US4573903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical component molding apparatus for following the differential shrinkage of molded synthetic material
Assignee: EssilorLuxottica SA
•
Filing: 1983-07-15
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Granted: 1986-03-04
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Expires: 2003-07-15
Abstract
Abstract A device suitable for molding ophthalmic lenses comprises two spaced mold parts in face-to-face relationship inside a cylindrical sleeve. One or both parts comprise a rigid supporting base, a molding die of an elastically deformable material and an intermediate pad of an incompressible elastic material disposed between the base and the die and completely covering their respective surfaces.
Inventors
- 👤 Jean Boudet
- 👤 Guy Rolland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:49
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00413; B29C; B29C39/00; B29C39/003; B29C39/006; B29C43/00; B29C43/32; B29C43/54; B29C33/00; B29C33/38; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
115 words
A device suitable for molding synthetic molding material into optical components, said device comprising two spaced mold parts disposed in face-to-face relationship and defining a mold cavity for an optical component; at least one of said mold parts including a rigid supporting base, a molding die elastically deformable in the course of molding a component, and an intermediate pad of an incompressible elastic material disposed between said base and said molding die and completely covering the respective surfaces thereof; said pad being of a thickness and elasticity to form means for effecting movement of said molding die to follow differential shrinkage of molded synthetic material in the course of setting of said molded synthetic material.
Claim 2
Independent Claim
115 words
A device suitable for molding synthetic molding material into optical components, said device comprising two spaced mold parts disposed in face-to-face relationship and defining a mold cavity for an optical component; at least one of said mold parts including a rigid supporting base, a molding die elastically deformable in the course of molding a component, and an intermediate pad of an incompressible elastic material disposed between said base and said molding die and completely covering the respective surfaces thereof; said pad being of a thickness and elasticity to form means for effecting movement of said molding die to follow differential shrinkage of molded synthetic material in the course of setting of said molded synthetic material.
Claim 3
Dependent Claim
24 words
A device according to claim 1, wherein said pad is of the same thickness at all points between said base and said molding die.
Claim 4
Dependent Claim
23 words
A device according to claim 1, wherein said pad is selectively attached to at least one of said base and said molding die.
Claim 5
Dependent Claim
23 words
A device according to claim 1, wherein said pad is selectively bonded to at least one of said base and said molding die.
Claim 6
Dependent Claim
32 words
A device according to claim 1, further comprising a cylindrical sleeve surrounding said mold parts with three being an annular clearance between said cylindrical sleeve and said molding die and said pad.
Claim 7
Dependent Claim
22 words
A device according to claim 5, wherein there is also annular clearance between said sleeve and at least part of said base.
Claim 8
Dependent Claim
15 words
A device according to claim 1, wherein said molding die is formed of tempered glass.
Claim 9
Dependent Claim
22 words
A device according to claim 1 wherein said one mold part has relatively less curvature than the other of said mold parts.
Claim 10
Dependent Claim
36 words
A device according to claim 1, wherein the other of said mold parts also has a base, a molding die and a pad similar to said base, molding die and pad of said one mold part.
Claim 11
Dependent Claim
13 words
A device according to claim 9, wherein said molding dies are both thin-walled.
Claim 12
Dependent Claim
16 words
A device according to claim 10, wherein said molding dies are of substantially constant thickness throughout.
Claim 13
Dependent Claim
19 words
A device according to claim 9, wherein said molding dies each has a thickness of less than 10 mm.
Claim 14
Dependent Claim
16 words
A device according to claim 9, wherein said molding dies are of substantially constant thickness throughout.
Claim 15
Dependent Claim
33 words
A device according to claim 9, further comprising a cylindrical sleeve surrounding said mold parts with there being an annular clearance between said sleeve and each of said molding dies and said pads.
Claim 16
Dependent Claim
25 words
A device according to claim 14, wherein there is also annular clearance between said cylindrical sleeve and at least part of each of said bases.
Claim 17
Dependent Claim
12 words
A device according to claim 1, wherein said molding die is thin-walled.
Claim 18
Dependent Claim
16 words
A device according to claim 16, wherein said molding die is of substantially constant thickness throughout.
Claim 19
Dependent Claim
19 words
A device according to claim 1, wherein said molding die has a wall thickness of less than 10 mm.
Claim 20
Dependent Claim
16 words
A device according to claim 1 wherein said molding die is of substantially constant thickness throughout.
Claim 21
Dependent Claim
29 words
A device according to claim 1 wherein said molding die is thin-walled, of a substantially constant thickness throughout, and of a thickness less than the thickness of said pad.
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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) | 1989-03-03 | 1989-09-02 | 1990-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-03 | 1993-09-02 | 1994-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-03 | 1997-09-02 | 1998-03-04 | $7700.00 | Window Closed / Lapsed |