Textiles: spinning – twisting – and twining – Apparatus and processes – Open end spinning
Reexamination Certificate
2000-03-29
2001-12-04
Worrell, Danny (Department: 3765)
Textiles: spinning, twisting, and twining
Apparatus and processes
Open end spinning
Reexamination Certificate
active
06324826
ABSTRACT:
BACKGROUND
The invention concerns a thread guiding element for a thread departing out of the thread forming zone of a spinning machine.
A thread guiding element of such a type has been disclosed, for instance, by DE 42 35 024 A1. This element possesses an entry area for the thread, which is proximal to the thread forming zone of the spinning machine and another area, which is remote from the said thread forming zone. These two areas are tubular in design and their axes intersect at an angle. The spun thread enters into the thread guide tube, has its direction of travel changed therein, and leaves the thread guide tube through that part mentioned which is remote from the thread forming zone. The thread guide tube is comprised of several individual parts, which are securely fastened to one another. It is a practice of the present state of the technology to bind the several individual parts firmly together by adhesive.
DE 33 32 498 A1 teaches us that a thread guide tube is known, of which that part proximal to the thread forming zone and the part thereof remote from said zone, are made together as one piece. The center axes of these two parts likewise close an angle between them. In the area of the transition of the two sections of the thread guide tube this transition possesses an insert, which forms a restraining element for the thread which is traveling through. This insert is designed to be exchangeable.
The known thread guide tubes have the disadvantage, that in practice, they are inflexible since they have a rigid arrangement of the part proximal to the thread forming zone and the part which is remote from said zone. Under these circumstances, it is not possible to manipulate these two parts independently of one another, to install, or to replace one of them.
Thus, the purpose of the invention is to design a thread guide tube in such a manner that the possibilities of its use are essentially improved, and so that it can even be adapted for other, i.e. additional purposes, and further that the disadvantages of the state of the technology are avoided. This purpose is achieved, within the framework of the invention.
SUMMARY OF THE INVENTION
Objects and advantages of the invention will be set forth in part in the following description or may be obvious from the description, or may be learned through practice of the invention.
By means of the invented arrangement of the thread guide tube with a separating feature, the advantage is achieved that the thread guide tube can be disassembled and thereby, the field of application and construction possibilities for the thread guide tube are essentially expanded. It is now possible, for instance, to so fashion the thread guide tube, that where abrasion is a problem, individual parts of the thread guide can be exchanged without the necessity that at the same time the inserts i.e. inside the thread guide tube, must also be exchanged.
Further, it is possible, for instance, to construct the thread guide tube out of various materials. New and other raw materials for different sections of the thread guide tube can be employed, making the design more versatile and economical. A further advantage of the separable sectioning is found therein that upon maintenance work on a spinning machine the thread guide tube can be taken apart, whereby a considerably simplified cleaning of the thread guide tube is possible partly because this unit no longer needs to be completely removed from the spinning apparatus. By means of the invented formulation, it is also possible to so design certain parts of the thread guide tube which are exposed to no wear, so that they practically never need to be exchanged. These parts also can be originally so constructed that they need not be replaced, since now materials can be employed which although more valuable and thus higher in price, are also characterized by an increased operative lifetime.
By the designing of the thread guide tube with a separation in the area of the second section of the thread guide tube, which is remote from the thread forming zone, a particular advantage is achieved. This occurs in that an apportionment of the thread guide tube is made separating one area which has very little wear from another area which is subject to greater wear. Because of this, a flexible design of the thread guide tube becomes possible, especially in regard to costs.
In a further advantageous embodiment of the invention, the thread guide tube in the area of the first section, which is proximal to the thread forming zone, is provided with a separating arrangement. What is achieved by this is that an easier cleaning of the thread guide tube is possible, and in some cases exchangeable inserts, for instance a restraining element in the thread guide tube for the increasing of the twisting of the thread, can be more easily exchanged.
Particularly of advantage, is that the separable point is arranged between two sections of the thread guide tube. This is particularly advantageous for cleaning. In a more favorable way the thread guide tube, at least in that area proximal to the thread forming zone, is designed as an enclosed tube whereby a particularly accurate guidance of the thread is possible.
Also, the zone remote from the thread forming zone can be equipped without any trouble to have the same advantage. Favorably, both zones of the thread guide tube have, respectively, a centerline axis which intersects at an angle. In this way it is possible to spin the threads with good characteristics. It is particularly of advantage when the thread guide tube is divided into two parts of which at least one possesses a coupling element for a mutual connection. By such a coupling element it is possible to make not only a secure connection, but one which can be easily opened.
The coupling element is particularly advantageous when designed as a bayonet or a clip-on type fastener which unite the two parts of the thread guide tube in a simple and safe manner, and which also allow an easy separation without tools. In another preferred embodiment of the thread guide tube, the connection is made by a coupling element provided with threads. The two engaging parts of the threaded connection work advantageously together in such a manner that a secure closure is made between the two parts of the thread guide tube which is easily loosened and can be easily tightened together again. In an especially advantageous development of the invention one part of the thread guide tube in the neighborhood of the separation takes the other part into its interior.
This construction assures that the two parts align themselves with one another when connected. Thus, during assembly as well as in operation, lining up the two parts with respect to each other becomes easier to carry out and good functioning is assured. At the same time the penetrative connection is more stable.
In yet another advantageous development of the invention, one of the parts of the thread guide tube carries a sensor. Because of the invented arrangement of the thread guide tube, the advantage is brought about that the sensor can be installed directly on the thread guide tube because the separative design allows, that in case of need, parts of the thread guide tube to be exchanged without simultaneously removing the sensor. It may be also advantageously arranged that the sensor itself can be replaced by another sensor without having always to switch the entire thread guide tube when this is done. Because of the arrangement of the thread guide tube, in accord with the invention, the particularly favorable possibility arises of placing a sensor on the thread guide tube without the sensor being limited by the operating life of the thread guide tube or by the parts thereof which are prone to wear. Furthermore, it is advantageously possible to place the sensor in the neighborhood of the separation so that an easy cleaning and monitoring of the sensor is possible. In an advantageous development of the invention the sensor is in the area of that section of the thread guide tube remote from the thread for
Leipnitz Heinz
Pohn Romeo
Schermer Josef
Schuller Edmund
Dority & Manning P.A.
Rieter Ingolstadt Spinnereimaschinenbau AG
Worrell Danny
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