Patent US5521722A successfully refreshed from Google Patents.
US3905855A
Expired / Lapsed
US
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Rigid fibrous panel and method of making same
Assignee: Owens Corning
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Filing: 1972-11-01
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Granted: 1975-09-16
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Expires: 1992-11-01
Abstract
Abstract A rigid fibrous panel and a method of making same are provided. The rigid panel has particular adaptability for cold storage walls with the panel being self-supporting and washable and having fire-retardant and insulating characteristics with high impact-resistance. The panel comprises a layer of highly densified glass fibers held in a rigid form by a binder with a washable plastic film adhered to the face of the layer. The plastic film can be adhered to the fibrous layer by an intermediate adhesive sheet which can also serve as an ultraviolet radiation barrier. A metal mesh or hardware cloth can also be used in or with the fibrous layer for rodent control. The method of making the panel includes densifying or compressing a fibrous layer, curing a binder in the layer to form a rigid selfsustaining mass or board, and adhering a plastic sheet or film substantially at the same time to the layer in one operation. The binder is cured with the fibrous layer compressed by heat applied to both sides of the layer, with the heat applied to the side having the plastic film being initially retarded or delayed which has been found to prevent wrinkling of the plastic film on the layer.
Inventors
- 👤 Donald A Blewett
- 👤 Richard G Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:24
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/296; B32B27/30; B32B27/304; B32B7/00; B32B7/04; B32B7/12; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/50; B32B2307/558; B32B2607/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/676
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
155 words
A METHOD OF MAKING A RIGID BUILDING PANEL COAMPRISING POSITIONING A SUBSTANTIALLY NON-POROUS AND WASHABLE PLASTIC FILM ON A CAUL PLATE, PLACING A PLURALITY OF LAYERS OF GLASS FIBEERS HAVING BINDER THEREIN ON SAID FILM, PLACING THE COMBINATION OF THE CAUL PLATE, FILM, AND FIBROUS LAYERS IN A PRESS BETWEEN HEATED UPPER AND ALOWERPLATENS, PLACING AN INSULATING LAYER ONLY BETWEEN THE LOWER PLATEN AND THE CAUL PLATE, MOVING AT LEAST ONE OF SAID PLATENS RELATIVE TO THE OTHER TO SQUEEZE AND DENSIFY THE FIBROUS LAYERS TO A FIXED THICKNESS WHILE APPLYING HEAT TO THE FIBROUS LAYERS TO CURE THE BINDER AND TO ADHERE THE PLASTIC FILM TO THE FIBROUS LAYERS, MAINTAINING THE HEAT AND PRESSURE FOR A TIME SUFFICIENT TO CURE THE BINDER TO AN EXTENT TO FORM THE FIBROUS LAYERS INTO A SELF-SUPPORTING, UNIFIED DENSIFIED MASS, SAID PLASTIC FILM BEING CAPABLE OF WITHSTANDING THE CURING HEAT, AND REMOVING RESULTING COMPOSITE PANEL FROM THE PRESS.
Claim 2
Independent Claim
155 words
A METHOD OF MAKING A RIGID BUILDING PANEL COAMPRISING POSITIONING A SUBSTANTIALLY NON-POROUS AND WASHABLE PLASTIC FILM ON A CAUL PLATE, PLACING A PLURALITY OF LAYERS OF GLASS FIBEERS HAVING BINDER THEREIN ON SAID FILM, PLACING THE COMBINATION OF THE CAUL PLATE, FILM, AND FIBROUS LAYERS IN A PRESS BETWEEN HEATED UPPER AND ALOWERPLATENS, PLACING AN INSULATING LAYER ONLY BETWEEN THE LOWER PLATEN AND THE CAUL PLATE, MOVING AT LEAST ONE OF SAID PLATENS RELATIVE TO THE OTHER TO SQUEEZE AND DENSIFY THE FIBROUS LAYERS TO A FIXED THICKNESS WHILE APPLYING HEAT TO THE FIBROUS LAYERS TO CURE THE BINDER AND TO ADHERE THE PLASTIC FILM TO THE FIBROUS LAYERS, MAINTAINING THE HEAT AND PRESSURE FOR A TIME SUFFICIENT TO CURE THE BINDER TO AN EXTENT TO FORM THE FIBROUS LAYERS INTO A SELF-SUPPORTING, UNIFIED DENSIFIED MASS, SAID PLASTIC FILM BEING CAPABLE OF WITHSTANDING THE CURING HEAT, AND REMOVING RESULTING COMPOSITE PANEL FROM THE PRESS.
Claim 3
Dependent Claim
23 words
A method according to claim 1 characterized by squeezing the fibrous layers to a thickness from one-fortieth to one-eightieth of their original thickness.
Claim 4
Dependent Claim
18 words
A method according to claim 1 characterized by maintaining said platens at a temperature of 300* - 400*F.
Claim 5
Dependent Claim
19 words
A method according to claim 1 characterized by placing a textured layer between the caul plate and the film.
Claim 6
Dependent Claim
61 words
A method according to claim 1, characterized further by placing an adhesive sheet between said plastic film and said plurality of fiber layers before moving at least one of said platens relative to the other to adhere the plastic film to the fibrous layers by adhering the plastic film to the adhesive sheet and the adhesive sheet to the fibrous layers.
Claim 7
Dependent Claim
36 words
A method according to claim 1 characterized by applying additional binder to the surfaces of at least some of said layers of fibers prior to moving at least one of the platens relative to the other.
Claim 8
Dependent Claim
31 words
A method according to claim 1 characterized by placing a wire mesh between some of said fiber layers prior to moving at least one of the platens relative to the other.
Claim 9
Independent Claim
148 words
A method of making a highly densified, rigid panel of permanent shape which comprises positioning a flexible plastic film on a surface, said film having a thickness of one to four mils and being capable of withstanding temperatures in the order of 350*F., placing an adhesive sheet over said flexible plastic film, placing a layer of glass fibers with binder on said adhesive sheet, and applying heat and pressure to the outer surface of said flexible plastic film insulating layer between said plastic film and the adjacent heat source, and to the outer surface of the fibrous layer to compress the fibrous layer while simultaneously adhering said flexible plastic film to said adhesive sheet and said adhesive sheet to the layer of fibers and curing the binder to produce a highly densified, rigid panel of permanent shape with said flexible plastic film adhered permanently to said fibrous layer.
Claim 10
Independent Claim
148 words
A method of making a highly densified, rigid panel of permanent shape which comprises positioning a flexible plastic film on a surface, said film having a thickness of one to four mils and being capable of withstanding temperatures in the order of 350*F., placing an adhesive sheet over said flexible plastic film, placing a layer of glass fibers with binder on said adhesive sheet, and applying heat and pressure to the outer surface of said flexible plastic film insulating layer between said plastic film and the adjacent heat source, and to the outer surface of the fibrous layer to compress the fibrous layer while simultaneously adhering said flexible plastic film to said adhesive sheet and said adhesive sheet to the layer of fibers and curing the binder to produce a highly densified, rigid panel of permanent shape with said flexible plastic film adhered permanently to said fibrous layer.
Claim 11
Dependent Claim
69 words
A method according to claim 8 characterized by applying heat and pressure to the outer surface of said flexible plastic film and to the outer surface of the fibrous layer by placing them between two heated platens and placing an insulating layer only between the flexible plastic film and the heated platen for the film to delay transfer of heat from said heated platen to said flexible plastic film.
Claim 12
Independent Claim
144 words
A method of making a highly densified, rigid panel of permanent shape which comprises positioning a polyvinylfluoride film on a surface, placing an adhesive sheet over said film, placing a layer of glass fibers with binder on said adhesive sheet, applying heat and pressure to the outer surface of said film and to the outer surface of the fibrous layer by placing them between two heated platens and placing an insulating layer only between the film and the heated platen for the film to delay transfer of heat from said heated platen to said film, the heat and pressure compressing the fibrous layer while simultaneously adhering said film to said adhesive sheet and said adhesive sheet to the layer of fibers, and curing the binder to produce a highly densified, rigid panel of permanent shape with said film adhered permanently to said fibrous layer.
Claim 13
Independent Claim
144 words
A method of making a highly densified, rigid panel of permanent shape which comprises positioning a polyvinylfluoride film on a surface, placing an adhesive sheet over said film, placing a layer of glass fibers with binder on said adhesive sheet, applying heat and pressure to the outer surface of said film and to the outer surface of the fibrous layer by placing them between two heated platens and placing an insulating layer only between the film and the heated platen for the film to delay transfer of heat from said heated platen to said film, the heat and pressure compressing the fibrous layer while simultaneously adhering said film to said adhesive sheet and said adhesive sheet to the layer of fibers, and curing the binder to produce a highly densified, rigid panel of permanent shape with said film adhered permanently to said fibrous layer.
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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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |