Snecma Propulsion Solide

Societe Nationale D'etude Et De Construction De Moteurs D'aviation-snecma

Bernard Lecerf

Jean-Michel Guirman

Dominique Coupe

Pierre Olry

Alain Memphis

After yarns or tows () have been pre-spread and placed side by side substantially in a common plane, their surface is swept by at least one jet of air () displaced transversely relative to the longitudinal direction of the yarns or tows so as to obtain a substantially unidirectional sheet () that is uniform.

Method and device for producing a textile web by spreading tows

To make an annular fiber structure, a strip-shaped fabric (,), is used which is made up of two superposed unidirectional sheets, with the directions of the sheets forming opposite angles relative to the longitudinal direction of the strip, the two sheets being bonded together so as to form deformable elementary meshes, the fabric being wound while being deformed so as to transform it into a flat helix, the elementary meshes deforming in such a manner that variation in mass per unit area between the inside and outside diameters of the turns remains small, and the flat turns are pressed against one another.

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Gradignan, France

Bernard Lecerf