Abstract: A method for producing a feedstock wire is produced from a first metal strip and at least one further metal strip by roll forming, wherein in particular the first metal strip and the at least one further metal strip are made of differing metals, preferably of differing meals having differing yield points, wherein a jacket, which in the final shape completely surrounds the at least one further metal strip in the circumferential direction, is formed from the first metal strip in a plurality of passes by roll forming using a plurality of roll stands, and wherein, first, exclusively only the first metal strip is formed to a preliminary shape in a plurality of passes using a first group of roll stands and, thereafter, the first metal strip and the at least one further metal strip are jointly formed to the final shape in a second group of roll stands.

Abstract: A nickel strip is made from a starting material of solid cathode sheets having a minimum nickel content of 99.94% by weight and a maximum trace element content, in ppm by weight, of <35 carbon, <5 sulphur, <14 manganese, <11 magnesium, <11 aluminum, <25 titanium, and <15 silicon. The sheets are hot-rolled individually in a single layer/ply. The sheets are then joined to form the strip.

Abstract: The invention relates to a method for producing a nickel strip from a plurality of at least substantially complete cathode plates, in which the plates are hot-rolled individually in a single layer/in a single ply before or after being joined to form a strip, wherein before the hot rolling the starting material of the plates has a minimum nickel content which can be determined in particular by optical emission spectral analysis, and a maximum content of trace elements, as follows (see Table A).

Abstract: The invention relates to a method for joining cathode metal sheets to form crude strips that can be coiled and rolled and for the production of metal strips of a constant thickness from crude strips that have been produced from cathode metal sheets of varying thicknesses. The aim of the invention is to produce metal strips of a high purity that are devoid of non-metallic inclusions. The method can be used whenever highly pure and/or inclusion-free metal in strip or foil form is required in large quantities. The application of said method is only limited by the fact that the metal is deposited electrolytically on cathodes, and if permanent cathodes are used, must be separated from said cathodes without fragmentation. This is possible with the following metals: lead, zinc, tin, copper, nickel, cobalt, cadmium, iron and gold.

Abstract: The invention relates to a method for joining cathode metal sheets to form crude strips that can be coiled and rolled and for the production of metal strips of a constant thickness from crude strips that have been produced from cathode metal sheets of varying thicknesses. The aim of the invention is to produce metal strips of a high purity that are devoid of non-metallic inclusions. Strips produced in prior art are either limited in their dimensions, or a high-purity and the elimination of inclusions can only be achieved with high scrap rates and high production costs. The former case applies to the production of a strip from a single cathode metal sheet and the latter case to strips produced by fusion metallurgy. The method aims to reduce the number of method steps required for the production of strips and thus the production costs. The method takes advantage of the fact that many metals can be deposited in a highly pure form without inclusions in the form of cathode metal sheets by aqueous electrolysis.