to the cutter. Accordingly, the feed rate may be readily adjusted such that during a rough cutting cycle a lens blank is fed at a slower rate than during a finish cutting cycle to reduce the likelihood of shattering of the lens blank during the cutting process.