Method of making electroweldable sockets
US4797993A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1987 |
| Grant date | Jan 17, 1989 |
| Priority date | — |
| Expiry date | Jul 17, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/477
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to electroweldable sockets. Previously the predominant method of manufacture has been by injection molding which while producing a socket of acceptable quality it is expensive and relatively slow. The objective of the invention is to provide an alternative method of manufacture that is relatively inexpensive and relatively quick and yet does not sacrifice quality, which objective is met by a method comprising winding a length of electrical resistance wire (10) on to a transversely-split bobbin-type mandrel (2), leaving the ends (11) of the wire upstanding from the body part of the mandrel, passing the mandrel through the head (6) of an extrusion plastic processing machine to deposit plastic material (17) around the body part of the mandrel between the flanged ends, and to leave exposed the ends of the wire passing through the wall of the socket exposed, and removing the split mandrel from within the socket after it has emerged from the extrusion head, leaving the winding of resistance wire embedded in the surface of the bore of the socket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.