Patent ID: 10618242

Abstract:
A single facer including a first corrugating roller with a first rotation axis and a second corrugating roller with a second rotation axis. The two corrugating rollers form a corrugating nip, through which a paper sheet passes. The single facer also includes a pressing member, co-acting with the second corrugating roller and forming a pressure nip therewith, as well as a glue applicator co-acting with the second corrugating roller. With the second corrugating roller a suction box is associated, extending approximately parallel to the second rotation axis of the second corrugating roller and defining a suction area around the second corrugating roller. A series of laminar members, each of which is inserted in a respective one of the annular grooves of the second corrugating roller, are arranged between the pressing member and the first corrugating roller and extend in the respective annular grooves towards the suction box.