An apparatus for production of a two-ply paperboard panel is provided. The apparatus comprises a supply of top paperboard panel web. A flap-cutting die cut module receives the top paperboard panel web and cuts a pattern of flaps therein. A flap-forming die roll in juxtaposition with a flap-receiving pocket roll defines an interface therebetween through which the top paperboard panel web is received. An adhesive-application station applies adhesive to surfaces of flaps formed on the top paperboard panel web. A supply of bottom paperboard panel web is provided, which is joined to the top paperboard panel web at a web-merging station. A hold-down system holds the top and bottom paperboard panel webs together while applied adhesive sets or cures. A method for producing a two-ply paperboard panel is also disclosed.

An embossing system including: an embossing unit with at least one embossing roller arranged to emboss a web of paper intended to be joined with a further web by gluing; and a gluing unit associated with the embossing unit, with a tank containing the glue used to perform the gluing and a glue dispensing device including a cliche roller adapted to distribute by contact the glue contained in the tank on one of the webs while the embossing is performed, the cliche roller rotating with a pre-fixed angular velocity around an axis parallel to said at least one embossing roller. The system further includes: a sensor to produce electrical signals having amplitude and/or frequency related to the vibrations at which the cliche roll is instantaneously subject.

A method for dielectrically heating foamable composition to foam and set the composition is described. In particular, radio frequency (RF) heating is used to heat the foamable composition to provide insulation in the manufacture of an article.

A method for dielectrically heating foamable composition to foam and set the composition is described. In particular, radio frequency (RF) heating is used to heat the foamable composition to provide insulation in the manufacture of an article.

Products having improved ply bonding, moldability and drape and methods for making those products are described. The methods comprise producing a multi-ply adhesively bonded product comprising a pattern of uniformly spaced microembossed elements with a bond area of less than about 0.020 inches/sq. inch.

Products having improved ply bonding, moldability and drape and methods for making those products are described. The methods comprise producing a multi-ply adhesively bonded product comprising a pattern of uniformly spaced microembossed elements with a bond area of less than about 0.020 inches/sq. inch.

The disclosed embodiments relate to an insulative protective packaging material constructed using recyclable paper materials. The packaging material includes one or more plies of paper adhered to each other. The one or more plies can have protrusions that form gas pockets. The gas pockets can be sealed by another ply to provide shock absorbency and insulation. Further, the plies can be used in multiple ways such as by nesting the protrusions of one ply into the recessed of another ply, layering multiple plies on top of each other, or individually. Each ply can be substantially flat or have protrusions. The protrusions can be made in various ways such as alternating the directions that they extend and varying the shapes of the protrusions. The resulting packaging material can be used as a shipping container or as liners within shipping containers.

A method for producing a cardboard strip for packaging from a first plurality of cardboard sheets for packaging which are cyclically united to one another. The method includes providing a first plurality of cardboard sheets each having a first perimeter portion extending along a first flank of the cardboard sheet and a second perimeter portion extending along the second flank of the cardboard sheet and further includes reducing the thickness of first perimeter portion and the second perimeter portion of a given cardboard sheet. The given cardboard sheet and another cardboard sheet are approximated to one another, so that the second perimeter portion of the given cardboard sheet and the first perimeter portion of the other cardboard sheet, of reduced thickness from a preceding cycle, are mutually superposed. The second perimeter portion of the given cardboard sheet and the first perimeter portion of the other cardboard sheet are affixed to one another.

A method for producing a cardboard strip for packaging from a first plurality of cardboard sheets for packaging which are cyclically united to one another. The method includes providing a first plurality of cardboard sheets each having a first perimeter portion extending along a first flank of the cardboard sheet and a second perimeter portion extending along the second flank of the cardboard sheet and further includes reducing the thickness of first perimeter portion and the second perimeter portion of a given cardboard sheet. The given cardboard sheet and another cardboard sheet are approximated to one another, so that the second perimeter portion of the given cardboard sheet and the first perimeter portion of the other cardboard sheet, of reduced thickness from a preceding cycle, are mutually superposed. The second perimeter portion of the given cardboard sheet and the first perimeter portion of the other cardboard sheet are affixed to one another.

The first electrode section (7a) and the second electrode section (7b) are formed such that the outer portion connected to the upper portion of the heating section (6) is thinner than the inner portion connected to the lower portion of the heating section (6). The heating section (6) and the first electrode section (7a) are interconnected by an R-shaped first connecting portion (21). The inner circumferential sloping surface of the heating section (6) and the second electrode section (7b) are interconnected by an R-shaped second connecting portion (22). The first and second connecting portions (21)(22) are formed such that R becomes larger from the upper end to the lower end, where the upper portion is thin and the lower portion is thick. The thickness of an intermediate portion (6b) is smaller than the thicknesses of the first and second connecting portions (21)(22).