Abstract: A tough, flexible, sheet-like matrix for a bas-relief pattern is made by casting a reinforced resin on a mold of the pattern and submerging a perforated plate in the liquid resin so that the plate is parallel to a substantially flat plane generated by the lowest points of the pattern. The matrix, exclusive of the peaks and valleys of the pattern, has a uniform thickness and has a multitude of studs integral with and dependent from the sheet. A porous matrix is useful for the wet-end texturing of fiberboard at the final suction press roll of a Fourdrinier fiberboard machine.

Abstract: A composite paper particularly adapted for use as cover sheets in the production of gypsum wallboard, the paper being sufficiently porous to permit better drainage and more rapid drying in the production of the paper, and when applied to the surfaces of a gypsum slurry for forming wallboard, permits less heat to be utilized in the wallboard conversion, thereby saving energy in the board production required for drying the board. The paper comprises in weight percent:(A) cellulosic fibers in an amount of from about 65% to about 90% and preferably having a fiber freeness of from about 300 ml to about 550 ml Canadian Standard Freeness,(B) calcium sulfate as a filler in an amount of from about 10% to about 35%,(C) a binder in an amount from about 1% to about 31/2%,(D) a flocculant in an amount of from about 0.1% to about 0.2%,(E) a buffering agent in an amount from about 0.

Abstract: A method for making acoustical tile having a pattern of raised portions and portions in relief on the tile surface is provided by contacting deformable, acoustical tile fiber composition pulp with a hollow embossing roll containing the pattern in reverse and interstices communicating from the surface of the roll into the hollow interior of the roll; pressing the roll against the deformable pulp with sufficient force as to dispel the pulp; vent air, between the roll and the pulp surface, through the roll and produce the reversed pattern of the roll upon the pulp surface; and releasing the pulp from the surface of the roll by rotation of the roll.

Abstract: The kerfed edges of wall panels attached to H-studs by engagement of the stud flanges within the kerfs are protected against breakage by panel bracing ribs installed within the wall cavity by insertion of the ribs into apertures located in the webs of the studs. Said ribs are bowed wafers of plastic or other flexible material having a notched tab at each end. Insertion of the vertically oriented tabs into said apertures and rotation of the bow to orient said tabs horizontally secures the bracing rib to the stud.

Abstract: A demountable glass stop assembly for use in non-bearing partition wall glazing systems, comprising in combination a pair of elongate members preferably formed by extrusion, each of the elongate members being substantially U-shaped in cross-section, a first elongate member having a laterally extending planar arm terminating in a hook at the end thereof, the second elongate member having a detent hook at the end of a leg thereof complementary with and adapted to engage the hook of the first elongate member, and having a protuberance extending from a portion thereof, and a glazing spline of an elastomeric material having a notch provided therein engaging the protuberance of the second elongate member, and having means for engaging a glass pane placed between the first and second elongate members, thereby providing a resilient biasing force urging the second elongate member away from the first elongate member and thereby maintaining the hook of the first elongate member engaged with the detent hook of the second

Abstract: A connector for the interconnection in generally perpendicular array of generally C-shaped elongate structural members having a pair of flanges integrally and perpendicularly connected with the web portion thereof in which said flanges each include a flange return edge which extends inwardly of the generally C-shaped channel, which connector, upon the assembly of said interconnection, provides strengthening of the webs of each said C-shaped structural member, and a floor assembly comprising said connector and said generally C-shaped elongate structural members.

Abstract: A composition comprising mineral wool and polyolefin fibers is adaptable for spraying onto a ceiling or wall or the like to form a textured acoustical coating.The fibers are mixed with a binder, water and foaming agent to form a foamy composition. The composition is confined under pressure and released through a nozzle to form a steam. Compressed gas is introduced into the stream to atomize the composition.

Abstract: Solidification of colloidal argillaceous matter in essentially non-settling, aqueous slime media into a solid stable matrix is accomplished by mixing such slime with a hydratable calcium sulfate and hydrating to form an interlocking strength bearing matrix. The method is particularly useful for coalescing phosphatic clay slimes with hydratable calcium sulfate prepared from the co-produced waste phosphogypsum.

Abstract: A lightweight joint compound for use in finishing joints between gypsum wallboards, comprising a filler, a binder, a specially treated expanded perlite, a non-leveling agent, and a thickener.

Abstract: An adjustable wall jamb assembly for a shower door comprising a fixed wall jamb member adapted to be affixed to a wall, an adjustable block assembly comprising a block adapted to be affixed to the fixed wall jamb and having a threaded opening, and an adjustment screw having an external thread complementary with that of the adjustment block, the adjustment screw having an axial aperture and engaging means at one end for being engaged and rotated within the adjustment block, an adjustable jamb member adapted to slide over the fixed jamb member and to engage the end of the adjustment screw, and a screw disposed through an aperture in the adjustable jamb member, extending through the axial opening of the adjustable screw and being adapted to enter the wall on which the fixed jamb member is mounted.

Abstract: A wet process for producing phosphoric acid and phosphoanhydrite by acidulation of phosphate rock with a phosphoric acid/sulfuric acid mixture containing a very high recycle content of small sized anhydrite seed crystals. A strong phosphoric acid is obtained having a concentration of at least about 35% P.sub.2 O.sub.5. Further, the phosphoanhydrite may be readily converted to an industrially usable gypsum product.

Abstract: An integral clamp and screw in the shape of an L has a panel supporting leg and a leg from which a screw projects through and beyond the panel supporting leg. The clamp is used to support a building panel while aligning said panel over the framing members to which it is to be attached and while fastening the panel to said members. The screw is turned into a framing member, such as a ceiling joist or wall stud, by turning the clamp by hand until the panel support leg is close enough to hold the panel loosely against the member, putting the panel into place and then turning the clamp further until the supporting leg holds the panel tightly against the framing member.

Abstract: A network of reinforcing fibers is pressed against the surface of an underlying carrier sheet by the weight of a concrete mix. A vertical gap between the sheet and the network is created so that the concrete mix may penetrate the voids of the network and spread out on the underlying sheet to embed the fibers.

Abstract: A paper cover sheet material for use in the production of gypsum wallboard, the paper cover sheet material having excellent drainage, porosity and drying properties, and a wallboard product produced therefrom, the paper cover sheet material being produced from fibers comprising a major proportion of cellulose fibers and a minor proportion of mineral fibers, the paper composition additionally comprising a cellulose gel, a latex binder and a flocculating agent, thereby enabling the mineral fibers to be dispersed in an aqueous slurry without materially fracturing the fibers, and retaining the shot present in the mineral fibers without permitting the shot to be released and thereby to contaminate the papermaking equipment. The excellent porosity, drying properties and drainage of the paper permit the gypsum wallboard formed with the paper to be readily set and dried with reduced heat energy requirements.

Abstract: A fishing lure comprising a shaft, means at one end of the shaft for affixing a line thereto, body member connected to the other end of the shaft, hook means connected to the body member, and a spinner rotatably mounted on the shaft, the spinner comprising a blank or strip of flat material formed into a cylindrical body portion, the axis of the imaginary cylinder of which the spinner is a peripheral portion being disposed at an acute angle with respect to the longitudinal center line of the spinner. In the preferred form a bearing member having an aperture therethrough is affixed to a central portion of the spinner with the aperture of the bearing member being superposed over an aperture provided in the blank, the axis of the aperture being disposed at an acute angle with respect to the center line of the spinner and adapted to be journalled over the shaft.

Abstract: A process for rapidly dewatering and drying calcium sulfate hemihydrate in a centrifuging and flash drying operation by ejecting the wet solids from the centrifuge bowl directly into the flash dryer's high velocity, high volume, heated air stream.

Abstract: Substrates such as metal, plastic, hardboard and plywood may be coated with a translucent film of a filled acrylic resin so that a decorative stain may be applied. The filler in the acrylic resin is an extender pigment having a mean particle size of from about 5 to about 7 microns.

Abstract: A process for adsorbing sulfur dioxide from a gas comprising contacting a gas containing SO.sub.2, such as a flue gas, with about stoichiometric amounts of a specially prepared calcium oxide so that substantially all of the sulfur dioxide content is reacted throughout the calcium oxide particle to form a calcium sulfate reaction product. The useful calcium oxide particles comprise a highly voided skeletal structure of very large surface area and large pore volume with numerous macro pores. Such particles are obtained by flash calcining sand-size grains of calcium carbonate, such as aragonite, calcite or dolomite.

Abstract: A wet process for producing phosphoric acid and phosphohemihydrate by acidulation of phosphate rock. A strong phosphoric acid is obtained with concomitant production of an improved calcium sulfate that is extremely low in radioactivity by operation in Region II for shorter time so as to produce small sized hemihydrate particles, then hydration of a substantial proportion but less than all of the hemihydrate to coarse gypsum substantially free of radioactivity in a dilute acidic aqueous slurry at a temperature and P.sub.2 O.sub.5 concentration selected so as to be within Region I of FIG. 1 and having a substantial weight proportion of coarser gypsum particles that are substantially free of radioactivity.