US4038014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens mold
Assignee: American Optical Corp
•
Filing: 1976-09-24
•
Granted: 1977-07-26
•
Expires: 1996-09-24
Abstract
Abstract A mold for forming lens blanks to meniscus shapes under applied heat and a force created by partial vacuum. A cupped lens shaping surface in the mold is cushioned and covered with a synthetic fabric for effecting exceptional accuracy in lens blank conformance to shaping surface curvature, optimum surface smoothness and quick release upon completion of a forming cycle.
Inventors
- 👤 Robert J. Dusza
- 👤 Joseph W. Kantorski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:49
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/3642; B29C51/00; B29C51/26; B29C51/28; B29C51/30; B29C51/36; B29D; B29D11/00; B29D11/00009; B29D11/0073; B29C2043/3649; B29C2043/3655; B29C43/02; B29C43/10; B29C43/12; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A lens shaping mold of rigid base material having a lens blank receiving cavity of concave surface curvature substantially corresponding to a shape desired to be imparted to at least one surface of a lens placed in said cavity and urged against said cavity surface wherein the improvement comprises; a cushion of uniform thickness extended over at least the major portion of said concave surface of said cavity, said cushion being adhered to said cavity surface; and a covering of synthetic open texture fabric extended over and adhered to said cushion.
Claim 2
Dependent Claim
91 words
A lens shaping mold of rigid base material having a lens blank receiving cavity of concave surface curvature substantially corresponding to a shape desired to be imparted to at least one surface of a lens placed in said cavity and urged against said cavity surface wherein the improvement comprises; a cushion of uniform thickness extended over at least the major portion of said concave surface of said cavity, said cushion being adhered to said cavity surface; and a covering of synthetic open texture fabric extended over and adhered to said cushion.
Claim 3
Dependent Claim
15 words
A mold according to claim 1 wherein said fabric is formed of a polyester monofilment.
Claim 4
Dependent Claim
15 words
A mold according to claim 1 wherein said fabric open texture is approximately 330 mesh.
Claim 5
Dependent Claim
15 words
A mold according to claim 2 wherein said fabric open texture is approximately 330 mesh.
Claim 6
Dependent Claim
21 words
A mold according to claim 1 wherein said cushion is formed of silicone rubber and is vulcanized to said cavity surface.
Claim 7
Dependent Claim
24 words
A mold according to claim 5 wherein said open textured fabric is adhered to said cushion with a room temperature vulcanizing silicone rubber adhesive.
Claim 8
Dependent Claim
20 words
A mold according to claim 1 wherein a portion of said cushion is extended over edges of said fabric covering.
Claim 9
Dependent Claim
20 words
A mold according to claim 7 wherein said edges of said fabric is imbedded in the material of said cushion.
Claim 10
Dependent Claim
26 words
A mold according to claim 1 further including a passageway communicating with said cavity for evacuating air and gases therefrom during a lens blank shaping operation.
Claim 11
Dependent Claim
33 words
A mold according to claim 9 still further including a removable top rubber member adapted to cover said lens blank receiving cavity when placed thereover for facilitating evacuation of air and gases therefrom.
References Cited (Backward Citations)
US2441097A
Cited
US3004295A
Cited
US3072961A
Cited
US3061881A
Cited
US3290418A
Cited
US3422495A
Cited
US3315313A
Cited
US3353219A
Cited
US3897530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |