R.r. Donnelley & Sons

Stephen M Purduski

James L Warmus

A John Michaelis

A method for folding demand printed webs into signatures for gathering by rotary gathering and binding machines, as well as the signatures produced thereby, are disclosed. The method involves the steps of digitally printing pages onto a moving web of material, creating a series of fan folds across the transverse axis of the web, severing the web after a desired number of fan folds have been created to form a separate log, and chop folding the resulting log zero one or more times to form a signature. The resulting signature includes a plurality of layers each having pages printed thereon in proper orientation and sequence and includes a sturdy closed backbone which enables the signature to be easily handled by conventional high-speed rotary gathering machines.

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Naperville, IL, United States of America

Stephen M Purduski