Abstract: A wiper blade for windshields of motor vehicles, has an elongated wiper strip having a constant diameter, which is held by a support frame and loaded toward the windshield to be wiped is movable over the windshield transversely to its longitudinal extension, wherein, viewed in cross section, the wiper strip has a tip held by a support frame and consisting of synthetic caoutchouc and a skirting strip connected with it, on whose side facing away from the tip a movable wiper lip strip resting on the windshield is attached by means of an elongated tilting bar. A wiper blade, which is dependable in operation over time and can be produced in a cost-effective manner results in that at least a portion of the areas forming the outer contour of the skirting strip consists of natural caoutchouc with a low coefficient of friction.

Abstract: A method of producing an elastic elongated wiping blade for a windshield wiper of a motor vehicle, which wiping blade includes a rear strip supported by a support and having a longitudinal passage which is closed from all sides by walls of the rear strip in a longitudinal direction for receiving an elastic reinforcing rail, the method includes the steps of extruding a wiping blade of a material in plastic deformable condition from an extruder nozzle, opening a longitudinal passages in the rear strip during exiting from the extruder nozzle over a longitudinal slot, closing the longitudinal slot by abutting wall portions of the longitudinal passage which form edges of the slot, against one another in soft condition so that the wall portions are connected with one another, and hardening the wiping blade so that the longitudinal passage is closed around in a longitudinal direction.

Abstract: The invention relates to acaricidal compositions containing as active ingredient: the fermentation broth or cell-free fermentation broth, of a concentrate of the fermentation broth or cell-free fermentation broth, or a solidified form of the fermentation broth or cell-free fermentation broth of one or two bacterium strains deposited at the National Collection of Agricultural and Industrial Microorganisms, Budapest, Hungary under the identification Nos. 001083 and 001086 or of their mixed micropopulation, if desired, in a sterilized state, optionally together with the metabolism products arising during the fermentation and inutilized nutriments, as well as one or more solid and/or liquid carrier(s) (preferably sugar or a grist of natural minerals), or an inert solvent (e.g. water) and, if desired, with surface active (preferably anionic or nonionic emulsifying or dispersing) agents.

Abstract: In a flexible hose reinforced by wire plies, at least two wire plies are provided and the wires of each wire ply are disposed in helical convolutions about the longitudinal axis of the hose.The improvement is in that the wire plies satisfy the following formula: ##EQU1## wherein: subscript b indicated the plies arranged with left hand thread,subscript j indicates the wire plies arranged with right hand thread,r.sub.b and r.sub.b are the mean radii of the wire plies,N.sub.b and N.sub.b are the number of wires in each wire ply,F.sub.b and F.sub.b are the tensile strength of the wires,.alpha..sub.b and .alpha..sub.j are the angles of lay of the respective wire plies,l stands for the number of wire plies with left hand thread,m is the number of wire plies with right hand thread.

Abstract: A relatively simple and rapid process for the production of high-grade copper from an inexpensive starting material such as blister copper or copper scraps is described. The starting material is conventionally smelted and oxidized, after which the charge is subjected to a slagging operation to obtain a pre-refined copper bath. After the slagging step, an artificial slag cover is formed on the pre-refined copper bath using a mixture of (1) an oxide of at least one element selected from the group consisting of silicon, phosphorous and boron, and (2) an oxide of at least one element selected from the group consisting of titanium, aluminum, calcium, strontium, barium, magnesium, sodium, potassium and lithium. At least two of such elements are then fed to the bath through the slag cover as alloying components. After such resulting bath is mixed for at least 30 seconds and is left standing for an additional 15 minutes, the slag cover is removed.