Plastic Containing Assembly Having Filler Material Arrangement for Welding

A plastic containing assembly comprising:

• a container including a containing member having an internal space, a front reduced section formed with the containing member, and a shoulder between a front end of the containing member and the reduced section;
• and
• a hollow, externally threaded adaptor including an outer protrusion configured to put on the reduced section, an inner projection adapted to insert into both the front end of the containing member and the reduced section, a groove on an outer surface of the projection, a filler member between the groove and the protrusion, and an axial passage communicating with an open front end of the adaptor and the projection respectively;
• wherein an ultrasonic welding machine applies high-frequency ultrasonic acoustic vibrations to the filler member and melts same to join the shoulder, thereby forming a first joining layer;
• and
• wherein the ultrasonic welding machine applies high-frequency ultrasonic acoustic vibrations to melt a joining portion of the reduced section and the protrusion, thereby forming a second joining layer.