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.

The invention relates to a corrugated cardboard plant for producing corrugated cardboard. The corrugated cardboard plant comprises at least one device for producing a respective corrugated cardboard web laminated on one side from a respective cover web and a respective material web; a lamination web dispensing device for dispensing a lamination web; a lamination web printing assembly, disposed downstream of the lamination web dispensing device, for imprinting the lamination web; 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 the lamination web.

A moisture resistant poultry box having a composite structure with a fluted paper medium, a top backing board assembly secured to one side of the fluted medium and a bottom backing board assembly secured to the other side of the fluted medium. The backing board assemblies and the fluted medium are impregnated with a hydrogenated triglyceride, and each backing board assembly has PET film glued thereto covering an outside surface to provide moisture resistant recyclable poultry box so that it has a Cobb value ranging between about 0 to about 1.

A releasable pair of dual nested corrugated sheets comprises a top liner, a bottom liner and a combined web. The combined web comprises a first material coupled to a second material without an adhesive. The combined web further comprises a plurality of corrugations. The top liner is partially coupled to the combined web using an adhesive. The bottom liner is partially coupled to the combined web using an adhesive. The pair of dual nested corrugated sheets is releasable such that the top liner and the first material is separate from the bottom liner and the second material.

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 means of making a multi ply structural panel by eliminating the top liner in the corrugating process. The present invention is made possible through modification to the corrugating rolls of the singlefacer. The design modification to the rolls involves incorporation of slots that run around the circumference of one roll and mating creasing tools incorporated around the circumference of the other of the corrugated roll set. These slots and creasing tools are incorporated across the existing flutes of the corrugating rolls.

There is provided a corrugated sheet processing apparatus (120) comprising: sheet processing equipment comprising at least feed and guide rollers for selecting, moving and supporting sheets or webs to a corrugator (136) for forming a corrugated sheet from which corrugated products (146) can be cut, at least one layer of the corrugated sheet, and thus products, being formed from a printed sheet or web; and a control system for controlling the sheet processing equipment (136) or a cutter (148); the sheet processing apparatus (136) further comprising a visual inspection unit (162) arranged for reading printed information markers provided on at least one printed sheet or web as the printed sheet or web, and thus the printed information markers to be read, pass through the corrugated sheet processing apparatus (136), or corrugator, past the visual inspection unit (162); and wherein the control system further has a data look-up table comprising either a) for the products, at least information associated with the form or type of at least one of the sheets or webs to be used in the corrugated sheet for those products (146), and associated with that information specific identifier information readable from the printed information markers by the visual inspection unit (162), whereby the apparatus (120) can identify what products will be produced downstream of the visual inspection unit, and the required settings for the sheet processing equipment or corrugator for those products, from a read printed information marker so that the sheet processing equipment or corrugator can be appropriately controlled by the control system in response to the read printed information marker, or b) at least information associated with the products (146) to be cut from the corrugated sheet, including cutter settings for the at least one cutting apparatus for those products, and associated with those settings specific identifier information readable from the printed information markers by the visual inspection unit, whereby the apparatus (120) can identify required cutter settings for the cutting apparatus (148) for the read printed information markers so that the cutting apparatus can be appropriately controlled by the control system in response to a read printed information marker to provide a change in the cutter requirements.

A corrugated pizza box is made using a web fed rotary die cutter with the web produced by a corrugator singlefacer that is speed synchronized with the rotary die cutter. The singlefacer produces SemiCorr Singleface Board (SSB) made possible by special corrugating rolls that allow a bottom liner to be bonded to a fluted and creased medium or liner within the singlefacer. This medium or liner has cross flute bond lines that provide in-line stiffness to the two-ply board exiting the singlefacer.

A corrugated pizza box is made using a web fed rotary die cutter with the web produced by a corrugator singlefacer that is speed synchronized with the rotary die cutter. The singlefacer produces SemiCorr Singleface Board (SSB) made possible by special corrugating rolls that allow a bottom liner to be bonded to a fluted and creased medium or liner within the singlefacer. This medium or liner has cross flute bond lines that provide in-line stiffness to the two-ply board exiting the singlefacer.

A fibrous mat having high modulus reinforcing fibers can be used to make a corrugated paper. The corrugated paper can be used to make a honeycomb paper. Methods of making the honeycomb paper are discussed as well.