Abstract: In a method of manufacturing sintered dolomite having raw densities exceeding about 3.0 grams per cubic centimeter in a shaft kiln from ground raw dolomite briquetted or pelletized into shaped bodies, the steps include deacidifying and heating the shaped bodies to a temperature of at least 1000.degree. C. in an upper region of the shaft kiln in a preheating and deacidifying zone heated with fuels of a low thermal content, thereafter sintering the shaped bodies in a lower sintering zone heated with fuels of high thermal content, so as to heat the shaped bodies to a temperature of about 1600.degree. C. to about 2000.degree. C., and subsequently passing the sintered bodies into a lower cooling zone, cooling the bodies therein, and, thereafter, discharging the sintered bodies from the shaft kiln.

Abstract: Apparatus for cooling plastic film or sheet obtained by blowing tubing, comprising at its intermediate section an intensive blowing ring for directing air towards the tubing and at its upper section an upper chamber in which the tubing is in contact with an air flow directed in the drawing direction of the tubing. At the lower section of the apparatus is a non-closed lower chamber provided with at least one opening. The apparatus can be used to form blown films having superior optical properties, particularly clarity and turbidity, from a large number of resins.

Abstract: A method of making panels of composite wood material in a wet process includes depositing a layer of wet composite wood material in a mat on a press wire screen mesh and moving the screen mesh to carry the mat into a pressing position between a pair of spaced apart pressure plates having generally matching, contoured facing surfaces for shaping the outer face and a smoothly contoured back face of the panel. The pressure plates are moved toward one another compressing the mat of wet material and biasing the supporting screen mesh to conform generally to the contour of one of the pressure plates. After a suitable time interval for molding, the pressure plates are moved apart and the press wire screen mesh is rewound on a roll to aid in separating the completed panel from the mesh. The finished panel is carried by the screen mesh away from the pressure plates for unloading as the screen is rolled up and the deformations formed in the screen during molding are flattened out as the screen is rewound on the roll.

Abstract: The invention provides that in inserting a resin impregnated liner into a pipeline or passageway and shaping same to the passageway surface, followed by curing of the resin to form a rigid lining inside the pipeline or passageway, there are placed in the passageway reinforcing circumferential coils or members which bond to the liner and provide extra resistance to compressive hoop stress.

Abstract: In a submarine cable optical fibre regenerator housing a copper tail pipe (optionally with a brass end section incorporating an anti-extrusion profile for fitting inside a gland) is provided with a tight fitting length of thermoplastics sleeving by collapsing a thermoplastics preform down onto the tail pipe using heat and air pressure applied to the outside of an elastomeric tube into which the tail pipe and preform have been inserted.

Abstract: A method is provided for producing a polymeric heat exchange panel of the type including a sheet with a multiplicity of longitudinally extending passages and a plurality of juxtaposed dividing walls respectively disposed between adjacent longitudinal passages, wherein each end of the passages is closed to define a manifold space and at least one of an inlet and an outlet communicates with at least one of the manifold spaces. The method includes forming at least one of the manifold spaces by severing longitudinally without substantial removal of dividing wall material said plurality of juxtaposed dividing walls toward and end of the sheet to form severed opposed sides thereof. The method further includes plasticizing the severed opposed sides of the sheet at an elevated temperature and molding the opposed sides together at end edges thereof to form a molded end wall having a longitudinal dimension substantially greater than a thickness of a wall of the sheet.

Abstract: In order to provide enough permeability (air or liquid throughput) in a pus molded body of carbon made from a mixture of carbon powder and a binder, a first "green" body (a body of the kind that has been fired heretofore, in its green state before firing) is broken up into small pieces with the help of a jaw crusher in a manner providing coarse particles and a fraction of uniform size (largest particle diameter not more than twice the smallest) in the overall range between 0.2 and 10 mm effective diameter is used to make a second green body of molded shape by placing it in a die and applying a pressure which may be light or heavier according to the desired degree of permeability. The second green body is then coked in vacuum or in an inert atmosphere at a temperature in the range between 600.degree. to 1000.degree. C. to produce a strong body through which gas and liquid may pass with a facility far exceeding what has been accomplished before with a body of comparable strength.

Abstract: A process is described of coating the interior wall of a mould heated at a temperature of 130.degree. to 180.degree. C. with a dry powder of an aminoplast or phenoplast resin, in particular melamine-formaldehyde, having a grain size distribution of 10 to 100.mu., whose particles gel in contact with the walls without running, then introducing into the mould a moulding composition comprising a thermosetting resin, mineral fillers and a catalyst, hardening and polymerizing by heat and pressure the contents of the mould and releasing the article whose coating is solidly anchored in the moulding composition.Sanitary ware articles of polyester-based substrate and melamine-formaldehyde-based coating, and refrigerator boxes consisting of polyurethane foam substrate and melamine-formaldehyde coating can be produced.

Abstract: The present invention relates to a method of making a tape suitable for impregnation into a porous metal matrix which generally comprises the steps of mixing a liquid dispersion of PTFE with a coagulant to form a paste, placing the paste between a layer of supporting material and a layer of filter paper to form a sandwich, compressing the sandwich, transferring the sandwich to a gauze-like material so that the filter paper layer of the sandwich is adjacent the gauze-like material, applying a vacuum to the gauze-like material and adjacent filter paper layer to remove some excess liquid from the paste, and removing the layer of filter paper from the sandwich to leave a tape comprising PTFE and liquid and a layer of supporting material adjacent the tape. The method of the present invention may be used to apply, by impregnation, a PTFE based composition, which may include various fillers therein, to a porous metal matrix or interlayer.

Abstract: A method of producing a smooth surface on a premolded glass fiber mat reinforced plastic panel where protruding fibers would otherwise produce a rough surface. The method is practiced by coating the surface of a premolded glass fiber mat reinforced plastic panel maintained at room temperature with a room temperature curable polyurethane composition, and applying molding pressure on the coated surface to cause the coating resin to flow and fill the valleys between the protruding fibers. The molding pressure is released while the coating resin is still in its fluid state. A finished, smooth panel is made by this process which can be readily painted and used as an automotive exterior body panel. Optionally, a layer of a predecorated sheet material can first be placed in the upper mold cavity of a mold, then compressed against a premolded panel positioned in the lower mold cavity with a layer of coating resin sandwiched in between.

Abstract: A method is provided for making a plastic-filled wire rope by preheating a lubricated wire rope to a temperature close to the melting point of the plastic material with which the rope is to be filled, and then injecting the plastic material in molten state under heat and pressure into the wire rope so as to fill essentially completely the interstices between the strands and the individual wires, while displacing and removing most of the lubricant initially present within the rope. The obtained novel plastic-filled, lubricated wire rope has improved wear and fatigue resistance as well as increased life.

Abstract: A pyroelectric and isotropic piezoelectric polymeric film, the film being formed from a blend of polyvinylidene fluoride and at least one polymer miscible therewith at a temperature above the melting point of the polyvinylidene fluoride, and a process for preparing the film comprising forming the film, heating it to a temperature sufficient to render the film substantially amorphous, cooling at a rate and to a temperature sufficient to prevent crystallization, and polarizing the film to render same pyroelectric and isotropically piezoelectric.

Abstract: Very large tools can be cast-to-size by making a pattern of the article to be formed by the tool, laying the pattern up in a pattern box, applying a release coat and coating the pattern and box with a tough, curable tool surface layer. A small amount of epoxy filled with a thermally conductive particulate filler is cast into the pattern box before the surface layer fully cures. Relatively large chunks of thermally conductive material are added to the box which are covered with additional cast epoxy. The cure of the epoxy is controlled to effect complete cure at room temperature within a few days but never to exceed a peak cure temperature above about 70.degree. C.

Abstract: There is disclosed a hand-held labeler with a thermographic print head for printing on labels releasably secured to a carrier web, a delaminator for delaminating printed labels, an applicator for applying printed labels, a web feeding mechanism including an electric motor for advancing the carrier web, a detachable handle containing a source of electrical energy, and circuitry including a plurality of printed circuit boards electrically connecting the electrical energy source, the keyboard and the print head.There is also disclosed a process of making a feed wheel for the labeler which includes molding a hub having external axial grooves, molding feed rings having external tooth and internal projections which are cooperable with the grooves in the hub in only one rotational position, and sliding the rings onto the hub.

Abstract: A technique for stabilizing an insulating liner formed of thermoplastic material which is injection molded onto the inner surface of a metal spool having a cylindrical body provided with end flanges, an annular gap being created between the liner and the spool body due to differential shrinkage between the liner and the body as the molded liner cools and solidifies. In order to fill this gap to prevent a change in the inner diameter of the liner when the liner is subjected to the pressure of a fluid flowing therethrough, the spool body is provided with ports which extend between the exterior and interior surfaces thereof. These ports are sealed during the injection-molding process by removable plugs. After injection-molding, the plugs are removed and a thermosetting resin is introduced into one of the ports until the gap is filled as evidenced by the fact that the resin begins to rise in the other ports, the resin then being cured to solidify the filler.

Abstract: The invention relates to a process for the mass-production conversion of an inorganic and/or organic material, containing a liquid fraction of between 3 and 90% by weight, to a blank by means of core casting and/or hollow casing, the material being introduced into a cavity located between at least two porous mould portions and being dewatered in contact with the adjacent mould portions.

Abstract: The present invention is a method of making fiber reinforced composite articles using match molds to compact a partially hollow fiber/matrix lay-up. The method comprises wrapping the matrix and fiber reinforcement about a mandrel, removing the mandrel from the lay-up or chilling the wrapped mandrel allowing for easy removal of the mandrel resulting in a relatively stiff hollow lay-up. The lay-up is then placed in a mold and compacted and cured to form the desired composite article. Such a method provides an easy method to form such complex composite article shapes as I-beam, C-beam, etc.

Abstract: An integral plastics material starting sheet has a square or rectangular pattern of holes defining strand-forming zones. The strand-forming zones are formed with depressions with the sheet at a low or ambient temperature. The sheet is then stretched to form the strand-forming into orientated strands.

Abstract: The present invention relates to a continuous method for manufacturing an electret filter medium from dielectric material having an open or porous structure, said method comprising the steps of continuously feeding a web of dielectric material with a substantially closed dielectric foil adjacent to at least one major face thereof into a corona discharge device, reducing the thickness of the web of dielectric material and charging the web of reduced thickness dielectric material by means of a corona discharge and to apparatus for carrying out said method.

Abstract: A method of producing ceramic items which does not necessitate the use of high vapor pressure organic solvents, aqueous solvents, binders or plasticizers. A monomer is used as a vehicle for deflocculation of the ceramic powder and, after forming, is polymerized to form a matrix which binds the ceramic particles together.