Method of manufacturing electrical capacitors and the electrical

Details Method of manufacturing electrical capacitors and the electrical Method of manufacturing electrical capacitors and the electrical

1975-04-25

1976-05-04

Goldberg, E. A.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

29 2542, 242 561, 317260, H01G 414

Patent

active

039551270

ABSTRACT:
In the method of manufacturing capacitors, elongated thermpolastic dielectric film having a conductive coating associated therewith is wound on a mandrel. Thereafter, heat is applied to the winding to shrink the thermoplastic material to tighten it. This method had been improved by depositing moisture or volatile material to the film during winding thereof to act as a lubricant between the successive layers of the film. Preferably, the electric component is heated at atmospheric pressure so that the lubricant will evaporate slowly to remain within the winding during heat shrinking to provide lubrication between the successive layers of the film. Thereafter, the components are heated in a vacuum to evaporate all remaining lubricant. Preferably the heat shrinking takes place immediately after the lubricant is deposited on the film before it has evaporated from the winding and before it has corroded the conductive coating.

REFERENCES:
patent: 3221226 (1965-11-01), Kennedy

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