Tension-regulating rotary unwinder for a double-twist twisting frame
AssigneeSavio Macchine Tessili S.p.A.
InventorsColussi Vittorio, Gardin Giovanni, Badiali Roberto
Life of this patent
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Abstract
A device for regulating and controlling the unwinding tension in a double-twist twisting frame, having a member which is mounted coaxially, in an idle and rotatable manner, on the respective pin of the unwinding packages. The device is provided with elastic yieldable elements which project radially from the pin to engage unwound yarn during the depletion stage of the feed packages.
Claims6
A double-twist twisting frame in which yarns to be twisted together are withdrawn from packages located in a centered manner on vertical hollow pins into which the withdrawn yarns enter at the top and slide downwards through the pins to a twisting station therebelow wherein the yarns are twisted and from which the twisted yarns are passed to a collection bobbin, said frame comprising:
- a tension regulator for packages nearing depletion including a collar device coaxial with each of the pins, wherein each of said collar devices is idly mounted on and rotatable with a pin, and a plurality of elastic closed loop members about and projecting radially from and above said collar device, wherein each of said loop members has a pair of ends secured to said collar device, wherein each of said elastic loop members is yieldable to allow the changing of full and depleted packages to and from the pin upon which said collar device is mounted, and wherein each of said loop members can make contact with and provide tension on the yarn as the yarn is being unwound from a package nearing depletion.
Dependencies are inferred from the claim text.