Textiles: manufacturing – Textile product fabrication or treatment – Fiber entangling and interlocking
Patent
1998-05-01
2000-01-11
Neas, Michael A.
Textiles: manufacturing
Textile product fabrication or treatment
Fiber entangling and interlocking
28247, B32B 506
Patent
active
060122056
DESCRIPTION:
BRIEF SUMMARY
SUBJECT OF THE INVENTION
The present invention relates to an improved method for the manufacture of textile products directly from fibres and/or from filaments.
The invention also relates to a device for carrying out the method.
SUMMARY OF THE PRIOR ART
The present invention relates essentially to the production of products obtained by the technique which is known as "verticalization technique" and which has been refined by one of the Applicants.
This technique is described in the European patent EP-A-0,479,880 and makes it possible specifically to produce floor and/or wall coverings of the moquette type directly from fibres and/or from filaments travelling in the form of a web.
The technique described involves subjecting the fibres and/or filaments to "transverse looping" accompanied by "drawing" and obtaining an accumulation of the 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 and arranged on a transverse axis with respect to the feed of the web and between which looping fingers are arranged. In this way, each fibre or filament is, in principle, involved in at least one looping, so as to form a twistless yarn obtained by the accumulation of the various exactly parallelized elementary fibres and/or filaments.
The conditions which had been established at the time when the abovementioned patent application was filed seemed to be twofold: the individual fibres and/or filaments, were to have an angle of orientation with respect to the feed direction of the web which was between 5 and 45 degrees and, more specifically, between 15 and 25 degrees; have a low weight per unit area, preferably between 10 and 50 g/m.sup.2.
The condition relating to the orientation which the fibres and/or filaments must have with respect to the feed direction is a minimum condition of profitability where the lower angle is concerned. In fact, below a particular angle, the fibres and/or filaments risk no longer being parallelized correctly during the production of the pseudo-yarn, thus impairing the efficiency of the product. By contrast, where the maximum angle is concerned, this is an angle which constitutes a compromise between theory and practice, that is to say, in the event that fibres and/or filaments have an angle higher than this limit of 45 degrees, it is considered that, in theory, the method could still be carried out, but it is seen that the fibres and/or filaments would generate forces which increase exponentially with the angle of orientation of the fibres for the device formed by the interpenetration of the looping discs with the looping fingers, thus necessitating an oversizing of the parts and, in particular, of the shaft supporting the looping discs.
At the time when the prototype implementing the method described in this patent was being produced, the Applicant had therefore proposed satisfying the first of the conditions by ensuring an orientation of the fibres relative to the feed direction by means of "transverse pre-drawing" which was essentially carried out by the interpenetration of the two sets of discs arranged upstream of the looping-disc/looping-finger device.
Nevertheless, in the production of a machine having a width of, for example, 4 m, such a technical solution proved difficult to put into practice for the following reasons: speed (formation of folds, . . . ) under satisfactory conditions of productivity, particular, fibres having a length greater than 250 mm or continuous filaments.
A solution to this specific problem was proposed by the second Applicant. He proposes using a method which is described in the document EP-A-0,520,911, where a lap comprising a plurality of folds is produced from an entry web of fibres and/or filaments, which comes directly from a card, by passing the said web through a stret
REFERENCES:
patent: 5239734 (1993-08-01), Bathelier et al.
patent: 5476703 (1995-12-01), Wattel et al.
patent: 5867880 (1999-02-01), Bathelier et al.
Bathelier Xavier
Genevray Henri
Cie and Sommer Revetements France S. A.
N.S.C. N.Schlumberger
Neas Michael A.
Welch Gary L.
LandOfFree
Method and device for making textile products does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for making textile products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for making textile products will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1453266