| 摘要 |
PCT No. PCT/JP81/00066 Sec. 371 Date Mar. 19, 1982 Sec. 102(e) Date Mar. 19, 1982 PCT Filed Mar. 26, 1982 PCT Pub. No. WO82/03360 PCT Pub. Date Oct. 14, 1982.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.
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