Abstract: Composites of paper and bioriented polyester plastic film are made by passing a web of paperboard and a web of plastic film, with a layer of extruded molten polymer impregnating and bonding agent between the webs, through a nip. The process involves controlling one or more of the speed of the webs, the temperature of the molten polymer, the pressure or spacing of the rolls at the nip, and the rate of extrusion, relative to the porosity and surface characteristics of the paper web such that a portion of the molten polymer impregnates partially into and becomes part of the paper web and a substantial portion lies outwardly of the surface of the paper web and solidifies to form a new surface to which the film is bonded and which it is supported clear of the paper surface. The molten polymer may be polyethylene or an ethylene acrylic acid copolymer. These composites are useful in forming corrugated structures which may be used for baking in convection ovens.

Abstract: Composites of paper and bioriented polyester plastic film are made by passing a web of paperboard and a web of plastic film, with a layer of extruded molten polymer impregnating and bonding agent between the webs, through a nip. The process involves controlling one or more of the speed of the webs, the temperature of the molten polymer, the pressure or spacing of the rolls at the nip, and the rate of extrusion, relative to the porosity and surface characteristics of the paper web such that a portion of the molten polymer impregnates partially into and becomes part of the paper web and a substantial portion lies outwardly of the surface of the paper web and solidifies to form a new surface to which the film is bonded and which it is supported clear of the paper surface. The molten polymer may be polyethylene or an ethylene acrylic acid copolymer. These composites are useful in forming corrugated structures which may be used for baking in convection ovens.

Abstract: The present invention provides an apparatus that can erect a tray from a generally flat, rectangular blank. The tray erector incorporates an inventory section, a transfer section, a construction section and an exit section. The inventory section has a hopper with flanges and tab stops, which hopper stores an inventory of stacked, flat blanks that will eventually become the trays. In the transfer section, a blank is transferred from the inventory section to the construction section of the present erector. The construction section includes a setup assembly and a locking assembly. The setup assembly folds the pre-cut and scored end and side panels of the tray blank up into approximately perpendicular planes in relation to the plane of the bottom panel of the blank. The end and side panels are folded up from the plane of the bottom panel of the blank in preparation for the locking of the corner webs.

Abstract: Composites of paper and bioriented polyester plastic film are made by passing a web of paperboard and a web of plastic film, with a layer of extruded molten polymer impregnating and bonding agent between the webs, through a nip. The process involves controlling one or more of the speed of the webs, the temperature of the molten polymer, the pressure or spacing of the rolls at the nip, and the rate of extrusion, relative to the porosity and surface characteristics of the paper web such that a portion of the molten polymer impregnates partially into and becomes part of the paper web and a substantial portion lies outwardly of the surface of the paper web and solidifies to form a new surface to which the film is bonded and which it is supported clear of the paper surface. The molten polymer may be polyethylene or an ethylene acrylic acid copolymer. These composites are useful in forming corrugated structures which may be used for baking in convection ovens.

Abstract: A foldable laminated paperboard chest for transporting and storing food products, and a one-piece laminated paperboard blank from which such a chest is constructed. The chest includes a leak-proof corner construction and a plastic film coating layer to prevent leakage of fluid contents, an integral handle, and a locking closure top.