Patent ID: 9650224
Date: 2017-05-16
CPC Classifications: B31B,B65H

Claim:
1. An apparatus for folding of a print sheet, comprising: at least one first guide element defining a guide plane in which the print sheet is made available; at least two folding rollers, arranged on a first side of the guide plane and respectively provided with one rotational axis, the rotational axes being oriented parallel to each other and substantially parallel to the guide plane, wherein a folding gap is defined between the at least two folding rollers for the print sheet to be folded when the print sheet is in a folding position over the folding gap; a compressed air source; a control unit; and a compressed air device arranged in a region of the folding gap on a second side of the guide plane opposite the first side of the guide plane and essentially parallel to the rotational axes of the folding rollers, wherein the compressed air device includes at least two segments respectively connected with the compressed air source and the control unit, each segment has at least one exit opening with a cross-sectional surface for the compressed air focused onto the folding gap, each segment has at least one control element coupled to the control unit, and each segment is configured to be separately activated with compressed air; wherein the at least one control element of each segment of the compressed air device comprises at least one of: at least one first control element for changing a time interval during which the at least one exit opening is admitted with compressed air, at least one second control element for changing the cross-sectional surface of the at least one exit opening, and at least one third control element for changing the pressure of the compressed air supplied to the at least one exit opening.