US4349587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating fiber waveguides
Assignee: Furukawa Electric North America Inc
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Filing: 1981-03-12
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Granted: 1982-09-14
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Expires: 2001-03-12
Abstract
Abstract The specification describes techniques for coating fiber waveguides by passing the fiber through a reservoir of coating material while preventing the gross accumulation of bubbles in the reservoir. Preventing accumulation of bubbles improves coating concentricity and quality.
Inventors
- 👤 Charles J. Aloisio, Jr.
- 👤 Lee L. Blyler, Jr.
- 👤 George S. Brockway
- 👤 Arthur C. Hart, Jr.
- 👤 Carl R. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:48
CPC Classifications
D; D06; D06B; D06B3/00; C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
Method for the manufacture of coated fiber comprising the steps of: pulling the fiber from a fiber source, passing the pulled fiber through a reservoir of liquid coating material and thereafter through an exit die in the reservoir, the invention characterized in that the fiber is passed through the liquid coating material at a rate rapid enough to cause bubbles to become entrained in the reservoir, and characterized further by the step of continuously removing bubbles from the liquid coating material.
Claim 2
Dependent Claim
81 words
Method for the manufacture of coated fiber comprising the steps of: pulling the fiber from a fiber source, passing the pulled fiber through a reservoir of liquid coating material and thereafter through an exit die in the reservoir, the invention characterized in that the fiber is passed through the liquid coating material at a rate rapid enough to cause bubbles to become entrained in the reservoir, and characterized further by the step of continuously removing bubbles from the liquid coating material.
Claim 3
Dependent Claim
14 words
The method of claim 1 in which the bubbles are removed by a baffle.
Claim 4
Dependent Claim
14 words
The method of claim 1 in which coating material is circulated through the reservoir.
Claim 5
Dependent Claim
37 words
The method of claim 1 in which the fiber is passed through a reservoir having an upper and lower chamber with a baffle therebetween, and the coating material in the lower chamber is maintained substantially bubble free.
Claim 6
Dependent Claim
103 words
Method for the manufacture of coated fiber comprising the steps of: pulling the fiber from a fiber source, passing the pulled fiber through a reservoir of liquid coating material and thereafter through an exit die in the reservoir, the invention characterized in that the fiber is passed through the liquid coating material at a rate rapid enough to cause entrainment of bubbles where the fiber passes into the liquid coating material, and characterized further by the step of exposing the fiber to an abrupt hydrodynamic pressure change while the fiber is within the reservoir and prior to its entry into the exit die.
Claim 7
Dependent Claim
103 words
Method for the manufacture of coated fiber comprising the steps of: pulling the fiber from a fiber source, passing the pulled fiber through a reservoir of liquid coating material and thereafter through an exit die in the reservoir, the invention characterized in that the fiber is passed through the liquid coating material at a rate rapid enough to cause entrainment of bubbles where the fiber passes into the liquid coating material, and characterized further by the step of exposing the fiber to an abrupt hydrodynamic pressure change while the fiber is within the reservoir and prior to its entry into the exit die.
Claim 8
Dependent Claim
17 words
The method of claim 5 in which the pressure change is equivalent to at least 300 psi/sec.
Claim 9
Dependent Claim
22 words
The method of claim 6 in which the fiber is passed through the liquid coating material at a rate exceeding 1/3 meter/sec.
Claim 10
Dependent Claim
20 words
The method of claim 5 in which the abrupt pressure change is created by passing the fiber through a baffle.
Claim 11
Dependent Claim
23 words
The method of claim 8 in which the opening in the baffle is less than three times the diameter of the uncoated fiber.
Claim 12
Dependent Claim
83 words
Method for applying a liquid material to the surface of a fiber comprising the steps of: passing the fiber through a reservoir containing the liquid material, the invention characterized in that the fiber is passed through the liquid material at a rate sufficient to cause bubbles to become entrained in the liquid material and characterized further by the step of exposing the fiber to an abrupt hydrodynamic pressure change while the fiber is within the reservoir and prior to its leaving the reservoir.
Claim 13
Dependent Claim
83 words
Method for applying a liquid material to the surface of a fiber comprising the steps of: passing the fiber through a reservoir containing the liquid material, the invention characterized in that the fiber is passed through the liquid material at a rate sufficient to cause bubbles to become entrained in the liquid material and characterized further by the step of exposing the fiber to an abrupt hydrodynamic pressure change while the fiber is within the reservoir and prior to its leaving the reservoir.
Claim 14
Dependent Claim
18 words
The method of claim 10 in which the abrupt pressure change is equivalent to at least 300 psi/sec.
References Cited (Backward Citations)
US4246299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-13 | 1986-03-15 | 1986-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-13 | 1990-03-15 | 1990-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-13 | 1994-03-15 | 1994-09-14 | $7700.00 | Window Closed / Lapsed |