Textiles: manufacturing – Textile product fabrication or treatment – Of thread interlaced article or fabric
Patent
1990-07-19
1992-01-21
Schroeder, Werner H.
Textiles: manufacturing
Textile product fabrication or treatment
Of thread interlaced article or fabric
D04H 1100
Patent
active
050817523
DESCRIPTION:
BRIEF SUMMARY
The invention concerns an installation for producing flat textile bodies.
Such flat bodies can be used in many different ways, for example as heat insulating panels, sound insulating panels, reinforcement of plastics, filter panels and especially for the manufacture of pile carpet panels.
In past decades many efforts have been undertaken to improve productivity in the manufacture of pile carpet panels and to simultaneously enhance design possibilities.
In DE-PS 579,482 and GB-PS 472,707 pile carpets are made by gluing individual threads (yarn sheets) on intermediate layers, which carpets however exhibit only low strength as the pile threads are only glued together over a small area without being mechanically connected. In DE-PS 1,071,040 a block is formed by embedding layers of individual threads in a hardening agent, which block is cut into panels. Here as well the strength of the resulting product is too low because of the lack of mechanical bonding.
GB-PS 589,908 describes the manufacture of a pile carpet through the use of strips consisting of cut woven webs. In the middle of the strips are warp threads applied by glue or sewing to a lower stratum. The free floating, cut weft threads to the left and right of the warp threads are bent upwardly as the pile threads and form the visible portion of the carpet whose thickness is determined by the spacing of the strips. Because of the troublesome application of the strips to the lower stratum, this process has not yet been put into practice.
A process is described in DE-PS 830,042 in which unwoven materials, such as yarns, are pressed into bales, cut into slices and then coated or bonded on one of the free surfaces.
In FR-OS 2,044,778 pile carpets are described whose pile consists of the weft yarn of folded woven webs. The woven webs are folded in zigzag fashion to form a block. From this coated layers are successively cut off so that the formerly floating weft threads are bonded with one end by the coating substrate and with their other ends form the surface of the pile carpets. Again, the poor mechanical anchoring of the pile threads leads to a low wear resistance of the carpet.
The problem of anchoring the pile threads is the subject of CH-PS 401,892. Therein the individual pile rows are bonded on both sides to band shaped intermediate layers and are thereby joined pile row by pile row to one another. The result is a very stable assembly and a high quality pile carpet.
The method described in CH-PS 521,114 applies pole material consisting of thread sheets groupwise to and perpendicular to band shaped intermediate layers. The threads are then so cut off that they lie flush with one longitudinal edge of the band and extend beyond the other longitudinal edge of the band. Finished pile carpet panels can be obtained by cutting such panels from blocks consisting of several layers of such fixed pole threads. Disadvantages of this process are the lack of mechanical anchoring of the pole threads and the complicated positioning of the pole threads on the band shaped intermediate layers.
In CH-PS 546,564 a pile carpet as well as a process for its manufacture is described which seeks to overcome the above-described drawbacks. The pile consists in this case of floating weft threads of a woven web whose warp threads are so arranged and the weft threads so interwoven therewith that they later form the basis of the pile carpet. The woven web is wound up in an intermediate step and is then slit in the next step into bands which are so bonded together that the warp threads come to lie upon one another and form the base of the carpet while the floating weft threads form the carpet pile. A substantial disadvantage of the process of CH-PS 546,564 lies in the fact that the woven webs are wound-up in an intermediate step before the bonding and cutting operation. Through storing on wound coils and by following steps of unwinding and cutting, the woven bands are so deformed that a uniform reproducible pattern cannot be achieved in the final carpet. This is further aggravated by sl
REFERENCES:
patent: 1392123 (1921-09-01), Danisi
patent: 1403505 (1922-01-01), Landis
patent: 1411908 (1922-04-01), Cacici
patent: 2080886 (1937-05-01), Fowler
patent: 2443358 (1948-06-01), Michaelis
Verband Der Deutschen, Heimtextilien-Industrie EV pp. A6-A9.
Abe dahr-Dorel, Von der Faser Zum Stoff pp. 102-103.
Alfons Hoffer, Stoffe 2 pp. 62-69.
Dorn Michael
Reinhard Ruedi
Calvert John J.
Schroeder Werner H.
Texilma AG
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