Second fold roller with variable gap control

Abstract

A second fold roller assembly is provided. The assembly includes a pair of second fold rollers, each supported on a support element, the pair of second fold rollers forming a nip therebetween for transporting a book, the pair of second fold rollers being separated by a gap at the nip. The assembly also includes one or more actuators coupled to the support elements and a controller coupled to the one or more actuators. The controller controls the one or more actuators to vary a size of the gap, wherein the size of the gap is controlled to be a first size when a leading edge of the book enters the nip and the size of the gap is controlled to be a second size after the leading edge of the book has exited the nip and while a portion of the book is in the nip, the second size being greater than the first size.

Dependencies are inferred from the claim text.