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. 30, 2025
Filed:
Feb. 25, 2020
Compagnie Generale Des Etablissements Michelin, Clermont-Ferrand, FR;
Bruno Dussardier, Clermont-Ferrand, FR;
Aurelien Tournebize, Clermont-Ferrand, FR;
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand, FR;
Abstract
A mixing and extrusion machine () for the manufacture of rubber mixtures has a mixer with a converging conical twin screw () with a fixed frame () that supports sleeves (). Two screws (), being mounted at an angle, are mounted in the mixer () so as to move in translational movement between an opening () arranged upstream and an outlet () arranged downstream of the sleeves, so that the thread tips of each screw contact tangentially the surfaces of the opposite screw so that the screws remain substantially in contact with each other when the screws rotate at an angle and at a center distance that facilitates self-cleaning. The screw threads maintain tangential contact with the inner surfaces of the sleeves, thus preventing the retention of mixing material on these surfaces.