Abstract: A writing instrument includes a shell, an ink reservoir disposed in the shell and a writing tip section that is provided on the shell from which ink from the ink reservoir is applied to a substrate. The writing tip section includes a writing tip and an ink feed assembly for delivering ink from the ink reservoir to the writing tip through capillary action. The writing tip is flexible and a flexible cover with the shape of a fountain pen nib is provided for supporting the flexible writing tip.

Abstract: A nib piece with high roundness is obtained in the following manner: in the forming of the nib piece, a punched hole is formed in a base portion of a punched plate which is to be bent; the base portion of the punched plate is bent and shaped into a tubular structure; a pipe member which is aligned with and accommodated in the tubular body, is disposed in an inner portion of the base portion of the punched plate having been bent; and the punched plate is shaped to obtain a structure to wrap an outer periphery of the pipe member. The punched plate includes an engageable joint portion, such as a protrusion and a recess, which engage each other and form a hooked edge when the punched plate is bent into a cylindrical form.

Abstract: The two-side writing fountain pen of the present invention comprises an ink output means and a holding means which is provided for fastening the ink output means, and said ink output means includes a pen nib member and a feed member. The pen nib member includes a pen nib flake and a pen tip granulation element formed at the tip of the pen nib flake, wherein the pen tip granulation element is formed with a pen tip front contact section, a pen tip back contact section and an ink output passage communicating with the pen tip front contact section and the pen tip back contact section, and then the pen nib flake is provided with an ink guiding passage communicating with the ink output passage. The feed member includes an ink input section and an ink output section, said ink input section is provided within the holding means, and the ink output section connects with the ink guiding passage of the pen nib flake.

Abstract: A nib of a writing instrument is made of a carbon-resin mixture obtained by mixing a plastic material with carbon fiber. An ink feed core is provided with a nib cover. The nib cover is disposed on an outer periphery of the ink feed core between the nib and the ink feed core. The nib cover is configured to closely adhere at least to an inner periphery of the nib at the tip of the nib. A space defined between the nib and the ink feed core is filled up with the nib cover. The nib is made of a carbon-resin mixture obtained by mixing a plastic material with carbon fiber. With this configuration, a nib having high wear resistance can be obtained and duration of the nib and the writing instrument can be prolonged.

Abstract: A highly durable conical nib is provided which also realizes a significant improvement in a nib productivity and a significant cost reduction. The conical nib comprises: a plurality of separated combtooth pieces being able to converge progressively toward front ends thereof and combine to form a virtually conical shape and that the front ends thereof combine to form a virtually spherical shape; a holding member capable of arranging the combtooth pieces along a circumference; and a converging member capable of converging these combtooth pieces; wherein the plurality of separated combtooth pieces are assembled by the holding member and the converging member, both separate from the combtooth pieces, into a conical nib having a writing tip at the front end thereof and an ink feeding path between each combtooth piece.

Abstract: A highly durable conical nib is provided which also realizes a significant improvement in a nib productivity and a significant cost reduction. The conical nib comprises: a plurality of separated combtooth pieces being able to converge progressively toward front ends thereof and combine to form a virtually conical shape and that the front ends thereof combine to form a virtually spherical shape; a holding member capable of arranging the combtooth pieces along a circumference; and a converging member capable of converging these combtooth pieces; wherein the plurality of separated combtooth pieces are assembled by the holding member and the converging member, both separate from the combtooth pieces, into a conical nib having a writing tip at the front end thereof and an ink feeding path between each combtooth piece.

Abstract: A writing instrument comprising a pen point receiver, a pen point and an ink introducing core member. The tip end portion of the pen point is formed to curve downwardly towards the tip end writing portion with respect to the base end portion of the pen point.

Abstract: A penpoint has a base portion and a plurality of comb-tooth pieces and a converging member fitted over the portion of the penpoint body between the base portion and the comb-tooth pieces. The uniform pressure of the converging member converges the comb-tooth pieces front ends into an undistorted hemispheric writing portion having ink passages between the adjoining comb-tooth pieces. When the penpoint is pressed against paper with the pen axis inclined, the front ends of the comb-tooth pieces shift and elastically deform to expand the outer diameter of the hemispheric portion. When pressure is relieved it returns to its original hemispherical shape. The thickness of strokes varies according to writing pressure. The penpoint can write in any direction.

Abstract: A dynamic feather ink pen enables a user to enjoy all the benefits of the historic form of writing without the disadvantages. The pen includes a grip having an opening extending longitudinally through the grip. A feather having a stem extends through the grip and engages a nib. The stem is slidably engaged within the grip. A portion of the nib is frictionally positioned within the grip, and includes a tip for engaging a writing surface. The stem, the nib and the grip form a reservoir into which an ink filament is positioned.

Abstract: A conical penpoint is disclosed which resiliently deflects at its end by the pressure of writing to allow the thickness of written lines to be varied easily. The conical penpoint comprises: a penpoint body having a cylindrical base portion and a conical portion formed of a plurality of comb-tooth pieces continuous to and extending forwardly from the base portion; and an ink supply core installed inside the penpoint body and extending longitudinally therein. The front ends of the comb-tooth pieces are joined together so that the front ends of the adjacent comb-tooth pieces are in resilient contact with each other. When the apex portion formed by the joined front ends of the comb-tooth pieces is pressed against paper with its axis at an angle with respect to the paper, the penpoint elastically deforms allowing the thickness of written lines to be varied.

Abstract: A writing implement of the present invention is capable of stably feeding ink to the tip of a writing member so that the writing member is able to draw lines in a fixed width and in a fixed ink density. The writing member is formed by superposing thin strips so as to form an ink passage of the shape of a minute gap therebetween. The ink is fed to the tip of the writing member by capillarity of the ink passage. Thus, the ink can be always stably fed to the tip of the writing member regardless of changes of the environment.

Abstract: A penpoint assembly includes a penpoint which is made of a metal plate cut off at both side edges to form a taper toward the writing tip. A slit is provided extending from the front end of the writing tip to the vicinity of the rear end of the writing tip along the center line of the penpoint. The penpoint is bent at the writing tip to form small bent projections at both sides of the slit, the bent portion surrounding a small space. An ink guide core extends under the slit and communicates at the tapered portion of the ink guide core with the slit. A support member supports the ink guide core and penpoint. A writing instrument includes the penpoint assembly, the support member being integrally formed with an ink flow regulating portion, so that ink in an ink storage member in the rear portion of a penholder is guided to the writing tip through the ink guide core.

Abstract: A pen point for writing with an ink, having a pen nib with two nib points separated by a slit. The surfaces of the nib points perpendicular to the slit have, over a part of their length, a film chemically inert to the ink and wettable thereby, thus forming two lips which substantially cover the slit and abut with one another when the nib is in an unflexed state. The lips extend substantially from the slit origin to the nib tips and consist of a varnish, a plastic material or a metal. The pen point is manufactured by a process wherein a pen nib having two nib points and a slit therebetween is coated with a continuous film of material, chemically inert to the ink and wettable thereby, with the film then being divided to form the two lips.

Abstract: A fountain pen in which the resiliency of the pen tip is continuously variable. The pen tip and core are surrounded at their mounting end by a pen core cover. A guide slot is formed in a guide portion of the cover in which is positioned a flexible tongue-shaped retaining member which arches from the slot towards the pen point. A knob extends from the mounting portion of the retaining member into a spiral groove in the inner surface of a rotatable cylindrical adjustment sleeve. Rotation of the sleeve moves the retaining member in and out to thereby adjust the resiliency of the tip.

Abstract: A tubular nib having a beak-shaped section at one end of a tube, a slit formed in the beak-shaped section, and a slit-widening inhibiting section having a radius of curvature larger than that of the tubular part of the tubular nib at least at the section across the innermost end of the slit in the beak-shaped part of the tubular nib.