Title of Invention

OPEN - END ROTOR SPINNING DEVICE

Abstract

Open-end rotor spinning device comprising a spinning rotor, which rotates during the spinning process at a high speed in a rotor housing, which can be subjected to low pressure and which can be closed by a covering element, comprising a single motor-driven opening cylinder, which rotates in an opening cylinder housing, and also comprising an at least two-part fibre guiding channel, wherein the output-side channel section of the fibre guiding channel extends in a channel plate adapter, the centre longitudinal axis of which extends coaxially to the axis of rotation of the spinning rotor, and the input-side channel section of the fibre guiding channel is positioned in the opening cylinder housing in such a way that the centre longitudinal axes of the channel sections are arranged inclined with respect to one another, characterised in that the input-side channel section (30) of the fibre guiding channel (18) is mounted so as to be movable to a limited extent with respect to the output-side channel section (31) of the fibre guiding channel (18), the centre longitudinal line (32) of the input-side channel section (30) being displaceably arranged with respect to the centre longitudinal line (33) of the output-side channel section (31) by angles (α, β) to achieve optimal yarn-dynamic values.

Full Text

FORM 2 THE PATENT ACT 1970 (39 of 1970) & The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10, and rule 13) 1. TITLE OF INVENTION OPEN-END ROTOR SPINNING DEVICE 2. APPLICANT(S) a) Name b) Nationality c) Address SAURER GMBH & CO., KG. GERMAN Company LANDGRAFENSTRASSE 45, D-41069 MONCHENGLADBACH, GERMANY 3. PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention and the manner in which it is to be performed : - The invention relates to an open-end rotor spinning device according to the preamble of claim 1. As described in numerous patent documents, for example DE 198 00 402 Al or DE 198 59164 Al, open-end rotor spinning devices have a spinning rotor, which rotates during the spinning process at a high speed in a rotor housing subjected to low pressure. The rotor housing, which is open per se toward the front, is thus sealed in an air-tight manner during the spinning process by a covering element, into which a replaceable channel plate adapter is let. The covering element generally also has bearing brackets for an opening cylinder and for a fibre band feed cylinder. The covering element is connected so as to be movable to a limited extent to an associated spinning box housing via a pivot pin, which is arranged orthogonally to the axes of rotation of the opening cylinder and fibre band feed cylinder, the spinning box housing, for example, having the bearing and the drive for the spinning rotor. The individual fibres combed out from a feed fibre band by the opening cylinder are conveyed in such open-end rotor spinning devices via a so-called fibre guiding channel to the rotating spinning rotor and spun by the latter to form a thread which can be continuously drawn off. The open-end rotor spinning devices described in the above patent documents have two-part fibre guiding channels. In other words, an input-side channel section is arranged in a receiver of an opening cylinder housing, while an output-side channel section is arranged inside the replaceable channel plate adapter, which is positioned in a corresponding receiver in the covering element. During operation, the channel plate adapter, which can be replaced when necessary and is fixed in a precise position in the receiver of the covering element and which, apart from the output-side channel section of the fibre guiding channel, also has a hole to fix a thread draw-off nozzle, reaches with a tower-like attachment into the rotating spinning rotor. -2- In conjunction with open-end rotor spinning devices, it has furthermore been known for a long time that in order to be able to produce open end yarns of good quality, certain boundary conditions, in particular with respect to the mutual arrangement and dimensioning of the spinning elements have to be fulfilled. The design and arrangement of the orifice region of the fibre guiding channel, in particular the spacing of the orifice to the fibre slide face in the spinning rotor, for example, have a not insignificant influence on the yarn quality which can be achieved. In the interests of optimal spinning results, it is therefore advantageous to allocate a suitable channel plate adapter to each spinning rotor, in particular according to its diameter. This means that in general a change of the channel adapter plate also takes place when an exchange of the spinning rotors is carried out, for example in the course of a yarn batch change. It is also known that the fibre feed onto the fibre slide face of the spinning rotor can be positively influenced by a corresponding design of the fibre guiding channel. For example, the output-side channel section of the fibre guiding channel can be configured in such a way that its centre longitudinal line differs from a straight line. In other words, the output-side channel section of the fibre guiding channel arranged in the channel plate adapter is either, as described in DE 195 44 617 Al curved or has, as stated in DE 102 10 895 Al, an angled centre longitudinal line. According to DE 102 10 895 Al, an insertion piece is to be inserted into the output-side channel section of the fibre guiding channel, for example, in such a way that the centre longitudinal line of this channel section is angled. It has been found that owing to the curvature or the angled configuration of the output-side channel section, the fibre transport on this channel section and the feeding of the fibres onto the fibre slide face of the spinning rotor can be improved. From DE 198 36 066 Al, it is also known to arrange an input-side channel section of a fibre guiding channel connected to an opening cylinder housing and an output-side channel section of the fibre guiding channel arranged in a channel plate adapter in -3- such a way that the centre longitudinal lines of these channel sections are arranged inclined at an angle. Such an arrangement of the channel sections of a fibre guiding channel has also proven advantageous for the producible yarn quality, in particular when the angle between the centre longitudinal lines of the channel sections is matched precisely to the existing yarn and/or spinning parameters. Proceeding from the above-mentioned prior art, the invention is based on the object of providing a fibre guiding channel of the type described above, which, in a simple manner, allows optimisation of the fibre feed onto the fibre slide face of a spinning rotor, in particular taking into account the respectively existing yarn and/or spinning parameters. This object is achieved according to the invention by a device, as described in the characterising part of claim 1. Advantageous configurations of the invention are the subject of the sub-claims. The embodiment of a fibre guiding channel according to the invention described in claim 1 has the advantage, in particular, that even after an exchange of the spinning means, for example as a result of a change in the yarn batch, optimal flow conditions can easily be ensured in the region of the fibre guiding channels and therefore an optimal fibre feed onto the fibre slide faces of the spinning rotors can be ensured. In other words, after an exchange of the channel plate adapter, which has become necessary owing to the change of the spinning rotor, it can be achieved, quickly and without problems, owing to a corresponding adaptation of the installation position of the input-side channel section of the fibre guiding channel that, between the centre longitudinal lines of the channel sections of the fibre guiding channel, optimal angles of inclination are adjusted. These optimal angles of inclination ensure that a uniform feed of the individual fibres onto the fibre slide face of the spinning rotor takes place. The input-side channel section, preferably fixed in a receiver of the opening cylinder housing, of the fibre guiding channel can be pivoted with the -4- opening cylinder housing and be positioned without any problems such that all the desired angles of inclination can be implemented easily within certain adjustment ranges. This means that owing to the configuration of the fibre guiding channel according to the invention, which easily allows at any time, a defined positioning of the input-side channel section and therefore an optimal adjustment of the angles of inclination which can be adjusted between the centre longitudinal lines of the two channel sections, the stocking of a large number of input-side channel sections matched in each case especially to a specific channel plate adapter or its output channel section is superfluous. The possibility of defined adjustment of the angles of inclination between the channel sections of a fibre guiding channel also offers at all times, the chance of intervening in a targeted manner in the course of the flow of the transporting air stream acting inside the fibre guiding channel and improving the yarn-dynamic values of the yarn to be produced by optimisation of the flow conditions. Advantageously, the optimum adjustments of the angles of inclination here, as described in claim 2, are already determined empirically beforehand, and for example filed in an electronic memory or in corresponding tables. An embodiment as described in claim 3 has proven particularly advantageous. In this embodiment, the opening cylinder housing with an input-side channel section of the fibre guiding channel positioned in a receiver of the opening cylinder housing, is mounted so as to be rotatable to a limited extent about a pivot point, which is located in the contact region of the two channel sections of the fibre guiding channel. The opening cylinder housing can be adjusted in this case both in first planes extending parallel to the axis of rotation of the spinning rotor and also in second planes extending parallel to the front side of the opening cylinder housing and can be fixed in each case in defined installation positions. In other words, an embodiment of this type allows a stepless adjustment of the angle position of the centre longitudinal line of the input-side channel section of the fibre guiding channel and therefore an exact adjustment of predetermined angles of inclination to the centre longitudinal line of -5- the output-side channel section of the fibre guiding channel. The position of the centre longitudinal line of the output-side channel section arranged in the channel plate adapter preferably remains unchanged in this case. In other words, at least the position of the centre longitudinal axis of the channel plate adapter coaxially to the axis of rotation of the spinning rotor is predetermined by the installation position of the spinning rotor. As already indicated above, owing to the defined adjustment of the angles of inclination between the centre longitudinal lines of the output-side and the input-side channel section of the fibre guiding channel, the course of the flow inside the fibre guiding channel can be influenced in a targeted manner and therefore the feeding of the individual fibres brought with the transporting air stream onto the fibre slide face of the spinning rotor can be optimised. As shown in claim 4, it is provided in an advantageous embodiment that the input-side channel section of the fibre guiding channel is configured in its orifice region as a ball joint, which, in the installed state corresponds with the input region, configured as a spherical cap, of the output-side channel section arranged in the channel plate adapter. The ball joint, in conjunction with the spherical cap, forms the pivot point for the input-side channel section of the fibre guiding channel or for the displaceably mounted opening cylinder housing. A ball joint configuration of this type of the contact region of the two channel sections ensures a maximum angle mobility of the two components of the fibre guiding channel with respect to one another and allows a stepless adjustment of the adjustably mounted input-side channel section with respect to the output-side channel section preferably arranged in a rigid installation position. As described in claims 5 and 6, the centre longitudinal line of the input-side channel section can be steplessly adjusted with respect to the centre longitudinal line of the output-side channel section of the fibre guiding channel in numerous planes. In other words, within predetermined adjustment ranges, any desired angle of inclination can be adjusted between the centre longitudinal lines of the two channel sections. In first planes, which extend parallel to the axis of rotation of the spinning -6- rotor, an angle of inclination can be adjusted, for example, which may be between 0.1° and 10°. In second planes, which extend in each case parallel to the front side of the opening cylinder housing, the adjustable angle of inclination is between 1° and 20°. Via the angles of inclination between the channel sections, as already indicated above, the course of the flow of the transporting air stream present in the fibre guiding channel can be influenced in a targeted manner and thus optimally adapted to the respectively existing conditions both with regard to the spinning means and also to the material to be spun. As indicated in claims 7 to 9, it is also provided in an advantageous embodiment that the opening cylinder housing is pivotably connected to the covering element via a special bearing bracket. The bearing bracket is, for example, displaceably mounted on a pitch circle-shaped guide rail, and can be steplessly adjusted on this guide rail by a corresponding actuating drive and positioned precisely. In other words, with the bearing bracket, the opening cylinder housing and therefore the input-side channel section arranged in a receiver of the opening cylinder can be adjusted in a defined manner relative to the covering element in planes parallel to the front side of the opening cylinder housing. The input-side channel section is steplessly adjusted in this case around the pivot point described above, arranged in the contact region of the channel sections and formed by a ball joint connection. Arranged on the bearing bracket is also a likewise pitch circle-shaped guide device, in which the opening cylinder housing is adjustably mounted with corresponding guide lugs. A corresponding actuating drive also allows a stepless adjustment here of the opening cylinder housing in the guide device. In other words, the opening cylinder housing is adjustable inside the guide device in planes, which extend in each case parallel to the axis of rotation of the spinning rotor. In this case, the pivoting of the input-side channel section also takes place steplessly about the -7- above-mentioned ball joint connection in the contact region of the two channel sections of the fibre guiding channel. Further details of the invention can be inferred from a following embodiment shown with the aid of the drawings, in which: Fig. 1 shows an open end rotor spinning device, with a pivotably mounted opening cylinder housing, in a side view, Fig. 2 shows the open-end rotor spinning device according to Fig. 1 in a front view, Fig. 3 shows a side view of the two-part fibre guiding channel of the open end rotor spinning device according to the invention, partially in section, Fig. 4 shows a front view of the two-part fibre guiding channel according to the invention, according to Fig. 3, partially in section. Open-end rotor spinning devices which, as merely schematically indicated in Figs. 1 and 2, are equipped with a single drive for the spinning rotor and, in each case, with single drives for the opening cylinder and the fibre band feed cylinder, are known in principle and described, for example, in the subsequently published DE 103 40 657 Al. Such open-end rotor spinning devices 1 have, for example, a spinning rotor 16 supported in magnet bearings (not shown), and electromagnetically driven by a single drive 3. The spinning cup of a spinning rotor 16 of this type merely indicated schematically in Fig. 1 by its axis of rotation 17, rotates during the spinning operation at a high speed in a rotor housing 2 which is subjected to low pressure. Spinning rotors mounted and driven in this manner are basically known and described in relative detail, for example, in EP 0 972 868 A2. -8- In the embodiment shown, the rotor housing 2 of the open-end rotor spinning device 1, is preferably configured as a central, carrying component and consists of a metal with good heat conductivity, for example aluminium. The rotor housing 2 is, as conventional, connected via a pneumatic line 10 to a low pressure source (not shown). Apart from an individual drive for the spinning rotor 16, and an associated housing 14 for the control electronics 15, carriers 4 are also fixed via dowel pins and screw bolts to this rotor housing 2, which carriers are configured as bearing arms and have, in each case, on the ends, a bearing point equipped with a sliding bushing 28. A covering element 6 is pivotably mounted in these bearing points and closes the rotor housing 2 during spinning operation. In other words, the covering element 6 rests with an annular seal 13 on the front wall of the rotor housing 2 and closes this in an air-tight manner. The pivot axis of the covering element 6 is characterised by the reference numeral 5. As can be seen, in particular from Fig. 3, the covering element 6 has a receiver 12 which is open in the direction of the spinning rotor 16, at the level of the axis of rotation 17 of the spinning rotor 16, into which receiver a channel plate adapter 11 can be fixed so as to be easily replaceable. In other words, the central longitudinal axis of the channel plate adapter 11 runs coaxially to the axis of rotation of the spinning rotor 16. As further indicated in Figs. 3 and 4, the output-side channel section 31 of a fibre guiding channel 18, is integrated, inter alia into the channel plate adapter 11 and connects the opening cylinder housing 19, pneumatically continuously, to the rotor housing 2. The input side channel section 30 of this fibre guiding channel 18 is arranged in a receiver 26 of the opening cylinder housing 19 fixed, as explained below, so as to be movable to a limited extent on the carrier element 6. A fibre band opening mechanism 23 of the open-end rotor spinning device 1 is integrated, as usual, into the opening cylinder housing 19, which is mounted so as to -9- be movable to a limited extent. In other words, a single motor-driven fibre band drawn-in cylinder 8A, the axis of rotation of which is designated 8, and a single motor-driven opening cylinder 7A, the axis of rotation of which bears the reference numeral 7. As further indicated in Fig. 1, the opening cylinder housing 19 is connected via a guide device 42 to a bearing bracket 40 and can be pivoted by means of an actuating drive, which is indicated schematically by a double arrow 44, in planes, which are located in each case parallel to the axis of rotation 17 of the spinning rotor 16. The pivot point S in this case lies in the contact region of the channel sections 30, 31, of the fibre guiding channel 18. In other words, the central longitudinal line 32 of the input-side channel section 30 of the fibre guiding channel 18 arranged, as shown in Figs. 3 and 4, in a receiver 26 of the opening cylinder housing 19, can be adjusted with respect to the centre longitudinal line 33 of the output-side channel section 31 by an angle a, which is preferably between 0.1° and 10°. As the bearing bracket 40 is also in turn displaceably fixed on the covering element 6, as indicated in Fig. 2, via a guide rail 41, the opening cylinder housing 19 and therefore also the input-side channel section 30 of the fibre guiding channel 18 can also be adjusted by an angle 6 in planes, which are located in each case parallel to the front side of the opening cylinder housing 19. The angle position of the respective plane of the front side of the opening cylinder 19 is produced in this case from the angle a. The pivot point S is also located here in the contact region of the channel sections 30, 31 of the fibre guiding channel 18. The angle p which can be adjusted between the centre longitudinal lines 32,33 of the channel portions 30,31 of the fibre guiding channel 18 is, in this case, between 1° and 20°. The pivoting of the opening cylinder housing 19 preferably takes place via a corresponding actuating drive, which can be controlled in a defined manner, which is indicated schematically by a double arrow 43 in Fig. 2. -10- The pivot point S for the opening cylinder housing 19 and therefore for the input-side channel section 30 is located, as already indicated above, and in particular visible from Figs. 3 and 4, in the contact region of the channel sections 30, 31 of the fibre guiding channel 18. The input-side channel section 30, in the region of its orifice 27, has a ball joint 29, which corresponds with a correspondingly configured spherical cap 34 in the region of the inlet opening 35 of the output-side channel section 31. In other words, the central longitudinal lines 32,32 of the channel sections 30, 31, intersect in the region of the pivot point S. As indicated in Figs. 3 and 4, by corresponding pivoting of the opening cylinder housing 19, any angle of inclination a, which is between 0.1° and 10°, and also any angle of inclination 3, which can be between 1° and 20°, can be steplessly adjusted between the centre longitudinal lines 32, 33 of the channel sections 30, 31 of the fibre guiding channel 18 and therefore the fibre flow within the fibre guiding channel 18 can be optimised. -11- WE CLAIM 1. Open-end rotor spinning device comprising a spinning rotor, which rotates during the spinning process at a high speed in a rotor housing, which can be subjected to low pressure and which can be closed by a covering element, comprising a single motor-driven opening cylinder, which rotates in an opening cylinder housing, and also comprising an at least two-part fibre guiding channel, wherein the output-side channel section of the fibre guiding channel extends in a channel plate adapter, the centre longitudinal axis of which extends coaxially to the axis of rotation of the spinning rotor, and the input-side channel section of the fibre guiding channel is positioned in the opening cylinder housing in such a way that the centre longitudinal axes of the channel sections are arranged inclined with respect to one another, characterised in that the input-side channel section (30) of the fibre guiding channel (18) is mounted so as to be movable to a limited extent with respect to the output-side channel section (31) of the fibre guiding channel (18), the centre longitudinal line (32) of the input-side channel section (30) being displaceably arranged with respect to the centre longitudinal line (33) of the output-side channel section (31) by angles (a, P) to achieve optimal yarn-dynamic values. 2. Open-end rotor spinning device according to claim 1, characterised in that the optimal values for the respective spinning rotor (16), of the angles (a, P) which can be adjusted between the centre longitudinal lines (32, 33) of the channel sections (30, 31), can be determined empirically. 3. Open-end rotor spinning device according to claim 1, characterised in that the opening cylinder housing (19) with the input-side channel section (30), positioned in a receiver (26) of the opening cylinder housing (19), of the fibre guiding channel (18), can be rotated to a limited extent about a pivot point (S) arranged in the contact region of the channel sections (30,31), can be adjusted in first planes parallel to the axis of rotation (17) of the spinning rotor (16) and in -12- second planes (B) parallel to the front side of the opening cylinder housing (19) and can be fixed in a predeterminable installation position. 4. Open-end rotor spinning device according to claim 1, characterised in that the input-side channel section (30) of the fibre guiding channel (18) is configured in its orifice region (27) as a ball joint (29), which in the installed state, corresponds with the input region (35), configured as a spherical cap (34), of the output-side channel section (31), arranged in the channel plate adapter (11), of the fibre guiding channel (18). 5. Open-end rotor spinning device according to any one of the preceding claims, characterised in that the input-side channel section (30) of the fibre guiding channel (18) can be adjusted in planes, which are located parallel to the axis of rotation (17) of the spinning rotor (16) in such a way that the centre longitudinal line (32) of the input-side channel section (30) adopts an angle (a) with respect to the centre longitudinal line (33) of the output-side channel section (31) of the fibre guiding channel (18), which is between 0.1° and 10°. 6. Open-end rotor spinning device according to any one of the preceding claims, characterised in that the input-side channel section (30) of the fibre guiding channel (18) can be adjusted in planes, which are located in each case parallel to the front side of the opening cylinder housing (19) in such a way that the centre longitudinal line (32) of the input-side channel section (30) of the fibre guiding channel (18) adopts an angle (P) with respect to the centre longitudinal line (33) of the output-side channel section (31) of the fibre guiding channel (18), which is between 1° and 20°. 7. Open-end rotor spinning device according to any one of the preceding claims, characterised in that the opening cylinder housing (19) is connected to the covering element (6) via a displaceably mounted bearing bracket (40). -13- 8. Open-end rotor spinning device according to claim 6, characterised in that the bearing bracket (40) is displaceably mounted on a pitch circle-shaped guide rail (41), can be loaded in a defined manner by an actuating drive (43) and can be locked in predeterminable positions. 9. Open-end rotor spinning device according to any one of the preceding claims, characterised in that the bearing bracket (40) has a pitch circle-shaped guide device (42), on which the opening cylinder housing (19) is displaceably mounted and can be transferred into predeterminable positions by means of an actuating drive (44). HIRAIVCHANDRAKANT JOSHI AGENT FOR SAURER GMBH & CO., KG. Dated this 4th day of September, 2006 -14- ABSTRACT Open-end rotor spinning device comprising a spinning rotor, which rotates during the spinning process at a high speed in a rotor housing, which can be subjected to low pressure and which can be closed by a covering element, comprising a single motor-driven opening cylinder, which rotates in an opening cylinder housing, and also comprising an at least two-part fibre guiding channel, wherein the output-side channel section of the fibre guiding channel extends in a channel plate adapter, the centre longitudinal axis of which extends coaxially to the axis of rotation of the spinning rotor, and the input-side channel section of the fibre guiding channel is positioned in the opening cylinder housing in such a way that the centre longitudinal axes of the channel sections are arranged inclined with respect to one another, characterised in that the input-side channel section (30) of the fibre guiding channel (18) is mounted so as to be movable to a limited extent with respect to the output-side channel section (31) of the fibre guiding channel (18), the centre longitudinal line (32) of the input-side channel section (30) being displaceably arranged with respect to the centre longitudinal line (33) of the output-side channel section (31) by angles (a, P) to achieve optimal yarn-dynamic values. To, The Controller of Patents The Patent Office Mumbai. -15-

Documents:

1072-mumnp-2006-abstract(05-03-2008).doc

1072-mumnp-2006-abstract(05-03-2008).pdf

1072-mumnp-2006-abstract.doc

1072-mumnp-2006-abstract.pdf

1072-mumnp-2006-cancelled pages(05-03-2008).pdf

1072-mumnp-2006-claims(granted)-(05-03-2008).doc

1072-mumnp-2006-claims(granted)-(05-03-2008).pdf

1072-mumnp-2006-claims.doc

1072-mumnp-2006-claims.pdf

1072-mumnp-2006-correspondance-received.pdf

1072-mumnp-2006-correspondence(05-03-2008).pdf

1072-mumnp-2006-correspondence(ipo)-(31-10-2008).pdf

1072-mumnp-2006-description (complete).pdf

1072-mumnp-2006-drawing(05-03-2008).pdf

1072-mumnp-2006-form 1(05-09-2006).pdf

1072-mumnp-2006-form 18(05-09-2006).pdf

1072-mumnp-2006-form 2(granted)-(05-03-2008).doc

1072-mumnp-2006-form 2(granted)-(05-03-2008).pdf

1072-mumnp-2006-form 3(04-09-2006).pdf

1072-mumnp-2006-form 5(04-09-2006).pdf

1072-mumnp-2006-form--26.pdf

1072-mumnp-2006-form-1.pdf

1072-mumnp-2006-form-2.doc

1072-mumnp-2006-form-2.pdf

1072-mumnp-2006-form-3.pdf

1072-mumnp-2006-form-5.pdf

1072-mumnp-2006-form-pct-isa-210(05-03-2008).pdf

1072-mumnp-2006-form-pct-pea-409.pdf

1072-mumnp-2006-form-pct-pea-416.pdf

1072-mumnp-2006-form-pct-ro-101.pdf

1072-mumnp-2006-pct-search-report.pdf

1072-mumnp-2006-power of attorney(12-12-2003).pdf

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