Patent US4156044A successfully refreshed from Google Patents.
US4156044A
Expired / Lapsed
US
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Methods and apparatus for coating a filament
Assignee: AT&T Inc
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Filing: 1977-12-15
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Granted: 1979-05-22
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Expires: 1997-12-15
Abstract
Abstract A glass fiber is drawn through a rotating body of flowable coating material to apply the material thereon and then is further drawn through a throat section of an open ended cage formed by a plurality of wire strands forming a hyperboloid of rotation. As the glass fiber is drawn through the throat section the previously applied flowable material contacts the wire strands causing a vortex of material which centers the fiber in the throat and distributes the material uniformly and concentrically thereon.
Inventors
- 👤 Jaroslav Mracek
- 👤 Un-Chul Paek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:26
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/10; C03C25/12; C03C25/20; D; D06; D06B; D06B1/00; D06B1/10; Y; Y10; Y10S; Y10S118/00; Y10S118/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A method for uniformly and concentrically distributing previously applied flowable material on a continuous filament having a circular cross section, comprising the steps of: forming a vortex of the material by guiding the material along a plurality of spaced straight line skewed strands; and drawing the filament through the center of the vortex, in spaced relation to the strands and in contact with the material, to uniformly and concentrically distribute the material thereon.
Claim 2
Independent Claim
73 words
A method for uniformly and concentrically distributing previously applied flowable material on a continuous filament having a circular cross section, comprising the steps of: forming a vortex of the material by guiding the material along a plurality of spaced straight line skewed strands; and drawing the filament through the center of the vortex, in spaced relation to the strands and in contact with the material, to uniformly and concentrically distribute the material thereon.
Claim 3
Dependent Claim
27 words
The method as claimed in claim 1, wherein the filament is centered in a throat section of the vortex by the motion of the flowable material therein.
Claim 4
Dependent Claim
52 words
Apparatus for distributing a previously applied flowable material on a continuous filament having a circular cross section comprising: means for forming a vortex of the material by guiding the material along a plurality of spaced, straight line skewed strands; and means for drawing the filament through the central portion of the vortex.
Claim 5
Dependent Claim
52 words
Apparatus for distributing a previously applied flowable material on a continuous filament having a circular cross section comprising: means for forming a vortex of the material by guiding the material along a plurality of spaced, straight line skewed strands; and means for drawing the filament through the central portion of the vortex.
Claim 6
Dependent Claim
82 words
The apparatus as set forth in claim 3, wherein the vortex forming means is a distribution cage which is comprised of: a pair of spaced and aligned top and bottom plates, each plate having a central aperture therein; and a plurality of spaced strand sections connecting the top and bottom plates, and which upon rotation of one of the spaced plates relative to the other spaced plate said strand sections individually form a straight line and collectively define a hyperboloid of rotation.
Claim 7
Dependent Claim
35 words
The distribution cage as set forth in claim 4 wherein the top and bottom plates have radial slots therein to provide radial access to the central portion of the distribution cage by the continuous filament.
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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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |