Abstract: In a method of manufacturing sheets of highly wear-resistant plastics material, particularly for manufacturing covers subjected to wear, such as, for example, belts, straps, shoe soles or the like, the behavior of the sheets, particularly as far as suppleness, wear-resistance and inexpensiveness in the production are concerned, is to be significantly improved over known sheets of leather or rubber. The blanks manufactured from such sheets are to have the same properties. According to the invention, sheets are manufactured in a high-pressure casting method from a mixture of polyol and a filter portion of up to 30% with the addition of isocyanate, chalk being particularly used as filler.

Abstract: A process for the production of PTFE porous membranes is provided wherein a PTFE preform is prepared by compression molding a PTFE molding powder of 1-90 .mu.m obtained by suspension polymerization of tetrafluoroethylene, the preform is sintered at a temperature above 327.degree. C., followed by skiving the heated preform into a film form. The thus-obtained film is heat treated at a temperature above 327.degree. C., the heat treated film is slowly cooled at a cooling rate of less than 70.degree. C./hr so as to adjust the crystallinity of PTFE in the sintered film to 60-75% and the film is stretched either uniaxially or biaxially to 1.3 to 6.5 times while heating at a temperature of 100.degree.-320.degree. C.

Abstract: A method for obtaining strips from a material, particularly a latex coagulum, is characterized by raising the material with a fluid via a solid piece arranged below the material and placed directly in contact with the material, and cutting the material into strips above the solid piece by the use of cutting means.The invention also concerns apparatus for carrying out this method, as well as the strips obtained by this method or with the apparatus.

Abstract: A method and apparatus are disclosed for quickly and exactly locating a desired structure in a specimen or the like located on a plate or slide, and then preparing an accurate, embedded specimen block for later use, and particularly for preparing thin sections, e.g., 0.1 microns or less, on a microtome machine, for microscopic examination.

Abstract: A method of re-shaping polyimide and modified polyimide foam sheets into selected shapes. Polyimide foam sheets can be made by any of a number of methods, some of which produce sheets of selected thicknesses directly and others of which produce blocks or buns of foam which are sliced into sheets. A sheet is placed in a mold having the desired configuration, such as a half-pipe. The sheet is compressed to about 0 to 99% of the original thickness with heating of one or both major surfaces of the sheet to a temperature of from about 250.degree. to 320.degree. C. for about 0.5 to 5 minutes. Upon removal from the mold, the polyimide foam is found to be self-supporting and to have taken on the mold shape. A moisture impervious densified skin is found on the heated side(s).

Abstract: In a polyvinyl butyral (PVB) sheet plasticized with a multiester of an alcohol having 2 to 4 hydroxyl groups and a C.sub.16 to C.sub.20 unsaturated fatty acid having a hydroxyl group attached to the acid molecule, which sheet does not craze polycarbonate or polyacrylate when in contact therewith, the addition of a synergistically effective amount of a monoester of a glycol and such C.sub.16 to C.sub.20 acid improves the low temperature penetration resistance and adhesion properties of such sheet without significant loss in its resistance to stress cracking polycarbonate or polyacrylate in a laminated glass assembly.

Abstract: A method for obtaining strips from a material, such as a latex coagulum, is characterized by floating the material in a fluid, such as water, and cutting the material into strips from a portion of the material located above the fluid, for example, by means of a band saw.

Abstract: A cadmium telluride boule encapsulated with an encapsulant material consisting of about 80% by volume of powdered beta-phase calcium sulfate hemihydrate, about 20% by volume of powdered alpha-phase calcium sulfate hemihydrate and water. This specially encapsulated boule can then be sawn with a multiblade wafering apparatus used to simultaneously saw the boule into multiple substrate wafers.

Abstract: A method for obtaining strips from a material, particularly a latex coagulum, is characterized by raising the material with a fluid via a solid piece arranged below the material and placed directly in contact with the material, and cutting the material into strips above the solid piece by the use of cutting means.The invention also concerns apparatus for carrying out this method, as well as the strips obtained by this method or with the apparatus.

Abstract: A method is described for adjusting the temperature coefficient of the ferrimagnetic resonant frequency in gallium or aluminium substituted YIG disc resonators. At the compensation temperature, T.sub.o, the temperature coefficient of the resonant frequency, f.sub.r, in a given frequency range is approximately zero. Where this range lies, depends, inter alia, on the substitution value. By annealing the discs, T.sub.o can be moved into the desired temperature range. When the manufactured disc has a compensation temperature above the desired temperature range, annealing must be carried out at approximately 850.degree. to 1400.degree. C. When the manufactured disc has a compensation temperature below the desired temperature range, annealing is performed at approximately 400.degree. to 850.degree. C.

Abstract: A method for obtaining strips from a material, such as a latex coagulum, is characterized by floating the material in a fluid, such as water, and cutting the material into strips from a portion of the material located above the fluid, for example, by means of a band saw.

Abstract: A method and apparatus for obtaining sheets from a flexible material, particularly a latex coagulum, is characterized by the following features:(a) the material is floated in a fluid so that a part of the material emerges above the fluid;(b) a depression is produced on a portion of the emerged part by the use of depressing means;(c) sheets are cut off from the depressed portion by the use of cutting means; and(d) the thickness of the sheets is adjusted by varying the difference in height between the level of the depressing means and the level of the cutting means in the depressed portion.

Abstract: A method of manufacturing tag pin assemblies in which individual tag pins each comprising a head and a crossbar integrally connected by a filament are integrally but severably connected in the thickness direction, which method comprises the steps of continuously molding block tag-pin blanks of a sectional configuration corresponding to the individual tag pins, and of cutting the block tag-pin blank into slices having the prescribed thickness and altogether connected with an uncut portion respectively thereof. Apparatus for practising the method is also disclosed, which comprises an extruder provided with a die for continuously extruding block tag-pin blanks, and a cutter device for cutting the block tag-pin blank into slices having the prescribed thickness and altogether connected with an uncut portion respectively thereof.

Abstract: A flexible sheet material shaped article comprises a thermoplastic material having a plurality of spaced breathing apertures extending through the thickness thereof, each breathing aperture filled with a porous fibrous material. The flexible sheet material shaped article is formed by utilizing a vertical mold, and hanging a plurality of spaced strands of porous fibrous material from the top of the mold. The mold has a plan or cross-sectional shape corresponding to the shape of the article being provided. The mold is then filled with liquid thermoplastic material, and after cooling a slab of thermoplastic material with strands of fibrous material is produced. The slab is then sliced in a dimension perpendicular to the dimension in which the strands extend, and to the desired thickness to provide the flexible sheet material shaped article.

Abstract: An apparatus for forming and producing elongated threads or filaments of synthetic material such as fluorocarbon resins which can be used to form yarns utilizes, a turning machine having, a chuck assembly for mounting a billet of the fluorocarbon resin material therein, and a lead screw assembly with a tool holder assembly thereon. The lead screw assembly is disposed to move a cutting tool in the tool holder assembly longitudinally and parallel to the axes of rotation of the billet so that a plurality of cutting edges on the end cutting face of the cutting tool can cut simultaneously from the billet a corresponding plurality of sized, shaped and dimensioned threads or filaments which can be combined and formed into the desired yarn. Means are provided to synchronize the movement of the cutting tool with the rotation of the fluorocarbon resin billet.

Abstract: A method for the manufacture of target boards for darts or archery, wherein the target boards are made by: compressing fibrous material into a cylindrical bundle with a set of press molds provided with clamp members adapted to clamp the fibrous material so as to remain in cylindrical shape, cutting the cylindrical bundle into circular pieces each being clamped by a pair of clamp members; bonding a reinforcing plate onto one surface of each of the circular pieces; removing the clamp members from the circular pieces; banding the circular pieces with metal strips around the periphery and covering the second surface with a decorative cover sheet.

Abstract: A high yield technique to convert normally-unusable round logs of balsa or other species of wood whose diameter is less than about 4 inches into large rectangular panels that are contourable.The raw logs are first peeled to expose the wood and are then cut into round pieces of a desired length. The pieces, after being kiln-dried, are stacked to form a dry assembly in which the pieces are separated from each other to define a matrix of intersticial spaces. The pieces in the assembly are then interlaminated in a mold by filling the matrix with an elastomeric plastic solution which, when cured, functions as an adhesive to provide an integrated stock block. The stock block is then divided into panels of the desired thickness, each panel being constituted by an array of round wood tiles joined together by elastomeric hinges, whereby the resultant panel is contourable and may be conformed to a curved surface.

Abstract: A method and tool for making tapered, layered plastic toothpicks from a solid plastic slab wherein a rapidly rotating tool having a single cutting edge configured to simultaneously cut and roll a thin film of plastic into a toothpick of the desired shape with each complete revolution is brought into contact with the plastic slab at a predetermined angle.

Abstract: For a cylindrical sodium sulphur cell, a cathode electrode structure is provided with improved electronic conductivity in the radial direction, compared with other directions, by forming a block of fibre material, e.g. graphite fibres, with the fibres aligned in one direction, slicing the block to form a sheet with fibres normal to the plane of the sheet, moulding the sheet and impregnating it with cathodic reactant in a heated mould having a plurality of ribs, to form a plurality of trapezoidal segments with the fibres normal to the planes of the parallel surfaces of the trapezoids, cooling the mould so that the impregnant is solidified and then forming the trapezoids into an annular structure. Preferably the mould is such that thin webs are left joining adjacent trapezoidal sections along parallel edges of the wider of the two parallel faces so that the webs form hinges for folding the segments into the annular assembly.

Abstract: The invention provides a novel gasket for electric shielding composed of an electrically insulating rubbery elastic material as the continuum or matrix and a conductive phase dispersed therein. Different from conventional gaskets for electric shielding in which conductive filaments or particles form the dispersed phase, the inventive gasket for electric shielding comprises flakes of a conductive material as the dispersed phase in the matrix and the flakes are in orientation in such a manner that the flat surfaces of them lie substantially perpendicularly to the contacting surfaces of the gasket. Owing to this unique internal structure, the inventive gasket for electric shielding is very efficient in absorbing the energy of the electric fields or electromagnetic waves.

Abstract: A method for labelling a histological specimen, wherein such specimen is embedded in a paraffin block along with an integral set of supported elongated elements identifying such specimen for subsequent sectioning on a microtome. The identification elements are sectioned concurrently with the specimen, so as to form an integral part of the section.

Abstract: There is disclosed a method of producing dielectric diffraction gratings. This method comprises (a) preparing a preform by forming one upon another layers of two or more glasses having different refractive indices at a given period, and (b) cutting the preform into flat pieces.

Abstract: The instant invention is directed to a novel process for the production of bonded foam, and particularly polyurethane foam scrap. The process allows for the production of a high quality rebonded product. Significant improvements are seen in the quality of the product, reduction in density, reduction in scrap loss, elimination of density variations in the molded product and overall product consistency.

Abstract: The present invention is concerned with a method of and apparatus for cutting a slab from a body of uncured light-weight concrete, resting on a support surface. The method comprises the step of moving the body of uncured light-weight concrete along a longitudinal axis of said support surface through a predetermined distance; cutting a slab from said body while supporting the front face of said slab, moving the slab away from said body along an extension of said longitudinal axis; and subsequently moving the slab along at least one arcuate movement path in a plane perpendicular to said support surface and parallel to said longitudinal axis. The apparatus for performing the methods includes a sequentially moveable work feed means, a wire cutter mechanism for cutting a slab from the face of the concrete and a carosel-like pneumatic suction device for holding and transporting the cut slab to subsequent spraying, shaping and stacking stations.

Abstract: A system for producing decorative plates for photoprinting includes forming variously colored translucent wax layers into a laminar bar from which transverse thin sections are cut and mosaicked edge-to-edge on a transparent support, back-lighted and photographed to produce a positive transparency; both pre-sectioning and post sectioning distortions are employed and a matching "open face" disposition pattern provides symmetry.

Abstract: The present invention is concerned with a method of manufacturing porous concrete products in which there is first formed an at least approximately parallelepipedic body of concrete mass which is plastic at a given stage but still shape permanent, whereafter said body resting on a first support surface, while the concrete mass is still plastic, is divided into a multiplicity of slabs by means of horizontal cuts, the thickness of each slab being much smaller than the original height of the body, whereafter a multiplicity of the thus obtained slabs are charged to an autoclave in which they are steam-cured in a group resting on a further support surface. The invention is characterized in that one slab at a time is lifted from the remaining body resting on the first support surface and is transferred, while being turned through 90.degree., to the further support surface on which surface the transferred slabs are placed on one long-side edge thereof in mutually spaced apart relationship.

Abstract: Method of making slabs of building material which can be used in place of slabs of compact marble are prepared by lining at least one surface of a mold with bonding material, introducing into the mold pieces of solid material to form an aggregate of individual pieces of said solid material with interstices therebetween, filling these interstices with bonding material which chemically bonds to the bonding material utilized for lining, allowing the bonding material to cure and harden to form a solid block of lined material, removing the solid block of lined material from the mold and slicing said block to desired size.

Abstract: Cellular lightweight concrete slabs are manufactured by cutting horizontally through a block of still plastic cellular concrete mass resting on a support. At each cut a single slice is separated from the lowermost portion of the block or the remainder thereof. After each completed cut the upper remainder of the block is elevated by means of a suction head, in order to expose the recently cut surfaces for a treatment, and then again deposited on top of the slice or slices already resting on the support. Rotary roller means are provided for contributing in the surface treatment.

Abstract: Cellular lightweight concrete slabs are manufactured by cutting a still plastic block of cellular concrete mass resting on a first support horizontally into slices which are then moved over one by one to a second support and piled in reversed order thereon, at least one of the two broadsides of each body slice being subjected to a treatment before being covered by the next transferred slice. The treatment prevents the body slices from cementing together during the subsequent steam-hardening process and may also improve the quality of the slabs when hardened. An apparatus for such manufacture features a movable suction head for transferring the body slices as well as associated means for cutting and treating said slices.

Abstract: A method and apparatus for embedding a washer or other perforated plate or body in the body of a cake of soap without leaving a penetration cut in the soap billet which might crack open on, for example, future soap bar moisture changes. The relatively insoluable washer or soap plate has a central hole which is aligned with a hole at least partially through the soap cake in the finished state. The soap cake is fabricated from a soap extrusion having an oversized hole centrally located and longitudinally extending along the extrusion, or the oversized hole can be otherwise provided in a soap extrusion. The extrusion is cut off into soap billets and conveyed to a machine location where a shaft inserts the washer into the central portion of the soap billet through the oversized extruded hole in the billet.

Abstract: A method of producing threads and fibers of synthetic materials uses a cylindrically-shaped body of the synthetic material which is allowed to rotate against a scratching tool and a peeling knife arranged to follow the scratching tool in the direction of rotation. The peeled-off curtain of parallel threads is stretched, possibly while being simultaneously heated, and possibly the threads are cut to form a staple fiber or are ground to a short-staple floccule. A device for carrying out the aforementioned method, has a turning mechanism, a foil-peeling knife secured to a carriage of the turning mechanism, and a scratching tool arranged to precede the peeling knife.

Abstract: A method of forming an imaging member consisting essentially of (a) preparing a photoconductive layer comprising a block copolymer which exhibits a lamellar morphology, said copolymer having lamellae of at least 2 phases, one phase comprising a photoconductive material and the other phase an elastomeric material, with said lamellae being disposed in a direction substantially normal to the horizontal plane of said layer and (b) placing said layer upon a conductive substrate.

Abstract: A method of providing a specimen section embedded in a section of paraffin wax includes providing a mold having a cover and upper and lower portions with a body of solidified paraffin wax therein, heating the paraffin wax while in the mold until it becomes molten, removing the cover of the mold, placing a specimen in the liquid paraffin in the lower mold portion, cooling the paraffin until it becomes a hardened body, and removing the lower mold portion to provide a hardened block of paraffin secured to the upper mold portion with a lower end portion extending below the lower end of the upper mold portion and containing the embedded specimen. The upper mold portion with the paraffin block is disposed within a microtome so that one or more slices of the hardened paraffin block may be cut therefrom to provide a slice of the block which includes a section of the embedded specimen.

Abstract: In order to obviate the necessity for preparing individual panes of stained glass or similar panel-like structures, a mold is filled with chunks of glass or other decorative material with a binder, such as liquid epoxy, filling voids between adjacent pieces. After the precast piece is cured, it is cut into slabs of predetermined thickness and ground and polished to a desired surface finish. The glass, wood, or such other material as may be selected is disposed in the mold in a geometric design, a pictorial inlay, or randomly. By utilizing individual component pieces of a selected design which run the full length of the mold, a plurality of precisely reproduced panels is obtained by the cutting operation.

Abstract: A photoconductive layer comprising a block copolymer which exhibits a lamellar morphology, said copolymer having lamellae of at least 2 phases, one phase comprising a photoconductive material and the other phase an elastomeric material, with said lamellae being disposed in a direction substantially normal to the horizontal plane of said layer. The method of making the block copolymer is also disclosed.