Patent US3883333A successfully refreshed from Google Patents.
US3883333A
Expired / Lapsed
US
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Method and apparatus for forming a uniform glass fiber continuous mat
Assignee: PPG Industries Inc
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Filing: 1973-10-25
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Granted: 1975-05-13
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Expires: 1993-10-25
Abstract
Abstract A method and apparatus for forming a uniform continuous glass fiber mat is described employing a plurality of glass fiber bushings with attenuators pulling the fibers and depositing them onto a first conveyor. When one of the bushings ceases operation due to a breakout for example, a switch activates a timer activating a relay which causes a second conveyor receiving the mat from a first conveyor to reduce speed to compensate for the diminished amount of glass fibers being conveyed by the first conveyor. After the bushing that is down becomes operational, a switch activates a timer and a relay to effect an increase in the speed of the second conveyor to compensate for the increased amount of glass fibers being delivered by the first conveyor. Hence a uniform density glass fiber mat is produced.
Inventors
- 👤 Richard H Ackley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:36
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; D04H3/03
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
203 words
An apparatus for forming a continuous glass fiber mat comprising: a plurality of glass fiber forming bushings; a first conveyor positioned below said bushings and adapted to receive fibers aTtenuated from said bushings; associated with each of said bushings: an attenuator for pulling the fibers from each bushing during formation, means for traversing each said attenuator transverse to the path of travel of said conveyor in order to apply said glass fibers to said conveyor in a perpendicular fashion, a home position on said traversing means on which said attenuator is positioned when the bushing is not in operation, a first signaling means associated with said home position on said traversing means, timing means activated by said signaling means, a second signaling means associated with said timing means, a second conveyor placed adjacent to said first conveyor and adapted to receive fibers from said first conveyor, the speed of said second conveyor being adjusted by said second signaling means so that when one of said bushings is not in operation, said second conveyor speed is adjusted to compensate for said inoperable bushing at a time when the said first conveyor is deficient in glass fibers thereby forming a constant glass fiber mat density.
Claim 2
Independent Claim
203 words
An apparatus for forming a continuous glass fiber mat comprising: a plurality of glass fiber forming bushings; a first conveyor positioned below said bushings and adapted to receive fibers aTtenuated from said bushings; associated with each of said bushings: an attenuator for pulling the fibers from each bushing during formation, means for traversing each said attenuator transverse to the path of travel of said conveyor in order to apply said glass fibers to said conveyor in a perpendicular fashion, a home position on said traversing means on which said attenuator is positioned when the bushing is not in operation, a first signaling means associated with said home position on said traversing means, timing means activated by said signaling means, a second signaling means associated with said timing means, a second conveyor placed adjacent to said first conveyor and adapted to receive fibers from said first conveyor, the speed of said second conveyor being adjusted by said second signaling means so that when one of said bushings is not in operation, said second conveyor speed is adjusted to compensate for said inoperable bushing at a time when the said first conveyor is deficient in glass fibers thereby forming a constant glass fiber mat density.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 including means for collecting the glass fiber mat formed, the speed of said collecting being adjusted by said second conveyor.
Claim 4
Dependent Claim
20 words
The apparatus of claim 1 having additionally a needler associated with said second conveyor to bind the glass fiber mat.
Claim 5
Independent Claim
120 words
A method of forming a continuous uniform density glass fiber mat comprising: forming glass fibers from a plurality of fiber forming bushings; depositing said glass fibers from said bushings onto a first continuous conveyor; conveying said glass fibers from said first continuous conveyor to a second continuous conveyor; adjusting the speed of said second conveyor, when at least one of said bushings is not operating and a strand deficient glass fiber mat is formed, to slow the speed of said second conveyor to allow for a uniform bulk density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said bushings are operating; and collecting the mat so formed.
Claim 6
Independent Claim
120 words
A method of forming a continuous uniform density glass fiber mat comprising: forming glass fibers from a plurality of fiber forming bushings; depositing said glass fibers from said bushings onto a first continuous conveyor; conveying said glass fibers from said first continuous conveyor to a second continuous conveyor; adjusting the speed of said second conveyor, when at least one of said bushings is not operating and a strand deficient glass fiber mat is formed, to slow the speed of said second conveyor to allow for a uniform bulk density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said bushings are operating; and collecting the mat so formed.
Claim 7
Dependent Claim
67 words
The method of claim 4 including adjusting the speed of said second conveyor, after at least one of said bushings which was not operating begins to operate to increase the speed of said second conveyor, to allow for a uniform bulk density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said bushings are operating.
Claim 8
Dependent Claim
29 words
The method of claim 4 having the additional step of adjusting the speed of collection of said glass fiber mat to correspond with the speed of said second conveyor.
Claim 9
Dependent Claim
131 words
In the method of producing a continuous glass fiber mat comprising: forming glass fibers from a plurality of bushings by means of attenuation; depositing said glass fibers perpendicularly and transversely onto a first continuous conveyor, conveying said glass fibers on said first continuous conveyor to a second continuous conveyor, thereby forming a glass fiber mat, and collecting the mat so formed; the improvement comprising adjusting the speed of said second continuous conveyor, when at least one of said bushings is not operating and a strand deficient glass fiber mat is formed, to slow the speed of said second conveyor to allow for a uniform bulk density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said bushings are operating.
Claim 10
Dependent Claim
131 words
In the method of producing a continuous glass fiber mat comprising: forming glass fibers from a plurality of bushings by means of attenuation; depositing said glass fibers perpendicularly and transversely onto a first continuous conveyor, conveying said glass fibers on said first continuous conveyor to a second continuous conveyor, thereby forming a glass fiber mat, and collecting the mat so formed; the improvement comprising adjusting the speed of said second continuous conveyor, when at least one of said bushings is not operating and a strand deficient glass fiber mat is formed, to slow the speed of said second conveyor to allow for a uniform bulk density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said bushings are operating.
Claim 11
Dependent Claim
29 words
The method of claim 7 having the additional step of adjusting the speed of collection of said glass fiber mat to correspond with the speed of said second conveyor.
Claim 12
Dependent Claim
67 words
The method of claim 7 including adjusting the speed of said second conveyor after at least one of said bushings which was not operating begins to operate to increase the speed of said second conveyor, to allow for a uniform bulk density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said Bushings are operating.
Claim 13
Independent Claim
118 words
An apparatus for forming a continuous glass fiber mat comprising: a plurality of glass fiber forming bushings, a first conveyor for receiving fibers which are attenuated from said bushings, a second conveyor for receiving glass fiber mat conveyed on said first conveyor, means for adjusting the speed of said second continuous conveyor when at least one of said bushings is not operating and a strand deficient glass fiber mat is formed, to slow the speed of said second conveyor to allow for a uniform density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said bushings are operating; and means for collecting the mat so formed.
Claim 14
Independent Claim
118 words
An apparatus for forming a continuous glass fiber mat comprising: a plurality of glass fiber forming bushings, a first conveyor for receiving fibers which are attenuated from said bushings, a second conveyor for receiving glass fiber mat conveyed on said first conveyor, means for adjusting the speed of said second continuous conveyor when at least one of said bushings is not operating and a strand deficient glass fiber mat is formed, to slow the speed of said second conveyor to allow for a uniform density of said glass fibers to be conveyed onto said second conveyor, said bulk density being the same as when all of said bushings are operating; and means for collecting the mat so formed.
Claim 15
Dependent Claim
69 words
The apparatus of claim 10 including means for adjusting the speed of said second conveyor after at least one of said bushings which was not operating begins to operate to increase the speed of said second conveyor, to allow for a uniform bulk density of said glass fibers to be conveyed on said second conveyor, said bulk density being the same as when all of said bushings are operating.
Claim 16
Dependent Claim
27 words
The apparatus of claim 10 including means for adjusting the speed of collection of said glass fiber mat to correspond with the speed of said second conveyor.
Claim 17
Dependent Claim
20 words
The method of claim 4 having the additional step of needling the glass fiber mat during the second conveying operation.
Claim 18
Dependent Claim
20 words
The method of claim 7 having the additional step of needling the glass fiber mat during the second conveying operation.
References Cited (Backward Citations)
US3293013A
Cited
US3516809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |