Terry loom with interpenetrating ground warp and pile warp

Abstract

A ground warp thread sheet and a pile warp thread sheet are supplied to a shed forming device. Two stop motions on separate planes respectively monitor the pile warp and the ground warp. The ground warp and the pile warp are deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before being deflected into the back shed. The vertices of the ground warp and pile warp back sheds are thus located on opposite sides of the deflecting rod. The pile warp crosses through the ground warp directly upstream from the deflecting rod, at a steep angle, for example from 45 to 135°.

Description

PRIORITY CLAIM[0001] This application is based on and claims the priority under 35 U.S.C. .sctn.119 of German Patent Application 100 23 445.3, filed on May 12, 2000, the entire disclosure of which is incorporated herein by reference.[0002] The invention relates to a terry loom with a first thread supply arrangement for supplying a ground warp thread sheet and a second thread supply arrangement for supplying at least one pile warp thread sheet, shed forming elements for shedding the warp sheets, and cloth drawing-in means.BACKGROUND INFORMATION[0003] Various methods and equipment are known for weaving a terry cloth with loops of a pile thread bound in by the weft threads. Typically, the pile loops are formed by a pile warp, while a further ground warp cooperates with the weft threads to form the base cloth. In this regard, the terry loom includes the components mentioned above and further includes weft insertion means and a reed or other weft beat-up means that cooperate with the abo...

AI Technical Summary

Problems solved by technology

In the above described known method and equipment, problems can arise while guiding together and combining the pile warp thread sheet with the ground warp thread sheet, particularly because neighboring pile warp threads can become hung-up or caught on one another while being let off from the pile warp beam, or the neighboring pile warp threads may even become partially looped around one another and thus tangled.

These problems are especially more likely to occur because the pile warp thread tension must be reduced during the group beat-up in order to form the pile loops in the pile warp threads.

If such pile warp threads that are hung-up or tangled with one another are fed into a warp thread stop motion in common with the ground warp threads, or especially all the way to the back shed and to the heddles, there is a danger that warp thread breaks or at least weave defects will arise.

The removal or correction of warp thread breaks in the area of the back shed in such looms is particularly difficult because the warp thread stop motions and the warp thread area between the stop motions and the tensioning roller for the pile warp threads is very difficult to access from the warp beam side.

Since the warp thread stop motions are arranged in an area of the back shed in which the pile warp thread sheet runs into the ground warp thread sheet at a rather small acute angle relative to the weaving plane, this leads to the additional problem that a relatively strong back and forth motion of the pile warp threads arises in the area of the warp thread stop motion during the shed forming and pile loop forming operations.

Such strong motion of the pile warp threads is undesirable, for example due to rubbing wear of the threads and resultant formation of fly lint, especially when weaving with rather sensitive pile warp threads.

Moreover, due to this arrangement of the warp thread stop motion directly in front of the area of the back shed, the warp thread movements also have a strong influence on the pile warp thread stop motion feelers during the group beat-up, with the result that forces arise in the pile warp threads, which act contrary to the pile loop forming process.

In other words, the arising tension forces tend to hinder the proper formation of the pile loops in the pile warp threads during the group beat-up.

In general it can be said that terry weaving is more difficult and more complex in comparison to flat weaving.

On the other hand, generally little attention is paid to the accessibility, maintainability and ease of operation with respect to the warp stop motions and the like, in these often quite complicated machines.

In view of the ever increasing capacity of commercial weaving looms, there is a constant trend toward using ever more warp beams with greater volume capacities, whereby the accessibility of the warp stop motions for operating or maintaining the same is further degraded or hindered.

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