Ultrasonic energy directing attachment of plastic parts to one another
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 30, 2000
Issued Date -
N/A
app pub date -
Jan 19, 1999
filing date -
May 22, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Two plastic pieces such as a handle and a container are welded together using an ultrasonic horn. Protrusions serving as energy directors are arranged on one piece in a substantially circular array, in a starburst design. A hole or cavity is formed at a central axis of the circular array so that the amount of energy concentrating at inner ends of the energy directors will not create a burned spot or a hole in the container. The ultrasonic energy at the inner ends of the protrusions is concentrated at the smaller inner area defined by the inner ends of the protrusions to first melt inner ends of the protrusions and then the entire protrusions.
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