Abstract: The present invention relates to a 3D-printed cobalt-based alloy product comprising carbon, tungsten and chromium with very good mechanical and thermal properties as well as a method of preparing the 3D-printed product and a powder alloy. The alloy has a high carbon content leading to high carbide content but small and evenly distributed carbides. A method facilitating 3D printing of high carbide content alloys such as the present alloy is also disclosed.

Abstract: A tip unit (1) incorporated in a liquid applicator such as a ball-point pen, the tip unit being capable of an increased rate of liquid discharge with no leaking or clogging problem. To achieve it, the tip unit (1) is accommodated in a tip body (11) having a ball housing (15), a ball (10), a capillary hole (16), and a proximal bore, the ball housing (15) being a passage for allowing liquid to flow therethrough, the ball (10) being rotatively held in the ball housing (15). The ball housing (15) is provided with at least one ink channel (47) adapted to communicate the ball housing (15) with the capillary hole (16) or the proximal bore. The ball housing (15) has a ball resting seat (45) and a side wall (41) that are connected by a connecting surface (71) having a shape of a truncated conical surface with its apex toward the distal end of the tip unit (1).

Abstract: A nib for a stylus for use with a tablet and stylus computer. The nib provides a desired amount of firmness and friction between the stylus and a writing surface of the tablet and stylus computer. A nib substrate material approximates a desired nib-and-writing-surface firmness and a desired amount of friction between the nib and the writing surface. A secondary material is optionally added to the nib substrate material to alter the amount of friction between the stylus nib and the writing surface.

Abstract: A method of manufacturing the writing tip of a ball point pen which has the steps of inwardly pressing the end of a fine metallic tube at the entire periphery to form a drawn portion, drawing the inner wall of the drawn portion to form a ball holding portion, forming a slot for leading ink at the ball seat portion, inserting the ball into the ball holding portion, and allowing the ball to be held at the ball holding portion. Thus, the durability of the tube can be improved, and the design of the supply passage of ink can be freely performed without restriction in the diameter of the ball.

Abstract: A pen nib provided with a slit for liquid inks, in which the front end of the nib is at its underside provided with a ball-point tip which extends substantially perpendicular to the writing plane, and the ball bed of which is associated with the slit in the nib in an ink transmitting manner.

Abstract: Pen nibs are made by extruding rods from fused thermoplastic material, with a cavity in the rod of star-shaped cross-sectional configuration. The extruded rod is then cooled and mechanically drawn to reduce its diameter about 50%, which closes the inner ends of the arms of the star and brings them together at the center of the rod, while leaving the outer ends of the arms relatively large. The resulting product is then sharpened at both ends for use as a pen nib.