Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Generale Des Establissements Michelin

Clement Dubois

Stephane Ravat

Frédéric Pialot

Christophe Bessac

Thierry Ducros

Michel Deboeuf

Patrick Marchal

Olivier Fuchs

The cutting system is configured to cut a continuous strip which extends lengthwise in a longitudinal direction and widthwise between a first edge and a second edge into strips. The cutting system includes a drive device which imparts to the continuous strip a feed speed, a first cutting roller and a contrarotating second cutting roller that cooperate to cut the continuous strip across its full width. The first cutting roller is provided with a first helical blade and is driven in rotation A variable synchronizer makes it possible to select and to modify the synchronization ratio between the rotational speed of the first cutting roller and the non-zero forward speed of the continuous strip in such a way as to be able to adjust the cutting angle according to which the cross-section of the continuous strip is oriented with respect to the longitudinal direction of the continuous strip.

System for cutting strips using helical knives and corresponding cutting method

The method includes the step of running a cutting means between two threads of the reinforcing ply. The method proceeds with the steps of measuring; a discrepancy between an actual cutting line (A'B&#x2032;C&#x2032;) and a theoretical cutting line (ABC) is measured and determining a point of intersection of the actual cutting line (B&#x2032;) with a reference longitudinal line (XX&#x2032;) placed on the strip. The actual cutting line (B&#x2032;C&#x2032;) of that part of the rubber profiled elements that are not superposed with the reinforcing ply is longitudinally offset (Z) with respect to the theoretical cutting line (BC) so that the actual cutting line (B&#x2032;C&#x2032;) meets the reference longitudinal line (XX&#x2032;) at the point of intersection (B&#x2032;) of the reinforcing ply (A&#x2032;B&#x2032;) with the reference longitudinal line (XX&#x2032;). The rubber profiled elements that are not superposed with the reinforcing ply are cut along the said actual cutting line.

Method for cutting a strip of tire reinforcing product comprising wires at an angle to the longitudinal direction of the product

Device for transferring a reinforcing ply having the overall shape of a parallelogram and containing reinforcing threads with ferromagnetic properties and making a given angle b, smaller than 90&#xb0;, with the longitudinal direction of the said reinforcing ply, comprising at least two transfer belts which overlap over a given lengthand are separated by a given and small-sized distance, each of the belts comprising a magnetized region of trapezoidal shape, the bases of which are parallel to the longitudinal direction of the belts and are intended to hold the reinforcing ply firmly against the moving surface of the said transfer belts, characterized in that, in the region of overlap of the belts, the side of the trapezium connecting the two bases of the magnetized region of the first belt forms an angle awith the longitudinal direction which is smaller than the angle of the threads b, and the side of the trapezium connecting the two bases of the magnetized region of the second belt forms an angle awith the longitudinal direction which is larger than the angle of the threads b, and in that the magnetized regions of the two belts do not overlap, so as to form a non-magnetized region positioned in line with the region of overlap of the transfer belts.

Belt for transferring plies containing metal reinforcements

Growing community of inventors

Clermont-Ferrand, France

Clement Dubois