| 摘要 |
PURPOSE:To impart excellent ink flow stability, drain-back resistance and abrasion resistance by opening a slit having capillary force to the point-of-brush part provided back to back with the internal insertion hole of an ink introducing core in specific length in the axial line direction. CONSTITUTION:A pen point part 1 and a cylindrical insertion part 2 are molded in an integral structure using a polyester type liquid crystal polymer appropriately mixed with a Teflon powder, silica or alumina. A slit 5 having capillary force is opened to the point-of-brush part 4 provided back to back with the internal insertion hole 3 of the pen point part 1 in a length of 0.2 - 0.8mm in the axial line direction. By this constitution, all of ink flow stability, drain- back resistance, abrasion resistance and writing pressure strength, that is, rigidity are improved. |
