Abstract: A drafting frame is provided with at least one compaction unit in which a belt with a perforation under suction serves to draw together the fibers of a drafted roving. The belt is juxtaposed with a stripper spaced from the belt to remove fiber accommodations thereon. The gap between the stripper edge and the belt is adjustable.

Abstract: A process for producing different types of windings, especially a flyer winding or a composite winding, in the formation of a spool on a core sleeve of a spindle in a draft-twisting machine or frame in which, instead of displacing the ring rail over the full height of the spool to be formed, the full height is subdivided into zones and the ring rail is reciprocated in each of these zones only through a fraction of the total structure of the ring rail. During the winding in each zone, the spindle speed is held approximately constant and the spindle speed is changed only upon a transition from one zone to another.

Abstract: A transporter for textile plants having upstream machines providing full bobbins to downstream machines returning core sleeves to the upstream machines. The transport system has a suspension track extending in a loop around a plurality of the downstream machines for each upstream machine and provided with switches and shunts which allow reconfiguration of the loop which can have a diverting stretch for use when the downstream machine is shunted and for including one or more machines of the adjacent loops when desired in the first-mentioned loop. In all configurations, the path length is substantially the same and the length of the transporter is only slightly less so that a gap is provided between the leading and trailing ends of the transporter.

Abstract: A bobbin changer is used in combination with a first textile machine having a first conveyor extending along an endless first path moving full bobbins or empty sleeves into the first machine and full bobbins or empty sleeves out of the first textile machine, a second textile machine having a second conveyor extending along an endless second path extending at a location adjacent the first path and moving full bobbins into the second textile machine and empty bobbins out of the second textile machine, and a third textile machine having a third conveyor extending along an endless third path extending at the location adjacent the first and second paths and moving full bobbins out of the third textile machine and empty sleeves into the third textile machine.

Abstract: A rotation preventing apparatus presents rotation of the spindles of a textile machine due to the rotative forces applied by yarn tension during de-actuation of the drive motors of the spindles. The rotation preventing apparatus includes a reciprocable member supporting a plurality of brake shoe components adjacent the spindles and a commonly actuating assembly including pneumatic cylinder and piston members for reciprocably moving the reciprocable member between a position in which the brake shoe components brakingly contact the spindles and a position in which the brake shoe components are displaced from the spindles to permit normal rotation thereof. According to one aspect of the present invention, a contoured plate member is substituted for the brake shoe components. According to another aspect of the present invention, an expandable elastomeric member is supported adjacent the spindles and is selectively expandable to brake the rotation of the spindles.

Abstract: A system for preparing for transport roving bobbins having a multiplicity of roving windings and a free end carried on an elongated bobbin core comprises a holder engageable with the windings for retaining the free end tightly against the windings. This holder can be an annular element or elastically deformable ring engaged at least partially around the windings on the bobbin and made of a durable synthetic resin. The ring can be discontinuous, formed with a crosswise throughgoing slot and of arcuate outwardly concave section. The outwardly concave shape is useful for engagement by an automatic handling fork.

Abstract: A rotation preventing apparatus prevents rotation of the spindles of a textile machine due to the rotative forces applied by yarn tension during de-actuation of the drive motors of the spindles. The rotation preventing apparatus includes a reciprocable member supporting a plurality of brake shoe components adjacent the spindles and a commonly actuating assembly including pneumatic cylinder and piston members for reciprocably moving the reciprocable member between a position in which the brake shoe components brakingly contact the spindles and a position in which the brake shoe components are displaced from the spindles to permit normal rotation thereof. According to one aspect of the present invention, a contoured plate member is substituted for the brake shoe components. According to another aspect of the present invention, an expandable elastomeric member is supported adjacent the spindles and is selectively expandable to brake the rotation of the spindles.

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: An apparatus for aligning a textile strand supple device and a strand guide of a drafting device of a textile machine is provided for initially inserting a textile strand into the strand guide. The strand guide of the drafting device is typically reciprocally moved transversely to the direction of feed of the textile strand and the aligning apparatus of the present invention includes a device for securing the strand guide at a predetermined position along its reciprocating path at which a conventional movable service unit can be positioned for initially inserting a textile strand into the strand guide. According to another aspect of the present invention, the aligning apparatus includes a motor assembly for adjustably moving the textile strand supply device in response to the sensed position of the strand guide of the drafting device.

Abstract: The spinning or twisting machine comprises a plurality of drafting rolls, a plurality of associated spindles and positioned between them a plurality of yarn breaking devices pivotable between an upright spinning machine operating position into a yarn breaking position. According to our invention the yarn breaking device is movable by a positioning device from its yarn breaking position into an operating position.

Abstract: In the transport apparatus for roving bobbins in a plant including a group of spinning machines according to our invention each spinning machine has a closed circulating belt on which suspended carriages equipped either with full or empty roving bobbins are movable. A transport belt is provided which runs through a loading station which replaces empty roving bobbins with full roving bobbins. Each of the circulating belts is connected with the transport belt by one connecting belt for removing one of the suspended carriages with empty roving bobbins and another connecting belt for feeding in another suspended carriage with full roving bobbins. A switch controllable depending on the filling state of the approaching roving bobbin carriage is positioned at each branch of the connecting belts with the transport belt or one of the circulating belts. The roving bobbins are mounted on the transport and circulating belts so as to be movable independently of each other.

Abstract: A device attached to a spinning or twisting machine, designed to monitor the integrity of two threads merging under tension into a yarn, has a carrier swingable about a horizontal axis and provided with a thread guide, such as a pair of parallel pins, bracketing the yarn downstream of the merger point. A rupture of either thread lets the carrier rotate, e.g. by gravity, from an unstable normal position by half a turn into a stable off-normal position to impede the advance of the remaining intact thread whereby the latter also breaks. Such action, however, is prevented when the yarn is under reduced tension, as during shutdown or startup of the machine, by a locking mechanism arresting the carrier in its normal position. The locking mechanism may include an electromagnet whose winding can form part of a circuit signaling the displacement of the carrier into its off-normal position in response to a thread break.

Abstract: A draw frame of a sliver-drafting apparatus has three cascaded roller pairs whose lower rollers are driven by respective motors at speeds determined by associated frequency dividers and/or multipliers in the output of a common oscillator of adjustable operating frequency. The slivers drafted by the roller pairs form, after doubling or plying, a fiber bundle traversing a thickness sensor whose output, integrated over predetermined time periods, is used by a microcomputer to ascertain optimum nip-line spacings and contact pressures reducing the thickness variations to a minimum.

Abstract: A draw frame of a sliver-drafting apparatus has three cascaded roller pairs whose lower rollers are driven by respective motors at speeds determined by associated frequency dividers and/or multipliers in the output of a common oscillator of adjustable operating frequency. The slivers drafted by the roller pairs form, after doubling or plying, a fiber bundle traversing a thickness sensor whose output, integrated over predetermined time periods, is used by a microcomputer to ascertain optimum nip-line spacings and contact pressures reducing the thickness variations to a minimum.

Abstract: A device attached to a spinning or twisting machine, designed to monitor the integrity of two threads merging under tension into a yarn, has a carrier in the form of a disk or a stem rotatable about an axis and provided with a thread guide such as an eyelet, or a pair of pins parallel to that axis, bracketing the yarn downstream of the merger point. A rupture of either thread, detected by a separate sensor or by one of the bracketing pins, generates or releases a force which rotates the carrier around its axis by about half a turn to impede the advance of the remaining intact thread whereby the latter also breaks and the machine is stopped automatically, or manually in response to an alarm signal.

Abstract: A spinning frame is provided with a fiber break guard having a fiber guide which as a consequence of the breaking of one of the individual fibers is displaced to cause the breaking of the other fiber. For a certain and rapid breaking of the remaining fiber, the displacement of the fiber guide caused by the remaining fiber, or at least the displacement of an associated member causes a pinching of the remaining fiber in a clamping device or the activation of a fiber separation device for cutting through the remaining fiber.

Abstract: A ring spinning machine for spinning yarns comprised of finite length fibers has a plurality of spinning locations for combining two untwisted textile strands into a yarn to which a twist is imparted prior to winding up of the yarn. A sensor is associated at each spinning location which reacts to a break of one of the two fiber strands and causes an interruption of the spinning of the yarn. The sensor is designed to sense a characteristic of the yarn which changes in a manner recognizable by the sensor when the yarn is only being spun from one of the two fiber strands and an interrupter is provided which acts in response to the signal from the sensor to interrupt the spinning of the yarn upon the detection of a strand break.

Abstract: A roving moving to a spinning machine passes between top and bottom input rolls of which the top roll is adapted, upon breakage of the roving, to be raised by a lift member which is movable into engagement with the spindle of the top roll and carries with it a clamping element which serves to clamp the incoming broken end of the roving against the top roll to retain it ready for subsequent rethreading into the nip of subsequent drafting rollers.