US4539226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed lightguide coating apparatus
Assignee: Furukawa Electric North America Inc
•
Filing: 1984-03-02
•
Granted: 1985-09-03
•
Expires: 2004-03-02
Abstract
Abstract An apparatus for applying a coating on a lightguide fiber (60). The apparatus is comprised of a container (10) having the coating die (18) in the bottom portion thereof and a plurality of separating means (26--26) therein which divides the container into an upper chamber (12), a lower chamber (16) and at least one chamber (14) intermediate to the upper and lower chambers. Each separating means (26) is sealed to the inner surface of the container (10) at the outer edge portion and has a small, centrally located aperture (28) which is vertically aligned with the apertures in the other separating means and the coating die (18). Additionally, a means is provided for directing coating material (40), under pressure, into the lower chamber (16).
Inventors
- 👤 Un C. Paek
- 👤 Charles M. Schroeder, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:14
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A method of coating a lightguide fiber, comprising the steps of: drawing the fiber through a container, filled with coating material, having at least three vertically aligned chambers therein, each chamber being sealed from the others and each having a small aperture in the lower portion thereof through which the fiber is drawn; and pressurizing the lower chamber to a pressure higher than the chambers thereabove wherein the pressure in the lower chamber causes the coating material to continuously flow upward, through the apertures in the lower portions of the chambers thereabove, and out an overflow means in the upper chamber.
Claim 2
Independent Claim
101 words
A method of coating a lightguide fiber, comprising the steps of: drawing the fiber through a container, filled with coating material, having at least three vertically aligned chambers therein, each chamber being sealed from the others and each having a small aperture in the lower portion thereof through which the fiber is drawn; and pressurizing the lower chamber to a pressure higher than the chambers thereabove wherein the pressure in the lower chamber causes the coating material to continuously flow upward, through the apertures in the lower portions of the chambers thereabove, and out an overflow means in the upper chamber.
Claim 3
Independent Claim
112 words
An apparatus for coating a lightguide fiber, which comprises: a container, having a coating die in the bottom portion thereof, and a plurality of separating means therein which divides the container into an upper chamber, a lower chamber and at least one chamber intermediate to the upper and lower chambers, said chambers being adapted to contain coating material therein; each separating means is sealed to the inner surface of the container at the outer edge portion and has a small, centrally located aperture which is vertically aligned with the apertures in the other separating means and the coating die; and a means for directing coating material, under pressure, into the lower chamber.
Claim 4
Independent Claim
112 words
An apparatus for coating a lightguide fiber, which comprises: a container, having a coating die in the bottom portion thereof, and a plurality of separating means therein which divides the container into an upper chamber, a lower chamber and at least one chamber intermediate to the upper and lower chambers, said chambers being adapted to contain coating material therein; each separating means is sealed to the inner surface of the container at the outer edge portion and has a small, centrally located aperture which is vertically aligned with the apertures in the other separating means and the coating die; and a means for directing coating material, under pressure, into the lower chamber.
Claim 5
Dependent Claim
21 words
The apparatus as set forth in claim 2, wherein: each separating means is conically shaped with the aperture at its apex.
Claim 6
Dependent Claim
22 words
The apparatus as set forth in claim 2, wherein: the upper chamber is adapted to permit the coating material to overflow therefrom.
References Cited (Backward Citations)
US3473511A
Cited
GB2048726A
Cited
US4349587A
Cited
US4374161A
Cited
US4409263A
Cited
US4439467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |