Patent ID: 6692208
Filing Date: 2004-02-17
Classification: B42C,B65H

Abstract:
A method of treating a booklet of sheets folded to create a curved spine, comprising the steps of:providing a booklet of folded sheets, the folded sheets having a spinal portion having a convex shaped end surface; fixedly holding the folded sheets along their length adjacent to and along the length of the spinal portion and at a predetermined lateral distance therefrom to leave a protruding portion of the sheets, the protruding portion having a predetermined width and including the spinal portion; providing a forming means; causing the forming means to pass longitudinally of the protruding portion to apply to the spinal portion from one end thereof to the other a force in the lateral direction sufficient to produce a deformation of the protruding portion, the deformation comprising a flattening of the convex shaped end surface of the spinal portion of the booklet of folded sheets.