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US 4,288,946 AGranted
Precision blocking of lens blanks
OwnerBela J. Bicskeiinventor
Life of this patent
Estimating the term…
Abstract
Method for the precision blocking of lens blanks by the adjustment of each such blank until it occupies a prescribed position where an alloy hub or "block" is removably affixed to the blank so that it can be properly gripped for finishing.
Claims5
The method of blocking a lens blank at a prescribed optical position comprising the steps of:
- (a) adjusting a lens blank in an instrument until said lens blank satisfies a prescribed optical condition;
- and
- (b) pivoting a pivotable member of said instrument from the side thereof to said lens blank without disturbing the position of said lens blank;
- and
- (c) using a plunger mechanism of said pivotable member to bring a releasable block and a double-faced adhesive strip into contact with the lens blank to adhesively secure the block to the blank.
2 more elements
Dependencies are inferred from the claim text.