The corrugated cardboard sheet manufacturing system including a production state information acquisition device; a control value information acquisition device for acquiring control value information of a control element of a corrugated cardboard sheet manufacturing apparatus exerting an influence on the warp of a corrugated cardboard sheet; a warp information acquisition device for acquiring information of a warp amount of the corrugated cardboard sheet; a storage device for storing a performance data set including at least production state information, the control value information, and the warp information; a pre-control table storing a standard control value of the control element set in accordance with a production state; a correction table for correcting the standard control value to set an initial control value; an update device for updating the correction table by reflecting the performance data set; and control device for performing feedforward control of the control element using the initial control value.

An assembly for producing a corrugated cardboard web laminated on both sides from a laminating web and at least one corrugated cardboard web laminated on one side has a first pressing nip for guiding the at least one corrugated cardboard web laminated on one side, and at least one heating element for heating at least one corrugated cardboard web laminated on one side in the pressing nip and a second pressing nip arranged downstream of the first pressing nip for pressing the at least one corrugated cardboard web laminated on one side and the laminating web against one another. The assembly for producing a corrugated cardboard web laminated on both sides also has a laminating web guide arranged at a distance from the first pressing nip for guiding the laminating web at a distance from the first pressing nip to the second pressing nip.

A sheet heating apparatus include a first heating plate, a second heating plate, a joining member, a heating section, and a guide member. The first heating plate has a first heating surface curved in a convex shape. The second heating plate has a second heating surface curved in a convex shape. The joining member integrally joins the first heating plate and the second heating plate together such that the first heating surface and the second heating surface face outward. The heating section heats the first heating plate and the second heating plate. The guide member guides a sheet such that the sheet comes into contact with the first heating surface and the second heating surface.

A apparatus for creating corrugated cardboard (20) in particular on the site of a system for automatically forming packaging boxes, said corrugated cardboard having at least one corrugated layer (10) between two flat layers (12, 18). The apparatus includes a joining station (16) for attaching a second flat layer (18) to a corrugated layer (10) provided on a first flat layer (12), means for supplying said corrugated layer (10) with the first flat layer (12) attached thereto to said joining station (16) and means for supplying said second flat layer (18) to said joining station, means for removing a protective layer (28) from the corrugated layer (10) and/or the second flat layer (18), said protective layer (28) protecting an adhesive substance provided on the corrugated layer (10) or the second flat layer (18).

An assembly for producing a corrugated cardboard web laminated on both sides from a laminating web and at least one corrugated cardboard web laminated on one side has a first pressing nip for guiding the at least one corrugated cardboard web laminated on one side, and at least one heating element for heating at least one corrugated cardboard web laminated on one side in the pressing nip and a second pressing nip arranged downstream of the first pressing nip for pressing the at least one corrugated cardboard web laminated on one side and the laminating web against one another. The assembly for producing a corrugated cardboard web laminated on both sides also has a laminating web guide arranged at a distance from the first pressing nip for guiding the laminating web at a distance from the first pressing nip to the second pressing nip.