Title of Invention

A MODULAR YARN FEEDER FOR TEXTILE MACHINES

Abstract

A modular yarn feeder (1) for textile machines, comprising a basic carrier (3) having a fastening device (4) arranged for connection to the textile machine or to a retainer provided on the textile machine; a shaft (14), pivotably supported on the basic carrier (3), the shaft (14) carrying a yarn guide drum (15) on one end, being connected to a drive device (18) the yarn guide drum (15) having at least one yarn outlet side; at least one adjustable yarn guide arrangement (25), assigned with a yarn guide element (93) disposed on the yarn outlet side, the yarn guide element is supported on a straight path (W) being adjustable between at least two positions both located below the yarn guide drum (15) and in spacing to the rotational axis (D), and in that an oblique draw off of the yarn from the yarn guide drum (15) takes place in said at least two positions.

Full Text

The invention relates to a yarn feeder for textile machines. Yarn feeders are used to feed yarns to yarn using stations, such as individual knitting stations in loop- forming textile machines. The yarn feeders are separate devices, which must be secured in great numbers to the machine. Depending on the use, special demands may ensue for the yarn feeder that require a certain adaptation. From the standpoint of the manufacturer of the yarn feeder, it is therefore expedient if the yarn feeders are easily adaptable to different situations, which can result from the type of textile machine used in a given case or from a particular practical use. Adaptation should be feasible at the least possible expense and with the simplest possible means. It is therefore the object of the invention to create a versatile yarn feeder. according to the features of the invention This object is attained The yarn feeder of the invention has an adjustable yarn guide arrangement. The latter includes a yarn guide element, such as a yarn eyelet, which can be adjusted between two different oblique draw-off positions relative to the yarn guide drum. Drawing the yarn off obliquely enables the traveling yarn to keep the yarn guide drum clean. The adjustment is affected along a specified path. Thus the yarn guide element can be transferred to at least two different positions, in which the yarn travels along the lower rim of the yarn guide drum at different angles. With a comparatively shallower payout course, that is, in a first position in which the yarn guide element is relatively high or in other words is only slightly below the lower rim of the drum but in turn is at a greater horizontal spacing from it, the yarn being paid out separates relatively slowly from the windings located on the yarn guide drum and is then paid out along the lower rim of the drum. This prevents the situation in which the yarn being paid out could tear the windings on the yarn guide drum down along with it. In this mode of operation, the yarn feeder is especially suitable for spun yarns, in which windings located side by side adhere relatively strongly to one another because of the filaments protruding from the yarn. In a second position, the yarn guide element is at a comparatively great vertical spacing from the lower rim of the yarn guide drum but in turn is set at a lesser horizontal spacing from the pivot axis. The yarn being paid out is drawn downward relatively steeply, so that it sweeps firmly over the lower rim of the yarn guide drum. In this mode of operation, fluff deposits and rings of fiber, which could form on the lower rim of the yarn guide drum, are swept off especially well. This operation is especially suitable for continuous-filament yarns. The advantage of the adjustable yarn guide element is that the payout angle of a yarn guided by the yarn guide element is adjustable. If the yarn is changed, for instance by being cut upstream of the yarn feeder and with a new yarn being spliced to the remaining end of the old yarn, then the new yarn travels through the yarn feeder to the textile machine without having to be threaded in manually. The yarn guide element can be adapted accordingly in its position to the filament properties of the yarn. Another advantage is attained if an existing yarn feeler lever (shutoff means) is capable of functioning in both adjusting positions of the yarn guide element without having to be repositioned. For instance, one yarn feeler lever is disposed such that it scans the yarn in the vicinity of a fixed yarn eyelet. Any adjustment of the yarn guide element does not substantially shift the switching point of the yarn feeler. The yarn feeder is furthermore preferably modularly designed. The basic device has a basic carrier, which on one end has a fastening device that is arranged for connection to the textile machine, and that at a point spaced apart from this has a rotacably supported, preferably vertically disposed shaft. The shaft is arranged on one end for connection to a yarn guide drum and on its other end is provided with a drive device. This device may be embodied by a pulley or the like. A coupling device is provided on the yarn feeder, and additional modules can be connected to it. Thus the yarn feeder can be adapted to different kinds of use by means of a plurality of modules. Beginning with a basic device, a construction kit can thus be created, with which a number of additional modules can be made. For the yarn feeder manufacturer, this means that the many types required can be made using only a few basic elements. Essentially, the yarn feeder is formed as a basic device by the parts that are each needed in a large number of applications. These include the basic carrier, its fastening device for connection to a machine, and a rotatably supported shaft along with a drive device, and a yarn guide drum that is preferably secured interchangeably to the shaft. Additional parts are connected to the basic carrier via one or more coupling devices. The coupling devices are disposed for instance on both sides of the shaft, which makes greater freedom of design possible for the mounting of additional modules. The coupling device is preferably assigned a retaining device, with which the counterpart is retained in its desired position. The retaining device may be a clamping device, detent device, or other kind of fastening means. The clamping device can for instance be formed by a chucking device, which deforms the guide device somewhat and thus brings about clamping by frictional engagement. The result is secure bearing of the additional module and large-area transmission of force as well as seating of the additional module without rattling. The large-area force transmission makes it possible to embody the coupling device of the same plastic as the basic carrier, even if the coupling device is required to transmit some forces. The additional module can be provided for receiving further elements, which are preferably retained interchangeably. If the additional module is a retainer that protrudes freely, for instance, then different yarn guide elements can be secured to it. Bearings for further supporting the shaft on the retainer can also be provided, if necessary. Another additional module may for instance be a yarn brake. Depending on the application, various types of brake can be kept on hand (driven, nondriven, with magnetic clamping of the brake elements, spring clamping, etc.). A further fixture module may be a friction module, which in addition to a friction drum that feeds the yarn by frictional engagement has means for defining the wrap angle of the yarn around the yarn guide drum. For bearing the yarn guide means or similar parts that belong to the friction drum, suitable connection means may also be provided on the underside of the basic carrier. The basic carrier is preferably formed by a two-shell housing, which is divided approximately horizontally. The housing parts are then separably joined to one another, and as a result the housing interior becomes accessible. Additional devices, such as electric switches, circuits, bearings for yarn feeler levers and the like, can be accommodated in the housing interior. Further details of advantageous embodiments of the invention Exemplary embodiments of the invention are shown in the accompanying drawings. Fig. 1, a modular yarn feeder in a perspective view; Fig. 2, the yarn feeder of Fig. 1, provided with additional parts, in a longitudinal sectional view; Fig. 3, the yarn feeder of Figs. 1 and 2, in a detail shown in perspective; Fig. 4, a yarn brake belonging to the yarn feeder of Figs. 1 and 2, shown in perspective; Fig. 5, the yarn feeder of Figs. 1 and 2, equipped with a retainer for bearing a yarh guide tube; Fig. 6, the yarn feeder of Fig. 2, in a side view; Fig. 7, the yarn feeder, refitted as a friction feeder, in a side view; Figs. 8 and 9, the yarn feeder in a setting for spun yarn and continuous-filament yarn, respectively, each in side view; and Figs. 10 and 11, housing parts of the yarn feeder, each in a fragmentary perspective view. In Fig. 1, a modular yarn feeder 1 is shown, which is used to feed a yarn 2 to a textile machine. The yarn feeder has a basic carrier, embodied as a housing, with a fastening device 4 that serves to secure the yarn feeder 1 to a suitable retaining device, such as the retaining ring of a knitting machine. The housing is constructed of two shells and has an upper housing part 5 and a lower housing part 6, which abut one another or fit in one another at a dividing seam 7. As seen from Fig. 2, the housing serving as a basic carrier 3 has two bearing seats 9, 10 for ball bearings 11, 12 for rotatably bearing a shaft 14. The shaft is oriented approximately vertically and has a yarn guide drum 15 on its lower end. This drum is preferably embodied in one piece as a deep-drawn sheet-metal part or as a ceramic part. By means of a retaining screw 17 screwed axially into a bl:_nd bore 16 of the shaft 14, the drum is joined to the shaft 14 in a manner fixed against relative rotation. One or more drive disks 18, 19 are disposed on the upper end of the shaft 14; via bearing devices, they are supported rotatably on the shaft 14, and they can be coupled rotatably to the shaft as needed by means of a coupling disk 21. The bearing seats 9, 10 are formed by tubular extensions on the upper and lower housing parts 5, 6. They are aligned with one another and have a cylindrical chamber, opening toward the outside, for receiving the respective ball bearing 11, 12. To assure the alignment of the two bearing seats 9, 10 to one another, a tubular extension 22 extending through the interior of the housing and surrounding the shaft 14 is provided on the lower housing part 6; it engages a corresponding receptacle 23 that :.s formed in the upper housing part 5. The extension 22 and the receptacle 23 fit without play in one another. A plurality of coupling devices 25, 26, 27 for securing additional modules are provided on the basic carrier 3. The coupling device 25 is embodied on the basic carrier 3 between the shaft 14 and the fastening device 4 and is shown separately in Fig. 3. The coupling device 25 includes a guide plate 28, which is disposed parallel to a housing face 29 and is solidly joined to the housing part 5 via ribs 31, 32. The guide plate 28, with the guide face 29 and with its side toward the guide face 29, defines two guide grooves 33, 34. A portion 28a of the guide plate 28 protruding freely past the rib 32 forms a fastening or clamping device for a foot that is meant to be slipped onto the guide plate 28. A threaded peg 46 is fed onto the portion 28a and extends, as shown in Fig. 2, into an opening 37 of the housing part 5. Leading through this opening 37 is a fastening screw 38 whose head is braced on a suitable annular shoulder 39 formed on the lower housing part 6. If the screw 38 is tightened, this causes a certain deformation of the guide plate portion 28a. In the yarn feeder shown in Figs. 1 and 2, the coupling device 25 includes a blind cap 41, which if needed completely covers the coupling device 25. The clamshell-like blind cap 41 has an interior 42, in which two opposed clamping cleats 43, 44 extend that between them define a slit. These cleats are arranged for being thrust into the guide grooves 33, 34. Once the blind cap 41 has been slipped in this way onto the coupling device 25, the fastening screw 38 can be tightened, causing the portion 28a to firmly clamp the blind cap 41 with its clamping cleats 43, 44. In the sane way as the blind cap 41, arbitrary other additional modules can be secured to the coupling device 25 and then each have a foot whose internal shape conforms to the internal shape of the blind cap 41. One such additional module can be seen in Fig. 5. A retainer 46 is secured on the basic carrier 3 and fits over the drive disks 18, 19; on its free end 47, it has a spring clamp 48 for securing a yarn guide tubule 49. Still other devices can be secured to the arm 4 6 as needed. The coupling device 26 shown in Fig. 2 serves for instance to secure a brake module 51. The coupling device 2 6 is formed by an approximately rectangular recess or pocket, into which the brake module is inserted by a base 52. The base 52 is guided and positioned by the side faces of the recess formed in the housing part 5. By means of a clamping screw 53, provided in the immediate vicinity of the recess, the base 52 is retained in the recess. The break module 51 is shown separately in Fig. 4. Its base 52 has two parts 56, 57, which are joined via a film hinge 54 and can be locked to one another. This purpose is served by a detent cleat 58, formed on the front free face end of the part 56, and a corresponding detent recess 59 in the other part 57 is associated with this cleat. The two parts 56, 57 serve the purpose of axially displaceable bearing of a brake carrier 61, which is formed by a bent wire element. This element has two legs 62, 63, parallel to one another, which are displaceably supported in suitable guides. The leg 62 is braced on the part 57 via a compression spring 64 and prestresses the brake carrier 61 in one direction (toward the shaft 14; see Fig. 2). On its free end, the leg 62 has a tappet 66, which cooperates with a cam provided on the shaft 14. Outside the base 62, the brake carrier 61 is provided with a molded yarn guide piece 68, which via a rib 69 carries two brake disks 71, 72, which are supported freely rotatably on the rib. The break disks 71, 72 adhere magnetically to one another. Additional fixtures may be a knot catcher 73 and a yarn inlet eyelet 74, which are both retained by the fastening screw. As Fig. 1 shows, the yarn inlet eyelet 74 is open, so that the yarn 2 can simply be placed in it from the side. The knot catcher 73 is formed for instance by a metal sheet provided with a narrow slit. The fastening screw 53 can also serve to retain a yarn inlet eyelet 75, which is disposed on an arm 7 6 above the drive disk 18. The coupling device 27 is formed by the outer conical or cylindrical face of the tubular extension 10, which extends into the interior of the yarn guide drum 15. As Fig. 6 or Fig. 2 also shows, the yarn guide drum 15 is therefore placed with its upper rim relatively far away from the underside of the housing part 6, approximately at the same level as a yarn guide eyelet 78, which is molded as a fixed yarn guide eyelet on the lower housing part 6. The interstice can be closed by a cover hood 79, which is slipped for instance onto the extension 10. As Fig. 7 shows, the yarn guide drum 15 can be supplemented with or replaced by a friction module 80. The friction module 80 includes the yarn guide drum 15 and a friction disk 81 joined to the drum in a manner fixed against relative rotation. The friction unit 80 also includes a setting lever 82, which has a yarn guide eyelet 83 at approximately the level of the transition between the friction disk 81 and the yarn guide drum 15 and otherwise extends radially to the pivot axis of the shaft 14. For pivotable bearing of the lever 82, clamping rings 84, 85 are slipped onto the coupling device 27 and seated on it; between them, they clamp an annular bearing region of the lever 82. The annular bearing region may be provided with one or more protrusions that engage corresponding recesses in the clamping rings 84, 85, in order to fix the lever 82 in various detent positions. In order to set the yarn feeder 1 for friction operation, in many cases an outlet brake 91 is expedient or required. This brake is preferably disposed between two yarn guide eyelets 93, 94 on the outlet side. For fastening the outlet brake 91 detachably to the yarn feeder, a base 95 is used, which is provided with a threaded opening and is located below the fastening device 4. This allows the outlet brake to be screwed on. It has a lower, approximately horizontally disposed brake disk, which is carried by a pin 97 provided with an opening. An upper brake plate is supported displaceably in the direction of the arrow on this pin and can be locked in its upper position. This disk, by its own weight, presses the yarn 2 against the brake disk 96. The yarn feeder 1 has an adjustable yarn guide arrangement, to which the yarn guide eyelet 93 belongs. To explain the structure and function, reference will be made below to Figs. 8 through 11. As seen from Figs. 8 and 9, the yarn guide eyelet 93 can be transferred to at least two different positions and locked in those positions. In the first position, shown in Fig. 8, the yarn guide eyelet 93 is located a short distance below a plane E, defined by the lower rim of the yarn guide drum 15, and is retained at a relatively great spacing from the pivot axis D of the drum. The preferably rectilinear path W along which the yarn guide eyelet 93 is adjustable or displaceable forms an acute angle with the pivot axis D, as shown in Fig. 9. The yarn guide eyelet 93 is carried by two substantially parallel wire legs 105 extending away from it, which are guided in a slot 106 formed in the housing. The slot 106, as shown in Figs. 10 and 11, is formed between the upper housing part 5 and the lower housing part 6. For each leg 105, there is one slot 106 on each side of the housing. In Figs. 10 and 11, the same reference numerals are therefore used for the slots 106 and their details, and the description applies equally to both slots 106. The slot 106 includes a pocket, which is formed between the upper housing part 5 and the lower housing part 6 and is open toward the bottom. The pocket is formed on the part of the housing part 5 by two groove-like or channel-like indentations 107, 108, between which a protrusion 109 is formed that is aimed at a corresponding cheek 111 of the lower housing part 6. Between the cheek 111 and the protrusion 109, however, a gap remains, through which the applicable wire leg 105 can be thrust. The wire legs 105 yield outward, however, so that on both ends of their path, which are formed by the indentations 107, 108, they snap into place. The channel-like indentations 107, 108 are thus both detent and guide means at the same time, because they support the wire legs 105 nonpivotably. The wire legs 105 are also seated axially nondisplaceably in the slot 106. To that end, ends bent inward or angled in some other way are formed on the wire legs 105 and engage the cheek 111, for instance, from behind, the cheek being embodied as flat itself and extending between to outward-protruding ribs 114, 115. As needed, the ribs 114, 115 can either engage the indentations 107, 108 or adjoin them. The narrow ribs 114 can for instance engage the recess 108 and thus with their inner flank can determine the alignment of the wire leg 105. The vertical orientation of the yarn guide eyelet 93 is thus associated with the lower housing part 6. The yarn guide eyelet 93 preferably allows a certain lateral play for the yarn but is disposed centrally on the housing. The yarn 2 travelling away from the yarn guide eyelet 93 and the pivot axis of the yarn guide drum 19 are thus preferably both located in the same plane. The yarn feeder of Fig. 1 described thus far functions as follows: In operation, the yarn 2 is put in place and threaded in, as shown. it extends through the inlet eyelet 74, through the space between the brake plates 71, 72, to the yarn eyelet 78, and the yarn 2 in the interstice holds a yarn feeler lever 100, here supported pivotably, in a raised position. Beginning at the yarn eyelet 78, the yarn 2 passes in multiple windings around the yarn guide drum 15 and then travels, obliquely sweeping the lower rim of the drum to the textile machine via the yarn guide eyeless 93, 94. Between the yarn guide eyelets 93, 94, a further yarn feeler lever 101 rests on the yarn, in order to monitor its tension. The yarn feeler lever 101 is connected to a switch, which furnishes a switching signal whenever the yarn feeler lever 101 drops below a minimum height. The yarn feeler lever 101 is disposed such that when the yarn is held taught, in each setting position of the yarn guide element 93, it is held in the same or at least nearly the same position. The rated position of the feeler lever 101 is as a result independent of the setting of the yarn guide element 93. This is attained by means of a pivotable bearing of the yarn feeler lever 101 in the vicinity of the pivot axis D and by a relatively long lever length; the yarn 2 is scanned in the vicinity of the fixed yarn guide eyelet 94. If needed, further yarn feeler elements may be provided, whose rated and switching positions are equally unaffected by the adjustment of the adjustable yarn guide arrangement. In operation, the yarn guide drum 15 is driven to rotate and thus feeds specified quantities of yarn. For instance, if a spun yarn, which has relatively many filaments protruding from the yarn, is to be processed, then the setting of the yarn feeder 1 as shown in Fig. 8 is preferred. The yarn guide eyelet 93 here is in an upper position at a relatively slight spacing below the plane E, but at a greater spacing from the pivot axis D. The yarn 2 is drawn off relatively shallowly and thus deviates rather slowly from the package located on the yarn guide drum 15. This prevents the yarn 2 being paid out from tearing windings of the package downward. If a comparatively smooth continuous-filament yarn is to be processed, then the yarn 2 is torn off upstream of the yarn feeder 1, and the new yarn is knotted to the end of the old yarn. Furthermore, for setting to the smoother continuous-filament yarn, the yarn guide eyelet 93 is transferred downward to the position shown in Fig. 9, in which it is farther away from the plane E but in turn closer to the pivot axis D. This spacing, however, is still greater than the diameter of the lower rim of the yarn guide drum 15. The yarn is now drawn off relatively steeply, so that it reliably sweeps over the rim of the yarn guide drum 15 and strips off any fluff or the like present there. For adjusting the yarn guard eyelet, the wire legs 105 are pressed together, counter to their own spring force, so that they emerge from the respective indentations 107 and 108 (see Fig. 10). The element formed by the yarn guide eyelet 93 and the wire legs 105 can be displaced in this condition along the path W. Once it is released at the end of the path, the wire legs 105 snap back into the respective indentations 107 or 108, and the yarn guide eyelet 93 is locked in its new position. The path W can be linear, or in other words a straight line. If needed, it can also be curved, for instance by disposing the yarn guide eyelet 93 on the end of a pivotably supported arm. If needed, intermediate positions can be provided, by forming suitable grooves in the protrusions 109. If the yarn guide drum 15 is replaced with the friction unit 80 of Fig. 7, then the yarn 2 wrapping around the friction disk 81 is correspondingly carried along and advanced. Replacing the yarn guide drum 15 with the friction unit 80 thus makes it possible to vary the functional principle. The brake module 51 can also be replaced by a non- driven yarn brake module. The yarn feeder 1 can also be refitted by removing the blind cap 41 and replacing it with the arm 46 (Fig. 5). For a modular yarn feeder 1, a basic carrier 3 is a basic component on which additional modules can be secured as needed by suitable coupling devices. This makes the yarn feeder more adaptable to different kinds of use and situations. We Claim 1. A modular yarn feeder (1) for textile machines, comprising - a basic carrier (3) having a fastening device (4) arranged for connection to the textile machine or to a retainer provided on the textile machine; - a shaft (14), pivotably supported on the basic carrier (3), the shaft (14) carrying a yarn guide drum (15) on one end, being connected to a drive device (18) the yam guide drum (15) having at least one yam outlet side; - at least one adjustable yarn guide arrangement (25), assigned with a yarn guide element (93) disposed on the yarn outlet side, characterized in that the yarn guide element is supported on a straight path (W) being adjustable between at least two positions both located bebw the yarn guide drum (15) and in spacings to the rotational axis (D), and in that an oblique draw off of the yarn from the yam guide drum (15) takes place in said at least two positions. 2. The yarn feeder as claimed in claim 1, wherein the yarn guide element (93) is an eyelet. 3. The yarn feeder as claimed in claim 1, wherein the straight path (W) has at least two detent positions which define the at least two positions, and wherein the straight path (W) is inclined relative to a pivot axis (D). 4. The yarn feeder as claimed in claim 1, wherein the yarn guide element (93) is supported adjustably, for instance by a pivotable lever, on a nonlinear path, in which at least two positions are specified. 5. The yarn feeder as claimed in claim 1, wherein the yarn guide element (93) is retahed at a greater spacing from the pivot axis (D) in one of the at least two positions being in cbse spacing below the rim of the yarn guide drum (15) and wherein the guide element (93) is retained in closer spacing from the pivot axis (D) in the other of the at least two positions with greater spacing below the rim of the yarn guide drum (15). 6. The yarn feeder as claimed in claim 1, wherein the yarn guide element (93) is supported in a sliding block guide. 7. The yam feeder as claimed in claim 1, comprising a slicing block guide for supporting said guide element (93), said sliding bbck guide having two legs (105) extending away from the yarn guide element and yielding movement toward and away from one another, and said basic carrier (3) being formed with a pocket for engagement by said legs (105). 8. The yarn feeder as claimed in claim 1, wherein the yarn is scanned by a yarn feeler lever (101) while traveling through the adjustable yarn guide element (93), the yarn feeler lever (101) being connected to a sensor or a switching device. 9. The yarn feeder as claimed in claim 8, wherein the switching device has a fixed switching point, which is independent of the position of the yarn guide element (93), and wherein the rated position of the yarn feeler lever (101) is substantially the same in each position of the yarn guide element (93). 10. The yarn feeder as claimed in claim 1, wherein at least one coupling device (25) for fastening at least one additional module is disposed on the basic carrier (3) between the fastening device (4) and the shaft (14). 11. The yarn feeder as claimed in claim 10, wherein the coupling device (25) comprises a guide device (28) having a guide body and a chucking device (36, 38) and wherein the guide body (28) can be deformed by means of the guide device (28) for firmly cramping a counterpart (46a). 12. The yarn feeder as claimed in claim 1, wherein the at least one additional module (46) is a retainer, on which a plurality of elements (49) secured, preferably separably. 13. The yarn feeder as claimed in claim 1, wherein the coupling device (25) is assigned a blind cap (41), in order to cover the device (25) when not in use. 14. The yarn feeder as claimed in claim 1, wherein the at least one additional module is a yarn brake (51). 15. The yarn feeder as claimed in claim 1, wherein the yarn brake (51) has a base (52), which has two portions (56, 57) joined to one another via a film hinge (54) and fastenable on one another by clamping or detent means (58, 59). 16. The yarn feeder as claimed in claim 1, wherein a cytndrical or conical extension is embodied on the basic carrier, concentrically with the shaft (14), and serves as a coupling device for a friction module, and wherein the yarn drum (15) is separably connected to the shaft (14) being replaceable with a friction module (80). 17. The yarn feeder as claimed to claim 1, wherein a cover hood (79) is provided between the basic carrier (3) and the yarn guide drum (15) and fits over the yarn guide drum on its rim. A modular yarn feeder (1) for textile machines, comprising - a basic carrier (3) having a fastening device (4) arranged for connection to the textile machine or to a retainer provided on the textile machine; - a shaft (14), pivotably supported on the basic carrier (3), the shift (14) carrying a yam guide dram ( 15) on one end, being connected to a drive device (18) the yarn guide drum (15) having at least one yam outlet side; - at least one adjustable yam guide arrangement (25), assigned with a yarn guide element (93) disposed on the yarn outlet side, the yam guide element is supported on a straight path (W) being adjustable between at least two positions both located below the yarm guide drum (15) and in spacings to the rotational axis (D), and in that an oblique draw off of the yarn from the yam guide drum (15) takes place in said at least two positions.

Documents:

in-pct-2002-36-kol-granted-abstract.pdf

in-pct-2002-36-kol-granted-claims.pdf

in-pct-2002-36-kol-granted-correspondence.pdf

in-pct-2002-36-kol-granted-description (complete).pdf

in-pct-2002-36-kol-granted-drawings.pdf

in-pct-2002-36-kol-granted-examination report.pdf

in-pct-2002-36-kol-granted-form 1.pdf

in-pct-2002-36-kol-granted-form 18.pdf

in-pct-2002-36-kol-granted-form 2.pdf

in-pct-2002-36-kol-granted-form 3.pdf

in-pct-2002-36-kol-granted-form 5.pdf

in-pct-2002-36-kol-granted-letter patent.pdf

in-pct-2002-36-kol-granted-pa.pdf

in-pct-2002-36-kol-granted-priority document.pdf

in-pct-2002-36-kol-granted-reply to examination report.pdf

in-pct-2002-36-kol-granted-specification.pdf