| abstract |
The invention refers to a method of forming over the edge of a plastic jacket against a workpiece using vibratory energy. Specifically, the workpiece and jacket are disposed on a resiliently mounted anvil. As the jacket forms over and shortens its axial length, the anvil is displaced to provide a decreasing engagement force between the jacket and the horn of the vibratory apparatus. As a result, the jacket is free of scars or distortions in the region of forming. |