Abstract: A packaging, especially a machine-made container of paperboard, for instance for books. The packaging comprises four container surfaces and a projecting tab formed from a rectangular first blank having corresponding fold lines. The two remaining container surfaces consists of prefabricated hollow padding strips each of which is bonded by glue deposition at their undersides to the container bottom. After filling of the container, it is bonded by glue deposition at the top side with a closable cover having a free end that can be overlapped by a foldable projection firmly bonded to the projection using glue.

Abstract: A method for forming a corrugated paperboard and a container made therefrom is provided. The corrugated paper is formed with a first layer of flat paperboard to which a second layer of contoured paperboard is attached. The contoured layer of paperboard is further formed with a plurality of flutes, each flute including a first flute tip and a second flute tip, the flute being substantially vertical at the midpoint between the flute tips. The method of forming the corrugated paperboard container comprises placing the corrugated paperboard into a stamping dye which has a male dye portion and a female cavity shaped in the shape of which the paperboard is to be formed. The paperboard is then pressed between the dye and the cavity to apply a pressure to the paperboard. Heat is also applied to the paperboard simultaneously with the application of pressure. The dye is then removed from the cavity and the paperboard container is formed.

Abstract: A container for the temporary storage of foods is disclosed. The container includes a corrugated medium having a single backer paper thus creating an exposed corrugated surface on a side opposite the backer. The food container is formed such that the exposed corrugation is located towards an interior surface of the container. The corrugation is provided in a meandering, nonlinear pattern to provide strength along both longitudinal and transverse directions relative to the orientation of the corrugation. By using a corrugated medium having a single layer of backer paper, it is possible to construct the container using approximately one-third less materials without sacrificing strength.

Abstract: This invention relates to the design, construction and use of lined or coated corrugated paperboard package systems (e.g. boxes, cartons) for prolonging the storage life of fresh fruits and vegetables under modified atmospheres (MA) in the headspaces of the closed package systems. The plastic-paperboard construction comprises a first layer of polymeric film, a second layer of kraft paper adjacent the first layer, a kraft paper corrugated flute adjacent the second layer and a fourth layer of kraft paper adjacent the flute.

Abstract: This invention relates to a corrugated thermoplastic blank for a container. The blank (20) has a base panel (24) with wall panels (26, 28, 30, 32) connected to the base panel (24) by fold lines (38). The fold lines (38) comprise weld lines which destroy the original memory of the thermoplastic material. The free edges of the blank are sealed by seals (38) which prevent water from entering the blank. The sealed free edges and/or the weld lines or line (38) surround and reinforce each panel (26, 28, 30, 32) and increase the strength of each panel and thereby the strength of a container erected from the blank.

Abstract: The invention is directed to a composition of matter useful as a paper impregnant, to the method of its use, and to the products produced by the method. Poly (diphenylmethane diisocyanate) or PMDI has been used in the past as a paper impregnant with or without propylene carbonate as a diluent. These products have generally required pressing under high pressures and at elevated temperatures. It has now been found that triacetin and/or triethyl citrate in usages up to about 20% of PMDI give superior performance in impregnated products. The modified PMDI will cure at essentially ambient conditions in times as short as 1-2 days to insoluble polyureas with low residual amounts of isocyanates and reaction byproducts such as 4,4'-diaminodiphenylmethane. The treated papers can be used in applications of which skins for sandwich panels and high strength corrugated board would be exemplary.

Abstract: This invention relates to novel package systems for refrigerated modified atmosphere packaging of fresh fruit, vegetables and cut flowers. More particularly, this invention relates to the design, construction, closure, sealing and use of gas-permeable corrugated paperboard package systems for prolonging the storage life of fresh fruits, vegetables and cut flowers under modified atmosphere in the headspaces of the closed package system. A corrugated gas permeable paperboard comprising: (a) a first layer of Kraft paper; (b) a layer of polymer having a gas permeability which permits gas to be transmitted through the polymeric film at prescribed levels; (c) a second layer of Kraft paper, said first and second layers of Kraft paper sandwiching the polymer between them; (d) a corrugated fluting; and (e) a third layer of Kraft paper affixed to the corrugated fluting.

Abstract: A method of manufacturing a container for the temporary storage of foods is disclosed. The container includes a corrugated medium having a single backer paper thus creating an exposed corrugated surface on a side opposite the backer. The food container is formed such that the exposed corrugation is located towards an interior surface of the container. The method of manufacture involves fabrication of a single-face sheet of corrugated material to which is affixed a tape liner along opposed side edges of the sheet. A wider tape is affixed to the sheet intermediate the lateral edge tapes. The sheet is then cut along a longitudinal midline of the intermediate tape and also across the sheet to form discrete blanks. The blanks are substantially single-face corrugated material but have double-face corrugated material along the lateral edges where the tape was applied. Thereafter, the blank may be further cut, scored and folded to form containers having a single-face,bottom panel and double-face side walls.

Abstract: A shipping and display box is provided that has stacking holes in a bottom wall and stacking tabs protruding above a top wall for being received in stacking holes of a second shipping and display box stacked on top of the shipping and display box to prevent relative movement of the stacked boxes and to align the stacked boxes and facilitate drainage of water from the second shipping and display box into lower shipping and display boxes. Drain holes are formed proximate edges of the bottom wall of the shipping and display box, and diverter tabs are formed in side walls. The holes formed proximate the edges of the bottom wall facilitate drainage of water from an upper stacked box into holes formed by the diverter tabs in the side walls of lower stacked boxes.

Abstract: A reusable and collapsible container having a collapsed configuration for storage and shipment and an assembled configuration for containing a product. The container is formed from a polymeric sheet and has substantially flat panels, hinges connecting adjacent panels, and releasable fasteners on at least some of the panels for holding the panels in an assembled configuration. The sheet has opposing walls separated by longitudinally extending webs. A portion of the hinges cross the longitudinally extending webs and are formed by hot compression of at least one wall of the sheet. Another portion of the hinges are longitudinally extending and are formed by cold compression of at least one wall of the sheet.

Abstract: A generally flat tray is adapted for supporting a pizza or other food item on an upper surface thereof. The tray is preferably comprised of corrugated paperboard with its upper surface having a parchment-like coating and including a plurality of linear, elongated slots arranged in a spaced manner to permit juices and liquids exuded by the pizza to flow into and be trapped within the inner corrugated portion of the tray for maintaining the pizza crust dry and crisp. Facing edges of each slot are beveled downwardly to facilitate flow of the juices and liquids into the tray's inner portion where the juices and liquids are entrapped. The parchment-like coating on the tray's upper surface draws the juices and liquids from the pizza crust and redirects heat emanating from the pizza upward back into the pizza to maintain the pizza at an elevated temperature. The tray may be used for storing and serving pizza and may be integrated in the bottom of a closed container for transport and extended storage of the pizza.

Abstract: A box of the type to hold pies, such as pizza pies, which comprises a basic cardboard structure and a restrainer in an inactive form. When the box has been used for its purpose and it is time to be disposed of, the box is destructively folded into a log-shaped structure, which is prevented from spontaneously unfolding by activation of the restrainer.

Abstract: This invention relates to improvements in the top-to-bottom compressive strength of corrugated fiber containers through the use of a minimum amount of extra fiber. Such structures of this type, generally, employ strip and patch laminations which provide minimal additional fiber and maximal reinforcement in the areas of the corrugated container panels that are under the highest compressive stresses when the containers are subjected to compressive loads.

Abstract: A pizza container having raised bottom wall portions for air circulation underneath a pizza. This allows single-face corrugated inserts to be eliminated for cost savings. A two-piece pizza container has lid tabs hingedly joined to the lid along respective hinge lines recessed inwardly from the respective lid edges, each tab being folded along a fold line which lies generally along the respective lid edge to define an insertion portion to be received in a cut-out in a base side wall between inner and outer portions of the side wall and a portion between the insertion portion and the hinge line which is movable to effect lifting and lowering movement of the insertion portion for more easily attaching the lid and with the height of the cut-out being reduced for more effective attachment. The base has outwardly sloping side walls, and the "spring" effect of the insertion portion against the respective outer side wall portion is provided to resist downward forces on the lid to thereby protect pizza in the box.

Abstract: A container with an improved closure system and other improved features made of a single-faced paperboard blank formed of a corrugated paperboard layer and a substantially flat paperboard layer. The blank has scored lines or cuts which define a bottom portion, a cover, a cover support and four side walls. The boundaries of the side walls are defined by a plurality of substantially parallel scores and cuts that meet at a plurality of points so as to form side walls which have generally triangular ends. The improved closure system comprises at least one locking tab integrally formed in the cover and which has a plurality of flutes and at least one locking receptacle integrally formed in the bottom portion and which has an edge. Each corresponding receptacle and tab positionally coincide when the container is assembled so that a flute of the locking tab engages the flat paperboard layer by the edge of the receptacle to facilitate a closure.

Abstract: A composite material package in the configuration of a fluid confining tray or bowl is fabricated with a corrugated paperboard structural substrate and internally sealed with a blow mold applied film of polymer.

Abstract: A composite material package in the configuration of a fluid confining bowl with curved or arched side walls is fabricated with a paperboard structural substrate and internally sealed with a blow mold applied film of polymer.

Abstract: A repulpable reinforced corrugated container, such as a bulk bin, is reinforced with a mesh composed of natural, cellulosic strands, such as jute. The reinforcing material may be placed intermediate the outer liner and inner liner of a two faced corrugated board construction. The reinforced container is repulpable without significantly affecting fiber recover.