Abstract: A bobbin transport system for spinning frames for supplying bobbins from bobbin reservoirs to spinning frames in a spinning mill. The spinning frames are divided into dedicated machine groups and a common machine group or groups. Bobbins are supplied to the dedicated machine groups by way of a main transport path and/or a sub transport path, and a communicating transport path for transferring bobbins from the sub transport path to the main transport path is provided for each of the spinning frames of the common machine group or groups. The bobbin transport system for spinning frames makes it possible to change the allotment of numbers of spinning frames for different types of yarns to be set for the common machine group or groups and to distribute different types of bobbins accurately to predetermined spinning frames thereby to enable production of several articles by small quantities without deteriorating the availability factor of the entire spinning frames.

Abstract: A flat multifilament yarn having a very soft unique touch is obtained by arranging two or more types of multifilament yarns having different drawings properties in parallel, and applying a false twisting procedure which includes a twist applying and twist releasing operations to the paralleled multifilament yarn at a temperature of 120.degree. C. or less, and subjecting the resultant false twisted composite yarn to a heat treatment at a temperature of 130.degree. C. or more in a subsequent procedure, the resultant high elongation multifilaments derived from the high drawability multifilaments in the multifilament yarn having a crystallinity (density method) of 10% to 30%, a non-crystalline portion orientation of 0.035 to 0.10, a non-crystalline portion density of 1.31 to 1.36 g/cm.sup.3, and a Young's modulus of 200 to 700 kg/mm.sup.2.

Abstract: A device for the storage of a yarn of limited length spun on a spinning machine, comprising a suction pipe and a yarn storage chamber. The suction pipe is connected to a negative-pressure line and serves to seize the yarn by means of suction air. The yarn storage chamber is located between the negative pressure line and the suction pipe. The yarn can be aspirated into the yarn storage chamber and can be drawn off once more in the direction opposite to the direction of aspiration. The yarn storage chamber is located in a body which is rotatably mounted.In the process for the storing of the yarn, the yarn is seized by the stream of suction air and is sucked through the suction pipe into the yarn storage chamber. The yarn is accumulated against the screen surface of the yarn storage chamber until the stream of suction air in the suction pipe is weakened to a point where additional aspiration of more yarn is prevented.

Abstract: In the case of a drafting unit for a spinning machine having a drafting zone, which is delimited by two pairs of rollers each consisting of top rollers and bottom rollers and in which an apron guide is located, it is provided that the diameter of at least the bottom roller of the following pair of rollers is smaller than the diameter of the bottom roller of the preceding pair of rollers.

Abstract: Potential bulky polyester associated bundles or yarns for woven or knitted fabric include spontaneously heat extensible multi-filament A and heat shrinkable multi-filament B. The associated bundles are interlaced at 20-100 interlaces/m. For multi-filament A, the following physical properties apply: <3 denier as a single bundle; 20-80% denier ratio content in associated bundles, wet shrinkage at 100.degree. C. (SHW (A))=0-5%, dry shrinkage at 160.degree. C. (SHD (A))=-15-0%. The properties pertaining to multi-filament B include: fracture tenacity>4 g/denier, denier ratio of 80-29% content in associated bundles, SHW (B)>5-60%. Additionally, SHD (B)-SHD(A)>5%. The invention also relates to processes for forming the bundles and for weaving the bundles into fabric.

Abstract: Interlacing means are provided for the interlacing of multifilament yarns exhibiting a yarn channel. At given distances from the entrance and exit openings forming the yarn channel, yarn guides are so arranged that, with the supply of compressed air shut off, the yarn is laid onto the yarn channel so that it extends parallel to its longitudinal direction, and that the straight yarn sections, which are located between the entrance and exit openings of the yarn channel and the yarn guides, are inclined at acute angles to portions of the geometric longitudinal axis of the yarn channel. Furthermore, the blow angle of the blow nozzle is smaller than 90.degree.. The length of the yarn channel equals for smooth yarns maximally 40 mm and for texturized yarns maximally 30 mm. There results exceptionally high yarn advance speeds and a particularly good vortexing of the yarn.

Abstract: A machine for slitting sheet material into continuous strips and winding those strips into coils includes a change-over mechanism by which a fully wound coil is replaced by a replacement core and the winding of a subsequent coil proceeds without interruption of the winding process.

Abstract: A multi-position rotary spinning machine includes an endless belt guided along the machine past a plurality of open-end spinning units each having a valve for operation by cam means of the belt to bring an eccentric port into and out of gas communication with another eccentric port of the valve by virtue of rotation of a rotary valve member driven by engagement of cam studs and carried by the belt with projections, respectively, of the rotary valve member.The valves can be used for providing intermittent application of purging suction to the beater trash box of an open-end spinning or to a slub collection trough of a friction spinner.

Abstract: A core/wrap yarn forming system comprising two or more channels extending outwardly from the nip of the front draft rolls of a ring-spinning system; wherein each channel's entrance is closely adjacent to the nip; wherein the entrances are spaced apart from one another; wherein the channels merge with one another at the exit from the device; wherein the first channel is essentially straight throughout its length, and is perpendicular to the nip; wherein each of the other channels is curved to guide the strand therein in a convex pathway with respect to the first channel, and converge inward to the end of the first channel. The core is supplied through the straight channel, while one or more wrapping strands pass through the curved channel or channels, and wrap around the core where all the channels merge. The wrapped yarn then is passed to an ordinary ring traveler and wind-up spindle of a ring-spinning assembly.

Abstract: In the case of a process for stopping and restarting a machine for pneumatic false-twist spinning, it is provided that the start-up time and the slow-down time of the main motor are controlled to preselected values, so that the switching-on and switching-off operations for air nozzles may take place as a corresponding function.

Abstract: A funnel for delivering yarn for building a package on a spindle of a spinning machine has an entry channel for the passage of yarn therethrough into the interior of the funnel and an exit opening for the passage of yarn therethrough from the interior to the exterior of the funnel, the interior of the funnel having a lateral extent sufficient to allow the formation of a yarn balloon of controlled extent during building of the package on the spindle. The funnel can contain a guide portion projecting interiorly of the funnel at a spacing from the entry channel and a neck portion in which the entry channel is formed.

Abstract: An operation starting method for a spinning machine of the type wherein a draft device, an air jetting nozzle and a false twisting device of the nip belt type are disposed in this order, constituted such that, in a condition of the false twisting device wherein belts are held in contact with each other at a nip point, when operation of the spinning machine is started, an air flow directed toward the false twisting device is produced on the air jetting nozzle side of the false twisting device while another air flow directed away from the false twisting device is produced on the opposite side of the false twisting device to the air jetting nozzle.

Abstract: A yarn guide device for a two-for-one twister comprises a guide pipe disposed upright above yarn packages placed on a spindle, which guides yarns unwound from the yarn packages into the bore of the packages from above the same, and a freely rotatable ring member provided on the guide pipe to be contacted with the yarns and to bend slightly a yarn path at the peripheral end thereof. The ring member is rotated by the yarns released from the package in a direction of releasing of the yarns.

Abstract: The corespun yarn is formed on a friction spinning apparatus and comprises three components, including a core of high temperature resistant fibers, a core wrapper of low temperature resistant fibers surrounding and covering the core, and an outer sheath of low temperature resistant fibers surrounding and covering the core wrapper and the core. The high temperature resistant fibers of the core are selected from the group consisting essentially of aramid fibers (Kevlar and Nomex), and polybenzimidazole fibers (PBI). The low temperature resistant fibers of the core wrapper and the outer sheath are either natural or synthetic fibers, such a cotton and polyester.

Abstract: A false twisting roll for imparting false twist to an advancing yarn of manmade fibers is disclosed. The roll has a generally conical and somewhat concave surface configuration, and the angle of inclination of the roll axis is adjustable with respect to the yarn path leading into contact with the roll. To insure optimal twisting conditions at all adjustable inclinations of the roll, the position of the pivotal axis of the roll, and the shape of the surface of the roll are adapted to each other so that the yarn path leading into contact with the roll is predetermined and remains constant. This in turn assures that the upstream twisting conditions of the yarn are unchanged.

Abstract: A method and apparatus for supplying sliver to the spinning stations of a spinning machine to wind a batch of a predetermined number of packages includes a sliver can transfer device, a sliver can conveying device, a sliver can filling device and a computer for controlling the operation of the various sliver can handling devices. Each spinning station is initially provided with a sliver can having a differing amount of sliver therein than the other sliver cans as the winding of the packages of the batch is commenced. The spinning stations are then continuously individually provided with fresh cans of sliver having a uniform amount of sliver therein during the normal running of the batch.

Abstract: Disclosed is a worsted yarn-like false-twisted yarn composed of large-denier multifilaments having a thickness of at least 4 de and small-denier multifilaments having a thickness of 0.

Abstract: An apparatus for making a yarn consists of at least one ring spinning mechanism and a drawing mechanism, which precedes the ring spinning mechanism and defines at least one draft path for drawing a fibrous roving and includes two delivery rollers defining a clamping nip for the drawn roving, wherein one of said delivery rollers constitutes behind the clamping nip a guiding surface for deflecting the drawn roving. In order to increase the strength of the yarn, it is proposed that the delivery roller which constitutes the guiding surface for deflecting the roving constitutes at least near the delivery end of the guiding surface a slideway for guiding the roving transversely to its axis as the roving is twisted between the ring spinning mechanism and the drawing mechanism.

Abstract: A yarn feeding funnel for a textile spinning machine having an upper shaft portion and a body portion. A yarn inlet opening in the upper shaft portion is radially offset from the axis of rotation of the yarn feeding funnel and facilitates the formation of a yarn balloon of controlled extent between the yarn inlet opening and a yarn guiding eye which is coaxial with the funnel rotation axis. A plurality of alternative yarn inlet openings, each at a predetermined, different radial spacing from the funnel rotation axis, may be provided to vary the characteristics, such as the diameter, of the yarn balloon formed between the yarn inlet opening and the yarn guiding eye.

Abstract: The cap of a cap spinning device comprises a thread introduction attachment in the top or upper region of the cap. In this thread introduction attachment there is arranged an inlet passage which is upwardly directed at an inclination and provided for the thread coming from the drafting arrangement via a thread eye, so that a balloon is formed between the thread eye and the top or upper side of the cap.