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.

A yarn spinning system has a sliver feeding part feeding a main material used for yarn formation; a main spinning unit in which the spinning procedure of the main materials is performed; suction pipes present in the main spinning unit and enabling the intake of waste fiber formed during spinning; the draft cylinders enabling orderly drawing and smoothing of the main material (fiber) fed into the system; additionally to provide conveying the injected yarns fed into the system to a draft area through the yarn feeding path; and enabling fancy yarn production by conveying the injected yarns to the main spinning unit by being centered on the main material via the yarn guide.

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.

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.

A nanofiber sheet dispenser that houses a nanofiber forest from which a nanofiber sheet can be drawn is described. Using the nanofiber sheet dispenser, a nanofiber forest disposed on a substrate can be moved, transported, and/or shipped with a reduced risk of damage relative to transporting a nanofiber sheet. Techniques are also described for configuring the nanofiber sheet dispenser so that a nanofiber sheet can be conveniently drawn from the forest and, in some cases, drawn so as to form a nanofiber yarn that is continuous with both the nanofiber sheet and the nanofiber forest, the latter of which is within the nanofiber sheet dispenser.

A sliver feeder for a textile machine having at least one pick-up unit and at least one feeder unit. In order to improve the handling of fiber material and to increase the quality of a sliver to be transferred to a pre-compactor and thereby increase the process stability and thereby save resources, the pick-up is designed and arranged to pick up a sliver, in particular from a can of the textile machine, and to transfer the sliver to the feeder unit, wherein the feeder unit has a takeover section and is designed and arranged in such a way as to transfer the sliver to a sliver guide, in particular to a pick-up section of a pre-compactor.

A sliver feeder for a textile machine having at least one pick-up unit and at least one feeder unit. In order to improve the handling of fiber material and to increase the quality of a sliver to be transferred to a pre-compactor and thereby increase the process stability and thereby save resources, the pick-up is designed and arranged to pick up a sliver, in particular from a can of the textile machine, and to transfer the sliver to the feeder unit, wherein the feeder unit has a takeover section and is designed and arranged in such a way as to transfer the sliver to a sliver guide, in particular to a pick-up section of a pre-compactor.

A multifunctional nozzle for a spinning machine used to produce real-twist yarn. The multifunctional nozzle comprises a nozzle channel open on one side in a nozzle housing and in which a vortex flow can be generated. A nozzle body which is shorter than the nozzle channel is provided with a through-channel for the passage of a thread or fibre band. An annular gap with a narrow point is formed within the nozzle channel. The annular gap tapering on both sides at the narrow point. The narrow point is arranged downstream of a fluid inlet which leads to the nozzle channel. A hollow body-type flow conducting body is provided between the annular gap and the open end of the nozzle channel for guiding the thread or fibre band together with a fluid, the annular gap being formed between the nozzle body and the nozzle housing and/or the flow conducting body.

A multifunctional nozzle for a spinning machine used to produce real-twist yarn. The multifunctional nozzle comprises a nozzle channel open on one side in a nozzle housing and in which a vortex flow can be generated. A nozzle body which is shorter than the nozzle channel is provided with a through-channel for the passage of a thread or fibre band. An annular gap with a narrow point is formed within the nozzle channel. The annular gap tapering on both sides at the narrow point. The narrow point is arranged downstream of a fluid inlet which leads to the nozzle channel. A hollow body-type flow conducting body is provided between the annular gap and the open end of the nozzle channel for guiding the thread or fibre band together with a fluid, the annular gap being formed between the nozzle body and the nozzle housing and/or the flow conducting body.

A spinning unit is provided for an air jet spinning machine with a spinning nozzle used to manufacture yarn from a fiber strand. The spinning nozzle has an inlet for the fiber strand, a vortex chamber, a yarn forming element protruding into the vortex chamber, and a draw-off channel for the yarn. An additive supply is assigned to the spinning nozzle and designed so that the spinning nozzle is supplied with an additive. The yarn forming element has at least one additive duct that ends in the vortex chamber or the draw-off channel. The additive supply encompasses an additive supply line connected to the additive duct so that an additive introduced into the additive duct via the additive supply line can be introduced into the draw-off channel and/or the vortex chamber. A process for operating an air jet spinning machine with at least one spinning unit is provided. An additive is added, at least intermittently, to the spinning nozzle of the spinning unit while it is operating with the help of an additive supply. The added additive is delivered through an additive duct of the yarn forming element to the draw-off channel and/or the vortex chamber.