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: 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: An ink cartridge (1) for a reservoir pen has a body (2) which encloses an ink-chamber (3) that is initially sealed near the front end of the cartridge by a closure formed by a plug (4). The plug (4) sealingly engages in an axial bore (5) which is open to the front end of the cartridge and is slidably mounted in the cartridge body (2) so as to be moved rearwardly by engagement with a peg (34) upon insertion of the cartridge (1) into a pen, thereby allowing ink flow from the ink chamber (3) through the bore (5) and to a writing tip (23) of a nib (22) of the pen. The peg (34) is sized so as to form a seal with the inner surface of the bore (3) when fully inserted thereinto.

Abstract: A writing instrument adapted, responsive to a pressure axially applied to a pen core, to supply ink in an ink chamber to the pen core, and includes a valve seat disposed between the ink chamber and the pen core, a valve body operable to be selectively moved between a close position where the valve body is in contact with the valve seat to isolate the pen core from the ink chamber and an open position where the valve body is spaced apart from the valve seat to communicate the pen core with the ink chamber, a pressing spring for biasing the valve body toward the front end of a pen shaft, and a support member for supporting the valve body and the pressing spring to allow the valve body to be moved in the axial direction. The support member includes a communication channel for communicating the inner space thereof with the ink chamber.

Abstract: A reservoir pen includes a nib, a feed bar defining an ink channel and having an ink port, and a valve for controlling flow of ink from the ink port to an underside of the nib. The valve includes a seat, a valve member, and a resilient element engaging the valve member to bias the valve member away from the ink port toward an open position. The valve member is further positioned to engage the nib to urge the valve member against the resilient element and into sealing contact with the seat. The resilient member is disposed outside of the ink channel in at least the open position.

Abstract: A writing instrument adapted, responsive to a pressure axially applied to a pen core, to supply ink in an ink chamber to the pen core, and includes a valve seat disposed between the ink chamber and the pen core, a valve body operable to be selectively moved between a close position where the valve body is in contact with the valve seat to isolate the pen core from the ink chamber and an open position where the valve body is spaced apart from the valve seat to communicate the pen core with the ink chamber, a pressing spring for biasing the valve body toward the front end of a pen shaft, and a support member for supporting the valve body and the pressing spring to allow the valve body to be moved in the axial direction. The support member includes a communication channel for communicating the inner space thereof with the ink chamber.

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: An ink cartridge (1) for a reservoir pen has a body (2) which encloses an ink-chamber (3) that is initially sealed near the front end of the cartridge by a closure formed by a plug (4). The plug (4) sealingly engages in an axial bore (5) which is open to the front end of the cartridge and is slidably mounted in the cartridge body (2) so as to be moved reawardly by engagement with a peg (34) upon insertion of the cartridge (1) into a pen, thereby allowing ink flow from the ink chamber (3) through the bore (5) and to a writing tip (23) of a nib (22) of the pen. The peg (34) is sized so as to form a seal with the inner surface of the bore (5) when fully inserted thereinto.

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 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 reservoir pen includes a valve operated by the pen nib (4) to allow ink to pass to the nib, the ink flow rate being controlled by a flow restricting device (8) located between a primary ink reservoir chamber (2) enclosed within the pen barrel (1) and a secondary ink reservoir chamber (6) of much smaller capacity from which an ink channel (10) leads to the valve. The device (8) is a length of an extruded rod of microporous plastics. The nib is pressed towards the feed bar (3) by one spring element (21) and the valve member (12) which cooperates with a seat defined by the feed bar is urged to its closed position by another spring element (28). The rear end of the primary ink chamber (2) is closed by a grease plug comprising a mass of grease and a skeletal reinforcing frame.

Abstract: An implement for applying a liquid includes a container for holding liquid, the container having a front end which is open and a front tube mounted on the front end of the container. The front tube has a forward outlet opening. A hollow accommodating member has an interior chamber, the accommodating member having a rear opening communicating the interior chamber with the container and a forward opening communicating the interior chamber with the front tube. A liquid feed member is movably disposed in the interior chamber between a closed position in which the liquid feed member engages the forward opening to block off communication between the interior chamber and the front tube and an open position in which the liquid feed member is disengaged from the forward opening. An end valve is axially movable in the front tube between a closed position and an open position and an open position. An applicator is mounted on the end valve.

Abstract: A writing implement for generating a pair of lines which will vary in spacing depending upon the down pressure applied includes a handle, a pair of elongated blades of flexible material which are secured at one end to the handle and which project therebeyond. The blades have their minor axes intersecting at an angle of approximately 45.degree. to 135.degree., and marking elements are secured to the free ends of the blades and project therefrom with the points thereof being closely spaced in the unflexed condition of the blades. When the user applies downward pressure to the writing implement, the blades flex along their longitudinal axes, and this moves the points of the marking elements apart to generate a pair of spaced lines. Various types of marking elements may be replaceably seated in barrel portions at the free ends of the blades.

Abstract: A reservoir pen in which flow of ink from a reservoir to a nib is controlled by a valve which is actuated by the deflection of the nib during use.

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.