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US4469736A
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Planar element for the absorption of air-transmitted sound and method of manufacturing the same
Assignee: METZELLER SCHAUM A CORP OF GERMANY GmbH
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Filing: 1983-05-20
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Granted: 1984-09-04
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Expires: 2003-05-20
Abstract
Abstract A planar element for the absorption of air-transmitted sound, includes a flexible layer of open-cell foam material including a surface having protuberances with peaks formed thereon, and a flat closed cover layer formed of synthetic foil material fastened to the peaks of the protuberances, and a method of manufacturing the same.
Inventors
- 👤 Walter Machholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:51
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24562; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
Planar element for the absorption of air-transmitted sound, comprising a flexible layer of open-cell foam material including a surface having protuberances with peaks formed thereon, and a flat closed cover layer formed of synthetic foil material fastened to said peaks of said protuberances.
Claim 2
Dependent Claim
43 words
Planar element for the absorption of air-transmitted sound, comprising a flexible layer of open-cell foam material including a surface having protuberances with peaks formed thereon, and a flat closed cover layer formed of synthetic foil material fastened to said peaks of said protuberances.
Claim 3
Dependent Claim
17 words
Planar element according to claim 1, wherein said foil has a thickness of less than 50 μm.
Claim 4
Dependent Claim
19 words
Planar element according to claim 1, wherein said foil and said foam material are connected together by flame laminating.
Claim 5
Dependent Claim
19 words
Planar element according to claim 2, wherein said foil and said foam material are connected together by flame laminating.
Claim 6
Dependent Claim
52 words
Method of manufacturing a planar element for the absorption of air-transmitted sound, including a flexible layer of opencell foam material including a surface having protuberances with peaks formed thereon, and a flat closed cover layer formed of synthetic foil material, which comprises flame laminating the foil to the peaks of the protuberances.
Claim 7
Dependent Claim
52 words
Method of manufacturing a planar element for the absorption of air-transmitted sound, including a flexible layer of opencell foam material including a surface having protuberances with peaks formed thereon, and a flat closed cover layer formed of synthetic foil material, which comprises flame laminating the foil to the peaks of the protuberances.
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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |