Browse Prior Art Database

Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal


A document handling system for maintaining uniform unbound margins on trimmed signatures in a light lens electrophotographic machine is disclosed. As it is well known, a signature-type document is a sheet typically containing four numbered pages which when folded and nested inside one another become one unit of a pamphlet or book. A result of fitting several folded pages of finite thickness to make a pamphlet or book together, the inside pages of the pamphlet or book protrude beyond the perimeter of the outside page. This shingling effect can be eliminated by a secondary trimming operation either on-line or off line by trimming. The finished pamphlet or book now has acceptable uniform edges but the images on each side of the page appear to be going toward the center of the pamphlet or book, which is unacceptable. The document handling system of the present disclosure has the capability of correcting this defect by shifting the images of each succeeding sheet toward the center-fold when going from the outside to the inside pages of the book, thus keeping the unbound margins uniform.