Method of manufacturing insulated electric wire of the enamelled-wire type by extrusion
US4145474A · kind A · utility
19Cited by
6References
9Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 29, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Jun 29, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2938
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of extruding a thin sheath of plastic material about electric wire, utilizing a plastic material capable of being shaped by extrusion after having been heated in a screw extruder, this material exhibiting the technical characteristics required for enamel-type insulation after cooling, without necessitating subsequent treatment. An extrusion material containing at least one partially crystalline thermoplastic polycondensate wherein the crystallites have a melting-point above 170.degree. C. answers these requirements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.