DE685764C - Apparatus for the production of whole leno fabrics - Google Patents

Description

Apparatus for the production of whole leno fabrics is the subject of the invention is a device for the production of full-turn fabrics, their first half-turn is formed by a half heald with lifting healds.

In one carried out by means of a known device of this type Type of production of full-turn fabrics is the second half-turn by a Device generated, which consists of a shaft with forks, which between each two lamellas lined up on rails and the standing thread around the leno thread loop.

The device forming the subject of the present invention has in place of the two slats with the fork guided and controlled in between the known device for forming the second half-turn with a half-heald a hook into which the second loop thread is inserted through a lifting heald, which closes the insertion opening of the hook and the snake thread as it moves further thereby secures in the hook.

This full-turning device works with a few and also light ones Share. Vibrations, imbalances in chain tension and harmful oscillations the leno threads are thus prevented: the device according to the invention allows a higher working speed, namely the speed of normal looms, although the stress on the threads is less, so that there is less reason to to thread breaks and fabric defects. In addition, the device claims the invention in the direction transverse to the threads little space, the distance from one Twist cord to the next can therefore be kept significantly smaller. Therefore let produce denser, finer tissue with it than with known devices.

On the drawing is in Figs. I to .4 an embodiment of the subject matter of the invention in connection with the neighboring ones for guiding the warp threads serving parts, illustrated of a loom in different working positions.

The reed B is attached to the drawer L. Through the on two shafts lined up strands i and -2 run the loop threads 3 and q. through. These are also through the blade B and in a known manner through the leno heald 5, 6, 7 pulled so that the loop thread q. as leno thread through the thread eye is guided in the half heald 7 and the loop thread 3 between the two lifting healds 5 and 6 run as a standing thread. Between sheet B and the well-known turning shaft 5, 6, 7 is the all-twist heald 8, 9, 1 or the like forming the subject of the invention appropriate. This consists of a front lifting heald 8 and a rear lifting heald 9, which control the half-heald i o with the hook H attached at the top. The lifting healds 8 and 9 are lined up in a known manner on shafts and the half-heald i o a half shaft. The two loop threads 3 and q. are made by this full-twist braid drawn that they pass freely between the two lifting strands 8 and 9.

The loop thread q. makes half the loop in a familiar way,, ng around the loop thread 3 by means of the leno heddle 5, 6, 7. The second half of the loop performs the loop thread 3 by using the all-twist heald 8, 9, io around the Loop thread q. is pulled. In detail, the process is shown in the following FIG the basic position of all strands and threads.

Fig. 2. The lifting heald 6 with the half heald 7 is in an intermediate position upscale. This also made the loop thread q. upscale, which is also a half Wrapping of the loop thread 3 has the consequence. By pulling it up, the Loop thread q. except area of the rotating half-flashes ok. With the lifting heddle 6 are also lifted the lifting heald 8 and the leno half-heald io into an intermediate position, so that the small hook H of the half-heald io comes to rest over the loop threads 3.

Fig. 3. Now the lifting heald is made in a known manner by the dobby 9 in the upper compartment, pulled. This is now between the lifting heald 9 and the Half heald i o lying loop thread 3 through the lifting heald 9 over the rounding of the Half-flashes i o pushed into hook H. This is where the thread is held and through the further pulling up of the lifting heald 9 moves it into the middle of the half heald i o and in this way closes the opening of the hook, so that the loop thread 3 is guided like in a thread eye. The loop thread ¢ then slides at the further upward movement of the lifting heald 9, the half heald i o and the enclosed Thread 3 over the arched back of the hook H and the half-heald i o down and remains as a standing thread in the lower compartment. The rest, in their intermediate position pulled up strands must now return to their basic position. The first full turn of the two loop threads 3 and ¢ is: .- reached, and the weft S 'is now inserted.

, .Fig. q .. To achieve the second full turn around - @@ q reverses, you have to first the lifting 'strand 9 and the half strand i o lowered and, at the same time or subsequently the lifting heald 8 and the half heald i o are lifted into the intermediate position so that the loop thread 3 is pushed out of the hook H by the lifting heddle 8 and then. due to its natural tension over the curve of the half-heald i o can slide. The lifting heddle 8 immediately returns to the basic position; the lifting heald 5 with the half-heald 7 and the loop thread q. is known in a known manner by the The dobby is pulled into the upper shed, making the second full turn of the two loop threads is completed and the entry of the second shot S2 can take place. The lifting heald 5 and the half-heald 7 with the loop thread q. go back into the sub-compartment. This takes the threads 3 and q. all strands also have the basic position shown in FIG back on. The process described begins anew.

In FIGS. 1, 2 and ¢ the hook, H of the half-heald is for the better Illustration drawn uncovered; in reality it's just a little or not visible at all.

The illustrated full-turn device is when using the corresponding End loops and the well-known guiding of leno healds also for jacquard weaving applicable.

In the device shown, the known flat steel strands applied. The same device can of course also be used run the known strands from round wire, the hook of the whole dxeher half-lightning z. B. from a soldered flat steel hook or from round wire itself in known Way can be formed.

Claims (3)

PATENT CLAIMS; r. Device for the production of full-length leno fabrics, whose first half-twister is formed by a half-heald with lifting healds, thereby characterized in that to form the second half-turn a half-strand (io) with a The hook (H) is used, into which the second loop thread (3) is inserted through a lifting heald (9) -will, which closes the insertion opening of the hook (H) when it continues to move and thereby secures the loop thread in the hook. 2. Device according to Claim i, characterized in that the hook (H) of the half-heald (i o) such is shaped and arranged that after the loop thread (3) is inserted therein, as the half-heald (io) rises further, the first loop thread (q.) over the arched one Back sneezes hook and the half-heald (i o) slides down. 3. Device according to claim i and 2, characterized in that the hook (H) at the upper end of the half-heald (io) is attached and is shaped together with this so that the loop thread (3) after it has been pushed out of the hook (H) by the lifting heald (8), through his Tension across the curve of the half-heald (i o), slips off.