Apparatus for cable-twisting two yarns

• US 4,163,357 A
• Filed: 04/25/1978
• Issued: 08/07/1979
• Est. Priority Date: 06/13/1977
• Status: Expired due to Term

• Current Assignee: Palitex Project Company GmbH
• Original Assignee: Hamel GmbH Zwirnmaschinen
• Inventors: Greive, Aloys, Horstmann, Aloys
• Primary Examiner(s): Watkins, Donald
• Application Number:
  US05/899,735
• Time in Patent Office: 469 Days
• Field of Search: 57/3, 57/6, 57/13, 57/14, 57/16, 57/17, 57/18, 57/34 R, 57/58.49, 57/58.52, 57/58.7, 57/58.83, 57/106, 57/58.3, 57/58.36, 57/59, 57/66, 242/130, 242/131, 242/131.1, 242/139
• US Class Current: 57/58.36
• CPC Class Codes: D01H 1/18 Supports for supply packages
• CPC Class Codes: D02G 3/285 one yarn running over the feeding spool of another yarn

Abstract

An apparatus for twisting a first and second yarn having a parallelogrammatic mounting support for a plurality of supplies of one of said yarns mounted above a twisting spindle carrying the other of said yarns and having a radially open aperture, a takeup means mounted above said twisting spindle, and a U-shaped guide for passing said one of said supplies of yarn from the mounting support to said spindle.

Claims

1. An apparatus for twisting together two yarns, said apparatus comprising:

a frame;

a tubular spindle having and rotatable on said frame about an upright spindle axis, said spindle having a support for a supply of one of said yarns and being formed below said support with a radially open aperture;

a rotatable takeup spool above said spindle on said frame said one yarn normally extending up from its supply and being engaged around said takeup spool;

a holder adapted to support a supply of the other of said yarns;

support means for displacement of said holder on said frame between an operating position generally above said takeup spool and said spindle and a loading position below said operating position and next to said spool and spindle;

guide means on said frame including a substantially closed U-shaped guide tube having an upstream end opening upwardly and directed toward said holder and a downstream end opening upwardly toward said spindle for feeding said other yarn from its supply into the lower end of said spindle, thence out through said aperture, and thence up past said supply of said one yarn to said takeup spool;

spindle drive means connected to said spindle for rotating same about said spindle axis and thereby twisting said yarns about each other;

takeup drive means for rotating said takeup spool and thereby winding the twisted yarns upon said takeup spool; and

means for forming a stream of gas in said guide tube from said upstream end to said downstream end for pneumatically entraining and threading a filament therethrough.

2. The apparatus defined in claim 1 wherein said holder is supported on said support means pivotally and moves substantially in an upright plane on pivoting of said holder between said positions.

3. The apparatus defined in claim 2 wherein said support means is a parallelogrammatic linkage including a pair of generally parallel long links having inner ends pivoted at respective inner pivot axes on said frame and an outer transverse link carrying said holder, said long links having outer ends pivoted at respective outer pivot axes on said outer transverse link, said pivot axes all being substantially parallel and perpendicular to said plane.

4. The apparatus defined in claim 3, further comprising biasing means urging said linkage into said operating position.

5. The apparatus defined in claim 4 wherein said biasing means includes at least one spring connected between said frame and one of said links.

6. The apparatus defined in claim 4, further comprising means for latching said linkage releasably in said loading position.

7. The apparatus defined in claim 6 wherein said means for latching includes at least one pawl on one of said links pivotally operatively engageable with another of said links.

8. The apparatus defined in claim 7 wherein said linkage includes pivot pins at said pivot axes, said pawl being engageable over one of said pins and said means for latching further comprising spring means for urging said pawl into a position hookable over said one pin.

9. The apparatus defined in claim 8, further comprising a handle on said pawl operable for displacing same against the force of said spring means and out of said position hookable over said one pin.

10. The apparatus defined in claim 2 wherein said holder has a yarn guide between said supply of said other yarn and said guide means and displaceable substantially in said plane on displacement of said holder between said operating and loading positions.

11. The apparatus defined in claim 10 wherein said holder has a pair of support pins each adapted to carry a respective supply of said other yarn and including to each other, said yarn guide lying generally at the intersection of longitudinal axes of said pins, whereby the tail end of said other yarn of one of said supplies of said other yarn can be connected to the starting end of the other of said supplies of said other yarn.

12. The apparatus defined in claim 11 wherein said holder is generally V-shaped and has a pair of arms each having a respective outer end carrying a respective one of said pins, said pins and arms being generally coplanar and in said plane.

13. The apparatus defined in claim 12 wherein said apparatus has a row of such spindles, takeup spools, holders, and means in and defining a longitudinal direction, said plane being generally perpendicular to said direction and including said spindle axis.

14. The apparatus defined in claim 12 wherein said arms extend at an angle between 100°

and 140°

to each other.

15. The apparatus defined in claim 12, further comprising means for pivoting each of said pins between an inner position on said plane and an outer position offset from said plane.

16. The apparatus defined in claim 1 wherein said spindle is provided at said aperture with a storage drum.

17. The apparatus defined in claim 1 wherein said holder is level with said takeup spool in said loading position.

18. The apparatus defined in claim 1, further comprising an eye above said spindle on said spindle axis, both of said yarns passing through said eye before engaging said takeup spool.

19. The apparatus defined in claim 1 wherein said means for forming said stream of gas is a pneumatic threading pistol.

20. The apparatus defined in claim 1 wherein said means for forming said stream of gas includes an injector-type jet pump in said tube directed toward said downstream end therein.

21. The apparatus defined in claim 20 wherein said means for forming said stream includes a source of gas under pressure and a valve between said source and said jet pump.

22. The apparatus defined in claim 21 wherein said jet pump has an annular chamber surrounding said tube, a restriction in said tube, and at least one passage extending from said chamber toward said restriction and inclined to said tube at said restriction.

23. The apparatus defined in claim 20 wherein said tube has an upstream leg extending upwardly generally parallel to said spindel axis past said spindle, a downstream leg opening upwardly toward said spindle, and a bight portion between and interconnecting said legs.

24. The apparatus defined in claim 20 wherein said frame is provided with a sleeve spacedly surrounding said spindle and said holder of said one yarn and defining therewith a balloon space, said sleeve being provided with a downward deflector extension extending downwardly past said aperture.

25. The apparatus defined in claim 24 wherein said extension is downwardly frustoconical relative to said spindle axis.