| 摘要 |
PROBLEM TO BE SOLVED: To hold constant fusing strength without generating the irregularity in the fusion strength of the ink filter fused to the end surface of an ink introducing part and to prevent the peeling or damage of the ink filter even when a porous member is brought into contact with the ink filter when the end surface of the ink introducing part is fitted in the ink supply hole of an ink cartridge. SOLUTION: At a time of the thermal fusion of an ink filter 31 to the end surface 30A of an ink introducing part 28, a region R high in fusion strength thermally bonded to the end surface 30A along the mesh direction G of weft yarns of an ink filter 31 having a will weave structure is formed by inserting the ink introducing part 28 in the ink supply hole 23 of an ink cartridge 11 to set the ink cartridge 11 to a head holder 10. At this time, the end surface 30A is thermally fused so as to be arranged at the position coinciding with the press position pressing a porous member 22 or the vicinal position partially overlap with said press position. |
