Abstract: Embodiments of the disclosure can include writing instruments, nibs for writing instruments, and methods of making the same. In one embodiment, the writing instrument includes a reservoir; an ink solution comprising a pigment, the ink solution being housed within the reservoir; a nib disposed at an end of the reservoir and plugging an opening of the reservoir such that the reservoir is closed, wherein a tip of the nib extends outside of the reservoir; and a filament extending within the reservoir, the filament being in fluid communication with a portion of the nib within the reservoir, such that the ink solution travels along the filament and through the nib, by capillary action, wherein the nib and filament are formed such that no more than 50 percent of the pigment present in the nib and filament flow into the reservoir outside of the nib and filament when the writing instrument is stored with the nib up for a period of one day.

Abstract: Cam faces 24a and 24b are continuously formed in a circle on upper and lower faces which are perpendicular to an axial direction of a rotatable cam 24 which constitutes a rotational drive mechanism 21. Elastic members 23b are formed integrally with a holder member 23 for rotatably supporting the rotatable cam 24 to extend in the axial direction, and the first fixed cam and second fixed cam 23c and 23d having a small number of cam faces at butts and tips of the elastic members are arranged to face each other via the upper and lower cam faces 24a and 24b of the rotatable cam 24. The rotatable cam 24 is retreated and moved forward in the axial direction by writing pressure applied to a writing lead to be rotationally driven in one direction and rotational motion of the rotatable cam 24 is transmitted to the writing lead.

Abstract: A liquid applicator adapted to prevent an application liquid from leaking or drying with a small biasing force. A tip unit for a liquid applicator of the present invention includes a tubular member and a valve member. The valve member is biased toward a distal end thereof by a biasing member so as to seal a distal opening portion of the tubular member. The distal opening portion includes a first tapered surface and a second tapered surface located at a proximal side of the first tapered surface. The first and the second tapered surfaces are in contact with a tapered area and a ring of the valve member, respectively, so as to seal the distal opening portion.

Abstract: By means of a fluid material discharge device of simple construction, a technique for fluid material discharge is provided which has few or no inadequate discharge, high productivity, and which enables easy modification and adjustment of the amount of fluid material discharge. The fluid material discharge device comprises a nozzle for discharge of fluid material and a filament-shape member inserted into the nozzle for use. The filament-shape member has a tip portion AA, which is exposed outside of the nozzle when no pressure is exerted on the tip of the filament-shape member, a portion BB which can be inserted into the nozzle, and a portion CC, on the side of the filament-shape member opposite the tip portion AA, and being bent from the portion BB. The spring structure of the filament-shape member is utilized to discharge fluid material.

Abstract: A input pen for a portable information processing terminal device with an input tip (12) biased axially forward by pressure applied thereto by a return spring (13). The pressure applied to the input tip (12) is optionally adjustable. A front barrel 10 is detachably attached to a front portion of a barrel (1). The input tip (12) is axially slidably inserted in the front barrel 10. The return spring 13 extended in the front barrel (10) applies pressure to the input tip (12) so as to bias the input tip (12) forward.

Abstract: A paint applicator system utilizing a paint reservoir which is connected to a slidable nib which permits paint to pass through the reservoir to the exterior of the nib. The paint composition is placed in the reservoir and is predetermined to possess a viscosity of between 25 and 115 centipoise by the use of selective solvents.

Abstract: A pen for applying a color liquid whose sleeve part (1) includes an outlet port (3) for the color liquid, closable by a valve. The valve comprises a spring means incorporating at least one leaf spring (6, 6') or a disk spring, and a guiding element (4) pressed by the spring means against a sphere (5) which thereby is biased towards the outflow port (3). When the pen tip is pressed against an underlying substrate, the sphere (5) assumes an open position. The leaf or disk springs (6; 6') can be made of plastics and can be produced in one piece with the guiding element (4).

Abstract: A stylo pen tip with a drop weight body (7) which is located inside an inner bore (6) of a housing (1,1') connected with the writing fliud reservoir (16) and which has a cleaning wire (8) at its front end extending into the writing tube (2) supported on the front end of the housing (1, 1') has a drop weight safety (13) supported therein which is pivotable around the longitudinal axis of the housing (1,1') and which is in interlocking contact with the drop weight body (7), which can be moved back and forth axially in a limited way in relation to it. In its forward position the drop weight body (7) adjoins with its front end (10) a stop face (9) formed in the inner bore (6). The plane of the front end (10) of the drop weight body (7) and the plane of the stop face (9) are inclined towards each other. By turning of the drop weight body ( 7) the extension of the cleaning wire (8) beyond the front end of the writing tube (2) can be adjusted.

Abstract: A drop weight for a tubular writing instrument has a drop weight body consisting of an upper and lower part (20; 22). The lower part (22) has a front support surface for supporting the drop weight body in its front position inside the tubular writing instrument, and the cleaning wire (21) is fixed to the bottom of the upper part (20). The two parts (20, 22) can be axially moved in relation to each other, by means of which the distance between the front support surface and the front end of the cleaning wire (21) can be altered. In this way the projection of the cleaning wire (21) beyond the end of the writint tube (11) can be adjusted. Further, to set the projection of a cleaning wire (103), provided at the front end of a drop weight body (115), beyond the front end of the writing tube (102) of a tubular writing instrument, a bush element (116) having a shoulder area (117), is clampingly fastened on the drop weight body (115 ).

Abstract: Tubular writing pens of the stylographic type, as used by artists and technical draftsmen. Particularly a tubular writing pen having superposed inner and outer ink pressure equalization chambers defined in the cylindrical pen body. A removable outer sleeve complementally engages the cylindrical body of the pen, to cover the outer pressure equalization chamber. A locking surface is defined in the removable sleeve rear edge, so that the sleeve may not be removed accidently with consequent ink loss and damage.

Abstract: In a tube pen tip with a writing tube (3) supported in the front end of a pen body (1) where the writing tube (3) is pivotable against a resilient pressure means in a limited way in all directions around a point located on the writing tube center axis (11) and inside of the pen body (1). The rear end of the writing tube (3) is movably braced against axial displacement by a guide surface (6) that is centrosymmetrically located in the pen body (1) on a central axis (11) of the unpivoted writing tube (3).

Abstract: An improved tubular writing pen having a writing pen body (3) and a forepart (1) joined to it that holds in a forward direction a writing tube (5). The forepart (1) is revolvable, yet is installed axially non-dislocatably in the pen body (3) and in the latter is braced against dislocatability in a rearward direction by a support surface (14). A writing fluid conductor extends into the writing tube (5). A coupler element (7) is fastened to the writing conductor and stands in contact with a bearing surface of an adjuster element (4) when raised from the drawing surface, and which is screwed into the forepart (1) and held non-rotatable with respect to the forepart.

Abstract: An improved applicator device is disclosed for applying an applicator material such as a liquid or a flowable solid to a surface. The device comprises a material container and a surface applicator for applying the applicator material to the surface. A valve having a valve element is interposed between the material container and the surface applicator to permit the flow of applicator material to the surface applicator when the valve element is in an open position and to inhibit the flow of applicator material to the surface applicator when the valve element is in a closed position. The valve includes a valve closure having an internal closure cavity with a first end being connected to the material container and with a second end defining a surface applicator opening therein. The valve element has a distal end portion which extends through the applicator opening of the valve closure when the valve element is biased into the closed position.

Abstract: In a tip of a tubular writing pen having a writing tube (2) secured in a forepart a (1) joined to a pen body and an axially movable fluid conductor (3) extending into the writing tube, of the type wherein the projecting length of a writing fluid conductor (3), beyond the forward end of the writing tube (2), is adjustable. To this end, a writing pen tip forepart (1) is non-dislocatably joined to the pen body, while a coupler element (6) is secured about a portion of the writing fluid conductor (3), inside of the forepart. As the tubular writing pen tip is raised from the drawing surface, a surface of the coupler engages against a bearing surface of an adjuster element (7, 8). The adjuster element (7, 8) is in screw-like engagement with an axially non-dislocatable actuating socket (16), so that the adjuster element axially is shifted, simply by rotating the actuating socket (16).

Abstract: A draftsman's ink writing instrument having a falling down prevention member axially and movably received in the axial through bore of the outer case. The falling down prevention member is sized and shaped so that it is resiliently biased against the inner surface of an upper, larger diameter part of the axial through bore in the outer case but will not pass downwardly beyond a tapered annular shoulder between the upper, larger diameter part of the axial through bore and a middle, smaller diameter part of the axial through bore.

Abstract: The invention relates to a writing device comprising a storage tank for Indian ink or another writing medium, a housing which is open in the direction of the tank, a tubular pen which is arranged on the housing, a needle which is axially displaceable in the tubular pen, and a drop weight member which is attached to the needle and is displaceable in the interior of the housing. The tank contains a propellant which is subjected to its own vapor pressure and acts directly on the writing medium, and the end of the tubular pen located in the interior of the housing is designed as a valve seat onto which a valve body formed on the oppositely located end of the drop weight member can be sealingly positioned.

Abstract: A writing instrument of the type having a cylindrical body (1), with a forward end that carries a writing tubule (4) and an inner bore which communicates with the writing tip. A separate sheath body (15) is adapted to be covered by a sheath element (9). The sheath body is pushed onto the rearward end of the cylindrical body (1) and defines a compensating chamber (12, 14) on each of its outer and inner faces. The compensating chambers are connected proximate their rearward ends by a connecting bore (13). The inner compensating chamber (14) communicates with the inner bore through a transverse bore (7) provided in the forward area of the cylindrical body (1). A writing fluid tank (11) is mounted by being pushed onto the rearward end of the cylindrical body (1).

Abstract: In a nib structure of a writing instrument of the type having a tubular nib fitted to a forward end of a tubular tip of the instrument, the tubular nib is provided with a concentrically reduced diameter portion having an outer surface gently sloped from the ends toward a middle portion of the nib, and a radiused peripheral edge at a rearward end of the nib. The nib structure provides easy and accurate fitting of the nib into the tubular tip.

Abstract: A writing instrument has a tubular tip and a needle longitudinally mounted within the tubular tip for enhancing the flow of ink towards a writing point of the tubular tip. The writing instrument has a mechanism which provides a smooth flow of ink without forming an air ring or bubble in the passage of the ink.

Abstract: An ink writing implement comprises a retainer for a floating weight arranged in the axial bore of a retaining box and having an annular planar surface facing a planar shoulder therein. A venting groove and capillary grooves pierce the surface and the retainer includes a spiral ink flow path along the circumference thereof. A floating weight is guided for axial movement in the axial bore of the retainer and the planar shoulder forms an abutment for a front end of the floating weight. The retainer bore is long enough to accommodate the axial movement of the floating weight and this weight defines an axially extending venting channel with the retainer. A front retainer end is cylindrically recessed and comprises a surface defining an ink flow control path in the axial bore of the retaining box, which connects the venting groove and channel with the spiral ink flow path.

Abstract: An India ink drawing implement comprises a retaining box defining an axial bore and a tubular drawing point affixed to an outer end of the retaining box for receiving India ink from the axial bore of the retaining box. A retainer for a floating weight is threadedly fastened to a threaded inner end of the retaining box. The retainer defines an axial bore in alignment with the axial bore of the retaining box and comprises an elongated tubular portion extending through the retainer box bore and a bottom closing an inner end of the retainer. A floating weight is guided for axial movement in the axial bore of the retainer and a portion of the retaining box bore. The length of the tubular retainer portion is sufficient to guide a major portion of the floating weight and the bottom of the retainer limits the stroke of the axial movement of the floating weight.

Abstract: Capillary writing pen of the type embodying a cylindrical body having an open end and a pen tip with reservoir insertable as a cartridge within the cylindrical body. Particularly the improvement consisting of providing wave like complemental surfaces at the abutting interface of the cylinder open end and cartridge tip, such that transverse twisting of the cartridge with respect to the cylinder results in axial separation of the cartridge with respect to the cylinder. The improvement eliminates the necessity for the expensive and time consuming complemental threading of the cylinder interior and cartridge exterior and is readily producible in conventional plastic dies.

Abstract: A stylus is assembled from a plastic tip having an axial bore and an ink tube in said bore centered therein and welded thereto. Ultrasonic welding is used for softening and partially melting the tip. On switching off the ultrasonic energy source, the molten portion of the tip hardens and provides a strong bond between the tip and the ink tube.

Abstract: A tubular or stylus pen of the type comprising a cylindrical body provided with an axial inner bore, having at its front end a writing tube and an outer surface defining an ink equalizing chamber, further including a casing element with a portion receivably mounted upon the cylindrical body and adapted for sealing the ink equalizing chamber, wherein the improvement comprises a tubular extension upon the cylindrical body, extending rearwardly and connecting the cylindrical body and the ink supply chamber, the tubular extension together with the casing element defining means to allow the tubular extension to be moved forward to a limited extent within said casing element to thereby expose the ink equalizing chamber on the outer surface of the cylindrical body for cleaning without a complete disassembly of the pen.