US4229911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision blocking of semi-finished lens blanks
Assignee: Individual
•
Filing: 1978-04-03
•
Granted: 1980-10-28
•
Expires: 1998-04-03
Abstract
Abstract Method and apparatus for the precision blocking of semi-finished 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.
Inventors
- 👤 Bela J. Bicskei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
34 words
The method of blocking a lens blank with a prescribed optical condition comprising the steps of: (a) manually positioning a lens blank in an instrument until the prescribed optical condition has been satisfied; and
Claim 2
Independent Claim
34 words
The method of blocking a lens blank with a prescribed optical condition comprising the steps of: (a) manually positioning a lens blank in an instrument until the prescribed optical condition has been satisfied; and
Claim 3
Dependent Claim
43 words
(b) affixing a block to said lens blank without moving it from its adjustment position using a plunger mechanism to bring a releasable block bearing a double-faced adhesive strip into contact with the lens blank to adhesively secure the block to the blank.
Claim 4
Dependent Claim
43 words
(b) affixing a block to said lens blank without moving it from its adjustment position using a plunger mechanism to bring a releasable block bearing a double-faced adhesive strip into contact with the lens blank to adhesively secure the block to the blank.
Claim 5
Dependent Claim
35 words
The method of claim 1 wherein said lens blank includes a bifocal segment; said bifocal segment is centered on said instrument; and the adjustment is continued to decenter said bifocal segment by a prescribed amount.
Claim 6
Dependent Claim
22 words
The method of claim 1 wherein said instrument includes targets which are projected through said lens blank on a ground glass screen.
Claim 7
Dependent Claim
24 words
The method of claim 3 wherein said instrument includes a mirror to permit an operator to view the projected targets and said lens blank.
Claim 8
Dependent Claim
15 words
The method of claim 2 wherein said instrument includes support pins for said lens blank.
Claim 9
Dependent Claim
19 words
The method of claim 1 wherein said instrument is used to apply a preformed block to said lens blank.
References Cited (Backward Citations)
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Cited
US3049766A
Cited
US3507076A
Cited
US3451177A
Cited
US3861089A
Cited
US4077722A
Cited
US4138085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |