Manufacture of oriented insulated wires and cables
US4533417A · kind A · utility
2Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1984 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Jul 12, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/3462
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of making insulated wires or cables in which a tube of crystallizable polymeric material is first extruded over size on the wire, cooled until it can be gripped and then reheated and stretched to produce crystalline orientation and to collapse it into contact with the wire is distinguished by first holding the tube at a temperature between its glass transition temperature and its crystalline melting point long enough for the degree of crystallinity to be significantly increased. Physical properties after orientation are considerably improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.