Abstract: A process for producing a diaphragm for a speaker of fully carbonaceous materials which has the steps of mixing carbon powder in an organic binder carbonized after calcining, kneading the composition to uniformly mix and disperse, preliminarily molding it in a sheet shape, molding the preliminarily molded material in a diaphragm shape, insolubilizing, infusibilizing the mixture and calcining the mixture in an inert atmosphere, wherein the composition contains a titanate coupling agent. Thus, a rigid bonding strength is provided in the boundary between the organic binder and the carbon powder in the green state of the composition, and the mixture is calcined to industrially simply and inexpensively produce a diaphragm having a high hardness, a high elasticity, a high strength, a light weight, an adequately large internal loss (and thus less deformation by an external force) small distortion of sound, wide reproducing sound range, distinct sound quality and adapted for a digital audio.

Abstract: A process for preparation of a carbon fiber composite reinforced carbonaceous material characterized in that using carbon fibers or the raw material fibers of the carbon fibers as the base material, the surfaces of said base material fibers even to the surface of the single fiber are uniformly and completely coated with dormant mesophase pitch and/or isotropic pitch, and after said base material has been molded, the resulting product is subjected to carbonization treatment or graphitization treatment.

Abstract: A process for preparing a wholly carbonaceous integrated diaphragm for acoustic equipment use comprises blending under application of high shearing force a mixture of one or more kinds of organic high polymeric substances carbonizable on baking and powder of graphite with crystals high elastic modulus developed therein; extrusion-molding the uniformly blended and dispersed mixture through a profile extrusion die to give a core material with orientation along the direction of the extrusion and to be cut to a desired form; independently blending and sheeting under application of high shearing force the mixture with the organic powder oriented to high degree parallel to the direction of the surface of the sheet and further passing the sheet through a calendering roll to give a skin material in the form of a film or sheet; bonding said skin material on both sides of the core material by the use of such organic liquid composition that provides high yield of carbon residue on baking and then baking the resulting un

Abstract: A diaphragm for acoustic equipment wherein a surface-hardened layer of SiC film is formed on the surface of the diaphragm substrate comprising a completely carbonaceous film. Thus, the diaphragm for acoustic equipment having superior acoustic characteristics by utilizing the superior physical characteristics of carbon can be used effectively as a diaphragm for digital-audio equipment which are now very popular.

Abstract: A valve unit for liquid applicators for applying liquid to articles, includes a spring support provided with a front and a rear openings, in an inner surface of which front opening is provided an annular projection serving as a sealing means; a valve seat provided with a cylindrical portion, and a seat portion; a valve stem provided with an edged piston portion brought into a slidable close contact with the cylindrical portion of the valve seat, the valve stem being seated on the valve seat at a front surface of the edged piston portion thereof; and a valve spring so resiliently urging the valve stem as to seat valve stem on the valve seat to close said valve unit.

Abstract: A removable cap attached to a writing instrument in an insertion manner for preventing ink from evaporating from the writing instrument, includes: a hollow cylindrical cap main body provided with a trunk portion in which at least one ventilating hole is provided and a hollow cylindrical inner cap fixedly mounted in the cap main body. The cap having been detached from the writing instrument permits open air to axially flow through the interior space of the cap through a front axial opening of the cap ventilating holes in the inner cap a space defined between the inner cap and the cap main body and a ventilating hole formed in the peripheral wall of the cap main body at a position under the pocket clip of the marking pen.

Abstract: A liquid coating instrument in which a coating liquid storage part or reservoir is provided in a shaft cylinder, a coating member is provided at the top of the shaft cylinder and a valve means is provided between the coating liquid storage part and the coating member. A chamber is provided between the valve and the coating liquid storage part. A means is provided that interrupts the communication between the chamber and the coating liquid storage part when knocking occurs and the chamber then comes into communication with the coating member, interrupting the communication between the chamber and the coating member when knocking is over and the chamber again communicates with the coating liquid storage part. Thus, only a maximum volume of the coating liquid, that is stored in the chamber, can be supplied to the coating member.

Abstract: An outer shaft of an applicator axially slidably receives an inner shaft, which is axially moved through a push-out operation thereof; and the inner shaft is provided a valve unit, an opening/closing operation of which is interlocked with such push-out operation of the inner shaft, which valve unit is connected with an application-liquid intake conduit fixed to an inside of the outer shaft; in a front end portion of the outer shaft is mounted an application-liquid applying member to which is fed the application-liquid such as an ink, a nail polish and like liquids having passed through the valve unit and the application-liquid intake conduit. A clearance is provided between a front end of the valve stem of the valve unit and the rear end of the application-liquid intake conduit, and a spring means is provided between the liquid intake conduit and the outer main shaft to compensate for undesired looseness.

Abstract: A knock-out type mechanical pencil which comprises a lead containing tube in which the inner and outer walls thereof are so tapered that the lead inlet thereof is larger in diameter than the opposite end thereof. The mechanical pencil further comprises a spring supporting ring interposed between the clamping ring so attached to the outer periphery of a chuck portion integrally formed with the lead guide of the lead containing tube and spiral springs to oppose with the base end of the ferrule within the outer barrel for urging the spring supporting ring to the ferrule. Thus, this mechanical pencil can eliminate the lead jams in the lead containing tube and lead breakage therein.

Abstract: A fluid application tool having a gap provided between the rear end of an immersion substance temporarily storing applied fluid to be supplied to application material and the edge of a fluid exit of an immersion substance support abutted on the immersion substance by forming convexes on the front edge portion of the immersion substance support surrounding the exit.

Abstract: A removable cap attached to a writing instrument in an insertion manner for preventing ink from evaporating from the writing instrument, comprises: a partially double-walled cylindrical cap main body having its opposite axial ends opened and its rear portion double-walled to form an inner cylindrical wall and an outer cylindrical wall, the inner cylindrical wall being provided with a plurality of axial slits defining a plurality of axial lands therebetween; and a cylindrical inner cap for hermetically covering a pen-point portion of the writing instrument, the cylindrical inner cap having its front axial end opened and its rear axial end closed, the cylindrical inner cap being supported by the axial lands of the inner cylindrical wall of the cap main body so as to leave rear-end portions of the axial slits of the inner cylindrical wall of the cap main body open, through which rear-end portions of the axial slits the interior of the cap main body communicates with open air.

Abstract: A removable cap attached to a writing instrument in an insertion manner for preventing ink from evaporating from the writing instrument, comprises: a hollow cylindrical cap main body; and a hollow cylindrical inner cap fixedly mounted in the cap main body. The cap having been detached from the writing instrument permits open air to axially flow through the interior space of the cap through: a front axial opening of the cap; a ventilating hole of the inner cap; a space defined between the inner cap and the cap main body; and a clearance defined between a rear-end opening of the cap main body and a rear-end projecting portion of the inner cap, which projecting portion is disposed in the rear-end opening of the cap main body while space apart therefrom, whereby there is no fear that the cap suffocates infant's bronchi even if the infant swallows the cap whole.

Abstract: A hair cosmetics coating tool comprising a main cylindrical body, a storage part of a liquid hair cosmetic provided in said main cylindrical body, a brush provided at the top of the main cylindrical body, small holes for supplying the liquid hair cosmetics from the storage part to the brush and a comb body provided adjacent to the brush, while bristle root holes of the brush and the small holes being communicated with each other totally through slits.

Abstract: A brush tip of a liquid applicator is provided with a predetermined thickness flange at its rear end, which flange is provided with a plurality a multiplicity of predetermined length projections at its rear surface, which projections are easily elastically deformable and disposed in a position opposite to that of a fibrous part of the brush tip. A method for producing such bruch tip of the liquid applicator is characterized by the use of a heating platen provided with a plurality of small holes at its front surface, in which small holes is inserted a part of a rear end portion of the brush tip and metled to form a plurality of projections while the remaining rear end portion of the brush tip is melted to form a flange.