Abstract: A dry mix-type, drywall panel joint compound is produced which comprises (a) a fine plaster which is applied to a joint formed between adjacent drywall panels in the plastic state to form a hardened material, (b) a material which imparts internal strength and workability to the joint compound, (c) a material for retaining water and inhibits shrinkage of the joint compound within the joint formed between adjacent drywall panels, and (d) a set time control agent. The more preferred joint compound formulation of this invention includes (a) stucco, (b) methyl cellulose, and (c) perlite. A longer set time version of the subject dry mix-type, drywall panel joint compound can also be provided which comprises, in addition to (a)-(d), (e) at least one water absorption agent, (f) at least one shrinkage and cracking inhibitor, (g) at least one adhesive strengthening agent, and (h) an alkaline material for raising the pH of material.

Abstract: A dispenser for flexible sheet material rolls in which a first roll is supported in a dispensing position, a second roll is supported in a reserve position and a roll transfer apparatus is operative to transfer the second roll to the dispensing position upon depletion of sheet material from the first roll with the supporting arrangement for the roll in the dispensing postion being rotatable with such roll and thereby subject to significantly reduced friction effects.

Abstract: A box for a flexible bag liner is formed from a blank of sheet material such as corrugated paperboard. The primary feature of the box is a retaining and locking structure for a spout of the bag liner disposed on an inner top flap. The inner top flap is attached to an inner portion of a side wall, and retains the spout in an aperture in either a retracted position or a dispensing position. The aperture secures the spout rigidly to facilitate filling and dispensing. An outer top flap covers the spout both during shipping and storage between uses.

Abstract: A device for rotatably supporting a roll of flexible sheet material having trunnions at the ends is provided with structure forming a friction brake to effectively control overspin of the roll during dispensing of the sheet material. The device involves an end support particularly configured to provide a bearing surface formed of resilient, high friction material effective to engage a portion of an end cap forming a roll trunnion, whereby the braking action provided by the bearing surface is directly proportional to the weight of the roll.

Abstract: Gypsum-containing boards, uses for these boards, and methods for making them are provided. The board includes a set gypsum core having a fibrous glass at disposed thereon. The core includes a water-resistant additive in at least a minimum amount sufficient to impart to the board an ASTM C-473 water absorption value of less than about 10%. This additive includes organohydrogenpolysiloxane resin added with a portion of the mixing water, or otherwise added in neat form to the process for preparing the slurry.

Abstract: Diecut or otherwise cut or formed pieces of a laminate for providing temporary surface protection to the incompletely dry surface coating on a flat or planar article such as metal nameplates, control panel bezels, dials, name tags and the like. Such flat or planar metal articles are widely used on appliances and machines where permanence and good readability are important. The individual laminated pieces are cut, with or without scoring, from sheets formed by laminating a ply of spunbonded polypropylene to a ply of chipboard or other inexpensive solvent absorbing backing material, In use the spundbonded polypropylene surface of a piece of the laminate is placed against the incompletely dry surface coating to be protected of a nameplate or like article and the combination is packaged together with other similar combinations for shipment.

Abstract: The invention is directed to a tongue and groove product which comprises a first and second major surface and a first and second longitudinal edge. The first longitudinally edge including means defines a longitudinally-extending groove. The second longitudinal edge includes a longitudinally-extending protruding tongue for interlockingly engaging a complimentary grooved longitudinal edge of an adjacent tongue and groove board. The protruding tongue has an upper and a lower longitudinally-extending surface. The major design feature of this invention is that the protruding tongue has at least one substantially vertically-extending opening formed therein. Each of the openings extends through the protruding tongue from said longitudinally-extending upper surface to said longitudinally-extending lower surface for providing at least one drain path for water to drain by gravity from said first major surface downwardly through each said vertically-extending opening.

Abstract: Compositions containing nonfibrous calcium sulfate in hemi-hydrate or anhydrous form and fibrous additives, including paper fibers preferably derived from waste newspaper, capable of being formed into an unfaced building material having superior mechanical properties and/or fire resistance.

Abstract: The present invention is a collapsible, multi-wall fiberboard container which is fixedly attached to a pallet. The container is particularly designed to hold flowable type materials such as sludge or particulates, and may be used for containing, transporting, storing or disposing of hazardous waste. The container is preferably a double wall, tubular member having opposed side panels and opposed end panels, with the end panels being generally normal to the side panels. The container also includes top and bottom flaps hingedly connected to the end and side panels. Three of the bottom flaps are formed as a half bellows. The remaining bottom flap is adapted to be attached to a pallet. Preferably, the top flaps are also of a regular slotted design. Laminated and glued to the interior of the container is a triple wall reinforcing member in the preferred embodiment. A polybag liner may be used in the container.

Abstract: Firedoor constructions manufactured from board compositions containing calcium sulfate in hemi-hydrate or anhydrous form and fibrous additives, including pulped paper fibers preferably derived from waste newspaper, capable of being formed into firedoor members having superior mechanical properties and/or fire resistance.

Abstract: Glass mat-faced gypsum boards having a set core containing gypsum dihydrate and at least a minimum amount of chopped fibers, as well as other optional fire-resistant additives, are provided. The resulting boards obtain superior fire resistance properties over conventional paper-faced boards of like thickness which include a similar amount of chopped glass fibers.

Abstract: A method for incorporating siloxane into a water-resistant, gypsum-based article is disclosed, comprising, (A) adding said siloxane to water; (B) mixing said siloxane/water mixture with calcined gypsum to form an aqueous slurry; and (C) allowing said slurry to set to form a set gypsum-based, water-resistant article.

Abstract: The saw blade has a series of teeth which are formed with cutting elements which are spaced inwardly from an outer circumferential edge and have sides which extend outwardly from planar sides of the saw blade. The saw blade is designed to cut yieldable material without cutting the carrier medium which can be a conveyor belt or a caul. Cutting is achieved by pushing the blade into the yieldable material until a cutting element engages the material. Movement of the blade then causes the cutting element to cut the yieldable material until a full depth cut is accomplished. The conveyor belt or caul is not cut by the saw blade outer edge which acts like a smooth disk. The saw blade can include a wear strip positioned on the outer circumferential rim to lengthen the life of the saw blade and conveyor belt or caul.

Abstract: A machine for blowing loose thermal insulation into cavities in the walls, ceilings, and floors of buildings is contained within a smooth box-like housing that is easily moved about within a house on its own wheels and is easily transported to and from a job site. The housing encloses an equipment cavity and has a hopper located above the equipment cavity, but the hopper, into which the loose insulation is placed, is octagonal so that corner channels exist within the housing between the sides of the hopper and the corners of the housing. The equipment cavity at the bottom of the housing contains a motor which rotates an agitating wheel in the hopper, and that wheel has flexible tips that sweep the loose insulation over the floor of the hopper and into a feed hole in that floor. A grate extends through the hopper above the wheel to prevent access to the wheel in the bottom of the hopper.

Abstract: A process for reducing the energy requirements for drying a cellulosic pulp slurry by contacting a pulp slurry with sodium sulfate before web formation, dewatering and drying.

Abstract: An apparatus for removing gaseous hydrocarbon fraction from a heated gas comprises a cooled air inlet to condense the hydrocarbon to viscous liquid particles. An electrostatic field established between a points array and a plate propels the particles to a moving non-conductive collector belt, from which the liquid condensate is removed by a doctor blade and deposited into a heated receiver trough. The liquid condensate is discharged from the receiver trough into a container. A method comprises passing a heated gaseous, liquid droplet-containing stream through an electrostatic field which propels the droplets to a liquid collector, and removing the liquid from the collector, and discharging the liquid into a container for disposal.

Abstract: Ths invention relates to an improved method of preparing a solid amino-aldehyde condensation product wherein the solid condensation product precursor solution is fed to the bottom of the reaction vessel.