US4310339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming an optical waveguide preform having a continuously removable starting member
Assignee: Corning Glass Works
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Filing: 1980-06-02
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Granted: 1982-01-12
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Expires: 2000-06-02
Abstract
Abstract A substantially continuous method of and apparatus for forming an article suitable for an optical waveguide preform wherein the starting member is continuously removed is disclosed. The preform is formed by providing a starting member or bait and applying the particulate material to the exterior surface of the starting member to form a coating thereon. The coating is longitudinally translated while simultaneously additional particulate material is applied to the coating to form a preform body with the preform body thereafter being longitudinally translated. While longitudinally translating the preform body and applying additional particulate material to the end thereof, the starting member is continuously removed from the preform body leaving a longitudinal aperture remaining in the preform body. The particulate material may be applied by one or more burners, the output of which may be controlled to provide a predetermined desired cross sectional composition variation of the resulting preform body. The so formed preformed body may thereafter be suitably heated, consolidated, and drawn into an optical waveguide.
Inventors
- 👤 Michael G. Blankenship
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:48
CPC Classifications
F; F04; F04D; F04D23/00; F04D23/008; C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/01486; C03B37/01413; C03B37/0142; C03B37/01493; C03B37/02; C03B37/025; C03B37/027; F04D29/00; F04D29/66; F04D29/661; F04D29/668; C03B2205/00; C03B2205/30; C03B2207/00; C03B2207/50; C03B2207/54
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
101 words
A substantially continuous method of forming an article comprising the steps of providing a starting member or bait, applying particulate material to the exterior surface of said starting member to form a coating thereon, longitudinally translating said coating while simultaneously applying additional quantities of said particulate material to said coating whereby a body is formed, said body being thereafter longitudinally translated, and continuously removing said starting member from said body by said longitudinal translation of said body as said additional quantities of said particulate material is applied, a longitudinal aperture remaining in said body following said removal of said starting member.
Claim 2
Dependent Claim
101 words
A substantially continuous method of forming an article comprising the steps of providing a starting member or bait, applying particulate material to the exterior surface of said starting member to form a coating thereon, longitudinally translating said coating while simultaneously applying additional quantities of said particulate material to said coating whereby a body is formed, said body being thereafter longitudinally translated, and continuously removing said starting member from said body by said longitudinal translation of said body as said additional quantities of said particulate material is applied, a longitudinal aperture remaining in said body following said removal of said starting member.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said particulate material is applied by at least one burner.
Claim 4
Dependent Claim
50 words
The method of claim 2 further comprising the step of applying a second coating of particulate material to the outside surface of the body so formed to form a cladding therefor, said body comprising the core, said second coating having an index of refraction lower than that of said core.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein said particulate material is applied by a plurality of burners.
Claim 6
Dependent Claim
28 words
The method of claim 4 wherein the composition of said particulate material from said burners is controlled to provide a predetermined desired cross-sectional composition variation of said body.
Claim 7
Dependent Claim
27 words
The method of claim 5 wherein said preform comprises a core and cladding, the index of refraction of said cladding being less than that of said core.
Claim 8
Dependent Claim
20 words
The method of claim 6 further comprising the step of heating the body so formed to consolidate said particulate material.
Claim 9
Dependent Claim
23 words
The method of claim 7 further comprising the step of collapsing said longitudinal aperture simultaneously with the step of consolidating said particulate material.
Claim 10
Dependent Claim
22 words
The method of claim 7 further comprising the step of collapsing the longitudinal aperture following the step of consolidating said particulate material.
Claim 11
Dependent Claim
29 words
The method of claim 7 further comprising the steps of heating said body to the drawing temperature of the material thereof, and drawing said body into an optical filament.
Claim 12
Dependent Claim
19 words
The method of claim 10 further comprising the step of collapsing the longitudinal aperture while drawing said optical filament.
Claim 13
Dependent Claim
20 words
The method of claim 1 further comprising the step of heating the body so formed to consolidate said particulate material.
Claim 14
Dependent Claim
21 words
The method of claim 1 further comprising the step of rotating said starting member while said particulate material is being applied.
Claim 15
Dependent Claim
30 words
The method of claim 13 further comprising the step of rotating said body in the same direction as the rotation of the starting member while simultaneously longitudinally translating said body.
Claim 16
Dependent Claim
30 words
The method of claim 13 further comprising the step of rotating said body in a direction opposite to the rotation of said starting member while simultaneously longitudinally translating said body.
Claim 17
Dependent Claim
47 words
The method of claim 13 further comprising the steps of rotating said body while simultaneously longitudinally translating it, heating the body so formed to consolidate said particulate material, heating the body to the drawing temperature of the materials thereof, and drawing said body into an optical filament.
Claim 18
Dependent Claim
23 words
The method of claim 16 further comprising the step of collapsing said longitudinal aperture simultaneously with the step of consolidating said particulate material.
Claim 19
Dependent Claim
22 words
The method of claim 16 further comprising the step of collapsing said longitudinal aperture following the step of consolidating said particulate material.
Claim 20
Dependent Claim
19 words
The method of claim 16 further comprising the step of collapsing said longitudinal aperture while drawing said optical filament.
Claim 21
Dependent Claim
19 words
The method of claim 1 further comprising the step of simultaneously rotating said body while it is longitudinally translated.
Claim 22
Independent Claim
75 words
An apparatus for forming a substantially continuous article comprising a starting member or bait, means for applying particulate material to the exterior surface of at least a portion of said starting member to form a hollow porous article, and means for longitudinally translating said hollow porous article while said particulate material is being applied, said starting member being continuously removed from said article by said longitudinal translation thereof as said particulate material is being applied.
Claim 23
Independent Claim
75 words
An apparatus for forming a substantially continuous article comprising a starting member or bait, means for applying particulate material to the exterior surface of at least a portion of said starting member to form a hollow porous article, and means for longitudinally translating said hollow porous article while said particulate material is being applied, said starting member being continuously removed from said article by said longitudinal translation thereof as said particulate material is being applied.
Claim 24
Dependent Claim
17 words
The apparatus of claim 21 wherein said means for applying particulate material is at least one burner.
Claim 25
Dependent Claim
17 words
The apparatus of claim 21 wherein said means for applying particulate material is a plurality of burners.
Claim 26
Dependent Claim
17 words
The apparatus of claim 23 further comprising an auxiliary heater disposed downstream from said plurality of burners.
Claim 27
Dependent Claim
22 words
The apparatus of claim 21 further comprising means for heating the porous article to a temperature sufficient to consolidate said particulate material.
Claim 28
Dependent Claim
28 words
The apparatus of claim 25 further comprising means for controlling the application of particulate material so as to provide a predetermined desired cross-sectional composition of said porous article.
Claim 29
Dependent Claim
32 words
The apparatus of claim 26 further comprising means for heating the porous article to the drawing temperature of the material thereof, and means for drawing said porous article into an optical filament.
Claim 30
Dependent Claim
20 words
The apparatus of claim 21 further comprising means for rotating said starting member while said particulate material is being applied.
Claim 31
Dependent Claim
24 words
The apparatus of claim 28 further comprising means for rotating said porous article in the same direction as the rotation of said starting member.
Claim 32
Dependent Claim
24 words
The apparatus of claim 28 further comprising means for rotating said porous article in a direction opposite to the rotation of said starting member.
Claim 33
Dependent Claim
55 words
The apparatus of claim 21 further comprising means for rotating said porous article while it is simultaneously longitudinally translated, means for heating said porous article to consolidate said particulate material, means for heating the consolidated article to the drawing temperature of the materials thereof, and means for drawing said consolidated article into an optical filament.
Claim 34
Dependent Claim
18 words
The apparatus of claim 21 wherein said starting member defines a central longitudinal aperture within said starting member.
Claim 35
Dependent Claim
15 words
The apparatus of claim 32 wherein said starting member further comprises a tapered end portion.
Claim 36
Dependent Claim
27 words
The apparatus of claim 33 wherein said starting member further defines a plurality of radial orifices disposed within said tapered end portion thereof intermediate the ends thereof.
Claim 37
Dependent Claim
20 words
The apparatus of claim 34 further comprising means for rotating said starting member while said particulate material is being applied.
Claim 38
Dependent Claim
13 words
The apparatus of claim 35 further comprising means for rotating said porous article.
Claim 39
Dependent Claim
21 words
The apparatus of claim 36 further comprising means for rotating said porous article in the same direction as said starting member.
Claim 40
Dependent Claim
24 words
The apparatus of claim 36 further comprising means for rotating said porous article in the direction opposite to the rotation of said starting member.
Claim 41
Dependent Claim
17 words
The apparatus of claim 36 wherein said means for applying particulate material is a plurality of burners.
Claim 42
Dependent Claim
17 words
The apparatus of claim 39 further comprising an auxiliary heater disposed downstream from said plurality of burners.
Claim 43
Dependent Claim
18 words
The apparatus of claim 40 further comprising means for heating said porous article to consolidate said particulate material.
Claim 44
Dependent Claim
32 words
The apparatus of claim 41 further comprising means for heating the consolidated article to the drawing temperature of the materials thereof, and means for drawing said consolidated article into an optical filament.
Claim 45
Dependent Claim
28 words
The apparatus of claim 42 further comprising means for controlling the application of particulate material so as to provide a predetermined desired cross-sectional composition of said porous article.
References Cited (Backward Citations)
US3652248A
Cited
USRE28029E
Cited
US3933454A
Cited
US4062665A
Cited
US4102663A
Cited
US4198223A
Cited
US4224046A
Cited
US4230472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |