Patent ID: 6662422
Filing Date: 2003-12-16
Classification: B21D,B60N,Y10T

Abstract:
A process for attaching a headrest guide tube to a seat frame, structure comprising the steps of:forming a tube-receiving opening in a seat frame structure; forming a pair of annular radially extending notches which extend axially through the seat frame on opposed, peripheral sides of the tube-receiving opening; inserting a guide tube, having a wall formed of a ductile metal, into the tube-receiving opening; then axially compressing the guide tube to radially expand the guide tube wall to simultaneously form a pair of annular enlargements on opposite side of the tube-receiving opening; each annular enlargement having a diameter greater than the diameter of the tube-receiving opening; and subsequently continuing compressing the guide tube to crush the annular enlargements and simultaneously expand the guide tube into said pair of annular notches to retain holding the headrest guide tube in a fixed axial and rotational relationship with respect to the seat frame structure.