US4401706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-ply heat-insulating material
Assignee: Individual
•
Filing: 1981-10-27
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Granted: 1983-08-30
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Expires: 2001-10-27
Abstract
Abstract This heat-insulating material comprises at least one layer of plain paper or plastic web provided on one face with a thin metal film having a thickness of 1 to 20 microns, and at least one layer of corrugated paper or pasteboard glued only along the crests of its waves to the metal coating of the first layer, the side of the corrugated web which faces the plain web layer being likewise coated with a metal film. Thus, substantially the entire area of the two metal layers are in constant mutual contact with the cavities formed by the waves of the corrugated web, which have a thickness of at least 1 to 1.5 mm. This feature and the specific arrangement of the layers are such that the metallized surfaces thereof face the direction in which the heat-flow is to be insulated, thus affording a particularly high heat-insulating efficiency.
Inventors
- 👤 Heinz Sovilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:41
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B32B15/00; B32B15/04; B32B15/12; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; B32B2317/00; B32B2317/12; B32B2317/127; E04B2001/7691; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24562; Y10T428/24612; Y10T428/24628; Y10T428/24661; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727; Y10T428/249921; Y10T428/249953; Y10T428/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
Multi-ply heat-insulating structure of which one side is exposed to heat, comprising a plurality of superposed webs of non-metallic supporting material assembled with cavities between successive webs, and a thin reflective metal layer bonded on one face only of each web facing said cavities, said cavities having a depth not less than 1 mm and said metal layer having a thickness of 1 to 20 microns and being on that face of the respective web which faces away from the side of said structure exposed to heat.
Claim 2
Dependent Claim
87 words
Multi-ply heat-insulating structure of which one side is exposed to heat, comprising a plurality of superposed webs of non-metallic supporting material assembled with cavities between successive webs, and a thin reflective metal layer bonded on one face only of each web facing said cavities, said cavities having a depth not less than 1 mm and said metal layer having a thickness of 1 to 20 microns and being on that face of the respective web which faces away from the side of said structure exposed to heat.
Claim 3
Dependent Claim
17 words
Multi-ply heat-insulating structure according to claim 1, wherein the thickness of said metal layer is 10 microns.
Claim 4
Dependent Claim
29 words
Multi-ply heat-insulating structure according to claim 1, wherein said cavities have a depth in the range of 1 to 4 mm in the direction of thickness of said structure.
Claim 5
Dependent Claim
29 words
Multi-ply heat-insulating structure according to claim 1, wherein said structure comprises planar webs alternating with corrugated webs with a metal coating on said planar webs and said corrugated webs.
Claim 6
Dependent Claim
22 words
Multi-ply heat-insulating structure according to claim 4, wherein the metal layer on said corrugated webs is thinner than on said planar webs.
Claim 7
Dependent Claim
47 words
Multi-ply heat-insulating structure according to claim 1, wherein said structure comprises at least one planar web and a plurality of corrugated webs with adjacent corrugated webs shifted one half wave length relative to one another, said corrugated webs being adhesively bonded to one another in mutual contact.
Claim 8
Dependent Claim
37 words
Mutli-ply heat-insulating structure according to claim 1, wherein said webs comprise superposed webs of foam material each having one plain face and one face having cavities formed therein, said metal layer being applied to said plain face.
Claim 9
Dependent Claim
27 words
Multi-ply heat-insulating structure according to claim 1, wherein successive webs are spaced apart by a multiplicity of projections formed on one of each pair of adjacent webs.
Claim 10
Dependent Claim
31 words
Multi-ply heat-insulating structure according to claim 1, wherein adjacent webs are spaced apart by a multiplicity of spikes formed on said webs and projecting from one side of the respective web.
Claim 11
Dependent Claim
19 words
Multi-ply heat-insulating structure according to claim 9, wherein said spikes have a height of about 1 to 1.5 mm.
References Cited (Backward Citations)
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Cited
US2221309A
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US3619340A
Cited
US3840425A
Cited
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |