| 摘要 |
PROBLEM TO BE SOLVED: To provide a refill for a ball-point pen which can form an ink housing tube precisely without warping to eliminate troubles such as nonuniformity in thickness, deformation, and air entrainment, can reduce costs by reducing the number of parts, and can make the color of its ink be discriminated easily. SOLUTION: In the refill having the ink housing tube 20 and a chip 10, the tube 20 is composed of an approximately cylindrical primary molding part 21 in which a penetration support part 21a1 penetrating radially in an appropriate position is formed and a secondary molding part 22 which is formed in the part 21a1 and forms part of the ink housing part 20 and formed by injection double molding. |
