Abstract: A method for the preformation of a cushion for a seat, characterized by feeding an aggregate of three-dimensional curled short-fiber filaments to conveyor means, causing said conveyor carring thereon said aggregate of filament to be advanced under a rotary member provided on the outer surface thereof with a multiplicity of raised needles and kept in rotation and allowing said needles to come into contact with said aggregate of filaments thereby scraping part of the filaments from said aggregate and giving to said aggregate of filaments a prescribed shape.

Abstract: An air conditioner for a vehicular seat, comprising a seat formed of a support frame and an air-pervious cushioning member resting on said support frame and provided within said cushioning member with an electric heater and in the lower part of said cushioning member with air supply means serving to pass air to said air-pervious cushioning member, an air conditioner, an air duct interconnecting said air conditioner and said air supply means, means for feeding electric power to said electric heater until the temperature of said cushioning member of said seat reaches a first preset level, and valve means capable of closing said air duct when the temperature of said cushioning member reaches a second preset level higher than said first preset level and opening said air duct when the temperature of said cushioning member falls below said second preset level.

Abstract: A cushioning material, comprising a lower filament cushioning layer of relatively high rigidity and high perviousness to air obtained by compression molding in a stated shape three-dimensional curled short fibers of polyester filaments of a relatively large denier number thereby producing a shaped mass of filaments and applying adhesive agent to the shaped mass thereby binding the points of mutual contact of filaments therein and an upper filament cushioning layer of relatively low rigidity obtained by compression molding in a stated shape three-dimensionally curled short fibers of polyester filaments of a smaller denier number than said polyester filaments thereby producing a shaped mass of filaments and applying adhesive agent to the shaped mass thereby binding the points of mutual contact of filaments therein, with said upper layer superposed on said lower layer.

Abstract: A method for the manufacture of a cushioning material comprising the steps of compressing three-dimensionally crimped short synthetic filaments to form a shaped mass of filaments, applying an adhesive agent to the resultant shaped mass of filaments, then heating the shaped mass thereby drying the adhesive agent adhering to said short filaments and uniting adjacent filaments at the points of their mutual contact, and pressing the resultant crude cushioning material in the presence of steam thereby compressing the crude cushioning material.

Abstract: A method for the manufacture of a locked material of filaments, which comprises compression molding in a prescribed shape short fibers of three-dimensionally crimped synthetic filaments, applying an adhesive liquid to the shaped article of filaments thus obtained, then lifting the shaped article in a substantially vertical direction and, at the same time, subjecting it to dielectric heating and thereby drying the adhesive adhering to the shaped article.

Abstract: A polyurethane cushion material comprising incorporating fiber filament in a foamed polyurethane, and it is produced by crimping the fiber filament, setting it under heating, producing a staple fiber, filling the staple fiber thus formed with a polyurethane into a mold, forming the polyurethane and post-curing it to complete polycondensation.

Abstract: A polyurethane cushion material comprising incorporating a large denier of a fiber filament in a foamed polyurethane, and it is produced by crimping the fiber filament, setting it under heating, producing a staple fiber, filling the staple fiber thus formed with a polyurethane into a mold, forming the polyurethane and post-curing it to complete polycondensation.

Abstract: A three-dimensioned crimp filament is prepared by twisting a bundle of large denier filaments into a single twist while said filaments are stretched between a freely-rotatable first roller with a peripheral groove having 10-500 mm of diameter at a grooved portion and at least one other freely-rotatable second roller in a total denier of 50,000-3,000,000 denier by means of twisting action in a subsequent double twist step, double twisting said single-twisted filaments into a double twist up to said first roller and heating the filaments thus twisted into a double twist while passing them through a tubular guide means, cooling said double-twisted filaments to effect a heat-set while maintaining the twisting action; untwisting said double-twisted filaments thus heat-set to form three-dimensioned crimp filaments, and cutting said untwisted three-dimensioned crimp filaments into stable lengths.

Abstract: A cushioning material composed of a drafted three-diamentionally crimped filament mass of a synthetic fiber by bonding contact points between each of the filament with an adhesive, wherein the filament crimped in various shapes formed by partially expanding and compressing the filament crimps at required specific portions in the cushioning material with directionality in required specific directions are distributed with partially increased density in the degree of entanglement.

Abstract: An apparatus for manufacturing a three-dimensioned crimp filament comprising: a drive means for pulling filaments; a group of guide rollers arranged in a reverse U-shaped roller group, said roller group being provided ahead of said drive means and adapted to be rotated about a longitudinal axis such as to give forward and rearward portions of a plurality of filaments while stretched with a single twist formed thereon and being transferred by said drive means mutually opposite twisting actions; a pair of rotative rollers each provided with a groove, said roller pair being provided immediately after the roller at the forward end in said roller group and provided with a non-slip means for pulling the single twisted forward portion of said filaments at a transfer speed such that the filaments of said forward portion form into a double twist and are cooled sufficiently to effect a thermal set; a heating means provided ahead of said roller group and serving to heat the filaments formed with a double twist; a single

Abstract: A method of manufacturing an insulated gate field effect transistor (hereinafter referred to as IGFET) of metal-insulating film-semiconductor construction in which a predetermined amount of impurity is introduced into the insulating film to produce immobile charges to thereby control the carrier concentration in the surface of the semiconductor and alter the conductivity type. A method developed from the above one for making an IGFET in which a transistor of depletion mode is coupled as a load with a transistor of enhancement mode.