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Process and energy director for ultrasonic welding and joint produced thereby

  • US 5,401,342 A
  • Filed: 02/24/1993
  • Issued: 03/28/1995
  • Est. Priority Date: 03/04/1986
  • Status: Expired due to Term
First Claim
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1. A process for joining first and second pieces together, the second piece having first and second sides, the process comprising the following steps:

  • providing on the first piece an energy director comprising first and second ridges running substantially parallel to each other, and a groove running between the first and second ridges, wherein the first ridge has a first side adjacent the groove and a second side opposite the groove, wherein the first ridge'"'"'s first side is steeper than the first ridge'"'"'s second side;

    placing the energy director against the first side of the second piece;

    placing an ultrasonic horn against the second side of the second piece opposite the energy director; and

    applying vibrations to the horn so as to ultrasonically weld the two pieces together.

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