US4118261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for reinforcing sheet material
Assignee: Individual
•
Filing: 1976-12-27
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Granted: 1978-10-03
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Expires: 1996-12-27
Abstract
Abstract A method of reinforcing fiberglass sheet material in which an inflatable envelope having a plurality of marginally sealed perforations therethrough is applied to the surface of the material. A wet layer of settable reinforcing material is then applied over the envelope and onto that part of the sheet material exposed by the perforations. The envelope is then inflated so as to cause the wet layer to assume a cratered form which is then allowed to solidify to form a reinforcing structure on the sheet material.
Inventors
- 👤 Keith Pedler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:23
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B32B27/00; B32B27/06; B32B27/08; B32B27/32; E; E04; E04C; E04C2/00; E04C2/30; E04C2/32; B32B2262/00; B32B2262/10; B32B2262/101; B32B2305/00; B32B2305/08; B32B2315/00; B32B2315/08; B32B2315/085; B32B2323/00; B32B2323/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24628; Y10T428/24661; Y10T428/24802; Y10T428/31504; Y10T428/31855; Y10T428/31909
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
A method of reinforcing fibreglass sheet material comprising the steps of: placing against the surface of said sheet material an inflatable envelope defined by a bi-laminate sheet comprising two layers of pliant thermoplastic material, one overlaying the other and both provided with a plurality of mutually registering perforations, the marginal edge portions of said layers defining the perforations in a registering pair thereof being sealed together, substantially the entire outer periphery of each of said two layers being sealed to or integral with the adjacent outer periphery of the overlying layer; applying a wet layer of settable reinforcing fibreglass material over said envelope and onto that part of said sheet material which is exposed through said perforations; inflating said envelope so as to cause said wet layer to assume a cratered form; allowing said wet layer to solidify thereby to form a reinforcing structure on said sheet material.
Claim 2
Independent Claim
148 words
A method of reinforcing fibreglass sheet material comprising the steps of: placing against the surface of said sheet material an inflatable envelope defined by a bi-laminate sheet comprising two layers of pliant thermoplastic material, one overlaying the other and both provided with a plurality of mutually registering perforations, the marginal edge portions of said layers defining the perforations in a registering pair thereof being sealed together, substantially the entire outer periphery of each of said two layers being sealed to or integral with the adjacent outer periphery of the overlying layer; applying a wet layer of settable reinforcing fibreglass material over said envelope and onto that part of said sheet material which is exposed through said perforations; inflating said envelope so as to cause said wet layer to assume a cratered form; allowing said wet layer to solidify thereby to form a reinforcing structure on said sheet material.
Claim 3
Dependent Claim
13 words
A method as defined in claim 1 wherein said thermoplastic material is polythene.
Claim 4
Dependent Claim
23 words
A method as defined in claim 1 wherein said perforations are substantially rectangular and arranged in a regular array of rows and columns.
Claim 5
Dependent Claim
36 words
A method as defined in claim 1, and fixedly attaching conduit means to at least one of said layers to provide a passage through which air can be supplied to the interior of said inflatable envelope.
Claim 6
Dependent Claim
22 words
A method as claimed in claim 1, and placing said envelope against said surface while said surface remains in a wet condition.
References Cited (Backward Citations)
US3011930A
Cited
US3859674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |