A drawing apparatus (4) for air spinning machines with multiple feeds, comprising: at least a first and a second introducer element (8,12), independent of each other, so as to be able to feed simultaneously at least two separate slivers (N1, N2) of textile fiber, an air spinning device (16) suitable to spin said slivers (N1, N2) of textile fiber, a drawing device (24) placed. between the introducer elements (8, 12) and the air spinning device (16), comprising a plurality of pairs of drawing rollers (28), comprising one drive roller (32) and one idle roller (36) per pair, said drawing rollers (28) being suitable to perform a progressive drawing of each sliver simultaneously intercepted by them, characterized in that at least one drive roller (32) of a pair of said drawing rollers (28), is mechanically split into a first drive roller (40) which intercepts a first sliver (N1) and a second drive roller (44) which intercepts the second sliver (N2), said first and second drive rollers (40,44) being operatively connected to separate drive means so that they may be operated at different speeds of rotation, to perform different degrees of drawing of the two slivers (N1, N2) intercepted by said first and second drive roller (40,44), wherein said first drive roller (40) is associated with a first idle roller (52) and said second drive roller (44) is associated with a second idle roller (56), said idle rollers (52,56) being mechanically separate from each other.

An air-jet type spinning device (4), comprising an at least partially hollow body (8) which delimits a cylindrical spinning chamber (12), the body comprising at least one injection hole (16) configured to introduce a flow of compressed air in said spinning chamber (12), a fibre feeding device (20), facing said spinning chamber (12) so as to feed the fibres in the spinning chamber (12). The fibre feeding device (20) comprises a fibre feeding channel (24) having a first straight section (28) leading, at a shoulder (32), into a pre-chamber (36) facing and communicating with said spinning chamber (12). The spinning device comprises a spinning spindle (48) at least partially inserted in the spinning chamber (12) and fitted with a spinning channel (52) for the transit of yarn obtained from said fibres, the spinning channel (52) having a main axis which defines a spinning direction (X-X), and having a front input (56) for the introduction of the yarn in said spinning channel (52). Advantageously, a diameter (60) of the spinning chamber (12), measured relative to a cross-section plane perpendicular to said main axis, is between 5.6 and 7.4 mm. [FIG. 2]

An air-jet type spinning device (4), comprising an at least partially hollow body (8) which delimits a cylindrical spinning chamber (12), the body comprising at least one injection hole (16) configured to introduce a flow of compressed air in said spinning chamber (12), a fibre feeding device (20), facing said spinning chamber (12) so as to feed the fibres in the spinning chamber (12). The fibre feeding device (20) comprises a fibre feeding channel (24) having a first straight section (28) leading, at a shoulder (32), into a pre-chamber (36) facing and communicating with said spinning chamber (12). The spinning device comprises a spinning spindle (48) at least partially inserted in the spinning chamber (12) and fitted with a spinning channel (52) for the transit of yarn obtained from said fibres, the spinning channel (52) having a main axis which defines a spinning direction (X-X), and having a front input (56) for the introduction of the yarn in said spinning channel (52). Advantageously, a diameter (60) of the spinning chamber (12), measured relative to a cross-section plane perpendicular to said main axis, is between 5.6 and 7.4 mm. [FIG. 2]

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 spinning element of an air-jet spinning nozzle for an air-jet spinning machine for producing a yarn from a sliver using an airflow. The spinning element of the air-jet spinning nozzle for the air-jet spinning machine and a corresponding air-jet spinning nozzle allows a particularly inexpensive, low-maintenance, and simple operation of an air-jet spinning machine without compromising the quality and strength of the air-jet spun yarn and without requiring frequent cleaning. This is achieved in that the spinning element has at least one fibre- and/or thread-guiding surface, an anti-adhesive coating being located on at least some sections of the fibre- and/or thread-guiding surface.

A spinning element of an air-jet spinning nozzle for an air-jet spinning machine for producing a yarn from a sliver using an airflow. The spinning element of the air-jet spinning nozzle for the air-jet spinning machine and a corresponding air-jet spinning nozzle allows a particularly inexpensive, low-maintenance, and simple operation of an air-jet spinning machine without compromising the quality and strength of the air-jet spun yarn and without requiring frequent cleaning. This is achieved in that the spinning element has at least one fibre- and/or thread-guiding surface, an anti-adhesive coating being located on at least some sections of the fibre- and/or thread-guiding surface.

A method for preparing of a workstation of an air-jet spinning machine for the resumption of a yarn spinning process after an interruption includes inserting the yarn end into an inlet opening of the spinning nozzle and transporting the yarn in a reverse motion with aid of the spinning nozzle and a fiber feeding device to a guide channel disposed before the spinning nozzle. A spinning-in yarn end is formed on the yarn in the guide channel. A yarn reserve is formed in an underpressure yarn storage device in from of a yarn winding device. The reverse motion of the yarn to the guide channel is performed by reverse motion of a yarn drawing-off mechanism at the workstation. A workstation configured to perform the method is encompassed by the invention as well.

A method for preparing of a workstation of an air-jet spinning machine for the resumption of a yarn spinning process after an interruption includes inserting the yarn end into an inlet opening of the spinning nozzle and transporting the yarn in a reverse motion with aid of the spinning nozzle and a fiber feeding device to a guide channel disposed before the spinning nozzle. A spinning-in yarn end is formed on the yarn in the guide channel. A yarn reserve is formed in an underpressure yarn storage device in from of a yarn winding device. The reverse motion of the yarn to the guide channel is performed by reverse motion of a yarn drawing-off mechanism at the workstation. A workstation configured to perform the method is encompassed by the invention as well.

Fibers, yarns, woven fabric including the yarns and fibers, and methods of manufacturing the same are disclosed. Fibers can include base material staple fibers and dissolvable or water-soluble fibers that are mixed together to define an ultra-homogenous yarn comprising base material and dissolvable material, which is provided in at least the warp direction to form a woven fabric having a 7-end, 8-end or 10-end sateen weave. A processing step provides for the removal of the dissolvable fibers to produce a yarn defining a plurality of pores that are uniformly distributed throughout the structure of the yarn. The woven fabric has a thread count between 450-1200. The woven fabric is thermally-insulative, breathable and moisture-wicking.