US3999971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing crimped fiber glass strand
Assignee: PPG Industries Inc
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Filing: 1975-08-13
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Granted: 1976-12-28
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Expires: 1995-08-13
Abstract
Abstract Crimped fibers in novel form are described in which mats of fiber are provided which are characterized by having the fibers interlocked in both horizontal and vertical directions. A method of preparing such fiber glass mats is described and involves attenuating a plurality of fibers in spaced parallel relationship at extremely high speeds and projecting them onto a collecting surface while they are traveling at high rates of speed to interrupt the flow of fibers and produce by this interruption a plurality of bends in the fibers as they are being collected. The high inertial force inherent in the fibers traveling at high speeds as they strike the collection surface imparts to the fibers a novel crimping action. By collecting a multiplicity of layers of fibers produced in this manner fiber glass mats are produced which have a needled appearance with the glass fibers constituting the mat being interlocked in a multiplicity of directions as well as in the horizontal and vertical plane. Methods of producing these fiber glass mats on collect type winders as well as on continuous belt mat surfaces are described.
Inventors
- 👤 Warren W. Drummond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:00
CPC Classifications
D; D02; D02G; D02G1/00; Y; Y10; Y10S; Y10S242/00; Y10S242/92
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
An apparatus for producing a crimped fiber glass mass comprising means for attenuating a plurality of glass fiber strands in parallel with respect to each other, means to release said glass fiber strands from said attenuation means into space in a straight line while maintaining said strands in parallel with respect to each other, means to interrupt and collect said glass fiber strands from said release means, said interruption means being positioned between about 1 to 6 inches of said release means to cause said glass fiber strands released therefrom to bend sharply against themselves as they strike said interruption means, means to reciprocate said interruption means in a horizontal plane while rotating the interruption means to permit the collection of a mass of glass fiber strands across the surface of the interruption means to any desired depth.
Claim 2
Independent Claim
138 words
An apparatus for producing a crimped fiber glass mass comprising means for attenuating a plurality of glass fiber strands in parallel with respect to each other, means to release said glass fiber strands from said attenuation means into space in a straight line while maintaining said strands in parallel with respect to each other, means to interrupt and collect said glass fiber strands from said release means, said interruption means being positioned between about 1 to 6 inches of said release means to cause said glass fiber strands released therefrom to bend sharply against themselves as they strike said interruption means, means to reciprocate said interruption means in a horizontal plane while rotating the interruption means to permit the collection of a mass of glass fiber strands across the surface of the interruption means to any desired depth.
Claim 3
Independent Claim
140 words
An apparatus for producing crimped fiber glass mat comprising means to pass a plurality of glass fiber strands in parallel between two movable, high speed belts, means to rapidly advance the glass fiber strands in a straight line between said belts, means to flex both belts away from each other to eject the parallel glass fiber strands in a straight line, means to collect the glass fiber strands on a surface spaced between about 1 to about 6 inches of said flexing means so that the fibers are essentially traveling in a straight line and have no substantial wave motion imparted to them before they contact said collection surface, means to move said collecting surface in a horizontal plane and means to reciprocate said ejection means across the said collecting surface transverse to the direction of travel of said surface.
Claim 4
Independent Claim
140 words
An apparatus for producing crimped fiber glass mat comprising means to pass a plurality of glass fiber strands in parallel between two movable, high speed belts, means to rapidly advance the glass fiber strands in a straight line between said belts, means to flex both belts away from each other to eject the parallel glass fiber strands in a straight line, means to collect the glass fiber strands on a surface spaced between about 1 to about 6 inches of said flexing means so that the fibers are essentially traveling in a straight line and have no substantial wave motion imparted to them before they contact said collection surface, means to move said collecting surface in a horizontal plane and means to reciprocate said ejection means across the said collecting surface transverse to the direction of travel of said surface.
Claim 5
Independent Claim
160 words
An apparatus for producing a crimped fiber glass mass comprising means to apply a coating to a plurality of glass fiber strands, means to spread the said glass fiber strands and maintain them in parallel with respect to each other and spaced apart from each other, means to attenuate the spaced-apart parallel strands at high speed between two surfaces to maintain them in parallel with each other, means to release the parallel glass fiber strands in a straight line at high velocity, collecting means to interrupt the path of travel of said parallel glass fiber strands and spaced between about 1 to about 6 inches of said release means to insure that said fiber glass strands have no substantial wave motion imparted to them prior to contacting said collecting means, means to rotate said collecting means and means to reciprocate the collecting means to thereby provide for collection of fibers across the surface of said collecting means while it rotates.
Claim 6
Independent Claim
160 words
An apparatus for producing a crimped fiber glass mass comprising means to apply a coating to a plurality of glass fiber strands, means to spread the said glass fiber strands and maintain them in parallel with respect to each other and spaced apart from each other, means to attenuate the spaced-apart parallel strands at high speed between two surfaces to maintain them in parallel with each other, means to release the parallel glass fiber strands in a straight line at high velocity, collecting means to interrupt the path of travel of said parallel glass fiber strands and spaced between about 1 to about 6 inches of said release means to insure that said fiber glass strands have no substantial wave motion imparted to them prior to contacting said collecting means, means to rotate said collecting means and means to reciprocate the collecting means to thereby provide for collection of fibers across the surface of said collecting means while it rotates.
Claim 7
Independent Claim
141 words
An apparatus for producing a crimped fiber glass tape comprising means to apply a lubricant to a plurality of spaced-apart glass fiber strands, means to spread the glass fiber strands and maintain them in parallel with each other in a spaced-apart relationship, means to attenuate the glass fiber strands at high speed between two surfaces to maintain the said strands in parallel with each other, means to release the parallel glass fiber strands in a straight line at a high velocity, means to interrupt the strands traveling at the high velocity and spaced between about 1 to about 6 inches of said release means to insure that no substantial wave motion is imparted to them prior to contacting said means to interrupt, means to rotate the said interrupting means and means to collect the fibers being expelled from said interrupting means.
Claim 8
Independent Claim
141 words
An apparatus for producing a crimped fiber glass tape comprising means to apply a lubricant to a plurality of spaced-apart glass fiber strands, means to spread the glass fiber strands and maintain them in parallel with each other in a spaced-apart relationship, means to attenuate the glass fiber strands at high speed between two surfaces to maintain the said strands in parallel with each other, means to release the parallel glass fiber strands in a straight line at a high velocity, means to interrupt the strands traveling at the high velocity and spaced between about 1 to about 6 inches of said release means to insure that no substantial wave motion is imparted to them prior to contacting said means to interrupt, means to rotate the said interrupting means and means to collect the fibers being expelled from said interrupting means.
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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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |