Abstract: Spin welding head is rotated at a predetermined rate by a shaft through a clutch biased into engagement by springs carried by a clutch member which surrounds the shaft. After the rotating head is engaged against the workpiece, the shaft is advanced axially into the head at a predetermined rate through a predetermined distance whereupon shoulders on the head and clutch member interengage to halt the spring induced axial movement of the clutch member with the shaft. Axial movement of the shaft is continued to disengage the clutch and free the head for continued rotation independently of the shaft through its rotational inertia. The mass of the head and its rate of rotation are coordinated to keep the head spinning for long enough to complete the spin welding which was initiated while the head was being driven by the shaft. The shaft also forms a plunger which in each cycle of operation injects lubricant from a reservoir into a passageway system for lubricating the moving parts in the head.

Abstract: An apparatus for repairing windshields and the method for using the apparatus wherein a liquid, curable resin material is forced into cracks in the windshield, using an apparatus mounted directly to the windshield, and which provides a high injection pressure and subsequently a vacuum so that the crack is completely filled, and air bubbles are removed from the filling resin during the time the resin cures. The apparatus in one form includes a disposable, simple-to-make injector that seals positively around the opening of the crack so that the resin is forced into place, and by reversing the injector, a suitable vacuum can be applied to the injected resin for removal of air bubbles.

Abstract: A body for a container or for a road or rail vehicle. The body comprises an inner tube formed of a wound laminate of synthetic resin impregnated material; an outer tube formed of a wound laminate of synthetic resin impregnated material and spaced from the inner tube, an insulation material and reinforcing material in the space between the tubes, the tubes insulation material, and reinforcing material all being securely interconnected. The synthetic resin impregnated material preferably comprises filaments and/or fabric.

Abstract: An improved process and resultant composition for covering golf balls with polyurethane is disclosed. Either the prepolymers or the curing agents are selected to have different rates of reaction so that a partial cure can be made to form a ball half shell whereafter the half shell can be disposed about the golf ball core and finished cured.

Abstract: Hydrophilic coupler solutions are improved by the addition of a diepoxide, pyruvaldehyde, ethyleneglycoldiglycidyl ether or 2,3-butanedione. These solutions exhibit greater stability and a reduced rate of viscosity increase when admixed into gelatin silver halide emulsions.

Abstract: A three dimensional reproduction of an object is made by photographing the object at predetermined intervals by rotating the camera in a fixed plane 180.degree. about a fixed axis which is at right angles to the plane of rotation. Each photograph is divided at a point perpendicular to the photograph and along the axis of rotation. Each photograph is then embedded in or affixed to a wedge shaped carvable material, the angle of the wedges being the same as the angle of rotation between photographs. The wedges are fitted together such that the dissected portions of each photograph meet each other at the common axis in a linear plane, and all wedges, when fitted together, form a 360.degree. circle. The outlines of the photographed article in the composite of wedges represent substantially a three dimensional reproduction of the article. Each wedge, when carved along the outline, represented by the photograph, thus produces a substantially accurate three dimensional reproduction of the image photographed.

Abstract: A dimensionally stable, flexible, hydraulic hose having an elastomeric core tube cross-linked by irradiation with ionizing electrons, a fibrous reinforcing layer surrounding the core tube which prevents the core tube from expanding with increase in pressure and a protective elastomeric sheath about the reinforced core tube.

Abstract: Laying floor tiles is more convenient because the floor tiles are provided with tongues which can be fitted readily into grooves in adjacent tiles because the depth of each groove is less than the magnitude of the portion of a tile which is overhanging a portion of the adjacent tile. Such overhanging and underfitting relationships supplement tongues along adjacent sides into grooves of two adjacent tiles. Peripheral floor tiles can be anchored, but central area tiles can be free from the conventional adhesion to the subflooring. Venting for moisture equilibration between the atmosphere and a sub-flooring such as a concrete slab is achieved because of the absence of adhesive between vertical walls of adjacent tiles.

Abstract: A method and apparatus for forming a thermoplastic resin vessel including a bottom plate and at least two side plates is provided. The bottom plate or portion is applied to the surface of an inner mold by advancing a bottom mold carrying the bottom plate. The side plates or portions are formed along a concave surface of side molds and is then positioned around the inner mold to completely surround the inner mold to form a tube which holds the bottom plate therein. The outer mold is then removed and the vessel formed by the tube and bottom plate is then removed from the inner mold.

Abstract: A process for the repair or reinforcement of fabrics woven of smooth surface synthetic fibers, such as nylon. A swatch of like material having one side coated with a heat sensitive adhesive is used. The area to be repaired or reinforced is buffed with fine grit abrasive to artificially raise a nap on the threads. The area to be repaired may then be preheated. The patch is placed in face-to-face contact with the buffed area and pressure and heat are applied to effect a weatherproof bond between the fabric surfaces.

Abstract: Toner powders for developing electrostatic images are provided with improved control of the polarity and the color of the particles by forming them of thermoplastic resin containing in dissolved state therein a normal salt of an organic basic dye, e.g. a Safranine dye, and an organic acid, e.g. a phenoxy acetic acid, having at least 6 carbon atoms and having a dissociation constant less then 4 as measured in water at 25.degree.C.

Abstract: The invention relates to an improved apparatus for tensioning and fusing together strips of plastics material, having a pair of clamping members mounted on a support base and between which members overlapping strip portions are inserted tensioned, and fused together by frictional heat generated upon movement of one clamping member relataive to the other; the improvement resides in that the clamping members comprise clamping jaws of which at least one is adaptd to be reciprocable at a frequency corresponding to the speed of a drive shaft and that the drive is effected via a gearing which presses said driven reciprocable clamping jaw against the strip abutting it during its movement in the tensioning direction.

Abstract: In the application of a plurality of layers of a settable joint compound over a reinforcing tape, in drywall construction, a thin coat of Al.sub.2 SO.sub.4 is sprayed over the tape and the board edges prior to applying the first layer and over the top of each layer immediately after the layer is applied.

Abstract: A process for manufacturing a heat-insulating roof construction is provided by laying a layer of heat-insulating panels on a roof substructure and overlying sealing sheets of synthetic resin material on the heat-insulating panels. Fillets or narrow strips of foam material are inserted between butt edges of adjoining heat-insulating panels for joining the panels to the substructure and joining the sealing sheets to the panels.

Abstract: A cartridge such as a caulking cartridge is formed of extruded and injection molded resin parts assembled and welded together. A resin tube is extruded and cut off in lengths to form cartridge barrels, and single-piece resin end caps and nozzles are injection molded. The barrel cylinders are fed to an assembly station where the end caps and nozzles are fitted over one of the severed ends of the barrel cylinders in concentric registry with the barrel cylinders and are successively welded to the barrel cylinders to form cartridges.

Abstract: A method of forming hose construction utilizing an aromatic polyester thermoplastic core and reinforcing means mechanically bonded about the core with the core portion in which the reinforcing means is embedded being substantially free of stress. A sheath may be provided about the reinforcing means and may be autogenously bonded to "Hytrel", an aromatic polyester thermoplastic body of material coating the reinforcing means.

Abstract: The present invention relates to a method for manufacturing component thermoplastic sections and for joining them into bobbins for spinning and twisting machines. A frictional surface is formed by injection molding at the outer end surface of a male section and the inner end surface of a female section of a bobbin. By joining the sections and subjecting them to a high-speed rotation relative to each other the frictional surfaces melt and the sections are fused into an integral break resistant bobbin. The specific shapes of the male and female contacting surfaces and the manner of fusing them together are described as being critical.

Abstract: A wallpapering method and dispenser therefor which is adapted to be set on the floor and when so positioned, wallpaper is pulled upwards from the dispenser and pressed against a wall. The dispenser includes an anti-skid resilient base mat, a rotatable mounting gripping the ends of a roll of wallpaper and a paste application roller running in a reservoir for paste. The wallpaper is fed from its mounting over the paste application roller and then past a brush positioned in the dispenser for smoothing the applied paste and removing any excess thereof.

Abstract: Disclosed is a process for manufacturing elastic floor covering boards comprising a lower, water-permeable layer of natural or synthetic rubber particles bound together by an adhesive and a cover layer of non-woven synthetic textile fibers, which process comprises placing into a mold the cover layer of non-woven synthetic textile fibers, impregnating this layer with a resilient, heat-curable adhesive, placing the particles of natural or synthetic rubber which are likewise impregnated with said adhesive on top of the fibrous layer and subsequently compressing both layers in the mold at a temperature below 100.degree.C. and at a pressure of from 40 to 100 metric tons per square meter until the adhesive is cured. Advantageously, a woven reinforcing layer is interposed between the two layers prior to molding to provide an exceptionally strong and stable product.

Abstract: A metal member is coated with or embedded in a high-magnesia glass-ceramic material having the approximate composition of about 60 to 80 weight percent SiO.sub.2, 12 to 20 weight percent Li.sub.2 O, 2 to 14 weight percent MgO, 1.5 to 6 weight percent P.sub.2 O.sub.5, 1 to 7 weight percent of an alkali oxide selected from the group consisting of K.sub.2 O and Na.sub.2 O and their mixtures, 0 to 2 weight percent of a transition metal oxide selected from the group consisting of Co.sub.3 O.sub.4, MnO.sub.2, Fe.sub.2 O.sub.3, V.sub.2 O.sub.5 and WO.sub.3 and their mixtures, 0 to 5 weight percent PbO, 0 to 2 weight percent Al.sub.2 O.sub.3 and 0 to 1 weight percent As.sub.2 O.sub.3.