Abstract: A drawing and spinning apparatus of mixed yarns for air spinning machines with multiple feeds comprises at least a first and a second introducer element, an air spinning device, a drawing device, interposed between the introducer elements and the air spinning device, an air spinning chamber, an introducer nozzle shaped to receive the webs from the drawing device into respective insertion channels and introduce the webs into the spinning chamber according to a longitudinal feeding direction. With respect to a cross-section plane perpendicular to the longitudinal feed direction, groove bottoms of each of the two insertion channels of the webs into the chamber are aligned along a segment which is offset by an eccentricity with respect to a geometric centre of the chamber itself, through which a symmetry axis of the spinning chamber passes, the eccentricity being less than 5% of a maximum diameter of the spinning chamber.

Abstract: A spinning apparatus with continuous adjustment of a yarn accumulation system includes at least one spinning head including a spinning device including a spinning chamber for yarn production, a reel on which yarn produced by the spinning device is wound, the reel being rotatably influenced by a yarn guide shaped to impart a rotation movement of the reel for winding the yarn and a traversing movement of the yarn winding on the reel, an accumulation device arranged between the spinning device and the reel and shaped to create a reservoir of yarn not wound on the reel, a joining device including joining means to join together a first yarn end associated with the spinning device and a second yarn end associated with the reel, and a processing and control unit programmed to control the yarn guide to adjust accordingly the amount of yarn accumulated in the accumulation device.

Abstract: An air-jet type spinning device (4), comprising a body (8) at least partially hollow which defines a spinning chamber (12), a fibre feeding device (16) that feeds fibres into the spinning chamber (12), and a spinning spindle (20) including a spinning channel (24) for the suction of yarn obtained from the fibres. The device (4) including at least one channel (28) for sending a jet of compressed air inside the spinning chamber (12). A flow amplifier (32) comprising an expansion chamber (36) is in fluidic connection with the outside of the body (8), wherein the at least one channel (28) comes out in an emission point (40) inside the expansion chamber (36), to introduce compressed air at an inlet cross-section (44). The expansion chamber (36) comprises an outlet mouth (48), fluidically connected to the spinning chamber (12) and having an outlet cross-section (52) smaller than the inlet cross-section (44).

Abstract: A drawing and spinning apparatus of mixed yarns for air spinning machines with multiple feeds comprises at least a first and a second introducer element, an air spinning device, a drawing device, interposed between the introducer elements and the air spinning device, an air spinning chamber, an introducer nozzle shaped to receive the webs from the drawing device into respective insertion channels and introduce the webs into the spinning chamber according to a longitudinal feeding direction. With respect to a cross-section plane perpendicular to the longitudinal feed direction, groove bottoms of each of the two insertion channels of the webs into the chamber are aligned along a segment which is offset by an eccentricity with respect to a geometric centre of the chamber itself, through which a symmetry axis of the spinning chamber passes, the eccentricity being less than 5% of a maximum diameter of the spinning chamber.

Abstract: An air-jet type spinning device (4), comprising a body (8) at least partially hollow which defines a spinning chamber (12), a fibre feed device (16), facing said spinning chamber (12) so as to feed the fibres into the spinning chamber (12), a spinning spindle (20) at least partially inserted in the spinning chamber (12) and fitted with a spinning channel (24) for the suction of yarn obtained from said fibres, the spinning channel (24) defining a spinning direction (X-X), at least one channel (28) for sending a jet of compressed air inside the spinning chamber (12). Advantageously, the spinning chamber (12) is delimited at least partially by an outer side wall (32), opposite the spinning spindle (20), wherein at least one thread (36) is made on said outer side wall (32), wherein said at least one channel (28) is oriented so as to direct the jet of compressed air towards the at least one thread (36) in order to be guided and oriented by the latter.

Abstract: Device for generating and controlling a yarn reserve to be installed on service trolleys with open-end spinning frames, for reattachment and start-up interventions on the spinning unit, comprising a mouthpiece which sucks and generates in its interior a loop of reserve yarn, equipped, inside, with sensors for detecting the dimension of the loop of reserve yarn and consequently piloting the reattachment procedure and reconsignment of the bobbin to its standard functioning.

Abstract: Driving system for open-end spinning machines, in particular of open-end spinning rotors, in which the power necessary for the driving of said rotors is distributed between two electric motors situated at the head and tail-end of the spinning machine, with a common belt transmission, the rotation of the tail-end motor being subordinate to the rotation of the motor at the head.

Abstract: Thread-guide device with modulated traversing with an individual thread-guide with a back-and-forth movement fixed to a cord open at the two ends and moved between two pulleys in an alternating clockwise/anticlockwise movement, each activated with its own electric motor, both motors being piloted in frequency. The pulleys are connected to springs which pull the thread-guide towards the centre of its run and which alternatingly accumulate and release energy with every run of the thread-guide.

Abstract: Thread-guide device with modulated traversing with an individual thread-guide having a back-and-forth movement fixed to a flexible element, moved between two pulleys in an alternating clockwise/anticlockwise movement, each driven by its own electric motor, both motors being piloted and coordinated to a control unit.

Abstract: Driving system for open-end spinning machines, in particular of open-end spinning rotors, in which the power necessary for the driving of said rotors is distributed between two electric motors situated at the head and tail-end of the spinning machine, with a common belt transmission, the rotation of the tail-end motor being subordinate to the rotation of the motor at the head.

Abstract: Device and process for the regulation of thread winding onto a bobbin by applying a desired contact pressure Pc of the operating bobbin, providing the bobbin-holder arm with a counterweighing counterthrust Pp, on the basis of a pre-established trend of the value of Pc in relation to the advance length of the bobbin, indicating the weight of the bobbin in relation to the ratio between the length reached and indicating the rising a angle of the bobbin-holder arm, calculating the weight component due to the bobbin and said arm and applying a counterthrust Pp equal to the difference between said component and the pre-established value of the contact pressure Pc referred to the length reached.

Abstract: Service trolley for open-end spinning machines having on-board members dedicated to the intervention cycles comprising a device for determining the position of the thread with respect to such members of the trolley that comprises a worm screw, with a horizontal axis parallel to the spinning machine, which engages the thread with its threading, said device being able to be lifted and actuated in commanded clockwise/anti-clockwise rotation to determine both the level of the thread and its axial coordinate.

Abstract: Service trolley for open-end spinning machines equipped with members dedicated to the operations in the intervention cycles and managed by the trolley's own control unit in which each member is independent from the others, being equipped with independent actuation controlled by sensors for the various steps of the intervention cycles.

Abstract: Device for the continuous treatment of yarns with process fluids comprising a Venturi nozzle fed with process fluid as driving fluid to feed the yarn to the treatment, a distributor for distributing the yarn in the treatment reactor according to a layer of superimposed swirls, a tank reactor, internally equipped with a saddle-shaped guiding surface on which the threads arranged in a layer first descend for immersion and then rise emerging from the process fluid.

Abstract: Device for reducing the fluff of a yarn comprising a longitudinal duct for the passage of the yarn, and ducts for the injection of air, tangential to the yarn, forming a vortex in accordance with the yarn twist, without the interposition of deviation and control means for generating a balloon.

Abstract: Method and relevant device for stabilizing and regulating the tension of a thread (16) being unwound from a bobbin (18). The method envisages the addition to the unwinding tension (td), of a resistant tension automatically variable in relation to the intensity of the unwinding tension (td).

Abstract: A continuous treatment system of yarns with process fluids, particularly for mercerization, wherein a bundle of threads to be treated is put into the reaction with a Venturi nozzle activated with process fluid, which entrains the bundle of yarn with it, and with a swirl distributor in the J-shaped treatment reactor, having an inner saddle-shaped guide surface for the downward and upward movement of the yarn in the process fluid bath.

Abstract: Tailstock device to be applied to the cone-holding arm (26) of collection units (3) of spinning stations (1) of open-end spinning machines wherein the quill is engaged by a toothed tailstock provided with a skew pyramidal toothing on the face presented to the base of the quill.

Abstract: Introducing/removing device of the end of the thread for an automatic service trolley for spinning units of open-end spinning machines comprising a moving structure, capable of taking a gripping member into various working positions and equipped with a gripping member consisting of a pair of parallel motorised rollers pressed against each other according to their generatrices, equipped with actuation in commanded and controlled rotation in the two directions, to introduce and re-extract the end of the thread in the rotor.

Abstract: Blocking device of the unwinding of the threads from the feeding bobbins of a twisting spindle with superimposed bobbins inserted on their hollow pin, in which the threads are blocked with mechanical interceptors brought into their unwinding range at the entrance of the respective hollow pins and activated by means of sensors of the twisted thread situated downstream of the thread-guide curl.