Abstract: In an apparatus for forming a row of zigzag coupling elements, a winding unit includes a guide plate having a guide hole through which a monofilament is supplied onto a periphery of a continuously rotating die wheel. The guide plate is driven by two separate drive mechanisms, for lateral reciprocating movement and tangential reciprocating movement, respectively, with respect to the die wheel periphery so that the guide hole traces a horizontal figure-eight curve to thereby wind the monofilament alternately around a pair of rows of circumferentially staggered pins, on the die wheel periphery.

Abstract: Gas supply passages can be formed accurately in a ceramic member by a ceramic member machining method comprising irradiating laser beams to a ceramic member thereby forming gas supply passages in the member.

Abstract: A mold for synthetic resin products which are to be shaped while soft, includes a pair of elongated mold parts each having opposed complementary faces with contours at least partially conforming to at least parts of the product to be shaped. A support means on which the mold parts are mounted provide for moving at least one of the mold parts relative to the other mold part to effect removal therefrom of a finished product. The mold parts are constructed and arranged so as to be bendable along their longitudinal axes to effect a change in arcuate configuration, the mold parts being made of a material which facilitates sliding of the synthetic resin product through the mold, the support means supporting the mold parts in fixed spaced apart disposition as the product is moved longitudinally between the mold parts to thereby impart to the product an arcuate configuration corresponding to the arcuate configuration of the mold parts.

Abstract: Interlocking vinyl siding panels are formed from vinyl sheets. A sheet of vinyl is extruded with a V-shaped bend along one of its edges, and a Z-shaped bend intermediate its edges. The extruded sheet of vinyl is then formed, while in a hot, semi-viscous state into the final siding profile. As the siding profile is formed, the V-shaped bend is formed into a first locking profile and the Z-shaped bend is formed into a second locking profile. The first locking profile is dimensioned for a snap-type engagement with the second locking profile of another similarly formed siding member.

Abstract: An alumina-carbon shape is manufactured from a composition comprising 1-8 weight percent fine silicon, 1-16 weight percent reactive alumina, 1-30 weight percent calcined fluidized bed coke, 1-30 weight percent of a spalling inhibiting additive, and the balance of the mix synthetic alumina, plus the additions of 5-10 weight percent of a high carbon yielding resin as a molding vehicle and 0.5-4 weight percent solvent, and up to 2 weight percent of a low temperature curing agent, such as, paraformaldehyde or hydrochloric acid. The mix is formed at ambient temperature into a shape through an injection molding process. Solidification is accomplished by curing in the mold at a temperature less than 100.degree. C. After stripping the shape from the mold, the solvents are removed from the shape by drying at a temperature above 100.degree. C. The shapes are then heated to a temperature above 550.degree. C. to coke the resin.

Abstract: The process for producing a vitreous carbon involves the molded product of a moldable composition produced from co-reacted mixtures of powder or otherwise blendable form of 20-80% by weight of a phenolic-furfuraldehyde Novolac resin and of 20-80% by weight of phenolic-aldehyde resol resin dispersed in water, either in solution or suspension, the percentages being based on the combined weight of the Novolac and resol resins, and the aldehyde in said Novolac resin comprising at least 50 molar percent, preferably substantially 100 percent, furfuraldehyde. The composition advantageously contains an amine such as hexamethylenetetramine ("hexa") in an amount equivalent to 1-15%, preferably 2-10% of hexamethylenetetramine based on the total amount of phenolic component. The composition is made by adding the preformed phenol-furfuraldehyde Novolac to the resol resin prior to dehydration of the resol resin to produce a grafted polymerization product of improved properties.

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: An oxidation resistant carbon-carbon composite (31) including a plurality of graphite fibers (13) within a carbonized (graphitized) matrix (14). A first material including boron (16) and a second material including silicon (18) are applied thereto. Heating the composite in the course of service use to a temperature at which the composite cracks enables the boron and silicon to combine to provide a borosilicate sealant of sufficiently low viscosity for sealing cracks in the composite.

Abstract: The present invention relates to a method for continuous production of elongated carbon bodies having substantial uniform cross-section where a casing filled with unbaked carbonaceous electrode paste is slowly and substantially continuously lowered down through a baking furnace having an external energy supply. The casing is perforated in order to allow baking gases to flow from the electrode paste and into the baking furnace. Air for combustion of the baking gases is supplied to the baking furnace in an amount necessary for combustion of the baking gases which flow into the baking furnace. The external energy supplied to the baking furnace is controlled in such a way that the total amount of external energy supplied to the baking furnace and the energy generated by combustion of the baking gases inside the baking furnace is sufficient to maintain a temperature inside the baking furnace of 700.degree.-1300.degree. C., preferably 900.degree.-1100.degree. C.

Abstract: Elastomers are plasticized with a polymerizable monomer, in homogeneous admixture therewith, by adding the monomer to a latex of the elastomer, free of polymerization initiator, followed by coagulation of the monomer and polymer solids. The coagulated solids recovered from the latex may be compounded with a polymerization initiator for the monomer and a vulcanizing agent for the polymer and, optionally, an inorganic filler, and shaped into the desired product form. Polymerization of the polymer and vulcanization of the elastomeric polymer are initiated after shaping.

Abstract: A molded porous silicon carbide body in the shape of an armor plate, made by coking a mixture of carbon and silicon powder coated with an organic binder to which some silicon carbide powder may be added, and then rapidly raising the temperature to a level at which silicon carbide is formed, is impregnated so that its pores are filled with steel or a steel alloy to produce a plate that has the hardness and stiffness of silicon carbide and the toughness of metal. The plate has superior resistance to hollow or shaped explosive charges. The lower density provided by the silicon carbide favors its use in armored vehicles.

Abstract: The production of a reaction-bonded silicon carbide artefact by siliconizing a green body comprising a coherent mixture of carbon and silicon carbide particles includes the step of forming a layer of carbon of open cellular structure on the green body by carbonization of a sleeve or tube on the green body by carbonization of a sleeve or tube of carbonaceous material in contact with the body. This material may be impregnated with particulate silicon suspended in water or a paste. The material may be a quilted or woven fabric of fibrous material or it may be in the form of paper. The material is in a flexible strip or sheet form to enable it to be wrapped around the green body or a former about which the green body is to be formed.

Abstract: A tamper-evident closure is provided which includes a threaded cap and tamper-indicating means having upwardly and inwardly folded tabs which lock against the lower surface of an annular shoulder on a container neck to retain the tamper-indicating means on the neck as the cap is removed. The tamper-indicating means includes a ring to which the tabs are integrally connected at their lower outer ends. The tabs are resilient and are flexed by the container finish at the joints where they are joined to the ring. The closure of the present invention may be installed simply by screwing it onto a container neck in a one-step process. The flexible tabs assist in guiding the closure and centering it as it is lowered onto the container neck for installing and do not require the holding of the closure or the container finish to close tolerances in order to be consistently effective.

Abstract: When a molded, porous carbon article for use as a sliding material for bearing, etc. is maintained in a stream or atmosphere of a fluorine gas or a fluorine gas diluted with an inert gas, the surface of the article is treated with the fluorine gas, and considerable lowering of friction coefficient and considerable reduction in abrasion at the sliding can be attained.

Abstract: Non-permeable carbonized formed bodies consisting of carbonaceous material containing 5-50 wt % of graphite and the balance of glassy carbon formed by bake-carbonization of a thermosetting resin, and a method for producing such non-permeable carbonized formed bodies comprising mixing and kneading a thermosetting resin powder, thermosetting resin liquid and graphite powder, drying, hardening and bake-carbonizing the resultant body is disclosed.

Abstract: This invention relates to a method for the preparation of improved tiles or plates of enhanced density, freedom from defects, chemical and mechanical resistance, and increased longevity in service, for use as aluminum-wettable cathode surfaces for aluminum reduction cells. A mixture of Refractory Hard Material, carbonaceous filler, carbonaceous additive, and thermosetting binder system is subjected to vacuum during mixing so as to achieve a specified penetration depth as measured by ASTM standard C 360-63. The mixed composition is then molded, cured, and baked to form elements of the desired configuration.

Abstract: Continuous strips of a first material, e.g., elastic strips, are continuously supplied to flexible strip supports in a supply zone while the strip supports are in a linear configuration. The strip supports are carried on respective transfer members which are mounted on a rotatable support so that individual transfer members follow a closed (orbital) path upon rotation of the support. The continuous strips are cut into discrete strips adhered to respective flexible strip supports whose configuration, and that of the discrete strips adhered thereto, is then changed to a desired curvilinear configuration. The transfer members are then brought into transfer contact in a transfer zone with a moving web of second material, which may comprise the backing sheet of a disposable diaper construction, and the curvilinear strips are transferred to the web.

Abstract: A composite, single material, one-piece turbomachinery rotor constructed of fibers bonded in a matrix is disclosed together with a method of manufacture thereof.

Abstract: An anodic assembly immersible in a fluoborate electrolytic bath in an electroplating process for plating tin and similar metals. The assembly is constituted by a cylindrical basket containing a replenishable pile of solid pieces of the plating metal, the basket being formed by a perforated carbon tube closed at its bottom by a carbon plug. The outer surface of the tube is impregnated with a resin acting as a reinforcing skin to prevent cracking when the tube is drilled to create the required perforations.

Abstract: Disclosed is a method of making carbon/carbon composites by pyrolytic conversion of a carbonizable liquid in a pre-formed graphite body to form an amorphous carbon reinforcing matrix. Graphite fabric saturated with a carbonizable liquid is formed into the shape of the desired end product body and placed in a flexible bag. The bag is evacuated to compress the formed body and the bagged body subjected to external pressure and heated. When the carbonizable liquid is heated to the curing temperature, the external pressure is reduced, causing volatile materials in the liquid to expand and form an interconnected pore structure. The formed body is thereafter heated to a temperature in excess of the curing temperature to further remove volatile materials therefrom. The cured rigid body is then transferred to a pyrolyzing furnace and rapidly heated in an inert gaseous environment directly to about 1500.degree. F. to pyrolyze the carbonizable material and form an amorphous carbon matrix.

Abstract: Method for the manufacture of an electrochemical storage cell of the sodium and sulfur type, with at least one anode space and one cathode space as well as an alkali ion conducting solid electrolyte separating the two, where at least one cathodic current collector and one electron-conducting matrix material are arranged in the cathode space. The invention is characterized by the features that in the cathode space at least one strongly anisotropic felt is inserted with the principal fiber direction parallel to the solid electrolyte; the felt is impregnated with at least one dissolved duromer; and thereupon a larger amount of the duromer is collected in the vicinity of the cathodic current collector; and the duromer is subsequently coked.

Abstract: A method for making curved hose using a curved mandrel by applying a melted material to an inside surface of an uncured hose and solidifying the material. The material is remeltable and forms a lubricant when the hose is pushed onto and removed from a hot curved mandrel.

Abstract: A method and apparatus for manufacturing a cup formed of a thermoplastic resin foamed sheet material and having a lip, the side wall and bottom of the cup being integrally formed, the lip extending outwardly from the mouth portion of the cup and being bent at its end radially inwardly towards the side wall. The method includes forming a rim extending outward from the mouth portion of the cup and having a downwardly extending end, providing a bending furrow on the outer periphery of the side wall at a level below the rim, and bending the rim, as it is heated, at the bending furrow. The apparatus comprises a mandrel block adapted to hold cups and rotatable and axially slidable, a hot blade or cutting blade movable toward the mandrel block and adapted to form a bending furrow for bending the rim, and a lip forming tool having a lip forming groove adapted to be heated.

Abstract: Disclosed is a process for introducing elemental silver in graphite by blending a silver compound with graphite, mixing the same with dissolved pitch to form a mix, shaping the mix to any desired shape and size and baking at high temperature to form the finished article which contains a uniformly distributed and predictable silver level.

Abstract: A process for the manufacture of molded carbon bodies directly from high-boiling aromatic hydrocarbon fractions derived from coal or mineral oil, without additional binding agents and without using high pressures, is disclosed. Molds are filled with the starting material, distillation residues from the working-up of coal tar or pyrolysis products, these residues having a softening point (KS) in excess of 40.degree. C. and a quinoline-insoluble content (QI)<1.0%, and being in the liquid state, or in the solid state, and are heated, in the first step up to 550.degree. C., the residues being converted into "green" coke. In the second step, the coke is heated up to at least 800.degree. C. at a heating rate, depending on the diameter d (m), of 1.2.times.1/d.sup.2 K/day. The molded bodies can be impregnated and graphitized. They are distinguished by high electrical conductivity, low thermal expansion, and high strength in the axial direction.

Abstract: What is disclosed is a process for preparing a silicon nitride-containing ceramic material from a R.sub.3 SiNH-containing silazane polymer, which has been rendered infusible by treatment with certain reactive metal halides, by heating the infusible silazane polymer to an elevated temperature under an inert atmosphere. Suitable reactive metal halides are of the general formula MX.sub.n or R.sub.b SiX.sub.(4-b) where M is a metal atom of valence n, X is chlorine or bromine, R is selected from the group consisting of vinyl, hydrogen, phenyl, and alkyl radicals containing 1 to 3 carbon atoms, and b has a value of 0, 1, or 2. Preferred reactive metal halides are SiCl.sub.4 and HSiCl.sub.3.

Abstract: A porous green-state body of carbon, with or without silicon carbide, made with a cokable binder, is crumbled to produce relatively coarse grains in the range from 0.2 to 10 mm and a fraction of the particles so produced with a much more limited range of grain size is then used to produce a second green-state body, which is then coked, siliconized if the silicon is not already provided in the making of the precursor body that was broken up, and converted into a silicon carbide body. If the siliconizing is done by immersion in a bath of molten silicon, the excess silicon is removed by vaporization or by boiling in sodium hydroxide solution.

Abstract: A method for the high temperature, high pressure impregnation of thick woven carbon substrates with pitches to form carbon impregnated carbon bodies. The use of pitch with high (about 30%) levels of free carbon as the impregnating pitch reduces the number of cycles to obtain a product of given density as compared to carbon free pitch. The impregnation is conducted in hydrogen permeable aneroid vessels.

Abstract: The invention provides substantially pore-free sintered polycrystalline articles comprising .alpha.-silicon carbide, boron carbide and free carbon, the quantitative proportions of which, in percent by weight, are defined by the trapezoidal area having, in the ternary system B/Si/C of FIG. 1 the corner pointsa=89.0% B.sub.4 C, 9.9% .alpha.-Sic, 1.1% Cb=9.9% B.sub.4 C, 89.0% .alpha.-SiC, 1.1% Cc=9.0% B.sub.4 C, 81.0% .alpha.-Sic, 10.0% Cd=81.0% B.sub.4 C, 9.0% .alpha.-SiC, 10.0% CThe articles have a density of at least 99% of the theoretical density, an average structural grain size of less than 20 .mu.m and a 4-point flexural strength of at least 400 N/mm.sup.2. They are manufactured from fine-grained mixtures of .alpha.-silicon carbide, boron carbide, carbon and/or material that can be coked to form carbon, in a two-stage sintering process. In the first stage, green bodies preshaped from the powder are subjected to pressureless sintering to a density of at least 95% TD at from 1950.degree. to 2150.degree. C.

Abstract: A method and apparatus for manufacturing bent pipes of a composite material composed of resin and filling materials such as reinforcing materials and aggregates by employing a cylindrical molding tool which is deformable between straight-axis form and bent-axis form. Materials are supplied into the molding tool held in horizontally straight condition while the tool is rotated about a horizontal axis, and are molded into a pipe by centrifugal molding. Rotation of the tool is stopped when the pipe molded therein is in uncured state, then the tool is subjected to bending. The resulting bent pipe is removed after it is cured. Before the tool is bent, a bag made of a flexible sheet material is inserted into the pipe and inflated to straighten out the inner periphery of the pipe so as to protect the pipe from any possibility of deformation during bending operation.

Abstract: Carbon electrodes are impregnated with pitch during transport in mobile vessels which first travel to a heating station where the electrodes are heated in several stages by gases which are hotter from stage to stage. The vessels next travels to a station where the sealed vessels are connected with a suction pump to evacuate the fluid from their interiors and from the pores of the electrodes therein and where the vessels are substantially filled with pitch which is caused to penetrate into the empty pores. The vessels then travel to a station where the contents of the vessels are pressurized to ensure complete permeation of electrodes with pitch. The vessels subsequently travel an optional station where the electrodes in the vessels are baked to convert the pitch into coke, and to one or more cooling stations where the electrodes are heated by air, water and/or nitrogen.

Abstract: A pierced fabric carbon-carbon structure is selectively loaded with a particulate material to provide resistance to erosion.

Abstract: The present invention relates to a process and device for the accelerated densification of a porous carbonaceous substrate, of the type consisting in decomposing a hydrocarbon substance in the presence of said substrate under high pressure and at high temperature, decomposition being effected inside a closed reactor allowing the elimination of the hydrogen emitted during the reaction as it is produced, the walls of said reactor having the necessary suppleness for the inner volume thereof to be adapted at any instant, under the effect of the pressure applied, to the volume of the liquid phase which it contains, wherein the hydrocarbon substance to be decomposed is chosen from the group comprising pitches, acenaphthylene, phenanthrene or mixtures of these products. The invention also relates to a process for preparing said substance.

Abstract: A single-piece plastic shotshell casing and method of making same comprising softening one end portion only of a tube of uniformly biaxially oriented high density polyethylene sufficiently for forming and until a dollup is formed, then telescoping only a portion of the dollup into the rigid sidewalls of the tube, and then forming the dollup into a substantially thickened integral transverse base section constituting a head with a longitudinally extending primer opening therein, the base section being substantially biaxially oriented and the rigid sidewalls terminating a substantial distance inwardly from the outer end of the base section.

Abstract: Refractory parts or articles, even of very large dimensions, are made with starting material of carbon particles mixed with silicon particles in a predetermined ratio which is suspended in a solution of a binder, after which the suspension is squirted into a precipitating liquid to coat the particles with the binder, the solids then being separated and dried, molded under slight pressure, and coked (at 800.degree.-1,000.degree. C.), and then rapidly raised in temperature (to 1,400.degree.-1,600.degree. C.) for formation of silicon carbide throughout the article. It is useful to add powdered silicon carbide and mix it in before the coking step and, also, to hold the heated body at a temperature somewhat below 1,400.degree. C. long enough to remove temperature gradients within it, followed by rapid heating up to a carbide-forming temperature.

Abstract: A packing arrangement for sealing an area about a shaft in a structural body includes a plurality of V-shaped packing rings in stacked alignment. The packing rings are made from a memory retainable material and preformed into the V-shaped configuration with a forming die. After being preformed, the V-shaped packing rings are compressed beyond their preformed configuration and placed in a packing chamber. The memory characteristics of the packing ring material are such that the rings are urged toward their preformed V-shape to compensate for any dimensional instability of the rings during thermal cycling. The packing rings also have a very small stack height and provide an increased number of sealing surfaces within a predetermined sealing area.

Abstract: Apparatus for constantly pulling and stripping a cord from a coiled disposition about a mandrel for moving the free cord in a direction substantially perpendicular to the path of movement of the cord on the mandrel. The apparatus includes a pinch roller assembly for pulling and stripping the cord and for both imparting movement to the cord in a downstream direction while the cord is immobilized rotationally at a transition point of pulling and driving of the cord. A reverse drive apparatus grips the cord and moves away from the pinch roller assembly as the cord between the free end and the point of immobilization is reverse wound into a coil tighter than the coil on the mandrel. The reverse drive apparatus moves to accommodate the ever increasing length of cord driven by the pinch roller assembly.

Abstract: The present invention relates to a process for manufacturing thermal protection material or piece. According to the process of the invention, a first solution is prepared, comprising a dispersant agent non-solvent of the resin, an emulsifying agent in which said fibers are suspended, and a second solution comprising said liquid resin selected from the thermostable and thermosetting resins having a fixed carbon content greater than 45% by weight, an emulsifying agent identical to that used in the first solution, a solvent of the resin and a dispersant medium identical to that used in the first solution and miscible with said solvent, the first and the second solution are mixed until a homogeneous liquid phase is obtained, the material or the piece is formed, drained, dried and hardened by an appropriate baking.Application of the protection material thus obtained for the equipment of a missile propellant stage.

Abstract: An electrode substrate for a fuel cell having a high porosity, a good mechanical strength and electroconductivity and a sharp distribution of pore radii is prepared by a process comprising mixing 30 to 50% by weight of carbon fiber, 20 to 50% by weight of a binder and 20 to 50% by weight of an organic granule, press-shaping the resultant mixture, curing the shaped product and calcinating the cured product.

Abstract: An apparatus for ion exchange which comprises (1) a very small diameter helix shaped inner tube of a suitable ion exchanging material having a filament therein and having its terminal ends inserted into entry and exit tubes, and (2) a diametrically slightly larger and longer length hollow outer tube having (a) the helix enclosed therein; (b) inlet and outlet apertures; and (c) sealed ends around the entry and exit tubes leading to the helix, and the method of making and using the same.

Abstract: The invention provides an improvement in the method for the enrichment of nitrogen in air by the method of selective adsorption of oxygen in air on a carbonaceous adsorbent material. The improvement comprises the use of an adsorbent material prepared in a specific manner in which a pulverized coal char is blended with a limited amount of a sulfite pulp waste liquor and the blend is shaped into granules or pellets followed by carbonization at 300.degree. to 450.degree. C. for 1 to 2 hours. An enriched nitrogen gas containing 1% by volume or less of oxygen can readily be obtained by passing air through a column filled with the adsorbent material.

Abstract: An improved method of making a carbon composite product wherein a fabric comprised of oxidized or otherwise stabilized polyacrylonitrile fibers is heat treated and then coated with a closely controlled amount of a carbonaceous binder such as a polyimide resin. The fabric is then further heat treated to thermally fuse the resin to the fabric to form a rigid, easily handleable material. The carbonaceous binder is applied to the fabric in a manner whereby substantial encapsulation of the individual fibers is avoided. Next the material is cut into swatches of a predetermined size and shape and the segments are arranged into a basic or starting substrate having a volume greater than the desired volume of the end product. The basic substrate thus formed is then subjected to controlled temperatures and pressures to form a shaped substrate having a known fiber volume, a high degree of open porosity and a shape substantially corresponding to the shape desired of the end product.

Abstract: A method of producing a hand-hewn look in a false wood beam. The beam is formed from a planar laminate composed of a foam core sandwiched between an outer cover and an inner multiply paper backing. The laminate is rolled along its length, with the outer cover on the outside of the roll, to produce creases in the laminate along irregular, longitudinally spaced lines. These creases create irregular surface facets which, with the laminate unrolled, appear as irregular cutting planes in the laminate's outer cover.

Abstract: The invention relates to synthetic carbonaceous granules having high mechanical characteristics and, more particularly, the granules produced from anthracite fines. The invention also relates to a process for the preparation of these granules.These granules are produced by agglomeration of fines to the form of pellets, superficial pre-baking of these pellets by an oxidizing gas at a temperature of between 650.degree. and 1000.degree. C. for a few minutes, followed by calcination at a high temperature and, finally, by crushing permitting the desired granulometry to be obtained.The synthetic carbonaceous granules, according to the invention, are used for all types of application and, in particular, for the manufacture of all types of carbonaceous paste, electrodes and carbonaceous blocks for the linings of furnaces or electrolysis cells.

Abstract: A method and apparatus for manufacturing bent pipes of a composite material composed of resin and filling materials such as reinforcing materials and aggregates by employing a cylindrical molding tool which is deformable between straight-axis form and bent-axis form. Materials are supplied into the molding tool held in horizontally straight condition while the tool is rotated about a horizontal axis, and are molded into a pipe by centrifugal molding. Rotation of the tool is stopped when the pipe molded therein is in uncured state, then the tool is subjected to bending. The resulting bent pipe is removed after it is cured. Before the tool is bent, a bag made of a flexible sheet material is inserted into the pipe and inflated to straighten out the inner periphery of the pipe so as to protect the pipe from any possibility of deformation during bending operation.

Abstract: What is disclosed is a process for preparing R.sub.3 'SiNH-containing metallosilazane polymer containing boron, titanium, or phosphorous by contacting and reacting chlorine-containing disilanes and certain reactive metal halides with [R.sub.3 'Si].sub.2 NH where R' is vinyl, hydrogen, or alkyl radical of 1-3 carbon atoms, or phenyl. Preferred reactive metal halides include BBr.sub.3, TiCl.sub.4, and PCl.sub.3. The metallosilazane polymers are useful as chemical intermediates to provide silicon-containing chemical compounds. The metallosilazane polymers are also useful in the formation of ceramic material. The ceramic materials may be formed by heating the metallosilazane polymer at elevated temperatures in an inert atmosphere or in a vacuum.

Abstract: A method and composition for joining adjacent carbon blocks in a high temperature environment including ramming a mix of calcined anthracite, resin, and a monomeric furfuryl alcohol in between the carbon blocks, curing and carbonizing.

Abstract: Reaction-bonded silicon carbide artefacts are produced by siliconizing a green body formed from a coherent mixture of silicon carbide and carbon powders. The surface of the green body is coated with a paste comprising silicon powder suspended in a carbonizable viscous medium which, on heating of the coating, is converted to an open cellular carbon structure and then, on siliconizing the green body, to a silicon carbide skeleton through which molten silicon is drawn.

Abstract: A generally annular pouring fitment is forced into a closure, thereby deforming a lip of the fitment elastically and inelastically. The closure is then releasably secured to a container causing the fitment to permanently interlock with the container. When the closure is removed, the lip defines a pouring surface of a desired three-dimensional configuration.

Abstract: A plastic pipe part 1 is pushed across a head part 3 of a sealing sleeve 4, being supported by a support 8, thereby providing the plastic pipe part with a widened end 7. Subsequently the widened end is surrounded by an outer mold 11 with three successive widenings 12, 14, 15 and by means of a fluid pressure in the interior of the widened end 7, sealed by the head part 3, the widened end is provided with three socket end widenings 28, 22, 29. After removal of the support 8 the end portion 6 of the socket end is inwardly rebent around the head part 3 thus forming a groove chamber 5 retaining the head part 3 of sealing sleeve 4. Pushing the plastic pipe part across the head part is facilitated by applying a fluid pressure.