US3583111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens grinding apparatus
Assignee: Individual
•
Filing: 1966-08-22
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Granted: 1971-06-08
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Expires: 1986-08-22
Abstract
Abstract A lens grinding disc of thin sheet material having spring quality, such as brass shim material, is provided with slits extending inwardly from its periphery to enable it to conform to a lens surface when applying a fine abrasive material thereto in a grinding or polishing operation. Other slits may extend radially outwardly also. The disc may be of metal, or synthetic resin, or of woven mesh material. A cushion of sponge rubber or the like may be provided between the disc and a holder used for manipulating it.
Inventors
- 👤 David Volk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:58
CPC Classifications
B; B24; B24D; B24D9/00; B24D9/08; B24B; B24B13/00; B24B13/01; Y; Y10; Y10S; Y10S451/00; Y10S451/921
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
Apparatus for applying a fine abrasive compound to a lens or mirror surface of continuously varying curvature in a smoothing operation between rough forming and polishing operations, comprising a smooth normally flat disc of flexible resilient sheet material having sufficient spring quality as not to bE permanently deformed during said smoothing operation, there being slits in said material providing ability to conform generally to a lens surface, at least some of said slits extending to the periphery of said disc and opening outwardly there, some of said slits extending across said disc in direction opposite to others of said slits and said oppositely extending slits overlapping each other, the edges of said slits providing edges of concentrated abrasive capability, and all portions of said disc being integral and providing abrasive applying surfaces.
Claim 2
Dependent Claim
132 words
Apparatus for applying a fine abrasive compound to a lens or mirror surface of continuously varying curvature in a smoothing operation between rough forming and polishing operations, comprising a smooth normally flat disc of flexible resilient sheet material having sufficient spring quality as not to bE permanently deformed during said smoothing operation, there being slits in said material providing ability to conform generally to a lens surface, at least some of said slits extending to the periphery of said disc and opening outwardly there, some of said slits extending across said disc in direction opposite to others of said slits and said oppositely extending slits overlapping each other, the edges of said slits providing edges of concentrated abrasive capability, and all portions of said disc being integral and providing abrasive applying surfaces.
Claim 3
Dependent Claim
23 words
Apparatus as in claim 1, wherein said disc is sheet metal approximately 0.002 inch to 0.015 inch thick and having leaf spring characteristics.
Claim 4
Dependent Claim
20 words
Apparatus as in claim 1, wherein said disc is a synthetic resin material having approximately the stiffness of cellulose acetate.
Claim 5
Dependent Claim
13 words
Apparatus as in claim 1, wherein said disc is of woven mesh material.
Claim 6
Dependent Claim
20 words
Apparatus as in claim 1, wherein said disc is of woven mesh material having at least 50 meshes per inch.
Claim 7
Dependent Claim
107 words
Apparatus for applying a fine abrasive compound to a lens or mirror surface of continuously varying curvature in a smoothing operation between rough forming and polishing operations, comprising a smooth disc of flexible resilient sheet material having sufficient spring quality as not to be permanently deformed during said smoothing operation, there being slits in said material providing ability to conform generally to a lens surface, the edges of said slits providing edges of concentrated abrasive capability, a cushion of resilient material on the side of said disc away from said lens or mirror surface, and all portions of said disc being integral and providing abrasive applying surfaces.
Claim 8
Dependent Claim
107 words
Apparatus for applying a fine abrasive compound to a lens or mirror surface of continuously varying curvature in a smoothing operation between rough forming and polishing operations, comprising a smooth disc of flexible resilient sheet material having sufficient spring quality as not to be permanently deformed during said smoothing operation, there being slits in said material providing ability to conform generally to a lens surface, the edges of said slits providing edges of concentrated abrasive capability, a cushion of resilient material on the side of said disc away from said lens or mirror surface, and all portions of said disc being integral and providing abrasive applying surfaces.
Claim 9
Dependent Claim
44 words
Apparatus as defined in claim 6 including a holder, the side of said cushion opposite said disc being secured to a surface of said holder, and said holder surface being substantially complementary to the surface of said lens or mirror contacted by said disc.
Claim 10
Dependent Claim
31 words
Apparatus as defined in claim 6 including a holder, the side of said cushion opposite said disc being secured to a surface of said holder, and said holder surface being flat.
Claim 11
Dependent Claim
53 words
Apparatus as defined in claim 6 wherein said cushion is approximately the same diameter as said disc, a holder on the side of said cushion opposite said disc, and said holder and cushion and disc attached to each other so as to be movable as a unit over said lens or mirror surface.
Claim 12
Dependent Claim
46 words
Apparatus as defined in claim 6 wherein said cushion is of a material having the compressibility of sponge rubber having a density of approximately 7 pounds per cubic foot and requiring approximately 2 1/2 to 6 pounds per square inch pressure to compress it 25 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |