Method and apparatus for the ultrasonic joining of materials according to a pattern
Abstract
Abstract A METHOD AND APPARATUS FOR THE ULTRASONIC JOINING OF MATERIALS ACCORDING TO A PATTERN, AT LEAST ONE OF WHICH CONTAINS A THERMOPLASTIC. THE ELEMENTS TO BE JOINED ARE ENGAGED BETWEEN AN ULTRASONICALLY VIBRATING MEMBER HAVING AN ELONGATED WORKING TIP AND A BACK-UP OR ANVIL MEANS HAVING A NARROW RAISED SURFACE CORRESPONDING TO THE DESIRED PATTERN. THE PATTERN IS FORMED BY MOVING THE BACKUP OR ANVIL MEANS AND THE MATERIALS CONJOINTLY RELATIVE TO THE WORKING TIP SO THAT THE MATERIALS ARE JOINED IN ACCORDANCE WITH THE PATTERN; AS SUCCESSIVE PARTS OF THE PATTERN SURFACE TRAVERSE THE WORKING TIP. THE ELONGATION OF THE WORKING TIP IS IN A DIRECTION ANGLED TO THE DIRECTION OF MOTION SO AS TO MINIMIZE THE AREA OF CONTACT AT ANY INSTANT OF TIME BETWEEN THE WORKING TIP AND THE RAISED PATTERN SURFACE.
Inventors
- 👤 Clifford A Robertson
Bibliographic Details
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