Capacitance controlling process

Details Capacitance controlling process Capacitance controlling process

2007-11-27

2007-11-27

Kuhns, Allan R. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

C264S040300, C264S046900, C264S101000, C264S102000

Reexamination Certificate

active

10478535

ABSTRACT:
Process for controlling the capacitance value (C1) of a tubular sheath (1) formed by extrusion of an insulation compound (2) on an electrical cable (3) in an extrusion head (4),a foaming agent (FA) being introduced in the insulation compound (2) in such a way as to improve the capacitance value (C1) of the tubular insulation sheath (1),this process being characterised in that:a predetermined amount of foaming agent (200) is used in such a way as to obtain a predetermined capacitance value (C1) for the tubular insulation sheath (1), andin order to control precisely the capacitance value (C1) of the tubular insulation sheath (1), a gas pressure (110) is applied on at least a portion of a face (100, 101) of the insulation compound (2) extruded by the extrusion head is (4),the value of the gas pressure (110) is changed in such a way as to control the capacitance value (C1) of the tubular insulation sheath (1).

REFERENCES:
patent: 3681510 (1972-08-01), Lemieux
patent: 3972970 (1976-08-01), Taylor
patent: 4278624 (1981-07-01), Kornylak
patent: 4585603 (1986-04-01), Furuta et al.
patent: 5900198 (1999-05-01), Hori
patent: 6613983 (2003-09-01), Shukushima et al.
patent: 2 130 763 (1984-06-01), None
patent: A 5-20944 (1993-01-01), None

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