Abstract: The wire feeder apparatus according to the invention has a carrying body (12), tubular guide elements fixed in the openings on the two opposite sides of the body determining a straight-line path for welding wire, further, two spatially separated feed rolls (33, 34) with parallel axles and provided with grooves on their curved surface fitting to the path of wire. The feed rolls (33, 34) are pivotally fixed on the mounting plate of the carrying body and they are individually connected to a gear-wheel via interlocking connection. A pressure arm (14) is fixed to the carrying body (12) by a turning joint, which pressure arm carries two pinch rollers (43, 44) having parallel axles with the feed rolls.

Abstract: The wire feeder apparatus according to the invention has a carrying body (12), tubular guide elements fixed in the openings on the two opposite sides of the body determining a straight-line path for welding wire, further, two spatially separated feed rolls (33, 34) with parallel axles and provided with grooves on their curved surface fitting to the path of wire. The feed rolls (33, 34) are pivotally fixed on the mounting plate of the carrying body and they are individually connected to a gear-wheel via interlocking connection. A pressure arm (14) is fixed to the carrying body (12) by a turning joint, which pressure arm carries two pinch rollers (43, 44) having parallel axles with the feed rolls.

Abstract: A sulfur dye or sulfurized vat dye is treated in an aqueous reducing medium, preferably an aqueous mixture of alkali and reducing sugar, to form a solution which is then oxidized to form particles of the dye having improved characteristics.

Abstract: Cellulosic substrates are dyed by a continuous dyeing method with dispersed sulfur dyes using a reducing sugar, especially glucose, as the reducing agent for the dye.

Abstract: Improved sulfur dye dispersions are obtained by subjecting an aqueous suspension of oxidized sulfur dye particles to membrane separation. The oxidized sulfur dye is obtained by controlled aeration whereby the content of sulfides, polysulfur and inorganic salts is significantly decreased.

Abstract: Liquid compositions of sulfur dyes in reduced form are obtained by reducing a sulfur dye in an alkaline medium to which no sulfide reducing agent has been added, preferably employing a reducing sugar as reducing agent and a sulfur dye which has been washed to remove inorganic salts therefrom.

Abstract: Polyester-cotton blend textile substrates are dyed with a disperse dye and then with a sulfur dye from the same dyebath which is maintained at a temperature no higher than 105.degree. C. when the sulfur dye is present therein and which preferably contains glucose as the reducing agent for the sulfur dye.

Abstract: Polyethylene textile fibers dyed with the dyestuff resulting from coupling equimolar amounts of diazotized ##STR1## and the coupling components obtained by reacting 3-amino-4-methoxyacetanilide or 3-amino-4-ethoxyacetanilide with diethyl sulfate, wherein X is Cl or Br are disclosed. Said fibers are a desirable greenish blue shade, with good fastness properties, and a very green flare under incandescent light.