Abstract:
A process for producing an opaque coating on a substrate comprising: applying to said substrate a coating composition comprising an organic liquid comprising at least 85% by volume paraffinic hydrocarbons, a cellulose acetate propionate or cellulose acetate butyrate having an hydroxyl content of at least about 4%, a cross-linking agent compatible with the resin, a solvent for the resin and the cross-linking agent, and an acid catalyst for promoting cross linking of the resin with the crosslinking agent; and heating the composition to both cure the composition and to form voids which scatter light sufficiently to form an opaque coating.
Abstract:
A method and apparatus for extruding metallic tubes or pipe of varying wall thickness so as to maintain proper tube dimensions at the time of changing from one wall thickness to another during the extrusion operation. The apparatus includes an extrusion press having a ram with a mandrel slidably mounted therein and a stationary die. The mandrel has a stepped tip which is adapted to enter an opening in the die, and the maximum diameter of the mandrel is the same as the diameter of the die opening. The ram is advanced to extrude the flowable charge while one stepped portion of the mandrel tip is disposed within the die opening, but the ram is stopped while the mandrel is moved to present a different stepped portion of its tip to the die opening. At such time, the mandrel alone is moved to extrude the flowable material, and the mandrel is moved at a speed which is the same as the speed of the material, whereby at the time of the changeover the extrusion ratio of material flow to the speed of the mandrel is maintained at unity.
Abstract:
Separation of caustic slurry of bauxite into two fractions, a high solids fraction of which rejoins the other after the other has been conducted through one or more tubular heaters, a new or reconstituted stream containing both fractions thereafter entering one or more pressure digesters.
Abstract:
An electrical conductor assembly particularly adapted for underground transmission of high voltage direct current is provided which includes a hollow, cylindrical metal sheath made of elongate staves having tongue and groove engagement between the longitudinal edges of adjacent staves and welded together exteriorly of such tongue and groove engagements and having a groove in the bottom of the sheath in the interior surface thereof to collect particles of foreign matter in the sheath. The conductor further includes a solid cylindrical conductor core of metal such as an aluminum conductor alloy concentrically supported in the sheath by a plurality of insulators at spaced intervals along the length of the conductor and has a compressed gas in the sheath for insulating the aluminum core from the sheath.
Abstract:
A method of fabricating a laminated metal container wall provided with an opening device including providing a metal sheet having a layer of protective material secured thereto by means of an adhesive selected from the group consisting of epoxy, polyester and polyurethane. The protective material is selected from a group consisting of a copolymer of a polyolefin and ethylene and ionomers of polyolefin. A preferred form of copolymer has polypropylene as the polyolefin employed with the ethylene. A preferred polypropylene ethylene copolymer may have an ethylene content of about 2 to 10%. The laminated metal sheet is scored to define a removable sector therein. The scoring is preferably effected to such a depth as to provide residual metal along the score line of about 2 to 6 mils. Simultaneously with the scoring operation, reducing the thickness of the layer of protective material without penetrating entirely through the layer. The protective layer may have an initial thickness of about 1.5 to 4 mils and preferably about 2.5 to 3.5 mils. A laminated metal container wall having a score line defined removable sector. An adhesive material secured to one surface of the container wall. A continuous layer of protective material secured to the metal panel portion by means of the adhesive. The protective layer may have a thickness of about 1.5 to 4 mils and is selected from a group consisting of a copolymer of a polyolefin and ethylene and ionomers of polyolefins.
Abstract:
Decorative plate or sheet having an attractive textured surface is continuously cast in an open ended chilled mold. The freezing plate ingot has a surface solidified in a varying and cyclic fashion by applying thereto a volatile lubricant at a rate much higher than that normally employed in similar casting arrangements. The resulting plate exhibits a textured surface with accompanying variations in composition and metallurgical structure such that the response to electrolytic anodizing treatments varies and the anodized surface exhibits varying shades and colors.
Abstract:
In the operation of a cell for the electrolytic reduction of Al2O3 dissolved in a cryolite bath of aluminum metal utilizing a carbon anode, the improvement wherein there is provided at the anode an atmosphere containing water in amounts effective for preventing anode dusting.
Abstract translation:在利用碳阳极溶解在铝金属的冰晶石槽中的Al 2 O 3的电解还原电池的操作中,其中在阳极处设置有用于防止阳极撒粉的量的含有水的气氛。
Abstract:
A method of making a hollow metal ball bat having a wall thickness along the length thereof that is substantially uniform thereby providing a weight ratio for the handle and barrel portions of the bat that approximates the diameters of the handle and barrel portions. The handle portion of the bat is formed by a swaging process which reduces the diameter of a portion of a metal tube blank, having generally a uniform diameter and wall thickness, on a mandrel having a substantially uniform diameter. The mandrel is effective to maintain the uniform wall thickness of the blank by forcing the metal thereof to flow longitudinally from the end of the blank forming the handle portion of the bat.
Abstract:
The method of making a heat treated aluminum alloy forging exhibiting reduced ''''oil-canning'''' in ''''oil-canning''''-susceptible sections upon machining, including bonding insulation onto an ''''oil-canning''''-susceptible section of an age-hardenable aluminum alloy forging with a bonding agent effective for maintaining a bond during heating for solution heat treatment, solution heat treating the thus-insulated forging, and, with the insulation still on the section, subjecting the solution heat treated forging to a quench for maintaining precipitable components of the alloy in solution in the ''''oil-canning''''-susceptible section, whereby upon machining, said section will exhibit reduced ''''oilcanning.
Abstract:
1. A METHOD OF RECOVERING ALUMINUM VALUES FROM ALUMINUM MATERIAL FED TO A POOL OF MOLTEN SALT, THE MEMETHOD COMPRISING THE STEPS OF (1) FEEDING ALUMINUM MATERIALS INTO SAID POOL, (2) CONTACTING THE ALUMINUM MATERIALS WITH SAID MOLTEN SALT, THE SALT BEING EFFECTIVE TO SEPARATE NON-METALLIC SOLIDS FROM THE ALUMINUM MATERIAL, AND THEREBY RELEASE MOLTEN ALUMINUM, (3) REMOVING MOLTEN ALUMINUM FROM SAID POOL OF SALT THEREBY SUBSTANTIALLY DEPLETING THE SAME OF ALUMINUM VALUES WHILE LEAVING ITENRICHED WITH A SUSPENSION OF NON-METALLIC SOLIDS, (4) CIRCULATING THE SALT ENRICHED WITH NON-METALLIC SOLIDS TO MAINTAIN SUSPENSION OF THE SAME IN SAID SALT AND TO DIRECT THE SUSPENSION AND SALT TO A DEVICE CAPABLE OF COLLECTING AND THEREBY REMOVING SOLIDS FROM SAID SALT TO SUBSTANTIALLY DEPLETE THE SALT OF SAID SOLIDS WHILE THE SALT DEPLETED OF SAID SOLIDS IS RETURNED DIRECTLY TO THE CIRCULATING SALT FROM THE DEVICE, AND
(5) CORRELATING THE FEEDING OF SAID ALUMINUM MATERIALS WITH THE REMOVAL OF SAID NON-METALLIC SOLIDS TO MAINTAIN IN SAID POOL A SOLIDS CONTENT NOR EXCEEDING 25 PERCENT BY WEIGHT OF THE SALT THEREIN.