Patent US3619231A successfully refreshed from Google Patents.
US3619231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous metal coating process with fusible pulverulent materials
Assignee: ANCHOR FENCE Inc A CORP OF MD
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Filing: 1969-06-16
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Granted: 1971-11-09
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Expires: 1989-06-16
Abstract
Abstract A method and apparatus for the coating of running strands on webs with a thermoplastic protective layer. The successive steps comprise the application of a primer and the air current drying and curing of same using inductive heating. While still hot, the strand or web is passed axially through a dense cylindrical bed of a powdered thermoplastic. This bed is constantly being cooled and replenished by recycling using air currents and directional jets. Vinyl polymer, epoxy-polyamide, and polyolefins such as polyethylene or polypropylene containing metals, metal oxides, metal hydroxides and metal carboxyl groups are proposed as coating materials.
Inventors
- 👤 William B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:39
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/22; B05D1/24; B05D3/00; B05D3/02; B05D3/0254; B05D3/0281; B05D7/00; B05D7/20; B05D2451/00; B05D7/50; B05D7/52; B05D7/54; B05D7/542
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
The process of claim 1 wherein the primer of said primer coating is thermosetting material and said fusible plastic powder is vinyl polymer.
Claim 2
Dependent Claim
35 words
The process of claim 1 wherein the primer of said primer coating is a weak acid solution of a base metal higher in the electromotive series than iron and said fusible plastic powder is polyolefin.
Claim 3
Dependent Claim
24 words
The process of claim 3 wherein said polyolefin contains a cross-linking agent for cross-linking with the surface of said metallic wire during said fusing.
Claim 4
Dependent Claim
11 words
The process of claim 3 wherein said polyolefin contains powdered metal.
Claim 5
Dependent Claim
71 words
The process of claim 1 wherein steps in the process are carried out in the sequence recited in said process continuously, with substantial quantities of the fusible plastic powder being continuously removed from one edge of the compacted, unaerated mass adjacent and passing coated wire, aerated in an area spaced from said passing coated wire, returned to another edge of the compacted, unaerated mass adjacent said passing coated wire, and recompacted.
Claim 6
Dependent Claim
98 words
A process for coating an article with plastic material, comprising: a. priming the article with a heat curable primer; b. internally heating the primed article while simultaneously exposing the article to air having therein fusible plastic powder, thereby through the heating simultaneously curing the primer and fusing a relatively small quantity of fusible plastic powder onto the primed article; c. further internally heating the and simultaneously fusing thereon a much greater quantity of fusible plastic powder relative to the first said quantity by continuously passing the article through a cooled, compacted, unaerated mass of said fusible plastic powder.
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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) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |