US3589333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for coating elongated filament with plastic
Assignee: Millennium Petrochemicals Inc
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Filing: 1967-05-02
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Granted: 1971-06-29
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Expires: 1987-05-02
Abstract
Abstract Elongated filaments, such as yarn, thread, string and rope are moved through an elongated tube having an internal diameter greater than the exterior diameter of the filament. An inlet connection to the tube is connected to a source of dry plastic powder which is blown into the inlet and the tube while the filament is moving through the tube. The power coats the filament and the filament is moved into a curing oven in which the plastic powders melt and coalesce on the filament with the plastic subsequently being cooled to produce a plastic-coated filament having good water-resistant qualities, a glaze finish and additional strength.
Inventors
- 👤 John J Quackenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:57
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/20; D; D06; D06B; D06B3/00; D06B3/04; D06B3/045; D06C; D06C23/00; B05D1/00; B05D1/18; B05D1/22; B05D1/24; D06C2700/00; D06C2700/31
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
The apparatus of claim 1, which includes a valve in said manifold between said compressor and said hopper.
Claim 2
Dependent Claim
135 words
Apparatus for coating elongated filaments with plastic, comprising a plurality of thin, elongated, hollow tubes disposed parallel to one another for receiving individual filaments; means for moving said filaments through said tubes at a predetermined speed; a plurality of conduits, each of which is connected to a central portion of each thin elongated hollow tube; a common manifold, communicating near one end with said conduits, and near its other end with an air compressor and a plastic powder supply hopper, said air compressor communicating with said manifold at a point between said conduits and said supply hopper, said manifold having a valve between said compressor and said hopper; supply means for supplying a continuous filament to one end of each hollow tube; and oven means for heating said filaments after they emerge from said tubes.
Claim 3
Dependent Claim
27 words
The apparatus as set forth in claim 1 which further includes cooling means adjacent said oven for cooling said coated filament when said filament leaves said oven.
Claim 4
Dependent Claim
38 words
The apparatus as set forth in claim 1 wherein each said conduit forms an acute angle to each said tube and injects powder into said tube, having an axial component of motion against the motion of said filament.
References Cited (Backward Citations)
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US2817310A
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US2964419A
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US3147144A
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Cited
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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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |