Patent US4280253A successfully refreshed from Google Patents.
US4280253A
Expired / Lapsed
US
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Method for collecting fibrous material
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1979-03-16
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Granted: 1981-07-28
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Expires: 1999-03-16
Abstract
Abstract A method and apparatus for collecting fibrous material (14) comprises distributing the fibrous material (14) onto a collection surface (18) to form a pack (20), and intercepting a portion of the fibrous material (14) during formation of the pack (20) with a plurality of spikes (24) extending from the collection surface (18). The spikes (24) partially penetrate the pack (20) and retain the intercepted fibrous material (14) in the upper portion (27) of the insulation pack (20).
Inventors
- 👤 Dennis S. Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:56
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/70; D04H1/72
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
In a method for producing an insulation pack of fibrous mineral material of the type in which mineral fibers are formed from a plurality of spinners, the mineral fibers are directed downwardly onto a foraminous collection surface to form the insulation pack thereon, gases are drawn downwardly through said foraminous collection surface and the insulation pack to urge the mineral fibers toward said foraminous collection surface, wherein the improvement comprises: intercepting a portion of the mineral fibers during formation of the insulation pack with a plurality of elongate members which extend from said foraminous collection surface to prevent said portion of fibrous material from being drawn by the downwardly flowing gases into the lower portion of the insulation pack.
Claim 2
Dependent Claim
119 words
In a method for producing an insulation pack of fibrous mineral material of the type in which mineral fibers are formed from a plurality of spinners, the mineral fibers are directed downwardly onto a foraminous collection surface to form the insulation pack thereon, gases are drawn downwardly through said foraminous collection surface and the insulation pack to urge the mineral fibers toward said foraminous collection surface, wherein the improvement comprises: intercepting a portion of the mineral fibers during formation of the insulation pack with a plurality of elongate members which extend from said foraminous collection surface to prevent said portion of fibrous material from being drawn by the downwardly flowing gases into the lower portion of the insulation pack.
Claim 3
Dependent Claim
40 words
The method of claim 1 comprising intercepting said portion of the fibrous material at a distance from the bottom of said pack within the range of from about 10 percent to about 60 percent of the thickness of said pack.
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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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |