Abstract: Apparatus and method for laying down a fibrous web from a foam-fiber furnish. A headbox includes walls defining an elongate channel extending transversely of the direction of movement of the forming wire. Foam-forming nozzles are positioned to introduce foam-fiber furnish into the channel for turbulence - inducing impact on an oppositely disposed wall defining the channel. The turbulently flowing foam-fiber furnish is then introduced to the headbox slice for discharge onto the forming wire with minimized MD orientation of the fibers.

Abstract: A method of embossing a sheet of non-woven fibrous web, and the resulting fibrous sheet structure, e.g. toilet tissue, with a series of identical boss elements arranged in a uniform pattern in a manner to avoid nesting of the embossments and resulting non-uniform product rolls when the sheet is rolled onto a mandrel. The embossments are uniformly spaced in rows which in the longitudinal direction form an angle in the range of 15.degree. to 23.degree. relative to the edge of the sheet or roll and an angle in the range of 40.degree. to 57.degree. relative to the cross direction of the sheet or roll.

Abstract: An apparatus for the manufacture of fibrous webs comprises a forming wire and a distributor for depositing dry fibers on the wire. The distributor comprises at least one cylindrical chamber having its axis extending transversely of and in a plane parallel to the wire. The lower semicylindrical wall of the chamber is perforate for distributing fibers on the wire and the upper semicylindrical wall includes a fiber inlet. A helically bladed rotor in the chamber has its axis substantially coincident with the chambers axis of curvature, and upon rotation operates to drive fibers through the screen while evenly distributing them across the wire. Disposition of a pair of chambers in tandem with a common central fiber inlet operates further to create a racetrack fiber distribution across the wire.

Abstract: A packaged arrangement (1) contains a tray (4) which is convertible into a heating stand by inversion thereof. The walls of the tray are of a material that is transparent to microwave energy, but a support wall (10) which forms a bottom of the tray and top of the stand is provided with a liner of a microwave interactive layer that is formed of a material capable of converting microwave energy into heat. The tray (4) is configured so as to define a storage space for a predetermined quantity of food and to possess sufficient strength as to be able to support the predetermined quantity of food upon the support wall (10) in the inverted, heating stand condition thereof. A second packaged arrangement (1') comprises a recloseable package body (2') that may be used, at least in part, to form the enclosed air space and stand.

Abstract: Two or more webs (11 and 12) of highly bulked substrate are passed into a nip formed between a gravure roller (14) and an impression roller (15). The impression roller has raised areas defining an interconnected network of lines such that the webs are compressed only under the raised areas; as a result, the binding liquid applied by the gravure roller (14) to the laminate of the two webs is absorbed substantially through the webs in the compressed areas. The gravure roller (14) may have a uniform surface, such that a light coating of binding liquid is applied to the surface of the uncompressed areas in the laminate, or the gravure roller may have a pattern of etched grooves or cells which matches and registers with the pattern of raised areas on the impression roller. In the latter embodiment, binding liquid will be absorbed into the laminate only in the compressed areas.

Abstract: An apparatus for sampling particulate material, such as wood chips as they fall through an unloading chute, includes a tube mounted in a wall of the chute and having an upper end extending into the path of chip flow. The upper end includes a generally semi-cylindrical extension terminating in a generally quarter-spherical section in provision of a chip receiving opening to one side of the tube and a chip deflector to the opposite side of the tube. The lower end of the tube extends outside the chute and communicates with a chip-collecting container, and the tube is selectively rotatable by a timed motor and gear arrangement to present the one side of the tube upwardly to receive chips for sampling or the other side upwardly to deflect chips and prevent their entry into the tube for collection in the chip container.

Abstract: A microwave carton (2) including a bottom tray-shaped portion (4) having upstanding inner side wall panels (10,12,14,16) and a telescoping top portion (6) having downwardly extending side wall panels (30,32,34,36) wherein a layer (28) of microwave reflective material covers the entire interior surface of the top portion (6) and a vapor escape means (24) is provided for allowing vapor generated within the carton (2) to be vented to the exterior of the carton (2) by passing through a space formed between one inner side wall (10,12,13,16) and one outer side wall (30,32,34,36). The vapor escape means (24) may be formed by removing an upper portion of one of the inner side walls (10,12,14,16). One of each pair of corresponding sidewalls may be angled to for a space therebetween through which vapor may escape.

Abstract: A packaged arrangement (1) contains a tray (4) which is convertible into a heating stand by inversion thereof. The walls of the tray are of a material that is transparent to microwave energy, but a support wall (10) which forms a bottom of the tray and top of the stand is provided with a liner of a microwave interactive layer that is formed of a material capable of converting microwave energy into heat. The tray (4) is configured so as to define a storage space for a predetermined quantity of food and to possess sufficient strength as to be able to support the predetermined quantity of food upon the support wall (10) in the inverted, heating stand condition thereof. A second packaged arrangement (1') comprises a recloseable package body (2') that may be used, at least in part, to form the enclosed air space and stand.

Abstract: A container (2) for heating popcorn or other types of particulate food items in a microwave oven formed from a single blank having a bottom panel (4) coated with a microwave interactive material (26) adding heat to particulate food items such as popcorn kernels and configured so that each particulate food item placed into the container (2) for heating is spaced, on average, no more than the average diameter of one such food item away from the microwave interactive layer. The container is formed for shipping in a triangular wedge shape and for expansion to a trapezoidal box shape for use within a microwave oven for heating of the particulate food items.

Abstract: A liquid tight carton with a pour spout having a tear-off portion separated from spout edge forming panels, and panels forming a top fin seal, by lines of structural weakness. The spout of the castor is formed from extended portions of the sidewalls and one end wall. The outer surface of the top is comprised of the extended portion of a sidewall with an opening disposed to allow grasping of the tear-off portion in one corner of the top.

Abstract: Apparatus and method for the manufacture of a non-woven fibrous web such as paper from a dispersion of fibers in a foamed liquid in which fiber furnished in a foamed liquid comprising a solution of surfactant in water is discharged from a headbox into the nip of a twin forming wire prior to its passage over a forming roll. The water-surfactant solution is drained from the web and recycled as a foamed liquid containing about 65% air in the form of bubbles of from about 20 to about 200 microns in diameter. The foamed liquid is directed into a mix tank wherein a slurry containing fiber at 20% to 55% solids is added and mixed. The mixture is pumped to the headbox and into the nip of the forming wires.

Abstract: A collapsible, carrier carton comprises a split cover, overlay closure with self-erecting handles and a side panel/web flange lock. This web lock permits secure locking of the split cover closure into a flattened and closed configuration and secures the removable upper tray(s) in a locked position. The split cover closure includes opposite side member panels having self-erecting, interlocking male and female handles. One of these side member panels is of a greater than the other to permit a split cover closure overlap which prevents contamination of the container interior when the side panels are closed. The split cover closure also includes outwardly and downwardly folding, notched-out web flaps with alignment holes. Each of these web flaps interlocks in a corresponding contour-crease, inwardly biased, side panel, knife-cut web lock. The carrier carton includes removable upper trays with vent holes.

Abstract: A package includes two or more individual cup dispensing units, each unit comprising a carton holding a stack of nested tapered cups. Each carton of a dispensing unit is of paperboard having a generally circular opening in a top wall through which the tapered cups protrude, and which opening is surrounded by a series of short radial knife cuts defining a series of yieldable tabs on the wall which permit the topmost protruding cup to be pulled through the opening, but which function to restrain the cups immediately below. The bottom wall of the carton is formed with a generally circular opening, either fully cut-out or defined by a series of radial cuts, which permits the protruding tapered cups of a similar, adjacent carton to extend through the bottom opening into the carton to form a compact, multiple dispensing unit package which is shrink wrapped for shipping and display.

Abstract: In the manufacture of skinned foam a technique for matching the viscosity of the skin as well as the foam so that both flow uniformly through the die includes the addition of blowing agent to all of the layers of the structure. To prevent foaming of the skin layers, nucleating agent is not added at those layers and the temperature is controlled so as to prevent nucleation without a nucleating agent. More specifically, the skins are kept above the boiling point of the blowing agent at atmospheric pressure and melt temperature, but below the temperature at which homogeneous nucleation occurs.

Abstract: A method of forming pressed paperboard and pressed paperboard articles from a cellulosic fiber pulp, wherein the paperboard or paperboard articles has improved high temperature properties required of ovenable cookware. A preformed sheet or blank formed from a cellulosic fiber pulp, and having a water content in a range of from about 50% to about 100% by weight, is placed in an unheated press or mold to form the sheet or blank at a pressure in the range of from about 160 psi to about 2600 psi and then dried. When compared with hot press dried paperboard or shaped paperboard articles, such as ovenable baking trays, the products of the method of this invention have superior burst strengths after exposure to a temperature of 450.degree. F. (232.degree. C.) for one hour.

Abstract: A web (12) of highly bulked substrate is passed into a nip formed between a gravure roller (14) and an impression roller (15). The impression roller has raised areas defining an interconnected network of lines such that the web is compressed only under the raised areas; as a result, the binding liquid applied by the gravure roller (14) to the web is absorbed substantially through the web in the compressed areas. The gravure roller (14) may have a uniform surface, such that a light coating of binding liquid is applied to the surface of the uncompressed areas in the web, or the gravure roller may have a pattern of etched grooves or cells which matches and registers with the pattern of raised areas on the impression roller. In the latter embodiment, binding liquid will be absorbed into the web only in the compressed areas.

Abstract: A cook-in carton includes a two-panel wall. The inner one of the two panels is provided with vent openings, and the outer one of the panels extends over the openings and is adhered to the inner panel by tabs on opposed edges thereof. The outer panel includes between the tabs a weakened section and opposed flaps. Parallel score lines are provided in each of the flaps, and lugs are formed on the free edges of the flaps upon removal of the weakened section. The flaps are then foldable, in accordion fashion, followed by insertability of the lugs into apertures aligned therewith, where they are restrained in formation of carton support legs.

Abstract: Apparatus and method for the manufacture of a non-woven fibrous web such as paper from a dispersion of fibers in a foamed liquid. In a preferred embodiment, a solution of surfactant in water is initially discharged from a headbox into the nip of a twin forming wire prior to its passage over a curvilinear path defined by a forming roll. The water-surfactant solution is caused repeatedly to pass through the outer one of the twin forming wires until there is created, and stored in a silo, a foamed liquid containing about 65% air in the form of bubbles of from about 20 to about 200 microns in diameter. The foamed liquid is directed from the silo into a mix tank wherein a slurry containing fibers at 20% to 55% solids is added and mixed. The mixture is pumped to the headbox and into the nip of the forming wires. The outer wire retains the fibers while passing and again foaming the liquid for return to the silo and the mix tank for addition of fibers and return to the headbox.

Abstract: A coated paperboard product and a process for producing the same which includes corona discharge treatment of a paperboard surface and subsequent extrusion of molten polyester thereon. The resulting product has a very high degree of adhesion between the paperboard and polyester layers, and is capable of being utilized for forming pressed food trays which can be subjected to oven cooking temperatures.