The single facer includes a load-bearing frame for housing a first corrugating roller and a second corrugating roller, meshing with each other and mounted in the load-bearing frame. The single facer further includes a pivoting structure, pivoted to the load-bearing frame about a pivoting axis and including two pivoting arms supporting two guide rollers of a continuous flexible member. Two actuators raise and lower the pivoting arms and the guide rollers. A hinge system allows to keep the pivoting structure cantilevered to replace the continuous flexible member.

An assembly comprises a device for producing a corrugated board web laminated on one side comprising a fluting device for fluting a first material web and a pressing device for pressing the glued corrugated web and a second material web against one another. The assembly comprises a first transverse position detecting device, upstream the fluting device, for detecting the first material web, a second transverse position detecting device, upstream the pressing device, for detecting the second material web and a signal processing unit, which is capable of actuating a unrolling device for unrolling the second material web so that in the device for producing a corrugated board web it is transversally displaced correspondingly.

The single facer includes a load-bearing frame and a pivoting structure pivoted to the load-bearing frame about a pivoting axis. The pivoting structure includes a first pivoting arm on a first side of the single facer and a second pivoting arm on a second side of the single facer. The pivoting structure supports two guide rollers of a continuous flexible member which applies pressure against a corrugating roller. An actuator system controls the traction and position of the continuous flexible member.

A corrugated cardboard production plant with double output side includes a corrugation unit, configured to form a composite cardboard sheet, the corrugation unit includes a corrugator and a plurality of continuous paper web storing units, and a first processing station arranged downstream of the corrugation unit along a first direction of movement of the composite cardboard. The plant also includes a second processing station arranged downstream of the corrugation unit in sequence along a second direction of movement of the composite cardboard different from the first direction of movement.

The invention relates to a method and an apparatus for the production of a corrugated cardboard product. The apparatus comprises a first one-sided machine and a second one-sided machine which are provided in each case with a press-down belt and with a first and a second grooving roller respectively. The first and the second grooving roller are designed for embossing a wave profile onto a first and a second paper web respectively. The press-down belts serve, together with the respective grooving rollers, for connecting the first and the second paper webs in each case to a non-corrugated web for the production of a first and a second single-flute corrugated cardboard web respectively. The first one-sided machine is equipped with a first oblique guide roller, the axis of rotation of which is inclined at a vertical inclination angle between side margins of the first paper web.

A method for making a dual fluted corrugated board includes providing a first single face corrugated board having a liner layer and a fluted layer attached to the liner layer and providing a second single face corrugated board having a liner layer and a fluted layer attached to the liner layer. The method also includes arranging the first single face corrugated board and the second single face corrugated board such that the fluted layers thereof face one another and attaching the first single face corrugated board to the second single face corrugated board.

A corrugated cardboard plant comprises at least one device for producing a respective corrugated cardboard web laminated on one side; a lamination web dispensing device; a lamination web printing device disposed downstream of the lamination web dispensing device; and a device, disposed downstream of the lamination web printing assembly, for producing a corrugated cardboard web laminated on two sides from the at least one corrugated cardboard web laminated on one side and from a lamination web. The at least one device for producing a respective corrugated cardboard web laminated on one side is configured and/or disposed in such a manner that the at least one corrugated cardboard web laminated on one side, at least in a manner adjacent upstream of the device for producing a corrugated cardboard web laminated on both sides, has a respective upwardly directed corrugation. The lamination web in the device for producing a corrugated cardboard web laminated on two sides is guided in such a manner that said lamination web therein runs above the at least one corrugated cardboard web laminated on one side.

An apparatus for introducing transverse trapezoidal corrugations into a traveling web is provided, and includes a plurality of corrugating rollers for imparting corrugations to the web. In disclosed embodiments four such rollers are provided in a roller train defining respective first, second and third nips therebetween, wherein the teeth of the first and second rollers have rounded distal faces and those of the third and fourth rollers have flattened distal faces. Methods of yielding a trapezoidal corrugated web also are disclosed.

The single facer includes a first feed path for feeding a first paper web towards a corrugating nip defined between a first corrugating roller and a second corrugating roller. The single facer also includes a second feed path for feeding a second paper web towards a pressure nip defined between the first corrugating roller and a pressure member co-acting with the first corrugating roller. A respective heating system is provided along each feed path. Each heating system includes at least a pair of heating plates.

An assembly comprises a device for producing a corrugated board web laminated on one side comprising a fluting device for fluting a first material web and a pressing device for pressing the glued corrugated web and a second material web against one another. The assembly comprises a first transverse position detecting device, upstream the fluting device, for detecting the first material web, a second transverse position detecting device, upstream the pressing device, for detecting the second material web and a signal processing unit, which is capable of actuating a unrolling device for unrolling the second material web so that in the device for producing a corrugated board web it is transversally displaced correspondingly.