Method and apparatus for forming grooves in sheets to make printed products

摘要

The method involves seaming output sheets (19b) to a folded sheet, where the output sheets are compiled on top of each other in such a manner that the folded area lies at the top and the folded sheet is opened downwardly. A groove line (30b) is formed in the output sheets before the folding, where the depth and the breadth of the groove line are increased around a predetermined measure. An adjusting device controlled by a control device is provided for delivering a groove wheel (34) in a passage plane (DE). An independent claim is also included for a device for processing a sheet.