Patent US4234533A successfully refreshed from Google Patents.
US4234533A
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Method of bonding spaced sheets by molding resin therebetween
Assignee: LANGLANDS JAMES WALLACE 18 GLENCRAIG TERRACE FENWICK BY KILMARNOCK AYRSHIRE
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Filing: 1979-04-16
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Granted: 1980-11-18
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Expires: 1999-04-16
Abstract
Abstract A method of producing a bonded laminate by sealing round the edges of a pair of face-to-face spaced sheets of frangible material, introducing into the envelope so formed a liquid resin composition and solidifying the liquid, the seal around the sheets being formed by gas-permeable, resin-impermeable material so that when the resin is introduced the sheets can be sealed completely and trapped air can escape through the seal. This permits very precise control of the amount of resin in the laminate and avoids difficulties involved in the removal of air bubbles.
Inventors
- 👤 James W. Langlands
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:48
CPC Classifications
B; B32; B32B; B32B37/00; B32B37/14; B32B37/24; B29; B29C; B29C37/00; B29C37/006; B29C39/00; B29C39/02; B29C39/12; B29C39/123; B29C39/126; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10688; B32B17/10807; B32B17/10899; B32B17/10908; B32B17/10917; B32B7/00; B32B7/04; B32B7/12; B29K; B29K2709/00; B29K2709/08; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A method of producing a laminate comprising placing a pair of sheets of frangible material in face-to-face relationship, introducing between the sheets a liquid which on solidifying forms a polymer of greater resistance to fracture than the sheets and adheres to the sheets, forming around the periphery of the sheets a continuous tape-like barrier to passage of the liquid thereby to retain the liquid between the sheets, wherein at least part of the barrier is gas-permeable, expelling air from the intersheet space through the barrier so as to cause the liquid to fill the intersheet space, and solidifying the liquid to form a bonded laminate.
Claim 2
Independent Claim
105 words
A method of producing a laminate comprising placing a pair of sheets of frangible material in face-to-face relationship, introducing between the sheets a liquid which on solidifying forms a polymer of greater resistance to fracture than the sheets and adheres to the sheets, forming around the periphery of the sheets a continuous tape-like barrier to passage of the liquid thereby to retain the liquid between the sheets, wherein at least part of the barrier is gas-permeable, expelling air from the intersheet space through the barrier so as to cause the liquid to fill the intersheet space, and solidifying the liquid to form a bonded laminate.
Claim 3
Dependent Claim
19 words
A method according to claim 1, wherein the barrier is formed by adhesive tape for adhering to the sheets.
Claim 4
Dependent Claim
12 words
A method according to claim 1, wherein the entire barrier is gas-permeable.
Claim 5
Dependent Claim
17 words
A method according to claim 1, wherein the sheets are selected from glass, polymethyl methacrylate and polycarbonate.
Claim 6
Dependent Claim
13 words
A method according to claim 1, wherein the sheets and polymer are translucent.
Claim 7
Dependent Claim
17 words
A method according to claim 5, wherein the sheets and polymer have generally the same refractive index.
Claim 8
Dependent Claim
22 words
A method according to claim 1, wherein the polymer formed from the liquid is selected from polyesters, vinyl polymers and epoxy resins.
Claim 9
Independent Claim
141 words
A method of producing a laminate comprising placing a pair of sheets of frangible material in spaced face-to-face relationship, sealing the sheets together around pair of their periphery to form an envelope, tilting the envelope so that the unsealed portion of the sheets is uppermost, introducing into the envelope through the unsealed portion a measured quantity of a liquid which on solidifying forms a polymer of greater resistance to fracture than the sheets and adheres to the sheets, sealing the unsealed portion to form around the periphery of the sheets a continuous tape-like barrier to passage of the liquid, at least an upper portion of the barrier being permeable to air, allowing air to escape from the envelope through the barrier so as to cause the liquid to fill the intersheet space and solidifying the liquid to form a bonded laminate.
Claim 10
Independent Claim
141 words
A method of producing a laminate comprising placing a pair of sheets of frangible material in spaced face-to-face relationship, sealing the sheets together around pair of their periphery to form an envelope, tilting the envelope so that the unsealed portion of the sheets is uppermost, introducing into the envelope through the unsealed portion a measured quantity of a liquid which on solidifying forms a polymer of greater resistance to fracture than the sheets and adheres to the sheets, sealing the unsealed portion to form around the periphery of the sheets a continuous tape-like barrier to passage of the liquid, at least an upper portion of the barrier being permeable to air, allowing air to escape from the envelope through the barrier so as to cause the liquid to fill the intersheet space and solidifying the liquid to form a bonded laminate.
Claim 11
Dependent Claim
16 words
A method according to claim 8, wherein the liquid is poured into the envelope under gravity.
Claim 12
Dependent Claim
12 words
A method according to claim 8, wherein the entire barrier is air-permeable.
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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) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |