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:
Dec. 28, 2004
Filed:
Aug. 24, 2000
Didier Calvar, Beaumont, FR;
Serge Nicolas, Clermont-Ferrand, FR;
Daniel Bardy, Clermont-Ferrand, FR;
Compagnie Generle des Etablissements Michelin-Michelin & Cie, Clermont-Ferrand Cedex, FR;
Abstract
A tire having a tread consisting of two circumferential layers of non-conductive material, each layer containing a circumferential insert made of a conductive mix and having on the contact surface between the two layers a circumferential footprint, the first of these layers having on the said surface a circumferential footprint with a circular path of width e, the second layer having on the said surface a circumferential footprint of width e′ lying across and having crests on either side of the circular path of the first layer, such that circumferentially between the two paths there are numerous points of contact which ensure electrical connection between the two conductive elements. The second layer with its insert is extruded from a main extruder for the extrusion of the portion of a tread in the unvulcanized condition, and a micro-extruder whose extrusion nozzle is fitted with a cutting edge and whose extrusion orifice is directed against a conveyor associated with the main extruder.