US3639202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Complex products of resin and mineral fiber and process for making said products
Assignee: Compagnie de Saint Gobain SA
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Filing: 1966-06-20
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Granted: 1972-02-01
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Expires: 1986-06-20
Abstract
Abstract Rigid panels are made by pressing a layer of mineral fibers into a loaded stratum of hardenable resin, pressing another loaded stratum of hardenable resin into the mineral fiber stratum of the first pressing, the constitution or quantity of the third stratum differing from that of the first to provide equal mechanical properties at both faces of the sheet. The stratified sheet is then hardened and has density of load (particulate filler) increasing from the center toward the surfaces of the sheet. The sheet is preferably produced between outer pellicles of organic plastic, e.g. cellulosic, which can be removed before use. Such sheets serve as roofing and wall paneling and may be corrugated or otherwise shaped during manufacture.
Inventors
- 👤 Albert Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:11
CPC Classifications
B; B32; B32B; B32B27/00; B29; B29C; B29C70/00; B29C70/003; B29C70/02; B29C70/021; B29C70/025; B29C70/04; B29C70/28; B29C70/40; B29C70/50; B29C70/88; B29C70/887; B29K; B29K2309/00; B29K2309/08; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2041; Y10T442/2123; Y10T442/273
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
The process of claim 1, said process being carried out continuously, continuously drawing a first ribbon of pellicle over and across a supporting surface, depositing said first, second and third strata onto the first pellicle while traversing the supporting surface, and continuously applying a second ribbon of pellicle to and over said third stratum while traversing the supporting surface, the second pressing being applied to the stratified sheet through the pellicles.
Claim 2
Dependent Claim
90 words
The process of claim 2, exerting first compression transversely of the strata after deposit of said second stratum, to intermingle the mineral fiber and resin mix at their interface, and exerting a second linear compression transversely of the strata after deposit of said third stratum to intermingle the resin mix of said third stratum with the mineral fibers at their interface, said second compression being exerted by and between upper and lower rollers, and applying the second pellicle by passing the same to and about the upper of said rollers.
Claim 3
Dependent Claim
41 words
The process of claim 1, the resin mix of said first and third strata containing thermohardening resin in fluid state and containing a hardener before deposit as aforesaid, the process being completed by heating the thermohardening resin strata to hardening temperature.
Claim 4
Dependent Claim
56 words
In the process of claim 1, varying the relative percentages of resin and pulverulent filler mix deposited in said first and third strata, per unit area of sheet, to form a sheet whose completed composition increases in filler density from the median layer of the sheet, outwardly in both directions to the respective superficial layers thereof.
Claim 5
Dependent Claim
49 words
The process of claim 1, said first stratum being deposited upon a first pellicle on a supporting surface, subsequently overlaying said third stratum with a second pellicle and, prior to hardening, binding together the edges of said first and second pellicles to form a sack enclosing all said strata.
Claim 6
Dependent Claim
20 words
The process of claim 6, trimming the edges of the completed sheet and pellicles, after hardening, and removing the pellicles.
Claim 7
Dependent Claim
104 words
In the process of claim 1, the proportions of plastic and pulverulent filler in the mix comprising said first and third strata being the same, and varying the mass of the mix of said first stratum per unit area, with respect to the mass of the mix of said third stratum per unit area, in the proportions of about 60 to 90 percent for said first stratum, to about 40 to 10 percent for said third stratum, to effect a finished sheet varying uniformly in fiber-plastic mix ratios, from the median plane of the sheet outwardly in each direction to the Respective surfaces thereof.
Claim 8
Dependent Claim
44 words
In the process of claim 1, said second stratum comprising a mat of glass fibers, and subsequently to the deposit of said second stratum but before deposit of said third stratum, applying pressure to intermingle said mat and resin mix comprising said first stratum.
Claim 9
Dependent Claim
40 words
The process of claim 9, and subsequently to deposit of said third stratum and before hardening, applying pressure to the superposed three strata to intermingle the plastic mix of said third stratum with the glass fiber stratum at their interface.
Claim 10
Dependent Claim
51 words
The process of claim 1 wherein the first stratum is formed by a plastic-filler mixture and the third stratum is formed by a smaller quantity of the same mixture, the ratio between the quantities applied to form each stratum being such that the substantially symmetrical distribution of the filler is obtained.
Claim 11
Dependent Claim
124 words
The process of forming a sheet of plastic bonded, mineral fiber complex which comprises depositing a first layer of a mix of liquid thermosetting resin and pulverulent filler, laying a mat of mineral fibers over said layer, exerting compression over said mat to force the mix into the mat of fibers and to expel air from said mat, freeing said mat from compression and applying a second layer of a mix of liquid thermosetting resin and pulverulent filler over said mat, the amount of filler per unit area of mat in said first layer of mix being greater than the amount in said second layer of mix in order to obtain a substantially symmetrical distribution of the filler on both sides of the sheet.
Claim 12
Dependent Claim
48 words
The process of claim 12 wherein the proportions of liquid thermosetting resin and of pulverulent filler in said first and second layers of mix are the same, a greater amount per unit area of mat being used to form said first layer than to form said second layer.
Claim 13
Dependent Claim
37 words
The process of claim 12 wherein the proportion of pulverulent filler in the mix used to form said first layer is greater than the proportion of pulverulent filler in the mix used to form said second layer.
Claim 14
Dependent Claim
38 words
A layered article of manufacture having outer, pellicular layers and a hardened resinous interlayer containing mineral fibers and finely divided mineral filler in which the particles of mineral filler are arranged in progressing density decreasing toward the center.
Claim 15
Dependent Claim
49 words
A layered article of manufacture according to claim 15 in which the resinous interlayer is of thermally hardened resin, the mineral fibers embedded in the resin are mainly, centrally located between the pellicular layers, and the particles of mineral filler are mainly concentrated in proximity to the pellicular layers.
Claim 16
Dependent Claim
73 words
An article of manufacture in the form of slabs, sheets and the like having a unitary body comprised of hardened resin of thermosetting type, a mat or layer of glass fibers impregnated by the resin and concentrated in a region centrally located between the surfaces of the body, and mineral filler in powder form concentrated adjacent the surfaces of the body, the concentration of mineral filler decreasing toward the center of the body.
References Cited (Backward Citations)
CA721718A
Cited
US2688580A
Cited
US2697677A
Cited
US3109763A
Cited
US2894621A
Cited
US3316139A
Cited
US3385749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |