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Patent US4741597A successfully refreshed from Google Patents.
US4741597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing an optical fibre having a synthetic resin coating and optical fibre having a synthetic resin coating manufactured according to the method
Assignee: US Philips Corp
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Filing: 1985-09-30
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Granted: 1988-05-03
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Expires: 2005-09-30
Abstract
Abstract Method of manufacturing an optical fibre having a synthetic resin coating and optical fibre having a synthetic resin coating manufactured according to the method. The invention provides a method of rapidly coating an optical fibre with two layers of a synthetic resin, the first layer being formed from a reactive molten synthetic resin material. This molten synthetic resin material is solidified by cooling after which the second layer, which can be any customary curable synthetic resin composition, is applied. Next, both layers are cured together, for example, by exposure to UV-light. The reactive molten synthetic resin material comprises at least two acrylate ester groups per molecule.
Inventors
- 👤 Dirk J. Broer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:06
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/1065
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A method of manufacturing an optical fibre having a synthetic resin coating which consists of at least two layers, according to which method the optical fibre is enveloped with two synthetic resin layers immediately after it has been formed, the second synthetic resin layer being formed from a curable synthetic resin composition which is completely cured by exposing it to radiation by electrons or to UV-light radiation, characterized in that the first synthetic resin layer is formed from a molten synthetic resin material which comprises at least two acrylate ester groups per molecule, and in which the second synthetic resin layer is applied after the first layer has cooled and solidified and the two layers are completely cured simultaneously by exposure to radiation by electrons or UV-light.
Claim 2
Independent Claim
127 words
A method of manufacturing an optical fibre having a synthetic resin coating which consists of at least two layers, according to which method the optical fibre is enveloped with two synthetic resin layers immediately after it has been formed, the second synthetic resin layer being formed from a curable synthetic resin composition which is completely cured by exposing it to radiation by electrons or to UV-light radiation, characterized in that the first synthetic resin layer is formed from a molten synthetic resin material which comprises at least two acrylate ester groups per molecule, and in which the second synthetic resin layer is applied after the first layer has cooled and solidified and the two layers are completely cured simultaneously by exposure to radiation by electrons or UV-light.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1, characterized in that the molten synthetic resin material used is a polyurethane acrylate compound.
Claim 4
Dependent Claim
26 words
A method as claimed in claim 1 characterized in that the molten synthetic resin material comprises of from 0.1 to 2% by weight of aluminum stearate.
Claim 5
Dependent Claim
21 words
A method as claimed in claim 1, characterized in that both synthetic resin layers are cured by means of electron radiation.
Claim 6
Dependent Claim
33 words
A method as claimed in claim 1, characterized in that the molten synthetic resin material comprises a light sensitive initiator, and that both synthetic resin layers are cured by means of UV-light radiation.
Claim 7
Dependent Claim
40 words
A method as claimed in claim 5, characterized in that the molten synthetic resin material comprises of from 1 to 5% by weight of the light sensitive initiator which is selected from the group consisting of 2,2-dimethoxy-2-phenyl-acetophenone, 2,2-diethoxy-acetophenone and 2,2-dimethyl-2-hydroxy-acetophenone.
Claim 8
Dependent Claim
32 words
An optical fibre having a synthetic resin coating manufactured by means of the method as claimed in claim 1 characterized in that the optical fibre is further provided with a thermoplastic cladding.
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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |