US4227349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision blocking of lens blank
Assignee: Individual
•
Filing: 1978-10-31
•
Granted: 1980-10-14
•
Expires: 1998-10-31
Abstract
Abstract Method and apparatus 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.
Inventors
- 👤 Bela J. Bicskei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:34
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
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 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 bearing a double-faced adhesive strip into contact with the lens blank to adhesively secure the block to the blank.
Claim 2
Independent Claim
88 words
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 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 bearing a double-faced adhesive strip into contact with the lens blank to adhesively secure the block to the blank.
Claim 3
Dependent Claim
35 words
The method of claim 1 wherein said lens blank includes a bifocal setment: said bifocal segment is centered on said instrument; and the adjustment is continued to decenter said bifocal segment by a prescribed amount.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein a block is affixed to said lens blank at the position where said member overlies said lens blank.
Claim 5
Dependent Claim
21 words
The method of claim 3 wherein said member is pivotally elevated and depressed to apply said block to said lens blank.
Claim 6
Dependent Claim
15 words
The method of claim 2 wherein said instrument includes support pins for said lens blank.
References Cited (Backward Citations)
US2712180A
Cited
US3049766A
Cited
US3507076A
Cited
US3368285A
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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |