US 4,068,502 AGranted

Apparatus for multicolor dyeing of textile yarns

OwnerHarald Andersoninventor

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Abstract

Method and apparatus for the high speed, multicolor dyeing of yarns to obtain uniformly dyed lengths of different color along the length of the yarns, wherein a moving strand is collected in a plurality of layers on the surface of a winding drum while a plurality of streams of dye of different color are continuously applied in metered amounts onto the outer surface of the yarn on the drum to form radial bands of color in the collected yarn. The drum is rotated at high speed to cause radial outward flow of dye from inner yarn windings into the outer yarn windings on the drum, thereby providing uniform penetration and coloration of the yarn by the dyes. Dye centrifugally expelled from the outer surface of the yarn is collected and removed by an outer housing peripherally surrounding the drum. The traverse speed of the yarn traverse mechanism of the drum is independently variable to permit the dyeing of yarn sections of selectively variable lengths.

Claims8

Dependent claims

Improved apparatus for the high speed, multicolor dyeing of a yarn strand comprising:

a. a rotatable drum having end flanges and a central barrel portion for collecting a running length of yarn in a plurality of layers thereon;
b. means positioned in outwardly spaced relation from the surface of the barrel and extending along the barrel length between said end flanges for continuously directing a row of discrete, cohesive streams of dye against the outer surface of the yarn on said barrel to form narrow adjacent radial bands of color in the yarn layers during rotation of the drum;
c. means for guiding a yarn strand onto the barrel surface while traversing the strand along the length of the barrel between said end flanges to sequentially locate desired lengths of the yarn strand in each of said radial bands of color during rotation of the drum;
d. means for rotating the drum at a predetermined high rate of speed to produce centrifugal force sufficient to cause radial outward flow of dye from inner layers of the yarn in each of said bands of color to penetrate the inner surfaces of outer yarn layers on the barrel;
and
e. shield means completely surrounding the outer yarn receiving surface of the barrel in spaced relation therefrom for continuously collecting excess dye centrifugally expelled from the surface of the yarn on the drum during winding and having a yarn entrance slot located therein.

3 more elements

Dependencies are inferred from the claim text.