In one example of the disclosure, a print agent is applied upon a length of web substrate. A dryer is utilized to dry the web substrate length. Moisture is applied to the web substrate length. The moisturized web substrate length is wound upon a spool to form a top liner length, with no dryer to be utilized to dry the web substrate length between the moisture application and the winding.

A method for manufacturing a three-dimensionally deformed plate made of a wood fiber material comprises providing a prefabricated, flat wood fiber material plate as the original plate, preheating the original plate in sections, wetting the preheated section of the original plate with an atomized liquid mixture of water and a separating agent, introducing a section of the original plate that is preheated and wetted with a liquid mixture of water and a separating agent between two rollers of a molding station, wherein the rollers respectively provide a corrugated profile in the peripheral direction of the external surface, such that the original plate is being deformed in sections into a plate with a wave shape, wherein rollers are being used, the respective profiling of which has half-waves which follow one another in the peripheral direction and which at least partially have a different extension in the peripheral direction.

A heating device of a two-sided machine has a stand which has a first arcuate hot plate and a wall on which a sleeve is provided. A second arcuate hot plate is arranged above the first arcuate hot plate. The second arcuate hot plate is connected to the sleeve by a connecting stem. The stand includes a cylinder unit, the piston rod of which is connected to the trailing end of the second arcuate hot plate. A second corrugated-cardboard ply and a first corrugated-cardboard ply are guided so as to run between the hot plates, whereas a third corrugated-cardboard ply is guided so as to run, above the second arcuate hot plate, through the second arcuate hot plate. The second arcuate hot plate is lowered by the cylinder unit in order to be placed in connection with the second corrugated-cardboard ply.

A system for manufacturing a three-dimensionally deformed plate made of a wood fiber material comprises a preheating station, a wetting device, and a molding station including two rollers spaced apart for receipt of a preheated and wetted flat wood fiber material plate therebetween. The rollers respectively include an external surface including a wave-shaped profiling in the peripheral direction, wherein the respective profiling has half-waves which follow one another in the peripheral direction, and which have a different extension in the peripheral direction

The invention relates to an apparatus for producing corrugated cardboard products. Said apparatus comprises a first one-sided machine and a second one-sided machine which are configured in each case for producing a single flute corrugated cardboard web. Furthermore, the apparatus has a combining means which is configured for connecting the single flute corrugated cardboard webs. Here, the combining means is provided with a convergence region which is configured for mutual adaptation of the single flute corrugated cardboard webs. Furthermore, the invention relates to a method for producing corrugated cardboard products, in which method a first single flute corrugated cardboard web is connected to a second single flute corrugated cardboard web. During connection, a first single flute corrugated cardboard web and a second single flute corrugated cardboard web run through a convergence region.

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.

Equipment for controlling manufacture of corrugated cardboard, including: a sensor arrangement arranged to measure moisture of a liner in connection with unwinding of the liner in an unwinding part in order to control the moisture of the liner prior to gluing to a fluting on the basis of the measured moisture.

The plant for producing a corrugated board includes one or more single facers and a double facer, as well as respective unwinders for unwinding reels of paper webs. Arranged along the production line, in suitable positions, are thermographic cameras which acquire images through which it is possible to trace the various characteristics of the cardboard, for example the moisture content thereof, detect manufacturing defects, after which it is possible to intervene on one or more process parameters so as to eliminate the causes of the defects.

The plant for producing a corrugated board includes one or more single facers and a double facer, as well as respective unwinders for unwinding reels of paper webs. Arranged along the production line, in suitable positions, are thermographic cameras which acquire images through which it is possible to trace the various characteristics of the cardboard, for example the moisture content thereof, detect manufacturing defects, after which it is possible to intervene on one or more process parameters so as to eliminate the causes of the defects.