Preparing textile fibres for testing
AssigneeTechnology Finance Corporation
InventorsEtienne Weideman, Jaromir Cizek
Life of this patent
Estimating the term…
Abstract
Yarn is unwound from a reel by means of unwinding rollers. Simultaneously the yarn is untwisted partially to free constituent fibers by means of a rotating arm guiding the yarn through an eye. Nip rollers prevent slack in the untwisted yarn. Drafting rollers draft the untwisted yarn to break bonding among the fibers. A pair of endless belts moving in opposing relation hold the drafted fibers together in a bundle. The fibers are sucked from the bundle via a conduit into a foraminous container from which the fibers can individually be reclaimed for testing.
Claims40
A method of obtaining fibres from a yarn for testing, including mechanically untwisting the yarn to a degree of 100%+30%, drafting said untwisted yarn to break remaining bonding between fibres which have formed the yarn, said drafting being at least partially between two pairs of nip rollers operating in series, a downstream pair of the nip rollers having a peripheral speed faster than a peripheral speed of an upstream pair of the nip rollers, mechanically separating said fibres, and gathering said fibres.
A method as claimed in claim 9 in which separating and gathering the fibres are by transporting them by means of air movement into a foraminous container.
A yarn dismantling apparatus including
- mechanical untwisting means operable to untwist yarn formed of fibres;
- and
- separating means and gathering means for separating and gathering the fibres.
A yarn dismantling apparatus including
- a rotational support for rotatably supporting a reel holding yarn;
- an unwinding device including a pair of unwinding nip rollers downstream of said rotational support, the unwinding nip rollers being rotatable such that a tangential speed thereof corresponds with a selective rate of unwinding the yarn from the reel;
- an untwisting device for untwisting the yarn to a predetermined degree while the yarn is being unwound from the reel;
- a drafting device downstream of the untwisting device, the drafting device including a pair of driven drafting nip rollers downstream of the unwinding nip rollers;
- a drive drivingly connected to the drafting nip rollers to drive the drafting nip rollers at a tangential speed faster than that of the unwinding nip rollers to cause corresponding drafting to an appropriate degree to break any remaining bonding among the fibres.
In a yarn dismantling apparatus for providing at a predetermined rate a yarn of fibres untwisted to a predetermined degree, the improvements comprising:
- a first pair of nip rollers for receiving and passing therebetween the untwisted yarn, the first pair of nip rollers rotating at a first tangential speed;
- and
- a second pair of nip rollers receiving and passing therebetween the untwisted yarn passed by the first pair of nip rollers, the second pair of nip rollers rotating at a second tangential speed that is faster than the first tangential speed, whereby to break bonds among the fibres of the yarn.
Dependencies are inferred from the claim text.