Take-up unit for take-up of a synthetic filament yarn onto a cop

Details Take-up unit for take-up of a synthetic filament yarn onto a cop Take-up unit for take-up of a synthetic filament yarn onto a cop

1999-08-10

2000-08-15

Calvert, John J.

Textiles: spinning, twisting, and twining

Apparatus and processes

Receiving twist type

57124, 57156, 57119, 57125, D01H 752

Patent

active

061018023

ABSTRACT:
A take-up unit for take-up of a synthetic filament yarn (1) onto a cop (2), with a rotary drive (3) which carries the cop (2) and which causes the cop (2) to rotate at a speed which can be stipulated, with a balloon thread guide (5) which is located in the axial direction at a considerable distance from the cop (2), with a ring holder (6) which surrounds the cop (2) at a constant radial distance with a race located therein and a ring traveler which runs on the race, with a ring holder drive (9) which carries the ring holder (6) and which moves the ring holder (6) back and forth parallel to the longitudinal axis of the cop (2) between the ends of the latter, take-up of the filament yarn (1) onto the cop (2) taking place according to stipulated cop generation factors and such that the cop (2), at the conclusion of take-up, has a roughly cylindrical middle area of large diameter and end areas with diameters which decrease towards the ends of the cop (2) except for the raw diameter of the latter. The ring traveler on the ring holder (6) can be actively braked by means of a braking means when the rise areas are passed, at least once a predetermined diameter of the middle area has been attained. In this way, overdelivery of the filament yarn (1) in the end areas of the cop (2) can be reliably prevented even at large diameters of the cop (2) or large diameter differenes.

REFERENCES:
patent: 3258904 (1966-07-01), Winterbottom et al.
patent: 4023342 (1977-05-01), Schenkel
patent: 4270340 (1981-06-01), Baucom et al.
patent: 5009063 (1991-04-01), Yamaguchi et al.

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