| 摘要 |
PROBLEM TO BE SOLVED: To obtain a ball-point pen which can be produced simply without largely changing the production process of a conventional direct charge type ball-point pen and without largely increasing production costs and makes a residual amount of writing ink in a shaft cylinder clearly visible from the outside. SOLUTION: A transparent polypropylene tube is fitted to a fixing part formed in the transparent shaft cylinder. The writing ink is charged in the transparent tube. The rear end part of a chip holder fitted with a ball-point pen chip freely rotatably holding a ball as a writing tip part is fitted into the tube. The rear end part of the chip holder is held by the tip part of the shaft cylinder. |
