Patent ID: 6922895
Filing Date: 2005-08-02
Classification: B21F,B68G,Y10T

Abstract:
1. An apparatus for the production of a pocketed coil spring having a predetermined spring profile, said apparatus comprising: a coiling section in which the coil spring is formed from wire fed to the coiling section, said coiling section comprising a wire feed by which wire is drawn through said coiling section, a first coiling element which controls a diameter of the coil spring, a second coiling element which controls a pitch of the coil spring, a first drive by which first positions or first orientations of the first coiling element can be altered, a second drive by which second positions or second orientations of the second coiling element can be altered, an encapsulation section in which the coil spring is inserted between juxtaposed sheets of material and in which the sheets of material are joined together to form a pocket enclosing the coil spring, and a programmable control system operably linked to said first and second drives to alter the first positions or the first orientations of said first coiling element and the second positions or the second orientations of said second coiling element relative to the wire feed, said programmable control system comprising a plurality of stored data arrays or tables, each data array or table determines a plurality of the first positions or a plurality of the first orientations of said first coiling element and a plurality of the second positions or a plurality of the second orientations of said second coiling element for a particular coil spring profile.