Abstract: A process for the reproduction of works of art made of a lithoid material including the use of a silicone rubber to obtain a negative mold of the work of art, wherein a thin layer of a fluorinated grease, based on polytetrafluoroethylene and a liquid perfluoropolyether, is first applied to the work of art.

Abstract: A method of making a mold used in a pressure slip casting process, including the steps of: preparing at least two porous bodies each defining a filter layer having a plurality of channels formed therein for allowing water and air to flow therethrough; placing a reinforcing iron frame and one of the porous bodies on a bottom board with a parting agent applied to its surface; applying a sealing resin to the surface of the other porous body opposite to a molding surface thereof and to a portion of the surface of the bottom board between the box and the porous body; filling up the space between one of the porous bodies and the reinforcing iron frame with a filler; and preparing a second part of the pressure mold.

Abstract: Method for manufacturing glazed cement products of a foam light-weight aggregate, reinforcing steel under pretension or a stress-absorbing layer around the reinforcing steel. An action of generating crack, caused by a difference of coefficient of thermal expansion between the reinforcing steel and a portion of cement material while burning and cooling are carried out, is absorbed by the foam light-weight aggregate, the stress-absorbing layer or pretension given to the reinforcing steel. A reaction of unreacted cement component is promoted by the hydration to harden for recovering mechanical strength.

Abstract: A concrete structural member of improved stability is produced by preparing a concrete composite layer having a concrete layer on one side and an aggregate layer on the other side thereof, impregnating the composite layer with a monomer, thermally or catalytically polymerizing the monomer impregnated in the composite layer, and thereafter placing fresh concrete on the aggregate layer side of the polymer-impregnated composite layer.

Abstract: Disclosed herein is a preferred process for making a catalyst. A catalyst such as is named in the title of this invention. The process begins with the chosing and blending the different refractories in order to necessitate the longevity of the damper. The mixing of the materials, with water, to the right consistency is very important in this process. To much moisture in the material will not provide the necessary porosity the catalyst needs. After mixing, the dampened material is placed into a two piece break away mold and pressed into the desired shape, size and density. The proper amount of curing time and the damp cool area in which the curing is to take place also adds to the longevity of the damper. The object of this invention is to provide an inexpensive process that doesn't require heat, for manufacturing a catalyst that will not become contaminated or less active with use, but by it's causing a more complete combustion, will create a higher BTU output and a decrease in fuel consumption.

Abstract: A method for producing .alpha.-silicon nitride whiskers. Silicon is blended with amorphous silicon nitride and a pore-forming composition particles able to be removed without leaving a residue, such as naphthalene particles. The mixture is compacted to a desired shape, after which the pore-forming particles are removed from the mixture to form a porous silicon precursor compact having the desired shape. The silicon precursor is reacted with a substance that releases free nitrogen, such as nitrogen or dry ammonia. The reaction is carried out at a temperature sufficiently high to form an identically shaped porous compact of .alpha.-silicon nitride whiskers but sufficiently low to avoid subliming substantially all of the formed whiskers. Preferably, the reaction is carried out in a range between about 1100.degree. C. and 1500.degree. C. The shaped porous compact of .alpha.

Abstract: A method for adjusting blocks in the height which comprises laying over the top sides of the blocks an amount of a material which is hardenable and bindable thereon, with a height which is higher than the difference between said predetermined height and the actual height of the block under consideration, and levelling thereafter said material over said block sides before hardening thereof until the total block height formed by the sum of said block height and said material height, substantially corresponds to said predetermined height.

Abstract: An apparatus for treating the edges of pre-fired brick includes an extruder for extruding a column of clay and a wire cutter assembly for severing the column into individual bricks having their longitudinal axes substantially perpendicular to the direction of extrusion. The bricks are transported to a first conveyor where they are turned and directed to a side conveyor. As the pre-fired bricks move on the side conveyor, they move in a single file arrangement with their longitudinal axes substantially parallel to the direction of movement. The upper longitudinal edges of the pre-fired brick are treated by engagement with a pair of canted rollers to give the edges of the brick an irregular appearance. The bricks are then reoriented by a pair of rotating tables which direct the bricks onto a third conveyor with the axes of the brick being substantially perpendicular to their direction of travel.

Abstract: A process for the production of a vulcanized latex protective coating bonded to the surface of an asbestos-cement article, particularly a pipe, is disclosed. The process includes a step whereby the latex coating is applied before autoclaving to the article, and becomes a hard, protective bonded layer during the autoclaving process.

Abstract: A process for the production of decorated molded articles wherein a base article is produced by casting and/or compression molding from a hardenable substance containing a minor amount of a thermosetting synthetic resin and a hardener therefor, and a major amount of at least one inert filler, and, optionally, accelerators, colorants and other auxiliary materials and by providing the article with a surface layer of hardenable lacquer resin.

Abstract: A method of surface treatment for plaster articles to improve wear and water resistance is disclosed. The method includes the step of forming the article, allowing the article to set, drying to remove excess water, applying a coat of substantially molten Candelilla wax onto an exterior surface of said article, maintaining said wax at a temperature of no less than 155.degree. F. (68.degree. C.) for sufficient period of time to allow said wax to substantially fill exterior pores and irregularities, and cooling said article to solidify the wax. Also disclosed is a wear resistant and water repellent plaster article comprising a formed plaster article having an exterior surface portion thereof coated with a thin layer of Candelilla wax, said coated surface portion providing a substantially water impregnable barrier and providing enhanced wear resistance.

Abstract: A lightweight and highly dimensionally accurate molded resin concrete product essentially comprises an intermediate layer composed of resin concrete having a resin content of about 10 to 70%, and a thickness which is not greater than 20/1,000 of its maximum length, and a pair of reinforcing layers composed of a fiber reinforced plastic, and between which the resin concrete layer is sandwiched. The product having a very small wall thickness, and high hot water resistance is particularly useful as a bathtub, or the like. Disclosed also is a method of making such a molded resin concrete product.

Abstract: A process for forming a glazed ceramic substrate, more particularly for forming a particular surface finish and/or surface pattern in the glass. The process consists of preparing a ceramic mixture which includes a basic oxide, such as Al.sub.2 O.sub.3, and a glass, forming the substrate as by molding, pressing, or doctor blading and lamination, and sintering in a non-reactive atmosphere on a setter tile that is non-wettable by the glass. During the sintering operation the glass becomes molten and flows downwardly under the influence of gravity through the ceramic particles. The glass flows to the setter plate to conform to its surface configuration, forming a glazed surface on the substrate.

Abstract: A block is formed from uncured grains of refractory material. The block is sintered to fully cure the block which, as sintered, has pores extending inwardly from the surface of the block. The fully cured block is soaked in a first liquid to impregnate the block with the first liquid which, upon heating, forms into a material which at least partially fills the pores, and the filling material is compatible with the original refractory material of the block. The block is then soaked in a second liquid containing very fine particles of refractory material which are deposited in the partially filled pores. Upon heating, the very fine particles are reacted with a compound at least part of which originates with the first liquid to form a reaction product which further fills the pores. These procedures enhance the resistance of the block to slag penetration.

Abstract: A method of making a multi-layer ceramic substrate for an integrated circuit device package having internal circuitry by forming a plurality of porous ceramic bisque sheets, impregnating the pores of the bisque sheets with an organic binder material, forming openings through the impregnated bisque sheets, filling the openings with conductive material and imprinting conductive circuitry patterns on the surface of the impregnated bisque sheets of a conductive material, assembling the plurality of apertured printed impregnated bisque sheets into a laminated unit, and sintering the laminated unit to form a unitary laminated structure having an interconnected internal circuitry system.

Abstract: A pipe lining apparatus includes a distributor head which throws cement mortar centrifugally against the interior of a pipe, a trowel which smooths the cement mortar and a liquid coating spray applicator which applies a curing control substance to the trowelled lining. The spray applicator comprises an air atomizing device which produces a very fine coating spray and blows it onto the freshly applied mortar lining without disturbing the lining. Also, in one embodiment the coating spray application is mounted to swing laterally with the trowel so as to be maintained centrally in the pipe.

Abstract: A method of making a concrete tile is disclosed wherein a formed tile body having a moisture content of less than eight percent is coated with a cementitious slurry and before that slurry layer has cured, an aqueous emulsion of a film forming polymeric material is applied to the form tile.

Abstract: A process for the manufacture of fire protection materials, in which an aqueous alkali metal silicate solution is dried to a water content of from 6 to 40% and the resulting powder is thermoplastically molded to form sheets, tapes or strips. These can be fitted into openings and passages of building units; in the event of a fire they eliminate water and form a stable, heat-insulating foam.

Abstract: A method of manufacturing an O-ring type optical waveguide wherein a layer of fused silica is formed on the smooth cylindrical surface of an elongated member of fused silica and thereafter a thin layer of doped fused silica having an index of refraction greater than that of said fused silica is formed over said layer of fused silica. A second layer of fused silica is then formed over the layer of doped fused silica and the composite structure is heated to its drawing temperatures and drawn to reduce the cross sectioned area thereof to form an optical waveguide having a cylindrical layer of higher refractive index interposed between a core and an outer cylindrical layer of lesser refractive index.

Abstract: Silicon carbide sintered moldings having a high strength and a high oxidation resistance at high temperatures are produced by mixing SiC matrix powders with a binder consisting of an organosilicon high molecular weight compound having silicon and carbon as the main skeleton components and containing at least one foreign element other than silicon, carbon, hydrogen and oxygen, molding the mixture into the desired shape and baking the formed molding at high temperatures.

Abstract: A cement panel reinforced with fibers comprising a base plate composed predominantly of inorganic fibers and a cement, an inner waterproof layer of a synthetic resin formed on a surface of the base plate, a coloring material layer composed predominantly of a cement and a pigment and formed on the inner waterproof layer, and a surface waterproof layer of a synthetic resin formed on the coloring material layer. The synthetic resin of the inner waterproof layer, having penetrated into both the base plate and the coloring material layer and solidified, gives a fastener effect, bonding them together.

Abstract: A masonry method uniquely adapted for repairing structures constructed of adobe members whereby the broken or eroded portion of disfigured members is removed from the structure to create a void and expose an interface, the interface is cleaned, the cleaned interface is painted with a coating composition; the void is packed with a filling which intimately engages said coated interface and extends therefrom in a mass which is shaped to recreate the contour of the original adobe member; and the shaped mass is painted with said coating composition and allowed to cure. The coating composition comprises a modified acetate homopolymer formed in an emulsion having between 55.0 and 57.0 percent total solids, a mean particle size of 5 microns, a viscosity of between 500-1000 Cps, a pH of from 5.5 to 7.0 and diluted with an equal volume of water.

Abstract: The present invention provides a novel cellular ceramic catalyst support. The support consists of a random-fiber ceramic framework having a high surface area. The support is fabricated by flocking an organic sponge with wood or textile fibers, and impregnating the flocked sponge with a high alumina slurry containing a silicone resin and a flux. The impregnated organic sponge is sintered at a high temperature to burn out the organic sponge material. A fired high-silica glaze can be applied to the sintered article, followed by a second sintering step. A second glaze containing from 10-25 parts by weight CuO and from 10-25 parts by weight ZrO.sub.2, can be applied, followed by a 2000.degree. F. sintering step. The high temperature causes recrystallization of the CuO onto the surface of the catalyst support thereby increasing the surface area. The glazed surface can be plated with copper or nickel and combinations thereof to function as a reducing unit in a catalytic converter.

Abstract: A novel manufacturing method wherein the material has water-insoluble and moisture-absorbing properties, is noncombustible and smokeless, and comprises a pattern-surfaced base material, composed of a mixture of foamed inorganic substances and inorganic adhesive which renders the inorganic substances water-insoluble, shaped by molding the mixture under heating and pressure, and a coating of glaze material applied to the base material and having a multitude of micropores formed thereon. The method consists of mixing foamed inorganic substances with inorganic adhesive of a character which renders the inorganic substances water-insoluble, molding the mixture under heating and pressure to a pattern-surfaced base material, applying a coating of engobe material to the surface of the base material and then a coating of glaze material, and obtaining a product having a multitude of micropores formed thereon through a baking process.

Abstract: A method of making a cast article from a composition which contains a hydraulic binding agent comprising by weight from 90% to 10% calcined gypsum and from 10% to 90% Portland cement comprises mixing the composition with water to produce a fluid mixture, either the water or some at least of the components of the composition or both being heated so that the mixture has a temperature of from 70.degree. to 130.degree. F, and pouring the fluid mixture into a mould or other supporting device where the reaction of the calcined gypsum with the water causes the mixture to set and the heat of this reaction causes the temperature of the mixture to begin to rise. As soon as the mixture has set sufficiently to be self supporting, the set mixture, which forms the cast article, is removed from the mould or other supporting device and then the dissipation of both heat and moisture from the cast article is controlled so that the temperature of the article continues to rise to from 90.degree. to 180.degree. F.

Abstract: A two-phase material of foamed cement or concrete and polymer providing thermal insulating, structural elements composed of an unimpregnated foam cement or concrete core and impregnated surface regions of the two-phase material and method employing a hydraulic head or vacuum means to provide high polymer loading through a large volume of foam voids in the cement or concrete for easy impregnation of high viscosity monomers and uncured resins to a considerable depth below the surface of the cement or concrete before in situ polymerization.

Abstract: Expanded perlite particles and vermiculite particles are treated with an acid solution and then with waterglass. The moist material is introduced into any insulating cavity and allowed to dry, whereupon it self-adheres into a solid insulating sheet which also adheres to the surrounding cavity surfaces. The moist material is also used to make molded articles which are then treated further with an acid solution to render them stable.