Abstract: The closure system of the present invention includes a pressure pad of conventional design which is urged against the external surfaces of a plurality of loosely associated overlying prefolded end side wall portions of the bottom end of a carton blank which is disposed on a mandrel which includes a backup pad disposed within the carton and contiguous to the internal surfaces of the prefolded end side wall portions to thereby capture the prefolded end side wall portions between the pressure pad and the backup pad.

Abstract: A bulk box of corrugated cardboard has a readily repulpable water vapor barrier material incorporated in the outer liner, increasing the resistance of the box to penetration by moisture in humid conditions, and especially reducing hysteresis effects in conditions of cyclic humidity. The box has increased strength and bulge resistance, and achieves performance equally as good as or better than a conventional box without the water vapor barrier, while at the same time enabling less pulp fiber to be used in the construction of the box.

Abstract: A lightweight panel construction in which a thin layer or veneer of gypsum board is laminated as a facing sheet onto a backing of lightweight open cell reinforcing material to form a composite panel that has the same surface characteristics and appearance as a sheet of conventional gypsum board and is suitable as a lightweight but strong substitute for conventional gypsum board. Portions of the open cell reinforcing material may be removed or omitted to form raceways or channels for utilities or the like.

Abstract: A mathematical model is used to design paper and paperboard having improved runnability. The mathematical model provides an estimate of fracture toughness for an optimized paper product based on specific measurement parameters, e.g., filler percent, softwood content and caliper for optimal fracture toughness. After the optimizing set of measurement parameters has been acquired, these parameters can be used to manufacture grades of paper having improved runnability performance, e.g., in printing presses.

Abstract: The invention relates to methods for reducing the amount of halogenated organics produced during a halogen bleaching process for lignocellulosic pulp fibers. According to the disclosed invention, it has been discovered that the use of a chelating agent prior to a non-halogen containing bleaching stage of a pulp bleaching process is effective to increase the brightness of the resulting bleached pulp without the need to increase the amount of halogen compounds required to obtain the same pulp brightness and without adversely affecting the pulp viscosity and yield.

Abstract: A system and method are provided for tracking and documenting environmental compliance in a pulp mill, related primarily to the bypassing of liquid hazardous pollutants from a capture and treatment system. The method and system provide continuous information regarding the input materials, the output products, and the operations of equipment in the pulping process. The continuous information is provided to a central processor for determindation of emission levels that exceed certain predetermined levels. The method and system permit personnel to verify compliance with environmental regulations, verify the reliability of pollutant collection and treatment equipment and record the actions taken to correct an inappropriate emission or equipment failure.

Abstract: A non-foil laminate for an extended long life juice, punch or beverage container, which can be hot filled or cold filled and provides an effective barrier to oxygen ingress, for the containment of flavors and aroma and prevents the loss of Vitamin C by virtue of its reduced permeability to oxygen is provided. The laminate comprises an inner barrier layer sandwich of polyamide/EVOH/polyamide, layers of polyolefin on both the matte side (interior) and the gloss side (exterior) of the laminate and a second barrier layer of EVOH closer to the product contact surface which is not in contact with the polyamide/EVOH/polyamide sandwich or layer of polyolefin on the matte (interior) side of the laminate.

Abstract: A disaster relief coffin box made of moisture resistant corrugated cardboard that may be shipped and stored in a flattened condition and erected at the point of use to form a container having a bottom portion and a top or cover. The bottom portion and cover are each made of a single blank of material, and include interlocking panels that retain them in their erected and sealed condition without requiring the use of tape, glue, stitching or other fasteners. Gusset corner panels ensure a leak-proof structure.

Abstract: A corrugated paperboard bulk box has opposed pairs of parallel side walls, and in a preferred embodiment, has interposed diagonal corner panels to form an octagonal box. The bottom of the box is closed by first and second opposed pairs of flaps, wherein a T-shaped locking tab is formed on the free edge of one of the flaps of the first pair, and a notch is formed in the free edge of each of the flaps of the second pair. In erecting the box, the flaps of the first pair are first folded inwardly over the bottom of the box, with the free edges thereof confronting one another and the flaps lying in substantially flush, coplanar relationship. The flaps of the second pair are then folded inwardly over the first pair, with the free edges of the flaps of the second pair lying in confronting relationship with one another and the notches therein defining a central opening.

Abstract: A machine and method for applying reinforcing strapping to bulk boxes. The machine includes a plurality of strapping head assemblies arranged in series, with each adapted to apply a strap in encircling relationship to a box at a predetermined location on the box. As the box advances through successive strapping head assemblies, straps are applied in predetermined spaced relationship on the box, until the desired number of straps have been applied. The number, spacing and tension of the straps may be quickly and easily adjusted. In an embodiment of the invention, the strapping head assemblies are arranged in pairs in individual modules. A recovery strapping head assembly is provided just prior to exit from the machine to apply any strapping missed by a preceding strapping head assembly.

Abstract: A method for inducing oxygen scavenging within paperboard package structures using ultraviolet light to activate the scavenging material during the filling process or prior to the filling process for gable-type paperboard packages. An ultraviolet light source is placed in close proximity to a gable-top blank or along the horizontal chain or line following bottom formation and prior to filling a carton with product.

Abstract: The clam shell container is formed by a cover formed of cardboard, chipboard or other similar material. A thermoform plastic tray is adhered to the inner surface of the cover to form the completed clam shell container. When closed, the edges of the tray move closer to the edges of the cover. The thermoform is bonded to the tray with adhesive and the container is closed to allow the adhesive to cure in the closed configuration. When opened, stress is created by the tray being fixed to the cover. To alleviate the stress, perforations between the tray sections and the spine break forming three distinct sections. In the open configuration, a small gap is created between the tray section and the spine.

Abstract: A method and an apparatus for predicting a score-line cracking propensity of a multi-ply substrate. The method includes the steps of: bending the multi-ply substrate; acquiring tensile load data from the multi-ply substrate during bending; and computing a material property of a top ply of the multi-ply substrate based on the acquired tensile load data. The material property must show a strong correlation to the score-line cracking propensity of the multi-ply substrate. The material property which is computed is the energy consumed in plastic deformation of the top ply during the fracture process. The measurement results can be used to predict score-line cracking propensity in multi-ply board systems, such as multi-ply paperboard.

Abstract: A method and apparatus for forming a bottom closure of a container employing multiple assembly lines and including a universally foldable seal fin as a part of the bottom closure. A novel blank for the container is disclosed.

Abstract: A corrugated structure has a first and a second linerboard, with a corrugated medium sandwiched between the first and second linerboards. An RF processor is coupled between one of the linerboards and the corrugated medium. The processor may be positioned on an inlet or label, which may also include an antenna. A method of forming a corrugated structure having an embedded RFID processor includes providing a linerboard and a corrugated medium, positioning an RF processor between the linerboard and the corrugated medium, and affixing the linerboard and corrugated medium together with the RF processor positioned therebetween. An assembly line for forming a corrugated structure includes a supply of a first linerboard, a second linerboard, a corrugating material stock, and inlets that have an RF processor and antenna coupled to the inlets. The assembly line also includes a corrugator, a single facer, a double facer, an inlet applicator, and a cutter.

Abstract: The specification discloses a method for extrusion coating multiple substrate webs on a dual or tandem extruder system having multiple extruder stations. The method includes as an initial step providing a first substrate web and a second substrate web wherein each of the first and second substrate webs has a coating side and an underside. The webs are temporarily joined to form a composite web wherein the respective coating sides face outward and the respective undersides face one another. A first polymer coating is extruded on the coating side of the first web at a first extrusion station. Subsequently, a second polymer coating is extruded on the coating side of the second web at a second extrusion station. The extrusion coated first and second webs are then separated. The invention enables more efficient and economical use of dual or tandem extruder systems.

Abstract: A container made from corrugated paperboard has at least one mitered corner, with an extended edge portion of one of the container walls extending beyond the mitered corner. A bag cuff grab is formed on the extended edge portion to engage and at least temporarily hold in position a bag placed in the container while product is placed in the bag and container. In one embodiment, the container has six sides, with two side walls, two end walls, and two mitered corners. In another embodiment, the container has seven sides, with two side walls, two end walls, and three mitered corners. In a third embodiment, the container has eight sides, with two side walls, two end walls, and four mitered corners. A bag cuff grab can be formed on an extended edge portion at only one or all of the mitered corners, and can be limited to two bag cuff grabs on extended edge portions at diagonally opposite mitered corners. In a preferred embodiment, the bag cuff grab is a notch formed in the extended edge portion.

Abstract: The invention relates to a laminated board grade structure used for low cost, enhanced graphics packaging. The product contains an unbleached or bleached substrate board and a lightweight coated unprinted white paper grade laminated to the unbleached board substrate to produce a product with a smooth coated, glossy surface for quality graphics printing.

Abstract: A seal for the selective sealing of a rod which is reciprocatable within an opening through the wall of an enclosure such as the filling station of a packaging machine, the seal being actuatable to selectively provide a fluid-tight seal between the rod and the wall and release of the seal for free non-sealed movement of the rod within the opening. A method is disclosed.