Patent ID: 7793815
Filing Date: 2010-09-14
Classification: B23K,B29C,B29L

Abstract:
1. An ultrasonic bonding system comprising: an anvil and a horn arranged facing the anvil to ultrasonically bond a gripped portion of two or more layers of material, the gripped portion of the layers including an inner region and an outer region, and at least one of the anvil and the horn comprising a plurality of medial protrusions arranged to apply a gripping force to the inner region and a plurality of outer protrusions arranged to apply a gripping force to the outer region that is less than the gripping force applied to the inner region of the gripped material, each of the medial protrusions and the outer protrusions having a circular truncated cone shape, the outer protrusions forming an outer periphery about the medial protrusions, with spaces between tip ends of adjacent peripheral ones of the outer protrusions being larger than spaces between tip ends of adjacent ones of the medial protrusions as viewed in a direction of the gripping force and as measured in directions parallel to each other.