Patent US4425911A successfully refreshed from Google Patents.
US3894710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold forms coating synthetic resin lenses
Assignee: Individual
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Filing: 1973-08-29
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Granted: 1975-07-15
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Expires: 1993-08-29
Abstract
Abstract A method of forming thin wall molds of thermoplastic or thermosetting plastic resin, pressing optical surfaces on the inner walls of said thin wall molds in situ in presses, applying electronic high frequency or ultrasonic energy to soften the mold walls within the press between optically ground and polished dies, cooling said mold walls in situ under pressure in contact with said dies, forming hermetically sealed mold envelopes of said pressings except for a filler canal, filling the mold envelope with polymerizable monomers through said filler canal sealing the filler canal and curing the filled mold envelope to produce an optical lens.
Inventors
- 👤 George M J Sarofeen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/0038; B29D; B29D11/00; B29D11/00009; B29D11/00432; B29L; B29L2031/00; B29L2031/76; B29L2031/7602; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
55 words
A mold envelope for casting hard resin castings from polymerizable monomers therein, comprising a one-piece mold form, the inner configuration of which is adapted to form a molding cavity in the form and shape of the casting desired to be cast, said mold form having an outer skin of relatively thin formed, sheet-like thermoplastic material.
Claim 2
Dependent Claim
55 words
A mold envelope for casting hard resin castings from polymerizable monomers therein, comprising a one-piece mold form, the inner configuration of which is adapted to form a molding cavity in the form and shape of the casting desired to be cast, said mold form having an outer skin of relatively thin formed, sheet-like thermoplastic material.
Claim 3
Dependent Claim
53 words
A mold envelope according to claim 1 wherein said form includes a first half and a second half adapted to form and shape a casting therebetween, alignment nubs being provided on one of said halves and detents being provided on the other of said halves to insure axial alignment of the mold halves.
Claim 4
Dependent Claim
47 words
A mold according to claim 1 wherein said form comprises a first half and a second half, said halves being sealed substantially completely about their periphery and a filler canal extending from the sealed halves and opening into an internal molding cavity formed by said sealed halves.
Claim 5
Dependent Claim
17 words
A mold according to claim 1 wherein said mold form includes means for aligning opposite-facing casting surfaces.
Claim 6
Dependent Claim
20 words
A mold according to claim 1 wherein said mold form includes two halves and an alignment hinge joining said halves.
Claim 7
Dependent Claim
49 words
A mold according to claim 1 including a first obverse internal casting surface and a second reverse casting surface, said surfaces being Finished to form optical curves and surfaces on the casting and means for axially aligning said casting surfaces to form the molding cavity for casting a lens.
Claim 8
Dependent Claim
22 words
A mold according to claim 6 wherein said thermoplastic material is a polyvinyl chloride, polyethylene, polycarbonate, nylon, teflon, acrylic, acetate or A.B.S.
Claim 9
Dependent Claim
48 words
A MOLD ENVELOPE FOR CASTING LENSES COMPRISING A MOLD FORM OF ONE-PIECE CONSTRUCTION, AN INOLUDED CAVITY WITHIN SAID MOLD WHEREIN A LENS MAY BE CAST BY POLYMERIZATION OF MONOMERIC MATERIALS, AT LEAST A PORTION OF THE INNER WALL AREA OF SAID INCLUDED CAVITY BEING FORMED TO OPTICAL CHARACTERISTICS.
Claim 10
Dependent Claim
48 words
A MOLD ENVELOPE FOR CASTING LENSES COMPRISING A MOLD FORM OF ONE-PIECE CONSTRUCTION, AN INOLUDED CAVITY WITHIN SAID MOLD WHEREIN A LENS MAY BE CAST BY POLYMERIZATION OF MONOMERIC MATERIALS, AT LEAST A PORTION OF THE INNER WALL AREA OF SAID INCLUDED CAVITY BEING FORMED TO OPTICAL CHARACTERISTICS.
Claim 11
Dependent Claim
25 words
A mold as set forth in claim 8 having a filler opening extending from the included cavity for introducing liquid monomers into said included cavity.
Claim 12
Dependent Claim
17 words
A mold set forth in claim 8 having fused portions whereby said included cavity is sealed hermetically.
Claim 13
Dependent Claim
19 words
A mold as set forth in claim 1 wherein the walls forming said cavity are of substantially uniform thickness.
Claim 14
Dependent Claim
23 words
A mold as set forth in claim 8 having a plurality of optically prepared surfaces on the inner walls of said included cavity.
Claim 15
Dependent Claim
34 words
A mold as set forth in claim 8 having optical surfaces pressed onto the walls of said included cavity in complementary relationship whereby a lens may be formed by polymerizing a monomeric material therebetween.
Claim 16
Dependent Claim
21 words
A mold as set forth in claim 13 including means for axially aligning the complementary optical surfaces of the mold form.
Claim 17
Dependent Claim
36 words
A mold as in claim 8 wherein at least a portion of the inner walls of the included cavity are formed with heat induced in the mold wall material by the application of high frequency energy.
Claim 18
Dependent Claim
35 words
A mold as in claim 1 wherein at least a portion of the inner walls of the included cavity are formed with heat induced in the mold wall material by the application of ultrasonic energy.
Claim 19
Dependent Claim
10 words
A mold as in claim 1 formed of thermoplastic material.
Claim 20
Dependent Claim
32 words
A mold as in claim 1 formed of thermoplastic material having rigid properties at room temperature and selected from the group comprising polyvinyl chloride, polyethylene, polycarbonate, nylon, teflon, acrylic, acetate and A.B.S.
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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |