Patent US4410561A successfully refreshed from Google Patents.
US4410561A
Expired / Lapsed
US
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Method of forming coated optical fiber
Assignee: Furukawa Electric North America Inc
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Filing: 1981-07-31
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Granted: 1983-10-18
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Expires: 2001-07-31
Abstract
Abstract A method of coating uncoated portions of a coated optical fiber is disclosed. In this method a grooved split mold apparatus is used. This fiber, including coated portions of the fiber are placed within the groove and appropriately tensioned so as to prevent contact between the uncoated portions of the fiber and the mold. Injection molding techniques are then used to recoat the uncoated portions of the fiber.
Inventors
- 👤 Arthur C. Hart, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:56
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/255; G02B6/2558; B; B29; B29C; B29C45/00; B29C45/14; B29C45/14549; C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/18; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29C45/0053; B29C2045/0075; B29C2045/14557
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
168 words
A method of fabricating a continuously coated optical fiber comprising, aligning an uncoated portion of a coated optical fiber with a groove in an open, grooved, split mold, the groove extending beyond the uncoated portions of the fiber to the coated portion of the fiber which adjoins the end of the uncoated portion of the fiber, the groove having a diameter, D, greater than the diameter, d, of the coated portion of the optical fiber, tensioning the optical fiber, reducing the distance between the open mold and the fiber so that the coated portion of the fiber contacts the groove surface while the uncoated portions of the fiber do not contact the groove surface, aligning the groove in the second half of the split mold with the optical fiber, closing the split mold, injecting a curable coating material into the groove until the coating material flows at least to the coated portion of the fiber and, curing the coated material, whereby a continuously coated optical fiber is obtained.
Claim 2
Independent Claim
168 words
A method of fabricating a continuously coated optical fiber comprising, aligning an uncoated portion of a coated optical fiber with a groove in an open, grooved, split mold, the groove extending beyond the uncoated portions of the fiber to the coated portion of the fiber which adjoins the end of the uncoated portion of the fiber, the groove having a diameter, D, greater than the diameter, d, of the coated portion of the optical fiber, tensioning the optical fiber, reducing the distance between the open mold and the fiber so that the coated portion of the fiber contacts the groove surface while the uncoated portions of the fiber do not contact the groove surface, aligning the groove in the second half of the split mold with the optical fiber, closing the split mold, injecting a curable coating material into the groove until the coating material flows at least to the coated portion of the fiber and, curing the coated material, whereby a continuously coated optical fiber is obtained.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the groove is semicircular or V-groove.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein the groove is semicircular and has a diameter, D, less than d+0.006 inches.
Claim 5
Dependent Claim
25 words
The method of claim 2 or 3 wherein the optical fiber is tensioned to a tension less than 10 pounds but greater than 0.1 pound.
Claim 6
Dependent Claim
18 words
The method of claim 4 wherein the curable coating material is essentially identical to the original coating material.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein the curable coating material is a UV curable material.
Claim 8
Dependent Claim
38 words
The method of claim 6 wherein the curable coating material is a UV curable coating material and wherein at least a portion of the mold is essentially transparent to UV radiation necessary to cure the UV curable material.
References Cited (Backward Citations)
US28028A
Cited
US4091062A
Cited
US3914145A
Cited
US4217027A
Cited
US4217027B1
Cited
US4049480A
Cited
US4135587A
Cited
US4152539A
Cited
US4270021A
Cited
US4201618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |