Patent ID: 9708150
Date: 2017-07-18
CPC Classifications: B31B,B41F,B65H

Claim:
1. An apparatus for folding print sheets, comprising: at least one first guide element defining a guide plane in which the print sheet is made available in a folding position; at least two folding rollers, arranged on a first side of the guide plane and respectively provided with one rotational axis wherein a folding gap is defined between the at least two folding rollers for the print sheet to be folded, wherein the rotational axes are oriented parallel to each other and essentially parallel to the guide plane; a compressed air source; a control unit; a compressed air device, arranged essentially parallel to the rotational axes of the folding rollers on a second side of the guide plane which is essentially arranged opposite the first side of the guide plane, in a region of the folding gap, wherein the compressed air device is connected to the compressed air source and to the control unit, and includes at least one exit opening for the compressed air that is focused onto the folding gap; and control elements connected to the compressed air source and to the control unit, wherein the control elements are activateable by the control unit, so that (1) the time interval during which the at least one exit opening is admitted with the compressed air, (2) the cross-sectional surface of the at least one exit opening, and (3) the pressure of the compressed air supplied to the at least one exit opening are changeable to adapt to properties of the available print sheet.