The present invention concerns a method for producing a corrugated pasta sheet, facilitating the adherence of the sauce to the surface, in which the pasta sheet is obtained by forcibly extruding the dough through a slot in a die plate, comprising the stages during which at least one surface of the sheet is crimped repeatedly using at least one raised arm-type flexible, elasticized blade whose free end comes into contact with the sheet. The blade is inflected reciprocally by the dragging action exerted on it by the sheet as it passes through the slot and by the returning action produced by its elastic properties. An apparatus putting into operation the method described above also forms part of the invention.

A spinneret assembly is disclosed that comprises thin individual spinnerets simultaneously exhibiting a great mechanical resistance to pressure and a great number of orifices, in which: the relation between the total piercing area and the total surface of the assembly is between 35% and 90%; the relation between the total number of orifices and the total surface of the assembly is between 0.2 and 25 orifices per mm.sup.2 ; and the relation between the total surface of orifices and the surface of the assembly is between 0.5% and 40%; the spinneret assembly comprising a rigid supporting plate pierced with holes designed for the passage of the spinning material, every hole being coaxially associated with an individual spinneret and having at least one portion the cross sectional area of which is less than that of the surface of the respective spinneret.