Patent ID: 6430801
Filing Date: 2002-08-13
Classification: A47C,Y10T

Abstract:
A method of making a shape-adjusting mechanism for a backrest, comprising:spacing a pair of supports along a predetermined axis; stamping sheet metal to produce one or more resilient axial ribs, the stamping defining in each of the one or more axial ribs a lengthwise section with relatively low bending resistance in a predetermined direction and another lengthwise section with a relatively high bending resistance in the predetermined direction, the lengthwise section and the another lengthwise section positioned such that the one or more resilient axial ribs flex to a preselected profile; fixing each of the one or more axial ribs to each of the supports such that the one or more axial ribs flex in the predetermined direction as the supports are drawn together; stamping sheet metal to define resilient transverse ribs; fixing the transverse ribs to the one or more axial ribs; connecting a mechanism to the supports which is operable to displace the supports axially relative to one another.