Verfahren zum vertikalen Spulen von Garn

• Main Authors: ANDREW KEY,KENNETH, KEITH DUNNELL,ALAN, WILLIAMS HOOPER,CLIVE, CHISHOLM BISSET,DOUGLAS
• Format: Patent
• Language: German
• Published: 30.11.1968
• Edition: 1
• Subjects: NATURAL OR ARTIFICIAL THREADS OR FIBRES; SPINNING; SPINNING OR TWISTING; TEXTILES

1,198,057. Spindle drive. IMPERIAL CHEMICAL INDUSTRIES Ltd. 14 Aug., 1967 [1 Sept., 1966], No. 39114/66. Heading D1D. In over-end winding of yarn using a rotating spindle and traverse, the speed of rotation of the spindle is varied cyclically about selected values thereof during the winding of the package, or about such a value maintained constant throughout winding, and the frequency of the cyclical variation is measured and, if necessary, varied directly in relation to the traversing frequency so that cyclic variation frequency: traversing frequency is never one consisting of whole numbers less than 5 such as would of itself lead to patterning occurring. The ratio may be maintained constant or varied during winding. The traverse may oscillate at a constant rate. The amplitude of the cyclical variation may be 3-15% of the instant mean spindle speed and it can be varied according to a programme, using a computer, the mean spindle speed may be gradually reduced during the whole of the winding period. The method of the invention may be combined with more radical programming of spindle speed and controlled or random variation in ring speed or yarn delivery speed. In the Examples the cyclical frequency is 5 and 10% of the instant mean speed which is reduced from 9,750 to 7,350 r.p.m. and the ratio is maintained constant at 3.25 and 7.1. Specifications 1,198,056 and 1,198,058 are referred to.