Abstract: Improved process for producing a complex elastic molded structure of the sandwich type, consisting of a core of polyurethane foam (10) surrounded by a skin, of which at least a part is reinforced with a reinforcing textile sheet (5, 6) impregnated with a thermosetting resin adhering to said foam, which process consists in:firstly depositing on one of the faces (4) of a mold intended to be closed by a cover (2) an assembly comprising a stiffening element (12) and a semirigid reinforcing textile sheet (6), preimpregnated with a solventless, non-tacky epoxy resin,then closing the cover (2) of the mold (1) so as to define, together with said assembly, a volume corresponding to the volume of the core which is to be formed;then injecting into the volume thus defined the reactional mixture forming the polyurethane foam,and finally allowing the product to cool and opening the mold (1) to withdraw the resulting elastic complex molded structure.

Abstract: A racket body formed of composite materials in which the shaft portion of the handle, two branches of a throat portion and a frame portion, which can be completed by a bridging portion, adjoin in end to end relationship and have cores and sheaths composed of different materials. The sheaths are comprised of fiber webs or braids impregnated with synthetic resin, the fibers differing along the length of the racket from at least one portion to another, while the orientations of the fibers with respect to the axes of the respective cores can differ from place to place as well. The end portions of thetwo branches of the throat are axially offset from one another so as to avoid the formation of a rupture zone.