A process for producing laminate sheets or films based on phenolic resin/melamine resin and provided with a surface protection is described. A variant of the process is distinguished in that a transfer coating is applied to a backing material, the transfer coating allowed to cure at least partly, the film comprising the backing material and the transfer coating pressed together with the individual...

An electromagnet or solenoid includes an armature in the form of a piston guided for sliding axially in a magnet housing surrounding it. The armature has at least one bearing ring providing the slide bearing of the piston. The bearing ring is held by engagement in at least one groove in the outer surface of the piston. The groove extends axially on the piston and is open to one piston end surface ...

In a solenoid valve, the magnet armature space is connected via a passage and a calming chamber and a restriction to the valve-housing space from which the low-pressure-side outlet holes lead away. By means of this pressure feedback into the magnet armature space, dirt particles are retained in the chamber and the chopper frequency impressed on the valve can be reduced in order to improve the hyst...

A process and apparatus is provided for the production of nitrogen with over-atmospheric pressure by two-stage rectification of air at low temperatures. Air (1) is compressed (2), pre-purified (4, 6), cooled (33) in heat exchange with products of fractionation, and fed to the rectification device. An oxygen-enriched liquid (19) from the sump of the low-pressure stage (13) is vaporized (15) in cont...

The field of use of the invention refers to the mixing of liquids with liquids. The object of use is, in particular, the production of battery acid. The purpose of the invention is to provide a process and an apparatus which make it possible to produce a large amount of battery acid within a relatively short time. The technical object of the invention is to develop a process and an apparatus for t...

Appts. for splicing yarns mechanically, operates to untwist yarn tails while the are mutually positioned spaced apart, and then bring the tails together for retwisting when trimmed to length. The appts. comprises opposed rings which are brought together and rotated in opposite directions to untwist the yarns and trim the tails to length. The yarns are then brought together and retwisted, at least ...

An acoustic method and apparatus for investigating an earth formation penetrated by a borehole are described. Acoustic transducers are mounted on a tool to accurately determine the distance between a segment of the tool and the wall of the borehole. The acoustic transducers are positioned in such manner that the stand-off distance between individual resistivity measuring electrodes in an array, wh...

A generally cylindrical wall member (14) of resilient material has an opening (22) extending axially of the container (10) for inserting beads (12) into individual compartments (54) in the container (10). Axially extending sides (30) of the wall member (14) are resiliently movable radially outwardly to grip and hold the beads (12) during transporting. The curvature of the sides (30) is such that a...

The density of successive increments of a cigarette rod is measured by an apparatus which employs one or more photocells operating with ultraviolet, infrared or visible light. The radiation source of each photocell emits a beam of ultraviolet, infrared or visible light which penetrates through the wrapper and the filler of the rod and thereupon impinges upon one or more transducers which transmit ...

The method of treating open-celled polyurethane foam by the application of a modifying ingredient, such as a dye, pigment, color stabilizer or fire retardant, for example, wherein the method comprises the steps of (a) applying an excess of a liquid solution or dispersion of the modifying ingredient to a mass of the foam, (b) removing most of the excess of the liquid by squeezing the mass, (c) pass...

A contractible tire building drum having segmental cylindrical shoulder rings with flanges at the ends and a stretchable bladder positioned over and between the shoulder rings. Each of the shoulder rings has a primary set of segments and a secondary set of segments alternately spaced around the ring. The primary and secondary sets of segments are retractable from positions in the cylindrical shoul...

A monoaxially or biaxially stretched film structure, or a heat-set structure thereof, of an unstretched film of an aromatic polyester of the poly-1,3-phenylene terephthalate type, said aromatic polyester having an intrinsic viscosity, determined in p-chlorophenol at 50 DEG C., of 0.4 to 2.0 and being composed of [A] polybasic carboxylic acid component units consisting of terephthalic acid units (a...

The invention relates to polyetherurethane particles having absorptive activity whereby these particles may be applied for the extractions or the separations of metal ions from liquids, e.g. from waste liquors leaving galvanizing, printing and metal working industries. The particles are of a spherical shape, have a bulk density of at least 0.5 g/cm3 and are resistant against acidic liquids. The in...

A gas laser apparatus for medical treatment, especially a neon-helium laser apparatus, using which specific body parts can be treated by means of a laser beam which is interrupted in time, is intended to be constructed such that a broad treatment spectrum can be achieved and such that, in particular, high-frequency interruptions of the laser beam are possible although a relatively slow-reaction ga...

A suspension umbrella has a crown connected to a holder by means of a ball joint. For arresting the ball joint in different positions the ball joint is equipped with an arresting body which is actuatable by means of a screw spindle arranged coaxially to the umbrella axis. A securing device includes a securing screw which is threaded into the crown through a bore in a sleeve in order to prevent rel...

Apparatus and method for inspecting the finish of transparent containers, particularly glass containers, which include facility for directing diffused light energy laterally through the container finish as the container is rotated about its central axis. A camera includes a plurality of light sensitive elements disposed in a linear array angulated with respect to the container axis to view the ext...