Spinnerets for producing multi-segment filaments

Claim 1

A spinneret for producing multi-segment filaments, comprising: a spinneret plate having at least one spinning orifice extending through the front surface of the spinneret plate and communicating with the front end of a conduit in the spinneret plate, the rear end of the conduit being open to the rear surface of the spinneret plate; a distributing block superposed on the rear surface of the spinneret plate, the distributing block having a front surface sealingly contacting the rear surface of the spinneret plate, the front surface of the distributing block having a branched duct formed therein and a plurality of reservoirs communicating with the outer ends of the branched duct, said branched duct comprising at least three duct branches of smaller width than the width of the rear end of the conduit and which are open along one side thereof to the rear end of the conduit, said duct branches intersecting in the central portion of the crosssection of the conduit and extending radially therefrom along the front surface of the distributing block and to and beyond the peripheral wall of the conduit, thereby to define at least three separate zones at the rear surface of said spinneret plate, each zone being defined by two of said duct branches and the peripheral wall of the conduit; said distributing block also having formed therein feed passage means comprising at least three small holes arranged so that each of said zones has at least one hole communicating therewith, said holes extending axially of said conduit and extending through the front surface of the distributing block at locations inside the peripheral wall of the rear end of the conduit and between said radial duct branches; the rear surface of the spinneret plate and the front surface of the distributor block being in sealed contact with each oTher in the regions between the duct branches and in the region surrounding the conduit so that spinning materials can enter the rear end of the conduit only through said small holes and said duct branches; and means for supplying a first spinning material to said holes and means for applying a second spinning material to said reservoirs.