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| Drop-out detecting system for video recording magnetic tape |
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Yarn winding apparatus and method
| Details |
Inventors: Behrens, Reinhard; Busch, Hans-Jochen; Gerhartz, Siegmar; Lenk, Erich; Westrich, Hermann;
Assignee: Barmag A.G. (Remscheid, DE)
Primary Examiner: Gilreath; Stanley N.
Assistant Examiner:
Attorney, Agent or Firm: Bell, Seltzer, Park & Gibson
A winding apparatus is disclosed which includes a rotatable revolver having a pair of spindles mounted thereon, with the spindles being adapted to coaxially mount one or more bobbin tubes. Upon rotation of the revolver, the spindles are moved between a winding position and a doffing position, and a traversing mechanism is provided for traversing an advancing yarn and so as to form a cross wound package on the tubes at the winding position. Also, a contact roll is mounted between the traversing mechanism and the winding position so as to be adapted to rest upon the surface of the package being formed. The contact roll is movable a limited distance radially away from the package being wound, and its position is sensed. To accommodate the build of the package, the revolver is positively rotated in response to the sensed position of the contact roll and so that the distance between the axes of the contact roll and the operating spindle is increased and the pressure between the contact roll and the package may be maintained within a small range of variation. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The winding apparatuses, which are illustrated in FIGS.
1-4, 5, 6 and 7 differ from each other only in details.
Consequently, the following description refers to all embodiments.
Reference will be made to the different details as they arise.
The winding apparatus comprises a revolver 18 which is rotatably mounted to the frame of the winding apparatus, and the revolver rotatably mounts two spindles 5.
1 and 5.
2 which extend along parallel axes.
Each spindle is adapted to mount at least one bobbin tube 10.
1 and 10.
2 respectively.
Also, the revolver 18 is rotatable by a drive motor 33 such that each spindle and associated bobbin tube may be selectively moved between a winding position and a idle or doffing position upon rotation of the revolver.
In FIG.
1, the spindle 5.
1 and tube 10.
1 are in the winding position, and the spindle 5.
2 is in the doffing position.
A feed system 17 continually advances a yarn 3 at a constant speed to the illustrated winding apparatus.
The yarn is first guided through a yarn guide 1 which forms the apex of a traversing triangle.
Then, as it moves in direction 2, the yarn reaches a traversing mechanism 4, which is described in more detail below.
Downstream of the traversing mechanism, the yarn is deflected about a contact roll 11 by more than 90.
degree.
, and then it is wound on a package 6.
The package 6 is formed on a bobbin tube 10.
1, which is placed on the freely rotatable spindle 5.
1.
The winding spindle 5.
1 with the bobbin tube 10.
1 placed thereon and the package to be formed on the latter, are shown at the beginning of the winding operating in FIG.
1.
At this time, the other winding spindle 5.
2 is idle.
Both winding spindles 5.
1 and 5.
2 are freely rotatably supported in the rotatable revolver 18.
In all embodiments, the spindles 5.
1 and 5.
2 are driven by synchronous motors 29.
1 and 29.
2, which are each mounted on the revolver 18 in alignment with the spindles.
Frequency transmitters 30.
1 and 30.
2 supply the synchronous motors with a three-phase current of a controllable frequency
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