The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1987
Filed:
Mar. 14, 1985
Bernhard Lodder, Hardenberg, NL;
Hans Overeijnder, Hardenberg, NL;
Jan P van Dongeren, Bergentheim, NL;
Wavin B.V., Zwolle, NL;
Abstract
An electroweldable socket comprising a conducting wire or gauze near the inner wall of the socket, the socket being manufactured by feeding conducting metal wire or gauze to a transverse extrusion head of an extruder and cutting the pipe extruded from the extruder to a socket length. Conducting wire may be fed to the extrusion head after having been wound to a helical spiral, the helical spiral may also be formed in the extrusion head or supplied accommodated in an outer groove of a thin walled tube having a helically extending outer groove. The wire may also be supplied as a hose assembled from said wires. Gauze is supplied in a pipe form obtained from a strip. The wire may comprise sections of helical spirals of mutally different pitch. Windings or groups of windings may be short-circuited. The socket is provided with connections for connecting to an electrical source if a conducting wire is present. A device for manufacturing the socket comprises an extruder with a transverse extrusion head and an orifice for supplying conducting wire or gauze to the extrusion head.