Patent ID: 11969933
Assignee: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A preformer configured to extrude jointly a plurality of elastomer mixes in a common direction of flow, in order to assemble the elastomer mixes into a co-extruded profiled element, the preformer comprising:
superimposed in a stacking direction, the stacking direction being a first direction transverse to the common direction of flow, a first channel configured to convey a first elastomer mix, a second channel configured to convey a second elastomer mix, the second channel being separated from the first channel by a first partition, and a third channel configured to convey a third elastomer mix, the third channel being separated from the second channel by a second partition; and
at least one stiffener which is formed integrally with the first partition and the second partition and extends to pass through at least the second channel in the stacking direction,
wherein the at least one stiffener has, at least in a cross-section of passage of the second channel, a leading edge which allows the second elastomer mix to pass around the at least one stiffener by dividing into two sub-flows, which flow, in the second channel, on both sides of the leading edge.