Patent US4819461A successfully refreshed from Google Patents.
Patent US4291508A successfully refreshed from Google Patents.
US4291508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens surfacing pad
Assignee: Sola International Inc
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Filing: 1979-11-30
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Granted: 1981-09-29
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Expires: 1999-11-30
Abstract
Abstract A cutaway pad for surfacing lenses with grinding or polishing slurries which flow into and along the cuts for distribution across a lens surface worked thereover. The heretofore pad floppiness is relieved with a continuous film backing which is readily conformable to a surfacing tool face and affords large area contact to prevent pad slippage during lens surfacing.
Inventors
- 👤 Louis Prunier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:03
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/02; B24B; B24B13/00; B24B13/01; B24D11/008
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
A lens surfacing pad comprising: a unitary cutaway main surfacing pad component having multiple interconnected pad sections with channelling therebetween for the distribution of abrasive slurries over the component during use of said pad; and a permanent thin and flexible supporting film to which said component is affixed for rendering said pad freely conformable to a lens surfacing tool of a surfacing machine without appreciable disruption of relative orientation of said pad sections, said film being continuous across said channels and securable to said surfacing tool.
Claim 2
Dependent Claim
86 words
A lens surfacing pad comprising: a unitary cutaway main surfacing pad component having multiple interconnected pad sections with channelling therebetween for the distribution of abrasive slurries over the component during use of said pad; and a permanent thin and flexible supporting film to which said component is affixed for rendering said pad freely conformable to a lens surfacing tool of a surfacing machine without appreciable disruption of relative orientation of said pad sections, said film being continuous across said channels and securable to said surfacing tool.
Claim 3
Dependent Claim
23 words
A lens surfacing pad according to claim 1 including a backing on said film for securing said pad to said lens surfacing tool.
Claim 4
Dependent Claim
14 words
A lens surfacing pad according to claim 2 wherein said backing comprises an adhesive.
Claim 5
Dependent Claim
14 words
A lens surfacing pad according to claim 3 wherein said adhesive is pressure sensitive.
Claim 6
Dependent Claim
21 words
A lens surfacing pad according to claim 1 wherein said unitary pad component is fixed to said film with an adhesive.
Claim 7
Dependent Claim
17 words
A lens surfacing pad according to claim 1 wherein said unitary pad component is formed of felt.
Claim 8
Dependent Claim
18 words
A lens surfacing pad according to claim 1 wherein said unitary pad component is formed of a fabric.
Claim 9
Dependent Claim
15 words
A lens surfacing pad according to claim 1 wherein said unitary pad component is flocked.
Claim 10
Dependent Claim
23 words
A lens surfacing pad according to claim 1 wherein at least some of said channels extend to the very edge said pad component.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |