| abstract |
<P>PROBLEM TO BE SOLVED: To weld and join two members forming an ink flow passage by laser light irradiation, while securing ink sealability. <P>SOLUTION: A flow passage forming member H1600 is formed of a laser light transmitting resin material, while a tank holder H1500 is formed of a non laser light transmitting resin material. The flow passage forming member H1600 has a taper-shaped section H1610 hindering advancing of laser light, above a joining surface H1508, and in its vicinity, a laser light refraction surface H1620 is formed which refracts laser light and makes it reach an area overlapping with the taper-shaped section H1610 in the joining surface H1508. <P>COPYRIGHT: (C)2007,JPO&INPIT |