| 摘要 |
PROBLEM TO BE SOLVED: To ensure that an appropriate consumption of ink complying with a handwriting width can be obtained, whatever width of the pen point may be, and cut the manufacturing cost of a mold, in a direct liquid-type writing utensil group consisting of a plurality of direct liquid-type writing utensils equipped with pen points of the same type and different handwriting widths. SOLUTION: Each direct liquid-type writing utensil of the group comprises an ink holding member 3 equipped with an ink holding part 31 which temporarily holds an overflowing ink in compliance with a soaring pressure inside an ink tank 41. In addition, an air replacement hole 42 with a capillary force which enables an ink and an air between the ink holding part 31 and an ink tank 41, is formed at the rear end of the ink holding member 3. Further, the ink holding part 31 is common to the ink holding members 3, and the capillary force of the air replacement hole 42 in the ink holding member 3 equipped with a pen point 2 of a large handwriting width, is set lower than the capillary force of the air replacement hole 42 in the ink holding member 3 equipped with a pen point of a small handwriting width. COPYRIGHT: (C)2006,JPO&NCIPI
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