Abstract: A false-twist spinning unit or apparatus comprises a first spinning disc, such as a top spinning disc and a second spinning disc, such as a bottom spinning disc rotating in opposite directions and arranged in staggered or offset relation at an inter-axis distance from one another such that friction rings thereof form a substantially rhomboid-like crossing surface. Disposed outside the friction rings are suction surfaces which engage the fibers of a sliver delivered from a nip line of an exit roll pair of a sliver feeder and convey such fibers to a yarn core line. The suction surfaces have suction apertures and sucked-off air is transported by suction nozzles coacting with the suction apertures. In operation, at the region of the nip line there is produced a false-twisted yarn core forming a spinning triangle.

Abstract: In a multi-ply headbox, the nozzle chamber is subdivided by rigid partition walls into a number of nozzle chambers, and the slice openings or outlet slices are adjustable independently of one another. This is accomplished by providing a pivotable mounting of the partition wall or walls in a guide block, for instance, such pivotable mounting being accomplished by a substantially cylindrical shell or cup bearing structure. The desired pivotable movement or adjustment of the rigid partition wall can be undertaken by an inclined groove-cam guide arrangement effective at a projection of the partition wall or by pressure cushions, such as pressure hoses effective at both sides of the projection.

Abstract: The hot and cold water mixing device contains a rotary slide which controls in opposite sense the inflow of cold and hot water. The rotary slide is provided with a device for suppressing the flow of hot and cold water through the rotary slide. In order to render the mixing valve smooth in operation and to simplify its construction, without eliminating the advantages of such construction of mixing device, the flow suppressing device is formed by a closure portion or element of a servo valve, and the rotary slide is structured to serve as a seat for such closure portion or element.

Abstract: To control the yarn quality of a yarn produced by a textile machine, particularly a false-twist jet spinning apparatus, there is provided at the end of the spinning operation, however, upstream of the pair of withdrawal rolls for the outfeed of the produced yarn, a yarn tension measuring device. Upon falling outside of a predeterminate yarn tension tolerance or tension range the yarn tension measuring device controls operation of the false-twist jet spinning apparatus such that, as required, there is accomplished an appropriate increase or decrease of the yarn tension of the yarn produced by the false-twist jet spinning apparatus. Alteration of the yarn tension can be achieved, for instance, by varying the blowing intensity or energy of the air utilized for the spinning operation as well as by varying the angle at which there is blown in the air used for the spinning operation or by varying the rotational speed of the delivery rolls which deliver the formed yarn or by selected combinations of these measures.

Abstract: To control the yarn quality of a yarn produced by a textile machine, for instance a friction spinning apparatus, there is provided at the end of the friction spinning operation, however, forwardly of the pair of withdrawal rolls for the outfeed of the produced yarn, a yarn tension measuring device. Upon deviating from or falling outside of a predeterminate yarn tension tolerance value or range the yarn tension measuring device controls operation of the friction spinning apparatus such that, as required, there is accomplished an appropriate increase or decrease of the yarn tension of the yarn produced by the friction spinning apparatus. Alteration of the yarn tension can be acheived, for instance, by acting upon the drive for one of the friction spinning elements, to control the rotational speed thereof, or by selectively positioning the suction nozzle of a friction spinning element, or by controlling the size of the nip between coacting friction spinning elements, or selected combinations of such measures.

Abstract: The refiner for processing a fiber stock suspension for paper fabrication comprises at least one substantially planar grinding disc equipped with a conventional set of grinding tools. This substantially planar grinding disc coacts with a perforated plate. The perforations or holes of the perforated plate are provided at a side of the perforations or holes which confronts the grinding disc with grinding edges suitable for achieving a desired refinement processing or treatment of the fiber stock suspension. These perforations or holes experience a force flow of the fiber stock suspension through such perforations or holes.

Abstract: A cleaning device serves for cleaning sensing or sensor rollers which are mutually biased towards each other and between which travels a fiber sliver. Roll cleaning is effected by means of a scraper blade which, in accordance with the invention, is moved intermittently into a scraping position and away therefrom. This provides the advantages of reduced wear on the scraper blade provided at the cleaning device and also reduced wear on the peripheral surface of the associated sensing or sensor roller which is to be cleaned.

Abstract: A band or strap of synthetic material, for instance thermoplastic material, placed as a ligature around a package or article to be wrapped is tensioned and its ends connected together, for instance by friction welding, by means of a tensioning and connecting apparatus for connecting overlapping strap ends of synthetic or thermoplastic material. The tensioning and connecting apparatus comprises a clamping member or shoe for restraining or holding the innermost end of the band or strap, a connecting or friction welding device and a tensioning device in the form of a slotted wheel located subsequent to the connecting or friction welding device as viewed in the direction from which tension is applied. The connecting or welding procedure involves a transverse motion such as vibration or oscillation of the innermost, free end of the strap or band relative to the longitudinal axis of the strap.

Abstract: A chuck is adapted to be cantilever-mounted for rotation about a longitudinal axis thereof in a winding machine for threads, such as synthetic plastics filament, glass fiber strands and so forth. The chuck comprises a chuck member and an element movable radially thereat between retracted and extended positions under the action of centrifugal force when the chuck is rotated about its longitudinal axis at or above a predeterminate operating speed in use. The element has a head portion which projects radially outwardly from the bobbin tube receiving surface of the chuck member of the chuck when the element is in its extended position, and is located inwardly of such bobbin tube receiving surface when the element is in its retracted position.

Abstract: The adjusting device possesses a hydraulic cylinder in whose cylinder tube there are housed a main piston equipped with a piston rod, an auxiliary piston and a force-exerting spring. The cylinder tube is closed off at both of its ends by an associated end flange. The outer surface of the cylinder tube simultaneously constitutes the guide surface of a guide tube which is fixedly connected by means of a connecting flange with the piston rod. Since the cylinder tube possesses an essentially constant or uniform inner diameter and outer diameter, the guide tube can be constructed to be so long that the adjusting device is stable enough to serve as a supporting column or pillar, e.g. for a chair or other seat structure.

Abstract: An inexpensive and reliable regulating apparatus contains between a regulating unit and an electric motor series-connected therewith a feedback path for a single tachometer signal and including a band-pass filter. The band-pass filter determines the operating range of the electric motor. The regulating unit is constructed such that during operation the electric motor is supplied with power only when a signal from the feedback path arrives at the regulating unit. Under the action of external disturbances the supply of power is interrupted at least for a predetermined duration of time.

Abstract: In a controlled deflection roll, hydrostatic support elements are used which can be tilted to an increased extent only in the axial direction but not in the circumferential direction of the roll shell. Deflection or bending of the stationary support member, on which the roll shell is supported by the hydrostatic support elements is compensated by the axial tilting capacity of such hydrostatic support elements. The transverse forces occurring during operation of the controlled deflection roll are automatically compensated by the supporting directions or direction of action of at least outer bearing pockets of the hydrostatic support elements and which form a predeterminate angle with the pressing direction, so that force components directed in the circumferential direction are formed which substantially counteract the prevailing transverse force.

Abstract: An apparatus is disclosed in which only one working point or machining point on a machining tool, which in general can comprise a grinding wheel or disc, is in machining contact with a workpiece such as a gear blank during a machining operation. The position of this single working or machining point can be selectively chosen within a machining region of the grinding wheel or disk and can be prescribed to lie in a zone of fixed or variable radius of the grinding wheel or disk. This is achieved through at least one feed motion, in general a feed motion of the grinding wheel or disc, effected in addition to feed motions known per se in machining processes performed essentially according to the indexing generating method. This means that the machining contact point between the grinding wheel or disk and the gear blank does not wander on the grinding wheel or disk in correspondence with the generating feed motions but can be confined to a predeterminate region.

Abstract: There are disclosed one-piece chuck structures for use in winding machines and particularly, but not exclusively, for use in high speed winding machines for the take-up of synthetic plastics filament. These one-piece chuck structures comprise a first elongated tubular portion adapted to receive one or more bobbin tubes and a second elongated tubular portion integral with the first elongated tubular portion and of reduced external diameter relative thereto. Bearings cooperate with the exterior of the second elongated tubular portion such that the first elongated tubular portion and the second elongated tubular portion are rotatable about a common longitudinal axis. Also disclosed are hollow bobbin tube-engaging elements as well as double-arm tube-positioning members which can be used with such and other chuck structures.

Abstract: Printed products arriving in an imbricated formation are wound-up into a product or package roll about which there is placed a wrapper or envelope which retains together the package roll. For easier handling of the product or package roll such is provided with an endless carrying loop. This endless carrying loop is formed by a carrying element, such as a knotted cord, rope, string or the like which extends through an internal opening or hollow interior of the product or package roll and to the outer side or surface of such product or package roll.

Abstract: A method and apparatus are disclosed in which only one working point or machining point on a machining tool, which machining contact with a workpiece such as a gear blank during a machining operation. The position of this single working or machining point can be selectively chosen within a machining region of the grinding wheel or disk and can be prescribed to lie in a zone of fixed or variable radius of the grinding wheel or disk. This is achieved through at least one feed motion, in general a feed motion of the grinding wheel or disc, effected in addition to feed motions known per se in machining processes performed essentially according to the indexing generating method. This means that the machining contact point between the grinding wheel or disk and the gear blank does not wander on the grinding wheel or disk in correspondence with the generating feed motions but can be confined to a predeterminate region.

Abstract: Infeed devices serve to individually place in straddling formation printed signatures or sheets upon collating conveyors equipped with pusher entrainment members. There are provided a plurality of mutually parallelly extending collating conveyors arranged at a substantially uniform circumferential spacing from one another about an axis of revolution. These collating conveyors revolve about such axis of revolution. In order to obtain an essentially coincident or congruent alignment of the edges of the printed signatures or sheets during collation thereof there is provided at the region of the transfer location of each of the infeed devices an associated impact element in order to force the printed signatures or sheets against the associated pusher entrainment member.

Abstract: A cymbal made of bronze which contains primarily copper and tin. Tin is present in the range of 13 to 18 percent by weight. This cymbal permits an advance into a totally new sound dimension or sound effects.