Title of Invention

A FLAT BAR FOR USE IN A CARDING MACHINE

Abstract

A flat bar for use in a cardiag machine, the carding machine having a roller with clothing, the flat bar being for arranging opposite the clothing on the roller, the flat bar comprising: a flat bar support body haviag a width in a running direction of the flat bar and having a recess; a clothing rapport having a first side and an extension that extends away front the first side, the extension extending into the recess and having a width in the running direction of the flat bar that is lets that the width of the clothing sapport; flat bar clothing attached to a second side of the clothing support, the second side being opposite the first side; and at least one fastening element that secures the extension of the cloth tag support in the recess.

Full Text

Device on a Card for Cotton, Chemical Fibres or Similar Items, An Which There is At Least One Cover Rod with a Cover Fitting The invention pertains to a device on a card for cotton, chemical fibres or similar items, in . which there is at least one cover rod with a cover fitting, whereby the cover fitting is fastened on to the cover rod and lies opposite the fitting of a roller, e.g. the drum. In a known device, the cover rod consists of a rear part and a carrier body with a base surface. Against the base surface (fitting support part), stretching in a longitudinal direction, a fitting strip (flexible fitting) is fastened. The fitting strip includes a carrier element consisting of se\eral textile layers, in which several wire hooks (fitting peaks) are fastened. The fitting strip is fixed over the oblong sides of the carrier body by means of two clamps. The clamps enclose with one of their ends the longitudinally directed edge regions of the fitting strip and grip with their other end into recesses of the carrier body. In practice, the clamps are made of meal strips, whose one oblong edge is punched into the textile material. The textile material of the fitting strip is fastened in a positive fit during assembly on to the carrier body of the cover rod under high stress. The clamps thereby exercise tensile forces in such a way, that the textile material gets deformed in a ball shape away from the base surface, so that even the fitting peaks are arranged in an undesirable manner outwards on a convex shaped envelope. The cover set thus produced has in unused condition a precision of 0.05 mm in height and evenness. Through usage, the height differences in the set get enlarged to approx. 0.2 mm. By post-sharpening the fitting on the machine, the precision is improved marginally. After approx. 400t of fibre material throughput, the cover fitting is so worn out that it has to be replaced. In order to dismantle the metal clamps, the cover rod is chucked. With the help of a lever and pincers the positive fit is released. The significant forces during assembly and during dismantling work disadvantageously on the shape stability of the cover rod. Additionally, undesired tolerances occur during production of the cover rod body. The memioned disadvantages have the result, that the fitting peak of the clothed cover rod has to be overground (levelled). It has already been suggested (EP 0 887 445) that the fitting strip is fastened on to a beam, e.g. against a steel band sole. The even steel band sole is introduced between guide grooves opening inwards in the edge regions of the base portion of the cover rod (profile), whereby the fitting strip is fastened on to the cover rod. The production of this cover rod is production- technically and assembly-wise cumbersome. Particularly, it is disturbing that the steel band sole and the guide grooves have to the produced absolutely with precision in order to provide a sufficient retention during operation, which otherwise would make replacement very difficult. It is therefore the task of this invention to create a device of the kind described above, which would avoid the mentioned disadvantages, which would especially allow a shape-stable clothed cover rod in a simple manner and a simpler production of the cover rod and replacement of the fitting strips. As the outer side of the beam and the carrier body of the cover rod are in a positive grip with one another and the beam is fixed in the recess by an additional fastening element, a simple production of clothed cover rod and replacement of the fitting strip is possible. All production tolerances of cover rod, the fitting and during assembly (including dismantling), are eliminated. With the clothed cover rod as per the invention, a summation of the tolerances during assembly and dismantling of the cover fitting, the technologically harmful level- grinding and worsening of the precision during usage is effectively avoided in an advantageous manner. The invention is explained in details below on the basis of design examples with diagram. The following are shown: Fig.1. Schematic side view of a card with the device as per invention; Fig.2 clothed cover rods, cutout from a slide groove and a flexible arc and a distance between fitting of the cover rods and drum fitting; Fig.3a side view in section of a cover rod with oblong holes, openings, holes and oblong groove in the bearing body; Fig.3b a threaded pin; Fig 3c side view of the beam; Fig.3d side view in section through a fitting strip; Fig.4 the cover rod with the device as per the invention and a compensation layer in combined condition; Fig.5 a design form of the beam with two attachments and the carrier body with two oblong grooves; and Fig.6a, 6b side view (fig. 6a) and partly top view in section (fig. 6b) of a further design form of the device as per the invention with a unit for alignment of the cover rod for applying the compensation layer. Fig. 1 shows a card, e.g. Triitzschler high efficiency card DK 903, with feed roller 1, feed table 2, lickers 3a, 3b, 3c, drum 4, doffing cylinder 5, stripping roller 6, nip rollers 7, 8, web guide element 9. web funnel 10, draw-off rollers 11, 12, revolving flat 13, clothed cover rods 14, can 15 and can coiler 16. The rotation directions of the rollers are indicated by bent arrows. 'A' denotes the working direction. Fixed carding elements 33 and 34 are arranged lying opposite to the drum fitting 4a. According to fig 2, on each side of a card a flexible arc 17 is fixed sideways on to the machine frame; this arc has several adjusting screws. The flexible arc 17 has a convex outer surface 17a and an underside 17b. Above the flexible arc 17 there is a slide groove 20, e.g. made of slidable synthetic substance, which has a convex surface 20a and a concave inner surface 20b. The concave inner surface 20b lies on the convex outer surface 17a, and can slide on it in the direction of the arrows B, C. Each cover rod, which can be designed according to the document EP 0 567 747 A1, consists of a rear part 14a and a carrier body 14b. The carrier body 14b has a base surface 14c, two side surfaces 14d, 14e and two upper surfaces 14f, 14g (see fig. 3). Each cover rod 14 has against both its ends respectively a cover rod 14', 14" (see fig. 7b), which respectively encloses two steel pins 141, 142 or 143, 144, which are fastened with a part in axial direction (see length 1 in fig. 7b) in recesses 13a, 13b (see fig 7b) of the carrier body 14b, e.g. glued in. The portions of the steel pins 141, 142 (see fig. 7b) protruding over the front surfaces of the carrier body 14b slide on the convex outer surface 20a of the slide groove 20 in the direction of the arrow D. Against the underface of the carrier body 14b, the fitting strip 18 is attached. The peak circle of the cover fittings 19 is denoted by 21. The drum 4 has on its circumference a drum fitting 4a, e.g. saw-tooth fitting. The peak circle of the drum fitting 4a is denoted by 22. The distance between the peak circle 21 and the peak circle 22 is denoted by 'a' and is, for example, 3/1000". The distance between the convex outer surface 20a and the peak circle 22 is denoted by 'b'. The distance between the convex outer surface 20a and the peak circle 21 is denoted by 'c'. The radius of the convex outer surface 20a is denoted by r1 and the radius of the peak circle 22 is denoted by r2. The radii r1 and r2 intersect at the centre point M of the drum 4. According to fig. 3a, in the carrier body 14b of the cover rod 14 which is extruded from aluminium, there are two oblong holes 14c and 14d (see fig. 6), which extend over the width and open outwards, which extend towards the centre of the cover rod 14 into hollow cylindrical openings 14f and 14g. In the openings 14f, 14g, the respective fastening region of the cover pins 141, 142, 143, 144, are shown. In the centre of the cover rod 14 there is an oblong groove 141 Stretching over the width, which is open towards the base surface 14c. Between the ope.ng of 14c and the oblong groove 14i there are several continuous holes 14h vertical to the oblong groove. The holes 14h have an inner threading which grips into the outer threading of threaded pins 28 as shown in fig. 3b. The beam 26 as shown in fig. 3c consists of two metal strips 26a, 26b whose respective end regions are bent rectangular in same direction, i.e. metal strips 26a in anti-clockwise direction and metal strip 26b in clockwise direction. The bent region 26' and 26" of the metal strips 26a or 26b are fastened on to one another by laser welding and hence form an extension 26c which is fastened in the oblong groove 14i (fig. 3a). The bent regions 26III and 26Iv serve the purpose of additionally holding the carrier element 23 of the sliding strip 18 (fig. 3d). According to fig. 3d, the fitting strip 18 consists of fitting peaks 19 (wire hooks) and a carrier element 23 made of textile material The strength of the carrier element 23 is denoted by f. The wire hooks 19 are fastened with one of their ends through the surface 26" in the carrier element 23 The other end of the wire hooks 19, the fitting peaks, are free. Fig. 4 shows the cover rod 14 according to figures 3a to id in combined condition. The fitting strip 18 is fixed on one side 261 of the beam 26, e.g. by gluing, and the extension 26c of the beam 26 is arranged pushed into the oblong groove 14i of the carrier body 14b, so that the other side 262 (outer side) of the beam 26 and the carrier body 14b grip each other in a positive grip. The screwed-in threaded pins 28 (see fig. 6a, 6b) stress the extension 26c against the inner wail of the oblong groove 14i lying opposite to the threaded pin 28, whereby the beam 26 is fastened on to the cover rod 14 with the fitting strip 18. In addition to the elements shown in fig. 3a to 3d, according to fig. 4, an intermediate layer 24, e.g. of hardened synthetic resin or similar item, is placed between the inner surface 262 of the beam and the carrier element 23. The compensation layer 24 can compensate varying distances between cover rod 14, namely the base surface 14c and the cover fitting 19, namely the covering ends of the free peaks. According to fig 5, two oblong grooves 141 and 142 are provided in the carrier body 14b and grip into the two extension 26c1 or 26c2, which are fastened with threaded pins 28a or 28b. The threaded pins 28a and 28b grip through the holes 14h1 or 14h2 from different sides lying opposite to one another. As shown in fig. 6, between the cover pins 141, 142 and an even plate 25 a rectangular support element 27a with parallel and even surfaces is attached, and between the cover pins 143, 144 and the plate 25 a further rectangular support plate 27b of same height h is fixed on the plate 25. With this device and (not shown) further side stud elements or similar things (e.g. shiftable bordering surfaces for compensation layer 24 and/or the carrier element 23), the fitting peaks 19 of the fitting strip 18 can be positioned on the plate 25 and the cover rod 14 with the pins 141, 142, 143, 144 can be positioned on the support elements 27a, 27b. Subsequently, the compensation layer 24 is brought in between the beam 26 and carrier element 23. This can be done by casting, spraying, painting, inserting or any other similar method. The doughy compensation layer 24 distributes itself in the intermediate space and fills ii in a compensatory manner. In the version of the invention as shown in figures 6a and 6b, the holes 14h1 and 14h2 - seen in the direction of the length h - are arranged staggered with one another. On opposite sides of the carrier body 14b, there are on top of one another several threaded pins 28a and 28b, which fasten the extension 26c in the oblong groove 14i (see fig. 4). We Claim: 1. A flat bar for use in a carding machine, the claims mask in a having a roller with clothing, the flat bar being for arranging opposite the clothing oa the roller, the flat bar comprising a flat bar support body having a width in a running direction of the flat bar and htviag a recess; a clothing rapport haviag a first tide aad aa extension that extends away from the first side, the extension extending into the recess and having a width in the running direction of the flat bar that is less than the width of the clothing support; flat bar clothing attached to a second side of the clothing support, the second side being opposite the first side; and at least one fastening element that secures the extension of the clothing support in the recess. 2. The flat bar as claimed in claim 1, wherein the extension is at a right angle to the second side. 3. The flat bar as claimed in claim 1, wherein the clothing snpport is made of sheet metal. 4. The flat bar as claimed in claim 1, wherein the clothing rapport further comprises a bent section for holding the flat bar clothing 5. The flat bar as claimed in claim 1, whereat the clothing snpport comprises two angled sheet-metal strips, each strip having an extension, and the extensions are attached to each other. 6. The flat bar as claimed in claim 1, wherein the flat bar rapport body has two recesses. 7 The flat bar as claimed in claim 1, wherein the recess is provided in the center of the flat bar snpport body. 8. The flat bar as claimed in claim 1, wherein the recent is a groove that is open on one side. 9. The flat bar as claimed in claim 1, wherein the recess extends entire length of the flat bar support body. 10. The flat bar as claimed in claim 1, whereat the fastening element is detachable. 11. The flat bar as claimed in claim 10, wherein the fattening element is a screw element. 12. The flat bar at claimed in claim 11, wberem at least one bore is provided in the flat bar rapport body throngh which the screw element extends. 13. The flat bar as claimed in claim 11, wherein the screw element clamps down the extension of the first side of the clothing support. 14. The flat bar as claimed in claim 13, wherein the screw element pushes the extension of the first side of the clothing support against an opposite-arranged aside wall of the recess. 15. The flat bar as claimed in claim 1, wherein the flat bar clothing is a flexible clothing. 16. The flat bar as claimed in claim 15, wherein the flexible clothing comprises a supporting layer and clothing needles. 17. The flat bar as claimed in claim 1, wherein the flat bar clothing is attached to the clothing support by a glue. 18. The flat bar as claimed in claim 1, further comprising an equalizing layer positioned between the clothing support and the flat bar clothing, wherein the equalizing layer compensates for differences in a distance between an underside of the flat bar support body and the flat bar closing such that the flat bar clothing is parallel to a running direction of the flat bar. 19. The flat bar as claimed in claim 1, wherein the first side of the clothing bar support is connected form fittingly to the flat bar support body. 20. A flat bar for use in a carding machine, the carding machine having t roller with clothing, the flat bar being for arranging opposite the clothing on the roller, the flat bar comprising; a flat bar support body having a recess; a clothing sopport having a first side, the first side being positioned in the recess; flat bar clothing attached to a second side of the clothing support, the second side being opposite the first side; and at least one fastening element that secures the first side of the clothing support in the recess, wherein the clothing rapport comprises two angled sheet-metal strips, each strip having an extension, and the extension are attached to each other. 21. A flat bar for use in a carding machine, the carding machine having a roller wife cloth tag, the flat bar being for arranging opposite the clothing on the roller, the flat bar comprising: a flat bar support body having two recesser, a clothing support having a first side, the first side being positioned m the recesses; flat bar clothing attached to a second side of the clothing support, the second side being opposite the first side; and at least one fastening element that secures the first side of the clothing support in the recesses. 22. A flat bar for use in a carding machine, the carding machine having a roller with clothing, the flat bar being for arranging opposite the clothing on the roller, the flat bar comprising a flat bar support body having a recess; a clothing support having a first side, the first side being positioned in the recess; flat bar clothing attached to a second side of the clothing support, the second side being opposite the first side; at least one fastening element that secures the first side of the clothing support in the recess; sad an equalizing layer positioned between the clothing snpport and the flat bar clothing, wherein the equalizing layer compensates for differences in a distance between an underside of the flat bar support body and the flat bar clothing such that the flat bar clothing is parallel to a running direction of the flat bar. A flat bar for use in a cardiag machine, the carding machine having a roller with clothing, the flat bar being for arranging opposite the clothing on the roller, the flat bar comprising: a flat bar support body haviag a width in a running direction of the flat bar and having a recess; a clothing rapport having a first side and an extension that extends away front the first side, the extension extending into the recess and having a width in the running direction of the flat bar that is lets that the width of the clothing sapport; flat bar clothing attached to a second side of the clothing support, the second side being opposite the first side; and at least one fastening element that secures the extension of the cloth tag support in the recess.

Documents:

494-CAL-2002-(13-08-2012)-FORM-27.pdf

494-CAL-2002-FORM 27.pdf

494-CAL-2002-FORM-27-1.pdf

494-cal-2002-granted-abstract.pdf

494-cal-2002-granted-claims.pdf

494-cal-2002-granted-correspondence.pdf

494-cal-2002-granted-description (complete).pdf

494-cal-2002-granted-drawings.pdf

494-cal-2002-granted-examination report.pdf

494-cal-2002-granted-form 1.pdf

494-cal-2002-granted-form 18.pdf

494-cal-2002-granted-form 2.pdf

494-cal-2002-granted-form 26.pdf

494-cal-2002-granted-form 3.pdf

494-cal-2002-granted-form 5.pdf

494-cal-2002-granted-priority document.pdf

494-cal-2002-granted-reply to examination report.pdf

494-cal-2002-granted-specification.pdf

494-cal-2002-granted-translated copy of priority document.pdf