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:
Nov. 30, 1976
Filed:
Jan. 17, 1975
Applicant:
Inventors:
Orin W Coburn, Muskogee, OK (US);
Joe D Stith, Muskogee, OK (US);
Assignee:
Coburn Optical Industries, Inc., Muskogee, OK (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
5121 / ; 51277 ;
Abstract
Disclosed is a system for blocking an ophthalmic lens blank by means of a vacuum. The lens blank rests on the chuck and forms an air pocket or cavity therebetween which is evacuated by means of a vacuum pump. After evacuation, an elastic plug is inserted in an aperture in the chuck by atmospheric pressure to maintain the vacuum. The lens is disengaged from the chuck by peeling the plug back and thereby releasing the vacuum.