Apparatus for removing yarn remnants

• US 5,341,549 A
• Filed: 09/23/1992
• Issued: 08/30/1994
• Est. Priority Date: 09/23/1991
• Status: Expired due to Fees

• Current Assignee: W. Schlafhorst AG & Co. (OC Oerlikon Corporation AG)
• Original Assignee: W. Schlafhorst AG & Co. (OC Oerlikon Corporation AG)
• Inventors: Grecksch, Hans, Irmen, Wolfgang, Wirtz, Ulrich, Hensen, Helmuth, Bohmer, Walter
• Primary Examiner(s): Crowder, Clifford D.
• Assistant Examiner(s): MOHANTY, BIBHU R
• Application Number:
  US07/949,684
• Time in Patent Office: 706 Days
• Field of Search: 28/298, 28/297, 28/295, 28/296, 28/292, 28/293, 28/294, 139/244
• US Class Current: 28/298
• CPC Class Codes: B65H 2701/31 Textiles threads or artificial strands of filaments
• CPC Class Codes: B65H 73/00 Stripping waste material from cores or formers, e.g. to permit their re-use

Abstract

An apparatus for removing yarn remnants from a cop tube, especially a cop tube located a caddy, includes a device for removing yarn remnants from the cop tube. An elastically deformable energy storing device is disposed in the vicinity of the bottom of the cop tube. A holder for the yarn remnant removing device is movable along the cop tube and toward the energy storing device for storing potential energy.

Claims

1. An apparatus for removing yarn remnants from a cop tube, comprising:

means for removing yarn remnants from a cop tube;

elastically deformable energy storing means disposed in the vicinity of the bottom of the cop tube; and

a holder for said yarn remnant removing means, said yarn remnant removing means being disposed on said holder and, means for moving said yarn remnant removing means together with said holder along the cop tube into engagement with said energy storing means for storing potential energy.

2. The apparatus according to claim 1, including a caddy on which the cop tube is disposed.

3. The apparatus according to claim 1, including longitudinal guides guiding said holder, and at least one bidirectionally drivable traction means from which said holder is suspended.

4. The apparatus according to claim 1, wherein said yarn remnant removing means include at least three stripper elements for stripping off over the tip of the cop tube.

5. The apparatus according to claim 4, including springs connected to said stripper elements, said stripper elements being concentrically disposed on said holder and pivotable outward counter to the force of said springs.

6. The apparatus according to claim 5, including a common coupler for actuating said stripper elements, and an actuation device for said coupler for actuating said stripper elements at arbitrary vertical positions of said holder including a control element extending over an entire stroke path of said holder.

7. The apparatus according to claim 6, wherein said control element is a control rail extending parallel to the longitudinal axis of the cop tube, and including parallel steering arms for moving said control rail parallel to the longitudinal axis of the cop tube, and means for placing said control rail in continuous contact with said common coupler along a stroke path of said carriage.

8. The apparatus according to claim 7, wherein said springs act upon said stripper elements to force said common coupler to come to a stop against said control rail.

9. The apparatus according to claim 1, wherein said energy storing means are compression springs.

10. The apparatus according to claim 3, wherein said traction means are a chain.

11. The apparatus according to claim 3, including a drive for said traction means having a self-locking worm drive.

12. The apparatus according to claim 11, wherein said drive has a pole wheel, an incremental counter, and a calibration marking for said incremental counter being disposed along a stroke path of said holder, for exact and arbitrary positioning.

13. The apparatus according to claim 1, including a centering and holding mandrel for centering and holding the cop tube, and a suction housing in which said centering and holding mandrel is longitudinally displaceably disposed.

14. The apparatus according to claim 13, including means for locking said centering and holding mandrel in a lowermost position in which said centering and holding mandrel centers the cop tube.

15. The apparatus according to claim 13, including a ram connected to said centering and holding mandrel, and elastically deformable energy storing means toward which said ram is movable for storing potential energy.

16. The apparatus according to claim 13, including actuating means being disposed on said holder and being operative upon upward motion of said holder for releasing said locking means for said centering and holding mandrel.

17. The apparatus according to claim 13, including a closable suction connection for said suction housing.

18. The apparatus according to claim 13, including a suction path leading away from said suction housing, and a pair of strand-cutting scissors disposed in said suction path for severing a yarn strand not completely severed from the cop tube.

19. The apparatus according to claim 4, including means for placing said stripper elements against the cop tube in the vicinity of a tip of the cop tube for pre-centering the cop tube.

20. The apparatus according to claim 19, wherein said yarn remnant removing means include at least three stripper elements for stripping off over the tip of the cop tube, and said means for placing said stripper elements against the cop tube trigger the pre-centering of the cop tube before said centering and holding mandrel reaches the tip of the cop tube.

21. The apparatus according to claim 1, including means for repeating a stroke of said holder in the vicinity of a yarn remnant lap.

22. The apparatus according to claim 13, including stripper means disposed in said suction housing for stripping off a yarn strand from said centering and holding mandrel.