US4205108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface finished fabric
Assignee: Carl Freudenberg KG
•
Filing: 1977-05-12
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Granted: 1980-05-27
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Expires: 1997-05-12
Abstract
Abstract A sheet material finished on at least one side with a coherent surface layer is formed by electrostatically spraying a solution or dispersion of plastics producing fibers from 0.1 to 30 microns in diameter. Then the mat is consolidated with heat and pressure, whereby the fibers form a tight bond with the surface of the support material which is thus finished.
Inventors
- 👤 Klaus Schmidt
- 👤 Harald Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:59
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/10; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/28; B29C70/30; B29C70/305; B44; B44F; B44F9/00; B44F9/12; B32B2310/00; B32B2310/021; B32B2310/025; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23943; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24405; Y10T428/24438
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A process for the production of a sheet material finished on at least one side with a coherent surface layer, comprising said process consisting essentially of electrostatically spraying onto at least one surface of a rubber bonded support material fibrous substrate a liquid medium containing thermoplastic resinous fiber-forming material which medium upon spraying forms a very fine mat of fibers having a diameter of about 0.1 to 30 microns, and then applying to the mat sufficient heat and pressure to consolidate the fibers to one another and to the substrate while smoothing the surface to form a permeable microporous finished sheet material of high surface luster.
Claim 2
Dependent Claim
106 words
A process for the production of a sheet material finished on at least one side with a coherent surface layer, comprising said process consisting essentially of electrostatically spraying onto at least one surface of a rubber bonded support material fibrous substrate a liquid medium containing thermoplastic resinous fiber-forming material which medium upon spraying forms a very fine mat of fibers having a diameter of about 0.1 to 30 microns, and then applying to the mat sufficient heat and pressure to consolidate the fibers to one another and to the substrate while smoothing the surface to form a permeable microporous finished sheet material of high surface luster.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein the fibers are deposited in about 5-50 g/m 2 .
Claim 4
Dependent Claim
11 words
A finished sheet material produced by the process of claim 1.
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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) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |