Abstract: To provide an assembly, comprising an exhaust gas turbocharger and an intercooler for an internal combustion engine and a hot-side charge-air line connecting the exhaust gas turbocharger to a charge-air inlet of the intercooler, which assembly allows the movements to be equalised between the exhaust gas turbocharger and the intercooler and is simple to produce and assemble, it is proposed that the hot-side charge-air line comprises a one-piece plastics material tube which is formed from a material containing polytetrafluoroethylene and/or modified polytetrafluoroethylene and has at least one flexible zone.

Abstract: The invention relates to a device and a method for finishing and calibrating preforms (10) which are removed from a multiple injection tool in an unstable shape, and proposes an air cooler integrated into the water cooled cooling sleeves (21) for the outer side of the open end face of the preform (10). Particularly in the case of special preform varieties, the areas which are unsupported in the cooling sleeves (21) can be pre-strengthened on the outside, from the beginning of the transfer from the open molds (8, 9) to the removing and cooling sleeves, respectively, by means of a cooling which uses cooling air or low-temperature air. With the novel solution, the highest quality can be assured, in particular with respect to dimensional stability and the absence of pressure points under load, by means of a calibration in the cooling sleeves (32) and the treatment in the area of the aftercooling.

Abstract: An auxiliary device and a method for finishing and calibrating preforms that are removed from a multiple tool in an unstable shape, the calibration process being performed with compressed air immediately after removing and withdrawing the preforms from the multiple tool. Nipples that can be inserted into the preforms are provided with expandable press rings or sealing rings in order to seal the interior of the blow-molded part of the preforms. The compressed air is introduced via the nipples, the sealing process being performed by radially expanding the press rings or sealing rings in analogy to the closing process of thermoses, thus protecting the preforms from adverse forces. The sealing point can be randomly selected in the transition zone from the threaded part to the blow-molded part of the preforms. The interior of the blow-molded part is optimally sealed without affecting the form stability and dimensional stability of the preforms.

Abstract: To provide an assembly, comprising an exhaust gas turbocharger and an intercooler for an internal combustion engine and a hot-side charge-air line connecting the exhaust gas turbocharger to a charge-air inlet of the intercooler, which assembly allows the movements to be equalised between the exhaust gas turbocharger and the intercooler and is simple to produce and assemble, it is proposed that the hot-side charge-air line comprises a one-piece plastics material tube which is formed from a material containing polytetrafluoroethylene and/or modified polytetrafluoroethylene and has at least one flexible zone.

Abstract: In order to provide a tubular moulding with a wall, which has high compressive strength and high mechanical stability with good temperature resistance and good chemical resistance, it is proposed that the wall comprises a composite, which comprises a plastics material layer, which is formed from a material containing a fluoropolymer material, and a reinforcement layer.

Abstract: The present invention refers to a sealing element, preferably for sealing quick couplers of fuel lines, particularly in automotive vehicles, comprising a supporting section which is made at least in part from an elastic material, and a sealing section which is made from a material differing from the elastic material, the sealing element being provided on its circumference with at least one contact surface and at least one sealing surface. Such a sealing element can thereby be produced in an installation-friendly and inexpensive way in that according to the invention at least one contact surface is formed by the supporting section and at least one sealing surface by the sealing section.

Abstract: An injection molding apparatus for processing thermoplastic materials has at least one plasticizer unit, at least one injection molding cylinder with associated emptying piston, and at least one injection molding mold. The injection molding cylinder is provided with a sleeve which is arranged reciprocally between a position in which communication with the injection molding mold is interrupted and a position in which communication with the injection molding mold exists. In the position in which the communication with the injection molding mold is interrupted, a passage is provided between the sleeve and the housing which is connected between the feed conduit from the plasticizer unit and a storage space defined on the inside by the sleeve. The outside diameter of the ejection piston is slightly smaller than the inside diameter of the sleeve so that remaining between the two is an annular gap through which the plastic material passes into the storage space from one end of the sleeve.

Abstract: A process for the preparation of enol ethers of the general formula I ##STR1## in which R.sup.1,R.sup.2,R.sup.3,R.sup.4,R.sup.5 denote C.sub.1 -C.sub.20 alkyl, C.sub.1 -C.sub.20 alkenyl, or C.sub.7 -C.sub.20 phenylalkyl,R.sup.2,R.sup.3,R.sup.4 denote hydrogen, aryl, cyano, --COOR.sup.5, C.sub.1 -C.sub.12 alkyl monosubstituted to trisubstituted or interrupted by --COOR.sup.5, --C.dbd.O, cyano, or C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkyl monosubstituted to trisubstituted by --COOR.sup.5, --C.dbd.O, cyano, or C.sub.1 -C.sub.12 alkyl, or C.sub.7 -C.sub.20 phenylalkyl andR.sup.2 and R.sup.4 or R.sup.3 and R.sup.4 together form a C.sub.3 -C.sub.10 alkylene chain or a C.sub.2 -C.sub.20 alkylidene chain, from acetals or ketals.

Abstract: An apparatus for producing a preform for the manufacture of a hollow body from thermoplastic material by extrusion blow molding has an extrusion head with a material-storage chamber which can be emptied by a piston to produce the preform. At its peripheral surface the piston has a groove-like recess providing a receiving passage which extends parallel to the direction of movement of the piston, for receiving plasticized material from the extruder connected to the extrusion head. Communicating with each of the two end regions of the receiving passage are respective duct systems through which respective flow portions of material from the extruder flow to the storage chamber.

Abstract: A process is disclosed for the transmission of data between subscribers of a public dial telephone system in which at least a telephone, a data modem having a tone transmitter and a tone receiver, and a data device are connected to the dial telephone system. The data modem is equipped with a circuit for ringing voltage detection with bridging of ringing pauses. For transmission of a data answering tone and, if applicable, for selection of a channel position, in the case of manual operation, after operation of a data key, a distinction between the `called` state and `calling` state is made according to whether, at the start of loop current, a ringing voltage was detected by the data modem or not.