| Patent Number |
Title Of Patent |
Date Issued |
| 4356618 |
Production of rolled products |
November 2, 1982 |
| A composite metal sheet or plate is manufactured by completely immersing an assembly of parallel or substantially parallel metal core sheets in molten metal at a lower melting point than the metal of the core sheets, and after the molten metal has solidified reducing the thickness of the |
| 4348242 |
Aluminum powder blasting slurry sensitizer |
September 7, 1982 |
| An improved water dispersible aluminum powder composition containing from 0.1% to less than 5% of a polyvinylpyrrolidone resin, and processes for its preparation are disclosed. This composition has the advantages that, in comparison to known compositions containing higher levels of p |
| 4345743 |
Means and method for containing flowing or standing molten metal |
August 24, 1982 |
| Molten metal, such as aluminum, is held within rigid refractory lining means beneath, above and alongside the metal while heaters keep the outside of the lining means at a predetermined temperature desired for the metal, the heaters being surrounded by thermal insulation and the whole |
| 4344508 |
Lift mechanism for a vehicle tail-board or other load platform |
August 17, 1982 |
| A lifting mechanism for a vehicle tail-board or other platform comprises at least one set of two main levers 12, 13 each of which essentially provides three non-colinear pivots defining a triangle, and the two triangles are substantially identical. Corresponding pairs of pivots 12a and 1 |
| 4341944 |
Reduction of arc blow in multi-electrode welding |
July 27, 1982 |
| A method and apparatus for reducing "arc blow" in multi-electrode welding of a metallic workpiece. Arc blow is produced by interaction between the magnetic fields produced by the closely spaced arcs and electrodes, and takes the form of the end arcs being attracted inwardly towards the |
| 4334935 |
Production of aluminum alloy sheet |
June 15, 1982 |
| Fine-grained, formable Al-Mn alloy sheet is produced from strip-cast slab (e.g. twin-roll-cast slab) by including 1.3-2.3% Mn in the alloy, slab annealing the workpiece by heating it to precipitate most of the Mn in fine intermetallic particles, cold rolling the workpiece to sheet of fin |
| 4325755 |
Formable aluminum alloy sheet product |
April 20, 1982 |
| An aluminum sheet product is formed from an alloy containing Fe 0.6-1.0%, Si 0.5-0.9% and Cu 0.3-0.5% and includes Ti and B in conventional grain refining amount. Mn is permissible in amounts up to 0.2-0.3% but is preferably held below 0.1%. The Mg impurity content is preferably held at |
| 4318755 |
Aluminum alloy can stock and method of making same |
March 9, 1982 |
| Aluminum alloy sheet at an intermediate temper and directly formable by drawing and ironing into a one-piece can body, containing 0.45-0.8% Mn and 1.5-2.2% Mg, with the following properties: ultimate tensile strength, at least about 38 k.p.s.i.; yield strength, at least about 35 k.p.s.i. |
| 4310586 |
Aluminium articles having anodic oxide coatings and methods of coloring them by means of optical |
January 12, 1982 |
| The invention provides aluminium articles having porous anodic oxide films colored by means of an optical interference effect. In FIG. 4, the article 10 carries a first anodic oxide film 12 with pores 14 enlarged at their inner ends 20 and containing deposits 22. The products may be made |
| 4297105 |
Automatic photometric titrator |
October 27, 1981 |
| An alkaline-acid end point detector for titration reactions in which the phenomenon of chemiluminescence is used to detect the end point by monitoring, by means of an electronic light detector, the light output of the reaction materials in a light-tight vessel. The output from the de |
| 4294682 |
Data acquisition systems |
October 13, 1981 |
| A data acquisition system for a hot metal handling operation uses optical transmission of data from a plurality of hot-metal stations to a control computer. Preferably the computer transmits control instructions to operators via the optical link. In an aluminium pot-line arrangement the |
| 4290590 |
Apparatus for sparging molten metal by gas injection |
September 22, 1981 |
| A process for sparging molten metal comprises passing gas bubbles upwardly through a series of spaced nozzles arranged in a trough or furnace, the nozzles being arranged to prevent lateral spread of emergent bubbles so as to hold down the bubble size to a controlled size and thus increas |
| 4288299 |
Enhanced hydrothermal sealing of anodized aluminum |
September 8, 1981 |
| Hydrothermal sealing of anodic oxide coatings is promoted and enhanced by pretreating the anodic oxide coating to be sealed in a mildly basic aqueous medium at temperatures up to those required for hydrothermal sealing of the coating. |
| 4277280 |
Apparatus and method for removal of alkali and alkaline earth metals from molten aluminium |
July 7, 1981 |
| For the removal of alkali metal and alkaline earth metal contaminants molten aluminium (including Mg-free aluminium alloys), is passed through an active bed of particles of material containing aluminium fluoride, maintained continuously immersed in molten aluminium. Alkali metal and |
| 4275043 |
Removal of oxalate from bayer process liquor |
June 23, 1981 |
| Sodium oxalate is supersaturated solution in Bayer spent liquor stabilized by the presence of humic material is precipitated by the treatment with an adsorbent which adsorbs the humic material to give an insoluble product, thus removing it from solution and destabilizing the solution wit |
| 4275042 |
Removal of oxalate from Bayer process liquor |
June 23, 1981 |
| Sodium oxalate in supersaturated solution in Bayer spent liquor stabilized by the presence of humic material is precipitated by the treatment with cationic sequestrants which interact with the humic material to give an insoluble product, thus removing it from solution and destabilizing t |
| 4274894 |
Aluminum powder blasting slurry sensitizer |
June 23, 1981 |
| Aluminum powder compositions, and methods for their preparation, comprising fine particle size aluminum powder, a polyvinylpyrrolidone resin in an amount of 5% to 20%, based on the aluminum, and either a hydrocarbon or a polar liquid medium in an amount of 30% to 50%, based on the alumin |
| 4261736 |
Carbothermic production of aluminium |
April 14, 1981 |
| In a process for the treatment of fume-laden carbon monoxide evolved in carbothermic reduction of alumina the fume-laden gas is contacted with particulate carbon in a fluidized bed maintained at a temperature, preferably in the range 2010.degree.-2050.degree. C. and above that at whi |
| 4251330 |
Electrolytic coloring of anodized aluminium by means of optical interference effects |
February 17, 1981 |
| In a process for the electrocoloring of anodized aluminium in which colors are obtained by interference effects the pores of an anodic oxide film, produced by D.C. anodizing in sulphuric acid, are enlarged by electrolytic treatment in an acid electrolyte having a high dissolving power fo |
| 4245822 |
Process for the production of aluminium |
January 20, 1981 |
| A process for the production of aluminium in two steps:andReaction (ii) takes place in a materials addition chamber and reaction (iii) in a high temperature chamber. Slag is circulated between the chambers via conduits by the action of gas generated in reaction (iii) in the conduits. Alu |
| 4230540 |
Technique for automatic quenching of anode effects in aluminium reduction cells |
October 28, 1980 |
| For the clearance of anode effects in operation of electrolytic cells for aluminium production, movement in the metal pool is induced to effect short-circuiting of the cell and disturbance of any gas film on the face of the anode(s) by raising the anode(s) and then lowering them to datum |
| 4226680 |
Process for electrolytic coloration of anodized aluminium |
October 7, 1980 |
| A continuous length of aluminum is anodized during passage through an anodizing electrolyte and then colored during passage through an inorganic coloring electrolyte, in which a counterelectrode is immersed. In the electrolytic coloring stage alternating current with a superimposed D.C. |
| 4226618 |
Carbothermic production of aluminium |
October 7, 1980 |
| In a process for production of aluminium metal carbon monoxide gas evolved at very high temperature through reaction of aluminium carbide and alumina is cooled by contact with a molten alumina slag at a lower temperature to cause back reaction of contained aluminium suboxide and Al vapor |
| 4224059 |
Carbothermic production of aluminium |
September 23, 1980 |
| In a process for production of aluminium metal described in U.S. Pat. No. 4,099,959 carbon monoxide gas is evolved at very high temperature through reaction of aluminium carbide and alumina in a high temperature zone of the system. This gas is cooled by contact with a molten alumina slag |
| 4224055 |
Process for the production of aluminium |
September 23, 1980 |
| A process for the production of aluminium in two steps:andReaction (ii) takes place in a materials addition chamber and reaction (iii) in a high temperature chamber. Slag is circulated between the chambers via conduits and electrical resistance heating is carried out in the conduits. Hea |
| 4224054 |
Process for the production of aluminium |
September 23, 1980 |
| A process for the production of aluminium in two steps:andReaction (ii) takes place in a materials addition chamber and reaction (iii) in a high temperature chamber. Slag is circulated between the chambers via conduits and is promoted by gas supplied from an external supply. Chamber hea |
| 4222431 |
Continuous casting with resilient strip-edge gripping means |
September 16, 1980 |
| Aluminium and other non-ferrous metals are continuously cast in the form of a thin strip in a thickness range of 5-30 mm through an open-ended casting mould. The emerging strip is cooled in conventional manner by direct application of coolant as it emerges from the mould. The novel featu |
| 4213599 |
Apparatus for the production of aluminium |
July 22, 1980 |
| In a apparatus for the production of aluminium a molten alumina slag, containing combined carbon is circulated through one or more alternately arranged relatively low temperature zones where carbon is added to increase the combined carbon content of the slag by reaction with the alum |
| 4194959 |
Electrolytic reduction cells |
March 25, 1980 |
| An electrolytic reduction cell for the production of aluminium has current collector bars running across the floor of the cell unitarily or in separate sections. Deformation of the molten metal/electrolytic bath interface is reduced by leading current out of the collector bars or bar |
| 4193440 |
Belt-cooling and guiding means for the continuous belt casting of metal strip |
March 18, 1980 |
| In the continuous casting of metal in strip form between moving belts while maintaining a flowing layer of liquid coolant between the reverse surface of a belt and mutually adjacent, guiding-surface, nozzle elements that deliver such coolant, such elements are each constituted as a cooli |
| 4193285 |
Method of deep-drawing of a container or the like from an aluminium material |
March 18, 1980 |
| A method of and apparatus for producing a container or the like by deep-drawing a flat blank of a sheetlike aluminium material. The blank is deep-drawn by means of a first drawing stroke into a cylindrical container blank and brought into its final shape by means of a counter drawing |
| 4190103 |
Continuous casting of metal strip between moving belts |
February 26, 1980 |
| For supporting and cooling the reverse surfaces of belts in apparatus for continuously casting metal strip between such belts, means enclosing the reverse surface of a belt includes a multiplicity of guiding faces that are distributed closely both crosswise and lengthwise of the belt to |
| 4182635 |
Method of heat treatment of ductile metal strip |
January 8, 1980 |
| In a process in which strip metal is subjected to heating while suspended as a catenary in a heating zone, the strip is passed into the heating zone in a condition in which the lower surface is slightly elongated in relation to the upper surface. The differential elongation may be due to |
| 4178796 |
Method and apparatus for particle size analysis |
December 18, 1979 |
| An on-line particle size analyzer which is able to take measurements on material flowing along a line in real time and thus enable automatic process controls to be effected. The apparatus periodically takes a sample of material, dilutes it to a predetermined concentration in a turbid |
| 4176019 |
Process and apparatus for treatment of waste gases |
November 27, 1979 |
| In the scrubbing of gases containing sorbable contaminants, particularly the waste gases from reduction cells for electrolytic production of aluminium the waste gas is injected tangentially into the bottom of a cylindrical chamber, from which it is withdrawn through an axial outlet p |
| 4169770 |
Electroplating aluminum articles |
October 2, 1979 |
| In a process for electroplating aluminum articles, the article is first electrolytically treated, as anode, in a bath consisting essentially of a solution of caustic alkali, and thereafter electroplated. The electrolytic caustic cleaning step, preferably involving agitation, is found spe |
| 4158042 |
Recovery of alumina from siliceous minerals |
June 12, 1979 |
| A process for the production of alumina from siliceous minerals containing substantial quantities of combined aluminium and calcium comprises the steps of treating the finely divided mineral with a hot acid liquor containing chloride, fluoride and calcium ions to extract alumina values |
| 4157137 |
Apparatus for collecting extruded lengths of material into groups |
June 5, 1979 |
| Lengths of material are collected in side-by-side relation in a group and delivered as a group to a receiving station by an apparatus which includes a support table constituted by a number of spaced parallel arms pivoted coaxially with each other about one end. Each arm has a finger whic |
| 4152222 |
Electrolytic coloring of anodized aluminium by means of optical interference effects |
May 1, 1979 |
| Anodized aluminium having an anodic oxide film of at least 3 microns thickness is colored by electrolytically depositing inorganic pigment from metallic salt solutions, particularly nickel, cobalt, tin and copper salts and mixtures. The pigment deposits are characterized by outer ends of |
| 4128480 |
Filtration of liquors |
December 5, 1978 |
| In a large scale filtration apparatus filtration is performed in a vertical cylindrical vessel, in which a number of spaced filter leaves are suspended. The liquor to be filtered is introduced into the shell and the filtrate is led out from the interior of the individual leaves. The filt |
| 4126487 |
Producing improved metal alloy products (Al-Fe alloy and Al-Fe-Si alloy) |
November 21, 1978 |
| A dispersion strengthened aluminum alloy sheet is produced by casting an Al-Fe 1.1 - 2.5% alloy optionally containing Si up to 2.0% and, optionally, proportions of other specified alloying constituents. The alloy is cast in the form of a slab at a growth rate in excess of 25 cm/min. |
| 4126486 |
Producing improved metal alloy products |
November 21, 1978 |
| A dispersion strengthened aluminum alloy is produced by continuously casting an aluminum alloy containing 4 - 15% Si and other optional constituents in the form of a slab at a growth rate in excess of 25 cm/min. to solidify silicon in the form of elongated rods in a size range of 0.0 |
| 4126448 |
Superplastic aluminum alloy products and method of preparation |
November 21, 1978 |
| Aluminum alloy products having superplastic properties are prepared by casting an aluminum alloy containing calcium and zinc in near-eutectic proportions under conditions that develop a eutectic cast structure of fine Ca-Zn-Al intermetallic rods, and working the cast alloy mass to break |
| 4121951 |
Aluminum alloy electrical conductor and method therefor |
October 24, 1978 |
| An aluminum alloy electrical conductor consisting essentially of 0.07 - 0.2% Mg, 0.02 - 0.05% Zr, balance Al with minor amounts of other elements, annealed at 200.degree. - 300.degree. C to precipitate ZrAl.sub.3 and having an electrical conductivity of at least 60% IACS. |
| 4099959 |
Process for the production of aluminium |
July 11, 1978 |
| In a process for the production of aluminium a molten alumina slag, containing combined carbon is circulated through one or more alternately arranged relatively low temperature zones where carbon is added to increase the combined carbon content of the slag by reaction with the alumin |
| 4099434 |
Sawing apparatus |
July 11, 1978 |
| A sawing apparatus for sawing long lengths of material into shorter pieces having a predetermined length and discarding spoiled and short end pieces comprises a saw movable across a saw table formed in two parts which can be tilted independently of each other to tip sawn material into a |
| 4097342 |
Electroplating aluminum stock |
June 27, 1978 |
| A process for the production of electroplated aluminium stock, such as strip or wire, comprises passing the stock continuously through a bath having a high dissolving power for aluminium oxide, such as strong aqueous sulphuric acid and phosphoric acid and subsequently through an elec |
| 4079610 |
Apparatus for stretching extruded lengths of metal |
March 21, 1978 |
| An apparatus for stretching an extruded length of metal comprises a plurality of sets of tailstock jaws mounted at fixed positions in line with and spaced from each other, and a set of headstock jaws mounted in line with the sets of tailstock jaws and movable towards and away from the |
| 4075067 |
Production of aluminium |
February 21, 1978 |
| In the production of alumina for supply to electrolytic reduction cells in the production of aluminum metal, alumina trihydrate is calcined in a calcination furnace to convert it to alumina, typically having a water content of less than 2%. In the course of this operation fine particles |
| 4071072 |
Method of direct chill casting of aluminum alloys |
January 31, 1978 |
| In the production of aluminum ingots by the direct chill casting process, in which the conventional chilled mold is equipped with a thermally insulated "hot top," smooth surfaced ingots are produced under conditions obtained by correlating of the length of the chilled mold, the casting |
