Patent ID: 7226518
Filing Date: 2007-06-05
Classification: D04H,Y10T

Abstract:
1. Method for manufacturing a composite sheet having a multiaxial fibrous reinforcement, comprising the steps which involve: forming a unidirectional lap of reinforcing threads, at least 50% by weight of which are co-blended threads comprising reinforcing filaments and filaments of an organic material which are intimately mixed, giving said lap a cohesion allowing it to be lapped, depositing said lap on a support in movement in a transverse direction in relation to the direction of movement, wherein the depositing is made in an alternating movement with a given amplitude and the lap being overturned at each change in direction in the alternating movement, heating the reinforcing-thread/organic-material assembly, which is displaced in the direction of movement, and setting the assembly by the action of heat, if appropriate by applying pressure, then cooling the assembly in order to form a composite band, and collecting said band in the form of one or more composite sheets.