Patent US5782861A successfully refreshed from Google Patents.
US4098926A
Expired / Lapsed
US
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Method of producing optical cables
Assignee: Siemens AG
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Filing: 1977-02-22
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Granted: 1978-07-04
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Expires: 1997-02-22
Abstract
Abstract A method more easily producing improved enveloped photoconducting fibers or cables which comprises coating the fibers of cable with a soft cast resin thus preventing fabricating stresses as well as mechanical forces imparted to the encapsulated fibers by the envelope according to the prior art. Preferably the fiber or bundle of fibers is first coated with a soft cast resin and then hardening said resin about said fiber or bundle of fibers by a chemical reaction to form a flexible and mechanically stable body.
Inventors
- 👤 Bjorn Nothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C03C25/1065; G; G02; G02B; G02B6/00; G02B6/44; G02B6/4479; G02B6/4486; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A method of enveloping at least one optical fiber element by first enveloping such fiber element with a continuous layer of a soft cast synthetic resin and then hardening said resin about said fiber element by a chemical reaction to form a flexible and mechanically stable optical body.
Claim 2
Independent Claim
48 words
A method of enveloping at least one optical fiber element by first enveloping such fiber element with a continuous layer of a soft cast synthetic resin and then hardening said resin about said fiber element by a chemical reaction to form a flexible and mechanically stable optical body.
Claim 3
Dependent Claim
42 words
A method as defined in claim 1 wherein said soft cast synthetic resin is a material hardenable by chemical reaction at relatively low temperatures and is selected from the group consisting of isocyanates, epoxides, unsaturated polyesters, silicones, ethylene derivatives and mixtures thereof.
Claim 4
Dependent Claim
22 words
A method as defined in claim 2 wherein said soft cast synthetic resin forms a foam-type sleeve about said optical fiber element.
Claim 5
Dependent Claim
51 words
A method as defined in claim 3 including soaking the foam-type body having enveloped therein said optical fiber element in a liquid which is substantially inert to said body and which has a very low vapor pressure and an index of refraction substantially similar to that of said optical fiber element.
Claim 6
Dependent Claim
57 words
A method as defined in claim 1 wherein, prior to enveloping the optical fiber element within the soft cast synthetic resin, said optical fiber element is coated with a relatively thin continuous layer of a material having sufficient viscosity to maintain the continuity of such layer when another layer is applied on top of such continuous layer.
Claim 7
Dependent Claim
59 words
A method as defined in claim 5 wherein said optical fiber element, prior to envelopment within the soft cast synthetic resin, is coated with a layer of a solution consisting of silicone oil in ethyl acetate, evaporating at least a portion of the ethyl acetate after application and applying a layer of talcum onto the so-coated optically transmissive elements.
Claim 8
Dependent Claim
18 words
A method as defined in claim 6 including applying a lubricating and separating layer onto the talcum layer.
Claim 9
Dependent Claim
40 words
A method as defined in claim 1 wherein a material selected from the group consisting of metal powder and graphite powder is intermixed with the soft cast synthetic resin and said optical fiber element is enveloped within such resin-material mixture.
Claim 10
Dependent Claim
29 words
A method as defined in claim 8 including applying an electrically insulating layer on top of the body composed of hardened resin-material mixture having the optical fiber element therein.
Claim 11
Dependent Claim
26 words
A method as defined in claim 9 including placing an indicia on the electrically insulating layer for identifying the optical fiber element within the resultant body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |