US3844878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite flexible sheet material
Assignee: Reynolds Metals Co
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Filing: 1972-02-28
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Granted: 1974-10-29
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Expires: 1992-02-28
Abstract
Abstract A composite roofing or siding sheet and method of making the same is provided. Metal foil is laminated over a fibrous base layer by an improved polymeric bonding system.
Inventors
- 👤 H Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; E; E04; E04D; E04D5/00; E04D5/10; B32B7/00; B32B7/04; B32B7/12; E04D5/14; E04D5/141; E04D5/142; E04D5/148; B32B2323/00; B32B2323/04; B32B2323/046; B32B2323/10; B32B2333/00; B32B2333/04; B32B2333/08; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587; Y10T428/31591; Y10T428/31605; Y10T428/31652; Y10T428/31656; Y10T428/31815; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
165 words
A COMPOSITE FLEXIBLE SHEET MATERIAL SUITABLE FOR ROOFING SIDING AND THE LIKE, COMPRISING A METAL FOIL LAYER, A PRIMER ADHERING TO SAID FOIL LAYER, A POLYMERIC LAYER MADE OF A STRAIGHT CHAIN ALIPHATIC HYDROCARBON POLYMER HAVING A CH2 BACKBONE AND ADHERING TO SAID PRIMER, AND AN ASPHALT IMPREGNATED FIBROUS BASE LAYER, SAID POLYMERIC LAYER HAVING A LOWER PORTION THEREOF PARTIALLY PERMEATED WITHIN SAID FIBROUS LAYER TO INTERLOCK SAID POLYMERIC LAYER TO FIBERS IN SAID FIBROUS LAYER, SAID INTERLOCKING BEING DUE AT LEAST IN PART TO THE PRESENCE OF SAD LOWER PORTION OF SAID POLYMERIC LAYER AT LOCATIONS WHICH WOULD ORDINARILY HAVE BEEN OCCUPIED BY ASPHALT IN SAID FIBROUS BASE LAYER, SAID POLYMERIC LAYER HAVING A STRONGER BOND WITH THE ASPHALT IMPREGNATED FIBROUS LAYER THAN INTERIOR PORTIONS OF THE ASPHALT IMPREGNATED FIBROUS LAYER HAVE TO EACH OTHER, SAID POLYMERIC LAYER BEING MOISTURE RESISTANT, HAVING A HIGHER MELTING TEMPERATIR URE THAN THE ASPHALT, AND SAID POLYMERIC LAYER HAVING AN ASTM MELT INDEX BETWEEN ABOUT 2 TO 20.
Claim 2
Dependent Claim
165 words
A COMPOSITE FLEXIBLE SHEET MATERIAL SUITABLE FOR ROOFING SIDING AND THE LIKE, COMPRISING A METAL FOIL LAYER, A PRIMER ADHERING TO SAID FOIL LAYER, A POLYMERIC LAYER MADE OF A STRAIGHT CHAIN ALIPHATIC HYDROCARBON POLYMER HAVING A CH2 BACKBONE AND ADHERING TO SAID PRIMER, AND AN ASPHALT IMPREGNATED FIBROUS BASE LAYER, SAID POLYMERIC LAYER HAVING A LOWER PORTION THEREOF PARTIALLY PERMEATED WITHIN SAID FIBROUS LAYER TO INTERLOCK SAID POLYMERIC LAYER TO FIBERS IN SAID FIBROUS LAYER, SAID INTERLOCKING BEING DUE AT LEAST IN PART TO THE PRESENCE OF SAD LOWER PORTION OF SAID POLYMERIC LAYER AT LOCATIONS WHICH WOULD ORDINARILY HAVE BEEN OCCUPIED BY ASPHALT IN SAID FIBROUS BASE LAYER, SAID POLYMERIC LAYER HAVING A STRONGER BOND WITH THE ASPHALT IMPREGNATED FIBROUS LAYER THAN INTERIOR PORTIONS OF THE ASPHALT IMPREGNATED FIBROUS LAYER HAVE TO EACH OTHER, SAID POLYMERIC LAYER BEING MOISTURE RESISTANT, HAVING A HIGHER MELTING TEMPERATIR URE THAN THE ASPHALT, AND SAID POLYMERIC LAYER HAVING AN ASTM MELT INDEX BETWEEN ABOUT 2 TO 20.
Claim 3
Dependent Claim
15 words
The composite sheet of claim 1 in which the polymeric layer is low density polyethylene.
Claim 4
Dependent Claim
15 words
The composite sheet of claim 1 in which the polymeric layer is low density polypropylene.
Claim 5
Dependent Claim
14 words
The composite sheet of claim 2 in which the primer is a urethane polymer.
Claim 6
Dependent Claim
26 words
The composite sheet of claim 2 in which the asphalt impregnated fibrous layer has its side arranged opposite said polymeric layer covered with a polyethylene layer.
Claim 7
Dependent Claim
26 words
The composite sheet of claim 3 in which the asphalt impregnated fibrous layer has its side arranged opposite said polymeric layer covered with a polypropylene layer.
Claim 8
Dependent Claim
158 words
A composite flexible sheet material comprising, a fibrous base, a metal foil layer having a bottom surface coated with a first primer coating and a top Surface coated with a second primer coating, and a polymeric layer made of a straight chain aliphatic hydrocarbon polymer having a CH2 backbone, said polymeric layer having a lower portion thereof partially permeated within said fibrous base to interlock said polymeric layer to fibers in said fibrous base and having a top surface bonded against said first coating, said polymeric layer providing a bond between said fibrous base and metal foil layer and said bond being stronger than the bond between the fibers themselves of the fibrous base, said base and layers together with said coatings all being flexible to thereby assure said composite sheet is flexible, said polymeric layer combining with the other layers to assure said sheet has toughness and resistance to physical abuse and extremes of temperature and moisture.
Claim 9
Dependent Claim
158 words
A composite flexible sheet material comprising, a fibrous base, a metal foil layer having a bottom surface coated with a first primer coating and a top Surface coated with a second primer coating, and a polymeric layer made of a straight chain aliphatic hydrocarbon polymer having a CH2 backbone, said polymeric layer having a lower portion thereof partially permeated within said fibrous base to interlock said polymeric layer to fibers in said fibrous base and having a top surface bonded against said first coating, said polymeric layer providing a bond between said fibrous base and metal foil layer and said bond being stronger than the bond between the fibers themselves of the fibrous base, said base and layers together with said coatings all being flexible to thereby assure said composite sheet is flexible, said polymeric layer combining with the other layers to assure said sheet has toughness and resistance to physical abuse and extremes of temperature and moisture.
Claim 10
Dependent Claim
25 words
A composite sheet material as set forth in claim 7 in which said fibrous base is in the form of an asphalt impregnated felt paper.
Claim 11
Dependent Claim
24 words
A composite sheet material as set forth in claim 7 in which said fibrous base is in the form of an asbestos impregnated paper.
Claim 12
Dependent Claim
25 words
A composite sheet material as set forth in claim 7 in which said fibrous base is in the form of a flame retardant kraft paper.
Claim 13
Dependent Claim
38 words
A composite sheet material as set forth in claim 7 in which said second coating is a vinyl terpolymer comprising about 86 percent vinyl chloride, about 13 percent vinyl acetate, and about 1 percent maleic acid by weight.
Claim 14
Dependent Claim
17 words
A composite sheet material as set forth in claim 7 in which said polymeric layer is polyethylene.
Claim 15
Dependent Claim
17 words
A composite sheet material as set forth in claim 7 in which said polymeric layer is polypropylene.
Claim 16
Dependent Claim
49 words
A composite sheet material as set forth in claim 7 in which, said polymeric layer is polyethylene, said fibrous base is comprised of paper, and said polyethylene partially permeates into the paper, and a protective layer of plastic material is bonded against the bottom surface of said fibrous material.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |