US4302234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming mineral fibers
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1980-06-26
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Granted: 1981-11-24
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Expires: 2000-06-26
Abstract
Abstract Apparatus for forming fibers of mineral material comprises a spinner for centrifuging the material into primary fibers and a plurality of blowers positioned circumferentially of the spinner to further attenuate the primary fibers into secondary fibers, where the blowers are substantially cylindrical gas discharge conduits adapted to impart swirling motion to the gas discharged therefrom.
Inventors
- 👤 Larry J. Guffey
- 👤 William W. Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:20
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/04; C03B37/048
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
Apparatus of the type in which a spinner is adapted to centrifuge molten mineral material through the orificed spinner peripheral wall into primary fibers and a plurality of blowers is positioned circumferentially of said spinner to further attentuate said primary fibers into secondary fibers, the improvement being each of said blowers comprising a substantially cylindrical gas discharge conduit having means positioned therein to impart a swirling motion to gas discharged therefrom.
Claim 2
Dependent Claim
71 words
Apparatus of the type in which a spinner is adapted to centrifuge molten mineral material through the orificed spinner peripheral wall into primary fibers and a plurality of blowers is positioned circumferentially of said spinner to further attentuate said primary fibers into secondary fibers, the improvement being each of said blowers comprising a substantially cylindrical gas discharge conduit having means positioned therein to impart a swirling motion to gas discharged therefrom.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 in which said means comprises a plurality of vanes mounted within said conduits to impart said swirling motion to said gas.
Claim 4
Dependent Claim
28 words
The apparatus of claim 2 in which said vanes are mounted for rotation about the longitudinal axes of said conduits, and further comprising means for rotating said vanes.
Claim 5
Independent Claim
16 words
The apparatus of claims 2 or 3 comprising means for controlling the pitch of said vanes.
Claim 6
Dependent Claim
28 words
The apparatus of claim 1 in which said means comprises helical grooves positioned on the interior surfaces of said conduits to impart said swirling motion to said gas.
Claim 7
Dependent Claim
76 words
Apparatus of the type in which a spinner is adapted to centrifuge molten mineral material through the orificed spinner peripheral wall into primary fibers and a plurality of blowers is positioned circumferentially of said spinner to further attenuate said primary fibers into secondary fibers, the improvement being each of said blowers comprising a substantially cylindrical gas discharge conduit which is mounted for rotation about its longitudinal axis to impart a swirling motion to gas discharged therefrom.
Claim 8
Dependent Claim
76 words
Apparatus of the type in which a spinner is adapted to centrifuge molten mineral material through the orificed spinner peripheral wall into primary fibers and a plurality of blowers is positioned circumferentially of said spinner to further attenuate said primary fibers into secondary fibers, the improvement being each of said blowers comprising a substantially cylindrical gas discharge conduit which is mounted for rotation about its longitudinal axis to impart a swirling motion to gas discharged therefrom.
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) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |