Method of removing impurities and similar matter from staple fibres in ringless spinning and device for performing said method

Claim 2

In a method of ringless spinning, the steps of advancing impurities-containing unopened fibers in a path leading to a spinning chamber; opening said fibers during advancement of the same so that impurities are liberated from them; continuously discharging the liberated inpurities from said path into a withdrawing space which is in open communication with said path; and continuously withdrawing the discharged impurities from said withdrawing space by suction.

Claim 4

A method as defined in claim 2, wherein the step of opening said fibers comprises subjecting the fibers to the combing-out action of a carding roller.

Claim 5

In an apparatus for ringless spinning of fibers, a combination comprising fiber passage means for advancement of fibers towards a spinning chamber; supply means for supplying unopened fibers into said fiber passage means; fiber opening means for opening said fibers during advancement thereof in said fiber passage means towards said spinning chamber; impurities discharge passage means communicating with said fiber passage means for continuous discharge of impurities which are liberated from the opened fibers; and suction means in open communication with said impurities discharge passage means for continuous withdrawal from the same of discharged impurities.

Claim 6

In an apparatus for ringless spinning of fibers, a combination comprising fiber passage means for advancement of fibers towards a spinning chamber; supply means for supplying unopened fibers into said fiber passage means; fiber opening means for opening said fibers during advancement thereof in said fiber passage means towards said spinning chamber; impurities discharge passage means communicating with said fiber passage means for continuous discharge of impurities which are liberated from the opened fibers; and suction means in open communication with said impurities discharge passage means for continuous withdrawal from the same of discharged impurities.

Claim 7

A combination as defined in claim 4; further comprising a hollow body having said passage means formed therein; and wherein said fiber opening means comprises a fiber opening roller rotatable in said hollow body.

Claim 8

A combination as defined in claim 5, wherein said fiber passage means comprises a first passage portion extending downstream from said supply means for advancement of unopened fibers, and a second passage portion extending from said first passage portion towards said spinning chamber for advancement of opened fibers; and wherein said impurities discharge passage means communicates with said fiber passage means between said passage portions of the same.

Claim 9

A combination as defined in claim 6, wherein said impurities discharge passage means has an inlet which communicates with said fiber passage means at least substantially tangentially with reference to said fiber opening roller.

Claim 10

A combination as defined in claim 7; and further comprising tangentially oriented guide baffles mounted in said inlet.

Claim 11

A combination as defined in claim 5, wherein said impurities discharge passage means has an inlet which communicates with said fiber passage means; and further comprising guide baffles mounted in said inlet and oriented substantially tangentially with reference to said fiber opening roller. .Iadd. 10. In an apparatus for ringless spinning of fibers, a combination comprising fiber passage means for advancement of fibers towards a spinning chamber; supply means for supplying unopened fibers into said fiber passage means; a fiber opening roller for opening said fibers during advancement thereof in said fiber passage means towards said spinning chamber; impurities discharge passage means communicating with said fiber opening roller for continuous discharge of impurities which are liberated from the opened fibers; and means in open communication with said impurities discharge passage means for receiving from the same the discharged impurities, said impurities discharge passage means having an inlet which communicates with said fiber passage means at least substantially tangentially with reference to said fiber opening roller. .Iaddend. .Iadd. 11. In an apparatus for ringless spinning of fibers, a combination comprising fiber passage means for advancement of fibers towards a spinning chamber; supply means for supplying unopened fibers into said fiber passage means; a fiber opening roller for opening said fibers during advancement thereof in said fiber passage means towards said spinning chamber; impurities discharge passage means communicating with said fiber opening roller for continuous discharge of impurities which are liberated from the opened fibers; and means in open communication with said impurities discharge passage means for receiving and removing from the same the discharged impurities, said discharge passage means having an inlet which communicates with said fiber opening roller and which has guide means that are substantially tangentially oriented with reference to said fiber opening roller. .Iaddend. .Iadd. 12. A combination as claimed in claim 11, wherein said means in open communication with said impurities discharge passage means are operatively connected to a central suction device. .Iaddend. .Iadd. 13. In an apparatus for ringless spinning of fibers, a combination comprising supply passage means for supplying a stream of air and opened fibers to a spinning chamber; fiber passage means extending to and communicating with said supply passage means for advancing fibers to the same; supply means for supplying unopened fibers into said fiber passage means; a fiber opening roller for opening said fibers during advancement thereof in said fiber passage means towards said supply passage means; impurities discharge passage means for discharge of impurities which are liberated from the opened fibers, said impurities discharge passage means communicating with said fiber passage means closely downstream of the region where said fiber opening roller exerts its maximum opening effect upon the unopened fibers but ahead of said supply passage means so that the impurities discharge has no effect upon the flow of said stream in said supply passage means; and means communicating with said impurities discharge passage means for receiving the discharged impurities from the same. .Iaddend. .Iadd. 14. A combination as defined in claim 13, wherein said supply passage means extends tangentially of said fiber opening roller and the opened fibers which are freed of said impurities travel with said fiber opening roller from said impurities discharge passage means to said supply passage means and are discharged into the stream of air flowing therein. .Iaddend. .Iadd. 15. In a method of ringless spinning, the steps of guiding in a first path a stream of air which flows towards a spinning chamber; advancing impurities-containing unopened fibers in a second path which discharges into said first path; opening said fibers during advancement of the same in said second path so that impurities are liberated from the fibers; discharging the liberated impurities from said second path ahead of said first path so that the discharge has no effect upon the air stream in said first path; withdrawing the discharged impurities; and discharging the opened fibers from said second path into said first path downstream of the location where said impurities are discharged. .Iaddend. .Iadd. 16. A method as defined in claim 15, wherein said step of opening said fibers is carried out with a rotating fiber opening roller; and wherein said stream of air in said first path flows tangentially of the periphery of said fiber opening roller and entrains the opened fibers travelling on said periphery. .Iaddend. .Iadd. 17. In an apparatus for ringless spinning of fibers, a combination comprising supply passage means for supplying a stream of air and opened fibers to a spinning chamber; fiber passage means extending to and communicating with said supply passage means for advancing fibers to the same; supply means for supplying unopened fibers into an inlet of said fiber passage means; a fiber opening roller for opening said fibers during advancement thereof in said fiber passage means towards said supply passage means, said supply passage means being arranged to pass said stream of air by said fiber opening roller; impurities discharge passage means for discharge of impurities which are liberated from the opened fibers, said impurities discharge passage means communicating with said fiber passage means intermediate said inlet and said supply passage means so that said opened fibers enter said stream of air passing by said fiber opening roller in said supply passage means only after discharge of the impurities from said opened fibers; and means communicating with said impurities discharge passage means for receiving the discharge impurities from the same. .Iaddend. .Iadd. 18. A combination as defined in claim 17, said fiber passage means having a fiber opening zone extending from said inlet to said impurities discharge passage means, and a purified-fiber travel zone extending from said impurities discharge passage means to said supply passage means and having an outlet communicating with the latter. .Iaddend..Iadd. 19. A combination as defined in claim 18, said impurities discharge passage means including an inlet opening which communicates with said fiber passage means intermediate said zones thereof; and wherein said supply passage means has an air intake remote from said inlet opening for aspiration of said stream of air so that the stream sweeps over said outlet to entrain the purified opened fibers and convey them to said spinning chamber. .Iaddend. .Iadd. 20. A combination as defined in claim 17, wherein said impurities discharge passage means includes an inlet opening communicating with said fiber passage means; and further comprising at least one guiding wall in said inlet opening and extending at least approximately tangentially of said fiber opening roller. .Iaddend. .Iadd. 21. An apparatus for removing impurities from staple fibers for ringless spinning in spinning units, comprising a hollow body, a fiber opening roller rotatable in said hollow body, said hollow body having a supply passage through which unopened fibers are supplied to said opening roller, and a spinning chamber, said hollow body having an opened fiber discharge passage through which opened fibers pass from said opening roller to said spinning chamber, said hollow body having an impurities discharge passage between said fiber supply passage and said opened fiber discharge passage for discharge therethrough of impurities from fiber being opened by said opening roller, said impurities discharge passage extending through the hollow body generally tangentially to the periphery of the fiber opening roller. .Iaddend. .Iadd. 22. An apparatus for removing impurities from staple fibers for ringless spinning in spinning units, comprising a hollow body, a fiber opening roller rotatable in said hollow body, said hollow body having a supply passage through which unopened fibers are supplied to said opening roller, and a spinning chamber, said hollow body having an opened fiber discharge passage through which opened fibers pass from said opening roller to said spinning chamber, and said hollow body having an impurities discharge passage between said fiber supply passage and said opened fiber discharge passage for discharge therethrough of impurities from fiber being opened by said opening roller, said impurities discharge passage extending through the hollow body generally tangentially to the periphery of the fiber opening roller, said hollow body including a wall extending substantially tangentially to the periphery of the fiber opening roller, located so that the adjacent portion of the fiber opening roller periphery moves towards said wall and constituting a wall of the impurities discharge passage. .Iaddend.