Fiber application head with roller with rigid rings

A fiber application head for producing composite material parts, comprising a compacting system comprising a compacting roller for applying one or more fibers onto an application surface, said compacting roller comprising a rigid central tube by means of which said roller is rotatably mounted on a support structure of the head, and at least one cylindrical piece made of an elastically deformable flexible material, coaxially assembled on said central tube, and wherein said compacting roller further comprises a plurality of independent rigid rings, stacked side by side, in contact by their lateral surfaces, coaxially on the cylindrical piece, each having an outer cylindrical surface by which each ring is intended to come to bear against the application surface, two collars mounted on the central tube, on either side of the cylindrical piece, being able to block in translation the stack of rings on the cylindrical piece, and to hold the rings against each other by their lateral surfaces, each collar having an annular peripheral rib by means of which the collar bears against the lateral surface of the outer ring of the stack of rings, said rib defining a recess into which the cylindrical piece is able to extend when said cylindrical piece collapses under the effect of the compacting force.