US4080045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical fiber bundle with reinforced end portions
Assignee: Olympus Corp
•
Filing: 1977-01-28
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Granted: 1978-03-21
•
Expires: 1997-01-28
Abstract
Abstract An optical fiber bundle having end portions where respective fibers are fixed together and a middle portion where respective fibers are separated from each other and provided with reinforcing pipes covering portions near border lines between said middle portion and said end portions, portions near end portions of said optical fiber bundle having high strength against bending.
Inventors
- 👤 Toshio Nakatsubo
- 👤 Kaoru Ohyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:34
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/04; G02B6/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
An optical fiber bundle with reinforced end portions comprising a fiber bundle having end portions where respective fibers each covered with a layer of acid-soluble glass are fixed together and a middle portion where respective fibers are separated from each other by dissolving said layers of acid-soluble glass by acid, and a plastic material of a type which contracts only a small amount during curing filled into interstices between respective fibers at those portions that are close to border lines between said middle portion of said fiber bundle and each of said end portions and where sludge of said acid-soluble glass exists, the amount of sludge remaining in interstices between optical fibers being larger at the portion closer to each border line and being smaller towards the middle portion, said plastic material also being of a type that remains flexible after curing.
Claim 2
Dependent Claim
142 words
An optical fiber bundle with reinforced end portions comprising a fiber bundle having end portions where respective fibers each covered with a layer of acid-soluble glass are fixed together and a middle portion where respective fibers are separated from each other by dissolving said layers of acid-soluble glass by acid, and a plastic material of a type which contracts only a small amount during curing filled into interstices between respective fibers at those portions that are close to border lines between said middle portion of said fiber bundle and each of said end portions and where sludge of said acid-soluble glass exists, the amount of sludge remaining in interstices between optical fibers being larger at the portion closer to each border line and being smaller towards the middle portion, said plastic material also being of a type that remains flexible after curing.
Claim 3
Dependent Claim
34 words
An optical fiber bundle with reinforced end portions according to claim 1 in which circumferences of said portions of said fiber bundle close to said border lines are covered by plastics having suitable flexibility.
Claim 4
Dependent Claim
81 words
An optical fiber bundle with reinforced end portions according to claim 1 in which said plastics filled into interstices between respective fibers are formed so that hardness of said plastics is the highest at said border line and becomes gradually lower toward said middle portion where respective fibers are separated from each other, said variation in hardness being caused by the amount of sludge existing between the optical fibers being largest at the border line and smaller toward the middle portion.
Claim 5
Dependent Claim
33 words
An optical fiber bundle with reinforced end portions according to claim 1 in which said optical fiber bundle further comprises reinforcing pipes covering portions of said fiber bundle close to said border lines.
References Cited (Backward Citations)
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Cited
US3215029A
Cited
US3383192A
Cited
US3580775A
Cited
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Cited
US3830667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |