US4038014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens mold
Assignee: American Optical Corp
•
Filing: 1976-09-24
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Granted: 1977-07-26
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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 11:34
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.
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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) | 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 |