Patent US4432807A successfully refreshed from Google Patents.
US4432807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of exfoliating coating of coated optical fiber
Assignee: Furukawa Electric Co Ltd
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Filing: 1982-03-15
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Granted: 1984-02-21
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Expires: 2002-03-15
Abstract
Abstract A method of exfoliating the coating of a coated optical fiber is described. A crack in the coating layer of the optical fiber is produced by bending means, cleaving the coating into a plurality of cleaved strip pieces while longitudinally enlarging the crack, and then cutting the strip pieces with an advantageous exfoliating tool. The exfoliating tool thus used is constructed to conveniently cleave the coating layer of the optical fiber and to cut the cleaved strip pieces. It does not damage the optical fiber upon exfoliating of the coating layer from the coated optical fiber, and can efficiently exfoliate the coating of the optical fiber.
Inventors
- 👤 Yusei Shirasaka
- 👤 Kenichi Fuse
- 👤 Haruo Umezu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:10
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/24; G02B6/245
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
A method of exfoliating a coated optical fiber in which fibrous materials are contained along the longitudinal direction of the optical fiber in the coating layer on the outer periphery of the optical fiber comprising: producing a crack of longitudinal direction of the optical fiber in the coating layer at the end of the coated optical fiber to be exfoliated and cleaving the cracked coating layer into a plurality of cleaved strip pieces while growing the crack, and outwardly bending the cleaved strip pieces at the edges provided at the positions to be exfoliated of the coating layer as basic points and bending off the cleaved strip pieces at the edges of the coating layer.
Claim 2
Independent Claim
115 words
A method of exfoliating a coated optical fiber in which fibrous materials are contained along the longitudinal direction of the optical fiber in the coating layer on the outer periphery of the optical fiber comprising: producing a crack of longitudinal direction of the optical fiber in the coating layer at the end of the coated optical fiber to be exfoliated and cleaving the cracked coating layer into a plurality of cleaved strip pieces while growing the crack, and outwardly bending the cleaved strip pieces at the edges provided at the positions to be exfoliated of the coating layer as basic points and bending off the cleaved strip pieces at the edges of the coating layer.
Claim 3
Dependent Claim
33 words
The method of exfoliating a coated optical fiber according to claim 1, wherein the crack of longitudinal direction of the optical fiber is caused by bending the end of the coated optical fiber.
Claim 4
Dependent Claim
15 words
The method according to claim 2, wherein the edges are provided at an exfoliating tool.
Claim 5
Dependent Claim
47 words
The method according to claim 3, wherein the exfoliating tool is mounted at the end of the coated optical fiber before or after the crack of the longitudinal direction of the optical fiber is produced in the coating layer at the end of the coated optical fiber.
Claim 6
Dependent Claim
33 words
The method according to claim 4, wherein the edges are formed at the exfoliating tool having a body of sleeve or ring shape formed with a drawing hole for the coated optical fiber.
Claim 7
Dependent Claim
25 words
The method according to claim 5, wherein the body of the exfoliating tool has tapered part formed at least at one inner or outer periphery.
Claim 8
Dependent Claim
21 words
The method according to claim 6, wherein the body of the exfoliating tool has a profile of circular or polygonal section.
Claim 9
Dependent Claim
24 words
The method according to claim 7, wherein the drawing hole of the exfoliating tool is similar to the profile of the coated optical fiber.
Claim 10
Dependent Claim
19 words
The method according to claim 8, wherein the body of the exfoliating tool has a pair of split pieces.
Claim 11
Dependent Claim
35 words
The method according to claim 9, wherein a pair of the split pieces forming the body of the exfoliating tool are mounted at the ends of a pair of grips pivotally secured in X shape.
Claim 12
Dependent Claim
27 words
The method according to claim 9, wherein a pair of the split pieces forming the body of the exfoliating tool are relatively openably connected via a hinge.
Claim 13
Dependent Claim
29 words
The method according to claim 9, wherein the drawing hole of the body of the exfoliating tool has an anti-skid structure on the inner periphery of the drawing hole.
Claim 14
Dependent Claim
15 words
The method according to claim 12, wherein the anti-skid structure is formed of acute projection.
Claim 15
Dependent Claim
19 words
The method according to claim 12, wherein the anti-skid structure is formed of a member having high frictional coefficient.
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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |