| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a toner conveyance pipe of a three-dimensional complex shape excellent in dimensional accuracy and airtightness, and to provide a method for manufacturing the same. <P>SOLUTION: The toner conveyance pipe of a gooseneck shape used in an image forming apparatus is a joining of a pipe body having a semitubular part along the lengthwise direction of the pipe in at least one location and at least one semitubular cover joined to the semitubular part, wherein the junctions of the pipe body and the semitubular cover are ultrasonically welded. The pipe body and the semitubular cover are formed by injection molding in such shapes that the joint surfaces of the pipe body and the semitubular cover are made nearly planar. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
