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US3829545A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for manufacturing polyethylene terephthalate plastic coated wire

Assignee: Bekaert NV SA
•
Filing: 1973-02-28
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Granted: 1974-08-13
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Expires: 1993-02-28
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Abstract

Abstract An improved process for manufacturing plastic coated wire is taught which comprises heating the wire to be coated to an elevated temperature, passing the heated wire through an extrusion zone maintained at an elevated temperature and pressure in which a polyester plastic in molten condition is coated on the heated wire, and cooling the plastic coated wire at a rate sufficient to maintain the plastic primarily in the amorphous state. In a preferred embodiment, a steel wire is coated with polyethylene terephthalate in which the coating is at least 80 percent amorphous and 0.1 to 0.3 mm in thickness. An improved wire product is produced which may be advantageously utilized for the manufacture of barbed wire, wire mesh, wire netting, wire fences and the like.

Inventors

  • 👤 Roger Van Vlaenderen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 14:28
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/15; B29C48/03; B29C48/05; B29C48/06; Y; Y10; Y10S; Y10S264/00; Y10S264/65; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/298

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 36 words
Process according to claim 1 in which said extrusion is carried out at a temperature in the range of about 200* to 300*C and said polyethylene terephthalate coated wire is cooled by quenching in cold water.
Claim 2
Dependent Claim 87 words
Process according to claim 1 in which an extrusion head is used which includes a nozzle through which said polyethylene terephthalate coated wire is withdrawn and a conical wedge provided with a central bore disposed within a corresponding cavity at the other end of said head, said extrusion head being adapted to feed said wire through said central bore and molten polyethylene terephthalate through a conical passageway defined by the outer surface of said wedge and the interior conical surface of said head at said other end.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-08-12 1978-02-11 1978-08-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-08-12 1982-02-11 1982-08-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-08-12 1986-02-11 1986-08-13 $7700.00 Window Closed / Lapsed

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