US3779844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for improving the tensile strength of a multifilament glass strand
Assignee: UNIROYAL PLASTICS COMPANY Inc WORLD HEADQUARTERS MIDDLEBURY CT 06749 A CORP OF
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Filing: 1971-12-10
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Granted: 1973-12-18
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Expires: 1991-12-10
Abstract
Abstract An apparatus and method for improving the tensile strength of a resin impregnated multifilament glass strand are disclosed. The glass strand is conveyed through an impregnating solution, simultaneously being maintained under tension while being vibrated. Each filament vibrates at its respective, natural frequency with the result that the glass strand separates into its component filaments thereby exposing a plurality of interstices to the solution so as to increase the amount of solution absorbed, whereby the tensile strength of the resin impregnated glass strand is improved.
Inventors
- 👤 R Dorsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:26
CPC Classifications
B; B29; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; B29B15/125; C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/16; D; D07; D07B; D07B7/00; D07B7/16; D07B7/18; D07B7/185; D07B2201/00; D07B2201/20; D07B2201/2075; D07B2201/2079; D07B2201/2081
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
27 words
A method as recited in claim 1, further comprising the step of: e heating said impregnating solution prior to advancing said glass strand through said impregnating solution.
Claim 2
Dependent Claim
32 words
A method as recited in claim 2, wherein said impregnating solution is heated to a temperature ranging from substantially about 200* F. up to but substantially no greater than about 250* F.
Claim 3
Dependent Claim
29 words
A method as recited in claim 1, wherein said glass strand is vibrated at a frequency ranging from about 2820 cycles per minute to about 2,900 cycles per minute.
Claim 4
Dependent Claim
22 words
A method as recited in claim 4, wherein said glass strand is vibrated at a frequency of about 2,850 cycles per minute.
Claim 5
Dependent Claim
29 words
A method as recited in claim 1, wherein said glass strand is vibrated at an amplitude ranging from about 1/32 of an inch to about 1/16 of an inch.
Claim 6
Dependent Claim
22 words
A method as recited in claim 6, wherein said glass strand is vibrated at an amplitude of about 1/16 of an inch.
Claim 7
Dependent Claim
65 words
A method as recited in claim 1 wherein the entire vibrated portion of the said strand is supported at two spaced points and wherein vibration of said strand is effected by applying mechanical vibrating means directly thereto at a point intermediate said spaced points and located substantially nearer to the first point of support for the moving strand than to the other point of support.
Claim 8
Independent Claim
146 words
An apparatus for improving the tensile strength of a multifilament glass strand, having interstices formed between the filaments, said filaments having different diameters comprising: a container for holding a body of an adhesive impregnating solution; means for advancing said glass strand through said body of impregnating solution; means for maintaining said glass strand under substantially constant tension as said glass strand is being conveyed through said body of impregnating solution; and means for mechanically imparting vibration to said glass strand as said glass strand is being conveyed through said impregnating solution while the entire vibrated portion of said strand is completely submerged in said body such that each of said filaments of said glass strand vibrate separately, each at its respective natural frequency, thus allowing the adhesive to flow into the interstices of said filament bundle, whereby the tensile strength of said glass strand is improved.
Claim 9
Dependent Claim
25 words
An apparatus as recited in claim 9, further comprising means for heating said impregnating solution prior to advancing said glass strand through said impregnating solution.
Claim 10
Dependent Claim
26 words
An apparatus as recited in claim 9, further comprising means for drying said glass strand after said glass strand has been conveyed through said impregnating solution.
Claim 11
Dependent Claim
75 words
An apparatus as recited in claim 9 including two spaced means for supporting the vibrated portion of said strand as it advances Through said body, and wherein said means for mechanically imparting vibration to said strand directly engages said strand at a point intermediate said two spaced supporting means and located substantially nearer to the first of said spaced supporting means which first engages said strand than to the other of said spaced supporting means.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |