| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an airtight pressure vessel which has both sufficient pressure resistance and excellent airtightness and its manufacturing method using polypropylene resin known as a resin especially-difficult to be applied, without involving any problem on appearance through ultrasonic welding method. <P>SOLUTION: On a cylindrical cover body 3 of this airtight pressure vessel 1, there is formed a rising portion 3d with its length being a distance in which top plate thickness of the cylindrical cover body 3 is deducted from a distance between aperture end surface 2a of a cylindrical housing 2 after ultrasonic welding and horn weld contact surface 3e during ultrasonic welding. <P>COPYRIGHT: (C)2012,JPO&INPIT |
