Series shed weaving machine for weaving multiple web panels on a

Details Series shed weaving machine for weaving multiple web panels on a Series shed weaving machine for weaving multiple web panels on a

1997-11-19

1999-05-18

Falik, Andy

Textiles: weaving

Special-type looms

Pushed shed pocket

139101, 1394353, D03D33/00;47/00

Patent

active

059041862

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a method for inserting weft threads in a series shed weaving machine. The invention relates further to a series shed weaving machine for inserting the thread.
A series shed weaving machine for simultaneously inserting a plurality of weft threads into a shed-forming weaving rotor is known from EP 0 433 216 B1. The known roller-shaped weaving rotor is equipped with shed-forming elements which place the warp threads into a high shed position or a low shed position respectively so that a shed results through which a weft thread can be inserted by means of air. A plurality of such sheds is always open at the surface of the weaving rotor so that weft threads can be inserted simultaneously through each open shed.
This known series shed weaving machine has the disadvantage that its weft insertion performance is limited. The insertion performance is limited in particular by the maximum number of simultaneously open sheds, by the time required for the infeed of the warp threads into the shed-forming elements, as well as by the maximum permissible weft insertion velocity as a result for example of the strength of the weft thread to be woven.


SUMMARY OF THE INVENTION

The object of the present invention is to improve the weft insertion performance.
The inventive process for producing a cloth by means of a series shed weaving machine having a weaving rotor is carried out in such a manner that at least two separated webs are arranged on the weaving rotor, and that at least two of the webs are supplied with separate weft threads, respectively fed to only one of the webs in each case. Two weft thread presentation devices can be placed for example in the region of the two end surfaces of the weaving rotor so that the weft threads departing from these regions are inserted from both sides and move towards the middle of the weaving rotor. Furthermore, the two weft thread presentation devices can supply the weft thread to the weaving rotor between two separated webs, with the weft threads moving in opposite directions, each being inserted into one of the two webs. The weft threads can also be inserted moving in the same direction by having the one weft thread presentation device supply the weft thread to the weaving rotor at one end face and a second weft thread presentation device supply the weft thread to the weaving rotor between the two spaced apart webs. The series shed weaving machine can also have a weaving rotor with more than two spaced apart webs. Furthermore, the series shed weaving machine can also have more than two weft thread presentation devices.
Such a method and such an apparatus have the advantage that the weaving production of the series shed weaving machine can be doubled or multiplied while holding the rotational speed constant.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1a is a front view of a double web series shed weaving machine;
FIG. 1b is a front view of a part of the series shed weaving machine;
FIGS. 1c, 1d, 1e illustrate various possibilities for arranging a weft thread presentation device; and
FIG. 2 is a side view of the series shed weaving machine.


DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1a shows a front view of a series shed weaving machine 1 with a weaving rotor 6, which has shed-forming sections 6a, 6b equipped with shed-forming elements 17a in accordance with FIG. 2. The weaving rotor 6 has a centrally extending shaft with a center of rotation 6c. The two shed-forming sections 6a, 6b are spaced apart in the direction of extent of the center of rotation 6c. The weaving rotor 6 has end sections 6e, 6f at both ends which are supported by holding devices 11a. The end sections 6e, 6f each have in addition a weft thread transfer device 7a, 7b; 8a, 8b in order to associate an open weaving shed with each of the supplied weft threads 2a, 2b, 2c, 2d; 3a, 3b, 3c, 3d. The series shed weaving machine 1 shown has in addition a middle support 11b with a middle bearing 15 for the weaving rotor 6.
As shown in FIG. 1b, warp threads 10a are arra

REFERENCES:
patent: 3734143 (1973-05-01), Svaty
patent: 4425946 (1984-01-01), McGinley
patent: 4838321 (1989-06-01), Ishido et al.
patent: 5146955 (1992-09-01), Steiner et al.
patent: 5349990 (1994-09-01), Gacsay
patent: 5439037 (1995-08-01), Christe

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