US3887970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing crimped fiber glass
Assignee: PPG Industries Inc
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Filing: 1973-12-18
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Granted: 1975-06-10
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Expires: 1993-12-18
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
2026-11-04 08:55
CPC Classifications
D; D02; D02G; D02G1/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
122 words
A method of producing crimped fiber glass mat comprising passing a plurality of fiber glass strands in an essentially parallel relationship with respect to each other through an attenuating device operating to produce a high rate of speed in the parallel strands, rapidly projecting the parallel strands being attenuated at a high rate of speed in a substantially straight line from the attenuator, interrupting the path of travel of the paralleled strands by imposing a collection surface for the strands in their path of travel and in close proximity thereto while they are being transmitted in a straight line and before any substantial wave motion is imparted to the paralleled strands and collecting an interlocked fiber glass product on said collection surface.
Claim 2
Independent Claim
122 words
A method of producing crimped fiber glass mat comprising passing a plurality of fiber glass strands in an essentially parallel relationship with respect to each other through an attenuating device operating to produce a high rate of speed in the parallel strands, rapidly projecting the parallel strands being attenuated at a high rate of speed in a substantially straight line from the attenuator, interrupting the path of travel of the paralleled strands by imposing a collection surface for the strands in their path of travel and in close proximity thereto while they are being transmitted in a straight line and before any substantial wave motion is imparted to the paralleled strands and collecting an interlocked fiber glass product on said collection surface.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the collected product is heat treated to set the crimp.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein the collected product is chemically treated to permanently set the crimp.
Claim 5
Independent Claim
145 words
A method of producing a mass of crimped fiber glass comprising passing a plurality of fiber glass strands into an attenuation zone, maintaining the strands in an essentially parallel relationship with respect to each other as they pass through said attenuation zone, operating said zone to produce in the paralleled strands passing therethrough a high rate speed, rapidly projecting the paralleled strands from said zone at the said high rate of speed and in a substantially straight line, interrupting the path of travel of said paralleled strands with a collection surface placed in their path of travel and in close enough proximity thereto so that their path of travel is interrupted before any substantial wave motion is imparted to the strands while they are in parallel and traveling at said high rate of speed and collecting an interlocking fiber glass product on said collection surface.
Claim 6
Independent Claim
145 words
A method of producing a mass of crimped fiber glass comprising passing a plurality of fiber glass strands into an attenuation zone, maintaining the strands in an essentially parallel relationship with respect to each other as they pass through said attenuation zone, operating said zone to produce in the paralleled strands passing therethrough a high rate speed, rapidly projecting the paralleled strands from said zone at the said high rate of speed and in a substantially straight line, interrupting the path of travel of said paralleled strands with a collection surface placed in their path of travel and in close enough proximity thereto so that their path of travel is interrupted before any substantial wave motion is imparted to the strands while they are in parallel and traveling at said high rate of speed and collecting an interlocking fiber glass product on said collection surface.
Claim 7
Dependent Claim
16 words
The method of claim 4 wherein the collected product is heat treated to set the crimp.
Claim 8
Dependent Claim
17 words
The method of claim 4 wherein the collected product is chemically treated to permanently set the crimp.
Claim 9
Independent Claim
146 words
A method of producing a crimped fiber glass mat comprising feeding a plurality of fiber glass strands maintained in parallel relationship with respect to each other to an attenuation zone, imparting to said paralleled fiber glass strands while they pass through said attenuating zone high velocities, projecting the strands from said attenuation zone into space with velocities such that they travel in a straight line and are maintained parallel with respect to each other, imposing a collection surface in close proximIty to the point of projection of said paralleled fiber glass strands from said attenuation zone and before any substantial wave motion has been imparted to the strands, collecting said strands on the surface utilized to interrupt their path of travel to thereby cause the fibers to flex upon themselves as they are collected thereon to form on the collection surface an interlocked fiber glass mat.
Claim 10
Independent Claim
146 words
A method of producing a crimped fiber glass mat comprising feeding a plurality of fiber glass strands maintained in parallel relationship with respect to each other to an attenuation zone, imparting to said paralleled fiber glass strands while they pass through said attenuating zone high velocities, projecting the strands from said attenuation zone into space with velocities such that they travel in a straight line and are maintained parallel with respect to each other, imposing a collection surface in close proximIty to the point of projection of said paralleled fiber glass strands from said attenuation zone and before any substantial wave motion has been imparted to the strands, collecting said strands on the surface utilized to interrupt their path of travel to thereby cause the fibers to flex upon themselves as they are collected thereon to form on the collection surface an interlocked fiber glass mat.
Claim 11
Dependent Claim
39 words
The method of claim 7 wherein the collecting surface is rotating at slower speed than the attenuation surfaces and is reciprocating in a horizontal plane to provide for collection across the entire face and circumference of the collecting surface.
Claim 12
Dependent Claim
40 words
The method of claim 7 wherein the collecting surface is a mat forming surface and the attenuation mechanism is moved across the surface of the collecting surface to provide collection of fibers across the surface and along the length thereof.
Claim 13
Independent Claim
192 words
A method of producing a mass of crimped fiber glass comprising passing a plurality of fiber glass strands into an attenuating zone while maintaining the strands during feeding through said zone in a parallel relationship with respect to each other, imparting to said fiber glass strands in said attenuation zone high rates of speed, projecting the fibers into space from said attenuation zone in a substantially straight line and in parallel with respect to each other at speeds of at least 5,000 feet per minute, providing a collection surface in the path of travel of the said strands at a distance of between about 1 to about 6 inches from the point of projection of the strands from said attenuation zone, reciprocating the collection surface to provide for a collection across the said surface and simultaneously rotating the surface at speeds of between 500 to 1500 peripheral feet per minute to thereby continuously collect strands around and across the collection surface and to permit the strands to crimp on said collection surface and provide a mass of crimped fiber glass strands thereon having the strands interlocked with one another in random directions.
Claim 14
Independent Claim
192 words
A method of producing a mass of crimped fiber glass comprising passing a plurality of fiber glass strands into an attenuating zone while maintaining the strands during feeding through said zone in a parallel relationship with respect to each other, imparting to said fiber glass strands in said attenuation zone high rates of speed, projecting the fibers into space from said attenuation zone in a substantially straight line and in parallel with respect to each other at speeds of at least 5,000 feet per minute, providing a collection surface in the path of travel of the said strands at a distance of between about 1 to about 6 inches from the point of projection of the strands from said attenuation zone, reciprocating the collection surface to provide for a collection across the said surface and simultaneously rotating the surface at speeds of between 500 to 1500 peripheral feet per minute to thereby continuously collect strands around and across the collection surface and to permit the strands to crimp on said collection surface and provide a mass of crimped fiber glass strands thereon having the strands interlocked with one another in random directions.
Claim 15
Dependent Claim
54 words
The method of claim 10 wherein the fibers are projected at speeds of 5,000 to 20,000 feet per minute, the rotating collection surface is reciprocating at about 3 to 30 feet per minute, and wherein the surface is between 3 to 4 inches from the point at which the fibers are projected into space.
Claim 16
Independent Claim
140 words
A method of producing a crimped fiber glass tape comprising passing a plurality of fiber glass strands into an attenuation zone and in parallel relationship with respect to each other, attenuating said fiber glass strands in said zone at a high rate of speed and while the strands are maintained in an essentially parallel relationship with respect to each other, rapidly projecting the strands from said attenuation zone at a high rate of speed and in a substantially straight line, interrupting the path of travel of the strands by imposing a smooth rotating surface in the path of the strands while they are being transmitted in a straight line and in parallel relationship with respect to each other, rapidly forming an interlocked fiber glass tape on said rotaitng surface and expelling the tape so formed from said rotating surface continuously.
Claim 17
Independent Claim
140 words
A method of producing a crimped fiber glass tape comprising passing a plurality of fiber glass strands into an attenuation zone and in parallel relationship with respect to each other, attenuating said fiber glass strands in said zone at a high rate of speed and while the strands are maintained in an essentially parallel relationship with respect to each other, rapidly projecting the strands from said attenuation zone at a high rate of speed and in a substantially straight line, interrupting the path of travel of the strands by imposing a smooth rotating surface in the path of the strands while they are being transmitted in a straight line and in parallel relationship with respect to each other, rapidly forming an interlocked fiber glass tape on said rotaitng surface and expelling the tape so formed from said rotating surface continuously.
References Cited (Backward Citations)
US2344892A
Cited
US2859506A
Cited
US2928121A
Cited
US3134145A
Cited
US3442751A
Cited
US3446610A
Cited
US3511625A
Cited
US3746230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |