Abstract: An apparatus for the bilateral blowing of a treatment gas onto a web-shaped material comprises a treatment space for the approximately rectilinearly moved web-like or sheet-like material, nozzle ribs arranged on both sides of the web-like or sheet-like material for introducing the treatment gas stream into the treatment space and radial fans for generating the treatment gas stream on the one hand and symmetrical extraction of the treatment gas from the treatment space on the other hand; each radial fan is installed into a 360.degree. spiral housing; the two radial fans are arranged point symmetrical at 180.degree. and each blow into a blow-out duct disposed on the longitudinal side of the apparatus; and each blow-out duct comprises a first region of constant or approximately constant cross-setion and a distributor piece with cross-section diminishing in the flow direction.

Abstract: A high-convection gas jet nozzle section for a sheet-like material guided over rollers, in particular for thermal prestressing or tempering of thin flat glass sheets, comprises a lower nozzle field having nozzle ribs disposed centrally parallel between the rollers and provided with nozzle apertures and an upper nozzle field of which the nozzle ribs provided with nozzle apertures are arranged symmetrically to the vertical axis of each respective lower nozzle rib; the nozzle bottoms of the upper nozzle ribs have the cross-section of a letter "M" extended by a center strip; the width of the nozzle bottom of the upper nozzle ribs is greater than the horizontal distance between the rollers and smaller than the roller pitch; the center strip and the two upwardly tilted inner legs of the upper nozzle bottoms are provided with nozzle apertures; and the smallest distance of the upper nozzle ribs from the upper side of the material is greater than the smallest distance of the lower nozzle ribs from the lower side of th

Abstract: In a floodwater and a process for floodwashing workpieces wherein the workpiece is immersed in a bath of washing liquid and a workpiece surface is acted upon by at least one jet of washing liquid issuing from a nozzle, in order to achieve optimum cleaning efficiency of the jets with as low pumping capacity as possible, it is proposed that a free jet be used as jet and that the nozzle be guided at a distance from the workpiece surface which at most is approximately twice the length of the jet core of the free jet.

Abstract: An apparatus for contactless sealing of an opening against emerging or entering gas employs at least one barrier gas jet which is divided in the vicinity of its longitudinal axis. In the two sub-jets adjoining the dividing plane two different gases flow out, the concentration of the two gases changes abruptly at said dividing and separating plane so that a very reliable sealing is achieved.

Abstract: The invention relates to the process and apparatus coating of a substrate, particularly a glass ribbon, with a pulverulent product. The invention proposes the implementation of a distribution nozzle (10, 24) that sprays the pulverulent product in suspension in a gas, and a suction device (14) for evacuating the resultant waste of the decomposition of the pulverulent product from a coating zone (Z). The invention concerns the formation of at least one to extend the residence time of the pulverulent product in the coating zone to facilitate its deposit on the substrate. The invention also concerns the production of substrates, particularly glazings, coated with metal oxides.

Abstract: An apparatus for uniformly subjecting a flow-traversable heatable material, in particular a stack of plates, rods, tubes, pipes, or the like, to a fluid flow comprises a radial-flow fan which serves as flow drive and which is disposed above the plane of flaps which depending on the desired flow direction can be respectively opened or closed. The radial-flow fan comprises a spiral housing discharging on at least two sides, and the volume flow emerging from the discharge openings of said spiral housing is supplied alternately from the one side or from the other side to the heatable material simply by actuating the flaps.

Abstract: Apparatus is described for subdividing a single stream of powder products entrained in a gas into a plurality of secondary streams. The apparatus comprises an array of identical ducts (33, 47) distributed over the lateral surface of a cone (34, 43) having a circular section, said ducts converging in the vicinity of the apex (35, 44) of the cone to constitute a single intake (36, 41) directed along the axis of the cone and connected to a primary intake pipe (11), said ducts being oriented along the generatrices of the cone and ending at its base in a multiplicity of orifices each connected to a secondary conduit (31) carrying one of the secondary streams.

Abstract: An apparatus for mixing a gas main flow with at least one gas subflow comprises a round inlet region which tapers in the flow direction and over the periphery of which influx openings are distributed for the gas subflow. From these influx openings the gas subflow emerges with a tangential direction component, giving a good mixing with the gas main flow.

Abstract: A device for the uniform application of gas on a plane surface comprises several slot-like openings which are at least approximately in one plane; the longitudinal axes of the nozzle openings are radially arranged, whereas the direction of the flow exiting from the slot-like openings is inclined towards the plane in which the openings are located. This allows an extremely uniform application so that the difference between the maximum and the minimum values of the heat-transfer coefficient is only very small.

Abstract: A mechanism for pneumatically purging undesirable fiber fluff and dust from a spindle assembly of a two-for-one twister textile thread processing machine created during thread processing and particularly in the area of a rotating thread balloon and being characterized by utilizing air flow created by operation of the spindle assembly in processing thread without disturbing the rotating thread balloon is provided. The purging mechanism includes a housing jacket axially mounted on one end of a balloon limitor device and having a generally curved inner wall spaced from the axis of the spindle assembly rotor mechanism and the carrier mechanism a greater distance than the inner wall of the balloon limitor and a lateral opening on one side thereof, and a duct connected to the lateral opening and adapted to lead to a collecting container.

Abstract: A furnace for heating cylindrical charges, in particular billets, rods and tubes, features a transportation facility with a conveyance device which feeds the charges in the longitudinal direction through a treatment chamber, the cross-sectional shape of which is closely similar to that of the charge; the transportation device also features a jacking device which supports the charge such that, regardless of the charge diameter, the longitudinal axis of the charge is always at the same level in the treatment chamber. Situated in the walls of the treatment chamber are nozzle outlets which direct a heated jet of gas radially with respect to the longitudinal axis of the charge and onto the surface of the charge. The feeding of circulating hot gas to the supply channel for the nozzles takes place from both ends of the treatment chamber. A ventilator is situated above the mid point along the length of the treatment chamber and blows out both inlets to the feed channels.

Abstract: Straight advance bars in the shaping region are moved plumb downward between the upper advance position and the lower shaping position for the purpose of curving glass sheets heated to the softening point; a pressing means is deposited in time-relation to this motion on the top side of the glass sheet and together with the advance bars is displaced downwardly; when in the shaping position, the glass sheet rests on stationary forming bars curving plumb downwardly and of which the shape is fitted to the desired curvature of the glass sheet. The shaping region is followed by a tempering zone wherein the curved glass sheets are cooled by gas-blowing without their surfaces being affected thereby.

Abstract: A method and apparatus are described for coating a substrate such as glass with a powder such as a compound that an be decomposed by heat. The method comprises the steps of forming a sheet of powder suspended in a gas and moving toward the substrate to be coated, homogenizing the mixture of powder and gas by creating turbulences in it, surrounding the sheet with flowing gas having the same velocity as the sheet itself, and accelerating the sheet in the direction of the substrate. This method and the apparatus which implements it are particularly useful in the manufacture of glass coated with a film such as metal oxide.

Abstract: A shielding device to reduce wind velocity, in particular for the deposition of drifting sand or snow, has several plane elements which may be erected next to each other at an approximate right angle to the oncoming direction of the wind. The height of the individual plane elements amounts to at least twice the width of their base, whereas their width decreases as the height increases.

Abstract: An apparatus for guiding a length of web material in a floating manner which comprises a nozzle frame means with slit nozzles extending laterally transversely to the direction of motion of the length of material and having annular nozzles disposed between the slit nozzles for directing a blown medium against the web material. A guide vane grille is arranged along the axis of the nozzle frame means for the supplied blowing medium and a diffuser joins the guide-vane grill to create an exhaust impedence to delay the blowing medium.

Abstract: An artificial heart valve consists basically of a valve ring and a valve flap in the form of a disc which is pivotally mounted eccentrically in the valve ring, the external circumferential surface of the valve flap cooperating with the internal contour of the valve ring to form a sealing line extending round the circumference of the valve flap. Manufacture of the heart valve can be substantially simplified if the valve ring is obtained by a slightly oblique cut through a hollow cylinder and the valve flap by an oblique cut made at a slightly larger angle through a solid circular cylinder which constitutes the core of the hollow cylinder.

Abstract: A method and apparatus is provided to convey materials in strip form by air pressure floatation. Plenums are provided along the path of floatation to alternately create positive and negative air pressure support areas which induce a wave-like conveying motion to the strip.

Abstract: A rate-of-flow meter, particularly for diagnostic spirometry, comprises a flow tube containing, on diametrically opposite sides, a measuring stud provided with pressure taps and a displacement body facing the stud.

Abstract: An installation for reducing suction forces on a flat or slightly inclined roof structure including disturbing or interfering elements or baffles arranged in the zone of the roof corners. The disturbing or interfering elements or baffles may be provided with either vertically or horizontally extending bars or may include a plurality of perforations or holes disposed in a plate member. Furthermore, the disturbing element or baffle may have a bracket-like configuration or consist of a wind guiding device of a snowplow shape.