Textiles: spinning – twisting – and twining – Apparatus and processes – With drafting
Reexamination Certificate
2000-10-17
2003-03-25
Calvert, John J. (Department: 3765)
Textiles: spinning, twisting, and twining
Apparatus and processes
With drafting
C057S006000
Reexamination Certificate
active
06536200
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a method of making composite textured multi-filament yarn. It particularly relates to a textured composite yarn comprising at least two texturized feed yarns having at least two colors or color dyeabilities, all referred to herein as colors, wherein the composite yarn has alternating lengthwise sections exhibiting a major color difference from section to section in either the red, green or blue primary colors, as measured by spectral analysis of immediately adjacent lengths of the composite yarn.
The invention further relates to a composite textured multi-filament yarn wherein the yarn is wrapped by a wrapper yarn so that the multiple filaments are substantially squeezed together along their lengths, forming adjacent sections of filaments per meter of about five or more, measured along the composite yarn length.
A novel composite yarn is produced from two or more pre-colored or pigmented continuous filament textured multi-filament yarns, substantially helically wrapped by one or more wrapper yarns. The novel composite yarn is distinguished in appearance by displaying to the observer a sharply repeating color change along the length of the yarn. It demonstrates a more visually distinctive change of color over a greater composite yarn length than has heretofore been obtained in a composite multi-ply yarn assembled from a plurality of single continuously colored textured yarns.
Textured continuous filament manmade yarns can be single colored yarns or multi-color yarns. Multi-color textured continuous filament yarns are usually produced by either space-dyeing a single textured yarn by applying dyes of different colors along the length of the yarn, or by combining single color dyed or pigmented textured yarns.
Wrapped composite yarns made by wrapping separate, discreet, or individual textured color yarns are limited in their ability to significantly alter the color of the composite yarn over any meaningful length of the yarn product, as can be done by space-dyeing. Such yarns are characterized by relatively short lengthwise changes of color, as it has not heretofore been possible to change color for any significant length, from one or more of the constituent colors still present in the composite yarn. Therefore, the visual effect of existing multi-color yarns made from separate colored yarns has been to have all of the constituent colors more or less present or visible on the surface of the yarn over limited lengthwise distances of only a maximum of about two inches or so.
SUMMARY OF THE INVENTION
In this invention a composite textured wrapped yarn is provided consisting of two or more pre-colored individual textured yarns, where the overall color appearance of the composite yarn changes its color in repeating cycles along its length by a large and easily detectable percentage in the red, green or blue part of the spectrum. The color change is much more than has heretofore been produced with a blend of pre-colored textured continuous filament constituent yarns. The composite novel yarn of this invention more closely resembles traditional “space-dyed” textured filament yarns where adjacent lengths of the finished yarn can exhibit longer and larger color changes, because there the color changes are achieved by applying various dyes locally to the yarn at selected places along its length. This invention now avoids the expense and complications of the space-dyeing process.
This invention creates a wrapped yarn of more contrasting lengthwise color changes. According to this invention, at least two feed yarns are provided. They are made of pre-colored textured continuous filaments, and according to this invention by alternately or selectively moving to the yarn surface one or more colored yarn input components, while submerging another colored yarn input component, and periodically reversing these surface and submerged positions, as schematically shown in FIG.
1
. This is done by:
(1) surfacing one textured yarn to the visible circumferential surface of a subsequently wrapped composite yarn while mostly submerging within the composite bundle the accompanying textured yarn having one or more contrasting colors;
(2) then reversing the process and surfacing the mostly submerged interior yarn to the visible circumferential surface of the subsequently wrapped yarn while mostly submerging within the interior of the composite yarn the formerly visible exterior yarn, and continuing to alternate the surfacing and submerging reversals indefinitely while squeezing both of the colored textured yarns together by the wrapping process. A heather-like transition zone of nearly equal amounts of each color is created at those locations along the length of the resulting composite yarn as the colored yarns exchange places between submerged and surface locations inside or on the wrapped composite yarn product. Each such transition zone appears as a gradually changing blend of the two colors as they exchange interior and exterior places, switching from a more submerged position to a more visible position on the wrapped composite yarn circumference, or vice versa.
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Calvert John J.
Hurley Shaun R
Schnader Harrison Segal & Lewis LLP
Textured Yarn Co., Inc.
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