Double face warp knit fabric with two-side effect

Details Double face warp knit fabric with two-side effect Double face warp knit fabric with two-side effect

1999-11-12

2001-03-13

Worrell, Danny (Department: 3741)

Textiles: knitting

Fabrics or articles

Warp

C442S304000

Reexamination Certificate

active

06199410

ABSTRACT:

BACKGROUND OF THE INVENTION
A. Field of Invention
This invention pertains to a warp knit fabric having velvet finish on one side with a preselected pattern and a velour finish on the second side, as well as a method for making the same.
B. Description of the Prior Art
A method of making a nappable knit fabric on a double needle bar knitting machine is known in which from five to eight yarn guide bars are used to knit fabrics simultaneously. After knitting, the fabrics are separated by cutting the interconnecting pile yarns. The pile yarns are carried by the middle or inner bars (for example, bars three, four and five on a seven bar arrangement) which tie the front and the back support fabrics together. These are also the yarns which are disposed on the technical face of each fabric and are used to give the fabric a particular characteristic and aesthetic value such as pattern, softness, luster, hand, resiliency, fullness, bulk and warmth. These characteristics are generally achieved by selecting the proper pile yarn for these bars as well as by the movement of the bars.
However, these inner yarns do not contribute to the dimensional stability and strength of the fabric. Physical characteristics are provided in known fabrics by the backing yarns which are normally thinner and less bulky than the pile yarns on the middle bars. Their main purpose is to form the fabric substrate, hold the fabric together, as well as to provide dimensional stability. Therefore, in known fabrics, these yarns are positioned, sized and arranged so that they are substantially invisible.
A disadvantage of this construction, known in the art, is that the technical face of the fabric is not nappable by itself, but only by pulling pile yarn from the technical back with the result that these fabrics have a velour finish on the technical face with the same pattern and composition as the velvet finish on the technical back.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a double knit fabric with a nappable velour finish on one side (the technical face) and a velvet finish, contrasting in color, composition and pattern, on the second side (the technical back).
A further object is to provide a method of making a double sided knit fabric using a multi-bar knitting machine wherein the knit construction is designed, by changing the movements of the end guide bars, to ensure that the fabric has a desired dimensional stability and/or flexibility.
Other objects and advantages of the invention shall become apparent from the following description.
Briefly, a double faced knit fabric is made by first knitting a three-dimensional fabric on a warp knitting machine using a plurality of guide bars. The three-dimensional fabric structure includes two support substrates interconnected by a plurality of pile yarns. Some of the guide bars provide the backing and stitching yarns. Other guide bars provide the pile yarns.
The three-dimensional structure is split into two fabrics, each having a technical face and a technical back. The technical face is napped or otherwise raised to form a velour. The technical back with the pile yarns is brushed to form a velvet.
Importantly, in order to provide a desired pattern of color or shapes on the technical face, different from that on the technical back, either the stitching or the backing yarns are made heavier than in the prior art so that they can be napped and hence provide fibers for the velour. Moreover, the inlay of the backing bars is changed to ensure that the corresponding yarns are nappable.
The resulting fabrics have a velour face which can be colored and patterned differently from the velvet.


REFERENCES:
patent: 5855125 (1999-01-01), Lohmueller et al.

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