US3914477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating and drying strands
Assignee: Owens Corning
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Filing: 1973-11-28
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Granted: 1975-10-21
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Expires: 1993-11-28
Abstract
Abstract Method and apparatus for heat drying a continuous strand material by the expedient of exposing a moving array of individual strand material to blasts or jets of the heating medium as enhances accomplishment of the drying while simultaneously supporting said strand material.
Inventors
- 👤 James C Belue
- 👤 Weston C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:52
CPC Classifications
F; F26; F26B; F26B13/00; F26B13/10; F26B13/101; F26B13/104
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A METHOD OF TREATING ELONGATE FLEXIBLE STRAND MATERIAL WHICH COMPRISES, ARRANGING A PLURALITY OF INDIVIDUAL LENGTHS OF SAID ELONGATE FLEXIBLE STAND MATERIAL IN MUTUALLY SPACED, PARALLEL, HORIZONTAL ARRAY, MOVING SAID INDIVIDUAL LENGTHS LONGITUDINALLY WHICH IN SAID ARRAY, APPLYING TO SAID INDIVIDUAL LENGTHS A LIQUID IMPREGNANT COATING COMPRISING AN INCOMPLETELY CURED VULCANIZABLE ELASTOMER, AND SUBJECTING SAID ARRAY OF INDIVIDUAL LENGTHS WHILE MOVING TO A PLURALITY OF ALTERNATE, UPWARDLY AND DOWNWARDLY, RAPIDLY MOVING CURTAINS OF HEATED AIR, THEREBY (A) MAINTANING SAID LENGTHS IN SUSPENDED DISPOSITION WITHOUT PHYSICAL SUPPORT WHILE SUBJECTED TO SAID CURTAINS AND (B) DRYING AND PARTIALLY CURING SAID COATING.
Claim 2
Independent Claim
99 words
A METHOD OF TREATING ELONGATE FLEXIBLE STRAND MATERIAL WHICH COMPRISES, ARRANGING A PLURALITY OF INDIVIDUAL LENGTHS OF SAID ELONGATE FLEXIBLE STAND MATERIAL IN MUTUALLY SPACED, PARALLEL, HORIZONTAL ARRAY, MOVING SAID INDIVIDUAL LENGTHS LONGITUDINALLY WHICH IN SAID ARRAY, APPLYING TO SAID INDIVIDUAL LENGTHS A LIQUID IMPREGNANT COATING COMPRISING AN INCOMPLETELY CURED VULCANIZABLE ELASTOMER, AND SUBJECTING SAID ARRAY OF INDIVIDUAL LENGTHS WHILE MOVING TO A PLURALITY OF ALTERNATE, UPWARDLY AND DOWNWARDLY, RAPIDLY MOVING CURTAINS OF HEATED AIR, THEREBY (A) MAINTANING SAID LENGTHS IN SUSPENDED DISPOSITION WITHOUT PHYSICAL SUPPORT WHILE SUBJECTED TO SAID CURTAINS AND (B) DRYING AND PARTIALLY CURING SAID COATING.
Claim 3
Dependent Claim
23 words
The method as claimed in claim 1, wherein said curtains of air move at a rate of 10,000 to 15,000 feet per minute.
Claim 4
Independent Claim
106 words
The method of treating a strand material which comprises: arranging a plurality of individual strands in generally mutually spaced, parallel, horizontal relationship, applying to said individual strands a liquid impregnant coating comprising a incompletely cured vulcanizable elastomer, moving said individual strands axially in horizontal, spaced, mutually parallel array through a generally enclosed chamber, impressing on said individual strands while in said chamber a plurality of alternate, upwardly an downwardly, rapidly moving curtains of heated air, thereby (a) maintaining said individual strands in suspended disposition without physical support while subjected to said curtains and (b) drying and partially curing said liquid elastomeric coating, and collecting said strands.
Claim 5
Independent Claim
106 words
The method of treating a strand material which comprises: arranging a plurality of individual strands in generally mutually spaced, parallel, horizontal relationship, applying to said individual strands a liquid impregnant coating comprising a incompletely cured vulcanizable elastomer, moving said individual strands axially in horizontal, spaced, mutually parallel array through a generally enclosed chamber, impressing on said individual strands while in said chamber a plurality of alternate, upwardly an downwardly, rapidly moving curtains of heated air, thereby (a) maintaining said individual strands in suspended disposition without physical support while subjected to said curtains and (b) drying and partially curing said liquid elastomeric coating, and collecting said strands.
Claim 6
Dependent Claim
76 words
The method as claimed in claim 3, wherein said chamber has an inlet and outlet for said moving array of strands and said air is cOllected, exhausted, reheated and reintroduced a heated air in a system wherein said exhaust creates a pressure within said chamber which is less than outside said chamber, whereby air flows in said inlet and outlet tending to equalize said pressure, thereby precluding migration of air within said chamber of the outside.
Claim 7
Independent Claim
138 words
The method of impregnating individual glass strands, composed of a plurality of gathered-together glass filaments, with an elastomeric material comprising in sequence; drawing said individual strands in mutually spaced, parallel, horizontal disposition through a liquid bath of said elastomeric impregnant, whereby an amount thereof is picked up by said strands with contemporaneous penetration of impregnant to the interstices of said strand, passing said individual strands longitudinally in collective, spaces, horizontaly planar array between a series of alternatively upwardly moving and downwardly moving, spaced, mutually parallel curtains of hot air transverse to said array of moving strands, said hot air measuring about 450*F. -1100*F., said curtains of air moving at a speed of 10,000 to 15,000 feet per minute, thereby maintaining said individual strands in suspended disposition without physical support while subjected to said curtains, and collecting said strands.
Claim 8
Independent Claim
138 words
The method of impregnating individual glass strands, composed of a plurality of gathered-together glass filaments, with an elastomeric material comprising in sequence; drawing said individual strands in mutually spaced, parallel, horizontal disposition through a liquid bath of said elastomeric impregnant, whereby an amount thereof is picked up by said strands with contemporaneous penetration of impregnant to the interstices of said strand, passing said individual strands longitudinally in collective, spaces, horizontaly planar array between a series of alternatively upwardly moving and downwardly moving, spaced, mutually parallel curtains of hot air transverse to said array of moving strands, said hot air measuring about 450*F. -1100*F., said curtains of air moving at a speed of 10,000 to 15,000 feet per minute, thereby maintaining said individual strands in suspended disposition without physical support while subjected to said curtains, and collecting said strands.
Claim 9
Dependent Claim
35 words
The method as claimed in claim 5, which includes the step, prior to collecting, of passing said strands through a second series of said curtains controlled to measure a temperature of about 450*F. to 750*F.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |