Abstract: Cellulosic fibers containing latex solids are recovered from latex bonded broke by agitation of the broke in an aqueous alkaline solution having an alkali metal hydroxide concentration of 0.5 to 1.5 mol percent for a period of time in the range of ten minutes to four hours. The resulting fibers containing cured latex solids may be added to conventional papermaking fibers in amounts as high as 10 to 15 percent by weight for the production of facial quality tissue to produce a high quality product web.

Abstract: A paper cup or similar disposable thin-walled fluid container with a removable or pop-out portion in its sidewall containing redemption information is disclosed wherein the pop-out portion is formed by a series of surrounding perforations in the sidewall, which perforations are sealed against fluid leakage by being filled with the protective material, such as wax, that is used to coat the sidewall to protect it against the fluid in the container. The perforations may outline an integral portion of the sidewall or when the redemption indicia is to be obscured, separate portions at the opposite edges of the sidewall blank may be outlined, which portions will cooperate to form the pop-out portion as part of the sidewall seam when the edges are overlapped and joined. In the latter instance, the perforations extend into the sidewall beyond the limits of the seam so that an opening will occur in the sidewall when the pop-out portion or a part thereof is removed to view the prize indicating indicia.

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: Reclosable carton structure of a generally rectangular configuration is set up from a paperboard blank. A hooded cover is hingedly mounted over the open top of the carton and includes a serrated cutter bar extending along a free edge of the cover. A flap on the blank is folded to extend over and is adhered along its free edge to the inside of the carton wall underlying the portion of the hooded cover that includes the cutter bar. A tab is formed in the same carton wall by a knife cut main portion parallel to the fold of the flap and a pair of end portions each extending transversely of and from an end of the main portion, both end portions terminating between the fold and the adhered edge. Resilience of the paperboard, in combination with cooperative dispositions of the flap and the tab, causes the tab to be pivotally urged outwardly from the surface of the wall, pivotation occurring when the hooded cover is open.

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: 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 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: 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: Heat resistant ovenable paperboard containers are formed from wet sheets consisting essentially of cellulose fibers and containing 50 to 100 weight percent water based on the dry weight of the fibers by hot pressing in a mold at 200.degree. to 400.degree. F. Heat resistant synthetic fibers may be incorporated in wood pulp to produce the wet sheet and impart improved burst strength to the finished product.

Abstract: Fibrous webs of improved bulk and softness are produced by subjecting hydrophilic papermaking fibers to mechanical deformation, e.g. hammermilling, sufficient to deform the fibers without substantial fiber breakage, dispersing the resulting curled or kinked fibers, preferably in admixture with conventional papermaking fibers, in an aqueous foam with minimal agitation and holding time and forming a wet laid web from the resulting fiber furnish.

Abstract: A dispenser package for holding a stack of nested tapered disposable cups and dispensing them individually. The dispenser package has a generally circular opening in the top wall through which the bottoms of the tapered cups protrude; the opening is surrounded by a series of short radial slits or knife cuts defining a series of yieldable tabs around the periphery of the opening which permit the topmost protruding cup to be pulled through the opening, but which function to restrain the remaining cups in the stack. Additional slits or knife cuts in the top wall of the dispenser package extend from the opening in the top wall to each of the sidewalls at a point near each sidewall to permit loading a stack of cups through the top opening of the dispenser package without tearing of the top wall.

Abstract: A dispenser package for holding a stack of nested tapered disposable cups and dispensing them individually. The dispenser package has a generally circular opening in the top wall through which the bottoms of the tapered cups protrude; surrounded by a series of arcuate dispensing jaws interconnected with straight sided segments forming yieldable segments around the periphery of the opening which permit the topmost protruding cup to be pulled through the opening, but which function to restrain the cups immediately below. Slits or knife cuts in the top wall of the dispenser package extend from the opening in the top wall to each of the sidewalls at the mid point of each sidewall to permit loading a stack of cups through the top opening of the dispenser package without tearing of the top wall.

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: 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.