Process and device for piecing to an open-end friction spinning device
AssigneeSchubert & Salzer
InventorsKurt Lovas, Werner Billner
Life of this patent
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Abstract
In order to piece to an open-end friction spinning device with two friction spinning elements driven in the same direction and forming a nip subjected to suction, fibers fed into such nip are twisted into a fiber bundle. The fiber bundle is partially conveyed out of the nip in a longitudinal direction, grasped there, and then transferred to a winding device. An auxiliary conveying device is provided to convey the fiber bundle from a thread forming zone adjacent the spinning element nip up to the draw-off side end of such friction spinning elements. A grabber is provided to grasp the fiber bundle as it leaves such nip of the friction spinning elements and to transfer the forming thread to a draw-off device.
Claims39
Process for piecing to an open-end friction spinning device having two friction spinning elements driven in the same direction and forming a nip, with fibers being fed into a thread forming zone of such nip and subsequently drawn off from such thread forming zone in the form of a continuous thread, said process including feeding fibers into the nip to be twisted into a fiber bundle, grasping such fiber bundle and securing one end thereof against rotation so that the remainder of the bundle is twisted with fibers entering said nip incorporated thereinto, withdrawing said fiber bundle from said thread forming zone with the thread end which is secured against rotation forming the leading end of said thread, while simultaneously twisting-in fibers in the remainder thereof to form a thread which is withdrawn and transferred to a winding device.
A device for piecing on an open-end friction spinning machine including a pair of friction spinning elements defining a spinning nip therebetween for forming thread from fibers fed thereinto, to be drawn off by draw-off rollers and wound onto a bobbin, said apparatus comprising:
- an auxiliary conveying mechanism for controllably at least partially displacing a fiber bundle residing in the machine spinning nip from such nip, at a time when thread is not being drawn therefrom and wound onto a bobbin;
- and
- a grabber for seizing a leading end of the fiber bundle after having left the nip, so that the remaining length of said fiber bundle is twisted for the incorporation thereinto of fibers fed into said spinning nip for the formation of thread.
A method of piecing on an open-end friction spinning machine, such machine including a pair of friction spinning elements defining a nip therebetween for forming thread therein to be drawn off and wound onto a bobbin, said method including the steps of:
- forming a fiber bundle in such nip;
- securing against rotation one end of such fiber bundle so that true twisting is produced in the remaining length thereof for the incorporation thereinto of fibers fed into such nip;
- drawing off said fiber bundle from said nip in a direction towards said one end thereof, therby forming thread as fibers fed into such nip are tied into such bundle;
- and
- winding same onto a bobbin so that newly formed thread follows said fiber bundle to be wound onto such bobbin, without requiring a piecing thread to be returned from the bobbin or otherwise produced.
A device for piecing on an open-end friction spinning machine including a pair of friction spinning elements defining a spinning nip therebetween for forming thread from fibers fed thereinto, to be drawn off by draw-off rollers and wound onto a bobin, said apparatus comprising:
- an auxiliary conveying mechanism for controllably at least partially displacing a fiber bundle residing in the machine spinning nip from such nip;
- and
- a grabber associated with said auxiliary conveying mechanism for seizing a fiber bundle displaced thereby from the nip;
- further wherein
- said auxiliary conveying mechanism is movable, between a first position relatively adjacent the spinning nip and a second position relatively adjacent a bobbin, with said grabber received thereon for movement therewith, so that piecing of a fiber bundle to such bobbin with newly formed thread tied into such fiber bundle can be selectively accomplished without requiring a piecing thread to be returned from such bobbin.
An open-end spinning machine for piecing thread newly produced thereby to one of a bobbin and draw-off rollers, said machine comprising:
- a pair of friction spinning elements forming a spinning station, said elements being rotatably driven in the same direction and defining a spinning nip therebetween for forming thread in a thread forming zone thereof;
- fiber feeding means for controllably feeding fibers to said spinning nip to be formed into thread;
- draw-off rollers for drawing off thread formed in said nip and directing same to a rotatable bobbin to be wound thereon;
- bobbin drive means for controllably rotating such bobbin;
- auxiliary conveying means for controllably at least partially conveying a fiber bundle from said thread forming zone, said auxiliary conveying means being controllably movable between a grasping position relatively adjacent said spinning nip and a transfer position selectively relatively adjacent one of such bobbin and said draw-off rollers;
- and
- grabber means, supported on said auxiliary conveying means for movement therewith, for controllably grasping and subsequently releasing a fiber bundle conveyed from said nip, whenever said auxiliary conveying means is in said grasping and said transfer positions, respectively;
- wherein
- a fiber bundle with newly formed thread tied thereinto is directly conveyed, grasped, and transferred to one of such bobbin and said draw-off rollers, without requiring formation of a separate piecing thread or withdrawal of a piecing reserve from such bobbin.
Apparatus for piecing on an open-end friction spinning machine including a pair of friction spinning elements defining a spinning nip therebetween for forming thread from fibers fed thereinto, to be drawn off by draw-off rollers and wound onto a bobbin, said apparatus comprising:
- a grabber for seizing a fiber bundle residing in the machine spinning nip;
- means for imparting a movement to said grabber to withdraw said fiber bundle at least partially out of said nip;
- draw-off means for drawing off the thread which is formed as a continuation of said fiber bundle;
- and
- means for transferring said newly formed thread to said bobbin for being wound thereon.
Dependencies are inferred from the claim text.