Abstract: In a method for storing and playback of a repertoire of fixed videotexts, in which the videotext is stored by characters in digital form in an electrical memory, the quantity of the data to be stored can be effectively reduced in that in addition to the characters, position characters are stored and that for recurring, identical character sequences of greater length, instead of the character sequence, a reference to the location of the already stored character sequence is stored. The playback of the thus compressed texts can take place without problems in real time, i.e., without noticeable delay.

Abstract: A vertical cylinder for drying and heating granules which includes an inlet at the top of the cylinder, a conically tapered outlet at the bottom of the cylinder, a rotatable screening ring beneath the inlet, a chute beneath the screening ring and a scraper above the ring inlets for gases in the downward extending section of the cylinder, a shell and tube heat exchanger located coaxially in the bottom quarter of the cylinder, a horizontally movable grid as flow control device below the heat exchange and a discharge zone below the grid.

Abstract: A process for achieving a uniform flow profile of very viscous liquids when flowing through tubes or reaction chambers, wherein the very viscous liquid is passed through annular spaces extending concentrically with increasing diameter over the entire cross-section of the tubes or reaction chambers and having the same depth in the direction of flow, and this procedure is repeated once or several times, the annular spaces being staggered with respect to each other as viewed in the direction of flow, and an apparatus consisting of a combination of two or more discs arranged at axial intervals within a tube transversely to the direction of flow, each disc consisting of a plurality of ring-shaped bands of increasing diameter, the bands being arranged freely of one another and concentrically at intervals on a grid supporting means to provide correspondingly concentric open spaces between the bands over the entire cross-section of the tube, with the walls of the bands running parallel to the direction of flow, and t

Abstract: In a process for drying and heating nylon granules, in which the granules flow downwards through a vertical zone, hot inert gases which are free from molecular oxygen are passed in counter-current through the granules and the cooled granules are then intermittently discharged in part-streams, the improvement wherein the wet granules, or a suspension of the granules in water, are fed into the zone at the top, the granules are deposited as a layer, the water is led away, the layer of granules is then transferred into the next-lower part of the zone, the granules are there allowed to flow under gravity downwards through the zone, and inert gases which are free from molecular oxygen are passed in countercurrent upwards through the granules at from 70 to 200.degree.

Abstract: The continuous countercurrent extraction of polylactam granules with hot water in an extraction zone for the removal of monomer and/or oligomers, the extraction zone being subdivided into subzones by at least one heating zone. The density of the extract-containing water differs by at least 0.0002 between the subzones.