Method of making a partially impregnated capacitor

Details Method of making a partially impregnated capacitor Method of making a partially impregnated capacitor

1975-09-15

1977-07-26

Spruill, Robert Louis

Metal working

Electric condenser making

Solid dielectric type

H01G 422

Patent

active

040372987

ABSTRACT:
A method of producing a hard roll capacitor includes winding on a core a capacitor roll using heat shrinkable synthetic resin strips some of which are metallized while maintaining tension on the strips above about 200 grams per inch of strip width per mil thickness. The roll is then subjected to temperature sufficient to shrink the strips on the roll after which the roll is placed in a casing and its ends are covered with a dielectric liquid. The process results in a capacitor with only a narrow margin section of the roll at the edges being wetted by the dielectric liquid.

REFERENCES:
patent: 3374515 (1968-03-01), Girard
patent: 3430116 (1969-02-01), Johnstone
patent: 3471098 (1969-10-01), Jannett
patent: 3854182 (1974-12-01), Forster
patent: 3906297 (1975-09-01), Hunt
patent: 3955127 (1976-05-01), Hunt

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