| 摘要 |
880,778. Reservoir pens. TALLON Ltd. Dec. 3, 1957 [Oct. 1, 1957], No. 30681/57. Class 146(3) [Also in Group XXII] A nib 12 for a ball-point pen has a base seat 16 for the ball 19 and an inturned lip 20 for retaining the ball on the seat 16, and one or more tubular ink passages 15 are provided below the base seat bearing surface leading from the control ink duct 14 to the side of the ball, the base seat 16 being a continuous part spherical surface. In manufacture, the nib 12, Fig. 2, is formed with a central ink duct 14 and a ball cavity 11, the floor 13 of the cavity being either flat, concaveconical, or convex-conical, and then a series of grooves 15 are made which extend downwardly from the floor 13 and outwardly of the duct 14. A tool with a spherical end, or the writing ball 19, is then pressed into the floor 13 to displace the material around the end of the duct 14 to form a concave base seating 16, Fig. 6. The edges of the grooves 15 close on each other in the positions located at the seating 16, and ducts or tubular passages 15 are formed each of which communicates between the duct 14 and a side position in the cavity 11, and lies beneath the seating 16 where a tool has been used, it is removed and replaced by the ball 19, and the lip 20 of the tip is inturned to retain the ball and complete the ball housing. In a modified method for forming the seating 16 a swaging tool is placed in the cavity 11 and rotated, or the blank is rotated, so that one edge of each radial groove 15 is pressed against the other edge. |
