DE69809298T2 - METHOD FOR REUSING EDGEWORK THREADS AND DEVICE FOR IMPLEMENTING THE METHOD - Google Patents

Description

Field of the invention

This invention relates to a method for recovering edge warp threads in a textile weaving process and a device for carrying out the method.

State of the art

Previously, the edge warp yarns that bind the filling yarns during the weaving process were separated from the fabric warp yarns and removed.

DE 30 25 744 describes a device in which the edge warp yarns are kept at a distance from the main warp yarns forming the fabric. After weaving, the continuous edge warp yarns are severed from the main fabric body, the cut warp yarns are removed, and the edge warp yarns are returned to the weaving machine.

This invention is also directed to a method and apparatus for reducing waste by reclaiming the edge warp yarns. The edge warp yarns are passed through the loom in a continuous pattern, returned through a spreader to shed the cut edge filler yarns, and recombined for re-run through the loom.

Summary of the invention

According to the practice of the invention, there is provided a method for recovering edge warp yarns in a weaving operation comprising:

a. Providing a plurality of edge warp yarns forming a continuous loop through the loom;

b. feeding the edge warp yarns in close proximity to an outer fabric warp yarn;

c. Weaving filling yarns through all warp yarns;

d. separating the filling yarns between the outer fabric warp yarn and the inner edge warp yarn;

e. passing the edge warp yarns through a separator to allow removal of the cut filler yarn fringe ends from the edge warp yarns; and

f. Recombining the edge warp yarns to feed them back through the loom;

the method being characterized in that:

after separating the filling yarns between the outer fabric warp yarn and the inner edge warp yarn, the cut filling yarn fringe ends and the edge warp yarns are passed through a shaking bar in order to shake the cut filling yarn fringe ends off the continuous edge warp yarns.

A device for recovering the edge warp yarns in a weaving process is also provided with:

a. means for introducing a plurality of continuous edge warp yarns into a loom;

b. a loom for weaving the warp yarns with filling yarns to form a fabric;

c. a separating means for separating the filling yarns between an innermost edge warp yarn and an outermost main fabric warp yarn;

the device being characterized by:

d. Guide rollers to guide the cut edge portion through a to lead horn guidance;

e. a shaking bar for shaking off the cut filling yarn fringes from the continuous edge warp yarns; and

f. a spreader bar with spaced guides for each continuous edge warp yarn to assist in removing the filler yarn fringe.

Short description of the drawings

Fig. 1 is a schematic side view of the weaving process according to the invention.

Fig. 2 is a schematic plan view of the weaving process according to the invention.

Fig. 3 is an enlarged view of the separation process according to the invention.

Description of the invention

A textile weaving system is shown generally at 10, wherein the main fabric warp yarns 12 are fed from skewers 13 (Fig. 2) together with the continuous edge warp yarns 14 to the compression stage 16 in the loom 18 by guide rollers 20 under a dancer roller 22 which reciprocates vertically to adjust the tension on the warp yarns as shown by the double arrow.

The warp yarns then pass through warp thread monitors 24, which detect whether one of the warp yarns is broken and then stop the weaving process. The warp yarns then pass through the heddles 26, which rise and fall adjacent to the warp yarns or groups thereof to form the shed 25 through which the filling yarns 27 are passed to form the web.

The reed 28 is a comb-like device which separates the warp yarns and also allows the successive filling yarns to strike against the existing fabric. The fabric thus produced then passes through the separating means 30, which separates the filling yarns 27 between the innermost continuous edge yarns 14 and the outermost main fabric warp yarns 12. Preferably, a distance of 3 to 9 mm is maintained between these yarns during weaving.

The selvedge is then separated from the main tape via a guide roller 33, the main tape being wound onto a take-up roller 32 and the edge being guided through a horn guide 36 to a roller 34 under the loom and to a spreader bar 41 having spaced guides 42 which separate the continuous edge warp yarns 14 to allow the filler edge yarns 40 to be shed from the continuous edge warp yarns 14 by means of the shaker bar 38 attached to the dancer roller 22 with its up and down movement.

The continuous edge warp yarns are then gathered together via rollers 44 for re-passing through the loom.

Certain representative embodiments and details have been shown to illustrate the invention, but it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the invention.

Claims (3)

1. A method for recovering edge warp yarns in a fabric weaving process, comprising: a. providing a plurality of edge warp yarns (14) forming a continuous loop through the loom (18); b. feeding the edge warp yarns (14) in close proximity to an outer fabric warp yarn (12); c. weaving filling yarns (27) through all warp yarns (12, 14); d. separating the filling yarns (27) between the outer fabric warp yarn (12) and the inner edge warp yarn (14); e. passing the edge warp yarns (14) through a separator (41) to allow removal of the cut filler yarn fringe ends (40) from the edge warp yarns (14); and f. Recombining the edge warp yarns (14) to feed them back through the loom (18); the method being characterized in that: after separating the filling yarns (27) between the outer fabric warp yarn (12) and the inner edge warp yarn (14), the cut filling yarn fringe ends (40) and the edge warp yarns (14) are passed through a shaking bar (38) in order to shake off the cut filling yarn fringe ends (40) from the continuous edge warp yarns (14). 2. The method of claim 1, wherein the outermost fabric warp yarn (14) is spaced from the innermost continuous edge warp yarn (12) by a distance of 3 to 9 mm. 3. Device for recovering the edge warp yarns (14) during a weaving process, comprising: a. means (44) for introducing a plurality of continuous edge warp yarns (14) into a loom (18); b. a loom (18) for weaving the warp yarns (14) with fill yarns (27) to form a fabric; c. a separating means (30) for separating the filling yarns (27) between an innermost edge warp yarn (14) and an outermost main fabric warp yarn (12); the device being characterized by: d. guide rollers (33, 34) for guiding the cut edge portion through a horn guide (36); e. a shaking bar (38) for shaking off the cut filling yarn fringes (40) from the continuous edge warp yarns (14); and f. a spreader bar (41) with spaced apart guides (42) for each continuous edge warp yarn (14) to assist in removing the filler yarn fringe (40).