Textiles: manufacturing – Textile product fabrication or treatment – Fiber entangling and interlocking
Patent
1997-06-18
1999-02-09
Neas, Michael A.
Textiles: manufacturing
Textile product fabrication or treatment
Fiber entangling and interlocking
112 8073, D04H 174
Patent
active
058678808
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATION
This is the national stage of International Application No. PCT/EP95/03871 filed on Sep. 29, 1995.
SUBJECT OF THE INVENTION
The present invention relates to an improved method for producing textile products directly from fibres and/or filaments.
The invention also relates to a device making it possible to implement the method and extends to products resulting from the method and/or obtained by means of the said device.
SUMMARY OF THE PRIOR ART
European Patent EP-A-0,479,880 granted in the Applicant's name proposed a new technique, called "verticalization" technique, for producing textile products and, more particularly, floor and wall coverings of the moquette type directly from fibres and/or filaments travelling in the form of a web. The technique involves subjecting the fibres and/or filaments to transverse looping accompanied by drawing and accumulating these fibres and/or filaments in the form of a pseudo-yarn in which the fibres and/or filaments are parallelized. The pseudo-yarn is a non-twisted wavy yarn.
This document describes that transverse looping accompanied by drawing is carried out for each individual fibre or filament by means of rotary looping elements or discs which are spaced from one another and arranged on a shaft transverse relative to the advance of the web and between which looping fingers are arranged. In principle, each fibre and/or filament is involved in at least one looping, so as to form the pseudo-yarn obtained by the accumulation of exactly parallelized elementary fibres and/or filaments. This accumulation in the form of a pseudo-yarn takes place directly in the eye of the needles according to the various embodiments illustrated in the patent.
The main disadvantage of such an arrangement is that the needles then have to be arranged exactly in the extension of the looping fingers, that is to say between the looping discs. Since the needles are so-called expendable elements, that is to say they have to be replaced regularly on account of their wear, their particular arrangement between the discs makes replacement procedures difficult.
Moreover, this configuration makes the design of the needles somewhat unconventional. In fact, the tolerances and lengths which they must have are unusual and therefore make the production of such needles particularly complicated.
This document also describes additionally that the loops taking the form of a pseudo-yarn can be fixed to one another in various ways and, inter alia, to a support.
A finished product is also described, in which the loops can be organized in the form of rows of stitches, but it does not describe the means for arriving at such a product.
At the present time, the various conventional stitching techniques can be divided essentially into two large groups: on the one hand, techniques known as "tuck stitch" and, on the other hand, techniques known as "sewing/knitting".
In the first large group, mention may be made of knitting machines of the flat type, in which a yarn is dispensed progressively and therefore successively to each of the needles by a device called a "yarn guide".
The needles then slide successively in a fixed section due to the action of a cam which is itself driven together with the thread guide by a carriage impelled in a reciprocating movement over the entire width of the machine.
The same principle of forming a stitched product can be applied to a circular knitting machine, in which the needles are mounted along the generatrices of a cylinder and moved successively in uniform rotation in one direction. This makes it possible, where appropriate, to put in place a plurality of fixed cams and thereby multiply the productivity of the machine. These machines are particularly suitable for the production of "knitted fabric" by the meter, but do not make it possible to produce fully fashioned articles.
Cotton's knitting machines are a final type of machine in the first group. In this type of machine, the yarn is not dispensed directly to the needles, but is progressively
REFERENCES:
patent: 4622253 (1986-11-01), Levy
patent: 4818586 (1989-04-01), Smith et al.
patent: 5239734 (1993-08-01), Bathelier et al.
Bathelier Xavier
Naudin Francois
Neas Michael A.
Sommer S.A.
Worrell Jr. Larry D.
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