Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
  • D03D47/27—Drive or guide mechanisms for weft inserting
  • D03D47/277—Guide mechanisms
  • D03D47/278—Guide mechanisms for pneumatic looms
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
  • D03D49/60—Construction or operation of slay
  • D03D49/62—Reeds mounted on slay

Definitions

• the invention relates to a reed with a plurality of lamellae arranged in a row next to one another, the ends of which are held in a lower profile to be attached in a drawer beam of a sley and in an upper profile.
• lamellae which have a section with a U-shaped cutout between the lower and the upper section, through which a guide channel for the weft thread is formed.
• the invention has for its object to provide a reed of the type mentioned, which is suitable for high weaving speeds.
• the slats at least in one protruding from the lower profile cut a width of about 6 mm and have a width of about 4 mm in an upper section.
• the invention is based on the knowledge that the cause of the stripes in the fabric occurring at high weaving speeds is in the weaving reeds, which then cause dynamic vibrations of the lamellae. Due to the widening of the slats in the lower section, the slats are relatively stiff, so that the deflection, in particular when a weft thread is struck, and thus the resulting vibrations of the slats.
• the upper, relatively narrow section, which is further away from the axis of rotation of the sley, is light in weight, as a result of which the inertial forces acting on this section of the slats remain correspondingly low due to the reciprocating movement of the sley and the deflections and vibrations dependent thereon .
• the vibrations of the slats are thus limited due to their relatively stiff lower section and their relatively light upper section.
• the front edges of the lower section and the upper section of the slats are at least approximately aligned with a stop edge formed in the region of the cutout. It is thereby achieved that the reed formed with these lamellae can be used as an alternative to a conventional reed without substantial changes to a weaving machine being necessary.
• the lamellae have an edge that is essentially straight between the upper and the lower profile and faces away from the guide channel. This has the advantage that the slats can be placed with this edge when assembling a reed.
• the slats in the section with which they protrude into the lower or upper profile have a wedge-shaped decreasing width, the cross section of the lower and / or upper profile being adapted to this wedge-shaped shape.
• This embodiment of the invention has the advantage that, in particular, the outer contour of the lower profile does not have to be changed compared to conventional reeds, so that it is easily possible to use an inventive reed as an alternative to conventional reeds without having to make any further changes to the weaving machine .
• reeds with relatively wide lamellae with a straight front edge and rear edge can also be formed, which are recommended for weaving at high weaving speeds and / or for weaving heavy fabrics.
• these wide slats can be used without the width of the lower profile having to be changed significantly.
• the same fastening means can also be used, with which reeds with lamellae of different widths can be attached to the same shop beam of a sley.
• FIG. 1 shows a perspective view of a section of a reed according to the invention, mounted on a shop beam,
• FIG. 2 shows a section through the reed of FIG. 1 on a larger scale
• FIG. 7 is a perspective view of a detail of a modified embodiment of a reed according to the invention.
• FIG. 8 shows a cross section through the reed of FIG. 7,
• Fig. 9 is a section similar to Fig. 8 through a modified embodiment
• FIG. 10 shows a section similar to FIG. 8 through a further embodiment of a reed according to the invention.
• the reed 20 shown in FIGS. 1 and 2 has a plurality of slats 21 arranged side by side in a row.
• the slats 21 are provided with a cutout so that they form a guide channel 5 for a weft thread to be inserted.
• the slats 21 are held in their upper and lower end regions by means of connecting spirals 6, 19 at a defined distance from one another and fastened in an upper profile 8 and a lower profile 22.
• the slats 21 are glued into the connecting spirals 6, 19 as well as into the upper profile 8 and the lower profile 22.
• the lower profile 22 is fastened to a loading beam 12 by means of a wedge 23 and screws 11.
• the shutter beam 12 is fastened in a known manner to the shutter shaft of the sley by means of shutter stilts parallel to the shutter shaft.
• the slats 21 have a substantially rectangular lower section 14 which has a width 15 of approximately 6 mm. This is significantly larger than the width of the usual slats, which is of the order of only 4 mm.
• the slats 21 also have a substantially rectangular upper section 16, which has a width of the order of 4 mm. This corresponds to the width of the conventional slats in this section.
• the slats 21 also have a central section 18 which is U-shaped is profiled and which connects to the lower section 14 and the upper section 16.
• the middle section 18 has an edge 24, which represents a connection to the rear edge 25 of the lower section 14 and the rear edge 26 of the upper section 16.
• the middle section 18 is provided on its front side with an upper curved edge 27 which merges into the front edge 13 of the upper section 16. This curved edge 27 merges into the upper edge 29 of the cutout, which form the guide channel 5.
• a curved edge 28 adjoins the front edge 32 of the lower section 14, which merges into the lower edge 30 of the cutouts forming the guide channel 5.
• the slats 21 form in the region of the guide channel 5 a stop edge 31 which lies in a line 33 with the front edge 13 of the upper section 16 and the front edge 32 of the lower section 14.
• the section 14 with a width of about 6 mm has, in addition to the advantages already mentioned at the outset, the advantage that the slats 21 are much stronger in comparison with the conventional slats in the region between the lower profile 22 and the stop edge 31, so that the risk of breakage of the slats 21 is lower in this area.
• the area of the upper section 16 is lengthened in that the curved edge 27 has been shortened. The weight of the slats in the area of this section 16 is thus reduced compared to the conventional slats.
• the center of the stop edge 31, with which weft threads are usually attached to the edge of the goods, is at a distance 34 of approximately 48 mm from the lower end of the slats 21.
• the distance 35 between the lower end and the upper end of the slats 21 is approximately 104 mm. In modified embodiments, this distance can be between approximately 94 mm and 104 mm.
• the slats shown in FIGS. 3 and 4 have the same advantages as the slats according to FIG. 2.
• the lamella 37 according to FIG. 3 has a short straight edge 38 in the upper section 16, which connects to the likewise relatively short, straight edge 25 of the lower section 14 by means of a relatively long, straight edge 39.
• another curved front edge is provided, which is shorter than the edge 28 of the embodiment according to FIG. 2.
• the lamella 41 according to FIG. 4 has an edge 42 above the recess 5, which is longer than the edge 27 according to FIGS. 2 and 3 and corresponds approximately to the edges of conventional lamellae.
• the slats 41 On the back, the slats 41 have a relatively long, straight edge 26 in the section 16 (similar to FIG. 2) and a relatively long, straight edge 43 in the region of the lower section 14. These two are connected in the area above the guide channel by means of a relatively short, also straight edge 44.
• the weight of the slat 41 above the stop edge 31 is somewhat larger than in the embodiment according to FIG. 2 or 3, but the width and thus the strength of the slats 41 between the lower profile 22 and the stop edge 31 is also greater.
• a lamella 45 is shown, which is similar to the lamella 37 of FIG. 3, but the rear edge 46 between the upper end 48 and the lower end 49 of the lamella 45 is a straight line.
• the edge 46 runs at an angle 47 of approximately 1.15 ° to a line 52 which runs parallel to the line 33 which is laid through the front edge 23 of the upper section 16, the front edge 32 of the lower section 14 and the stop edge 31 .
• the lamella 50 shown in FIG. 6 is similar to the lamella 41 according to FIG. 4, but here, too, the rear term edge 51 between the upper end 48 and the lower end 49 of the slats 50 rectilinear.
• the lamellae 45 and 50 In the area of the upper profile, the lamellae 45 and 50 have an approximately rectangular side surface of approximately 4 mm and in the area of the lower profile an essentially rectangular section 14 with a width 15 of the order of 6 mm.
• the lamellae 61 have a rectilinear rear edge 69 starting from the upper section 16. In the area of their front edge they are designed in accordance with the exemplary embodiment according to FIG. 2, so that reference is made to the description thereof.
• the lower section 14 is again divided into two sections 66 and 68, the upper section 68 tapering from the upper edge 63 of the profile 62 to the section 66.
• the lower section 66 has a width 67 of approximately 4 mm.
• a wedge-shaped section 68 within the lower profile 62, which connects the lower section 66 to the part of the section 14 protruding from the lower profile, the section 14 having a width 15 of approximately 6 mm.
• the front edge 65 of this section merges into the curved front edge 28.
• the front edge of the lowermost section 66 runs in a line with the stop edge 31 and the edge 13 of the upper distance.
• the front edge of the lower profile 62 has a distance 70 of approximately 2 mm from this edge. This results in a construction in which the width of the profile 62 is practically identical to the width of a conventional profile.
• the lower profile has a width of about 8 mm, so that the same fasteners as conventional weaving reeds can be used, ie the terminal block 10 and the screws 11 to attach them to a shop beam 12.
• the reed 60 can be used against a conventional weaving leaf can be replaced without changing the stop position of the stop edges of these reeds.
• the lower section 14 of the slats 61 has a width 15 of 6 mm, i.e. the section 14 which protrudes from the upper edge 63 of the lower profile 62, these slats 61 have the same advantages that have already been described for the exemplary embodiments according to FIGS. 2 to 6. On the one hand, the risk of streaks in the fabric at high weaving speeds is reduced, while at the same time the risk of breakage of the slats is reduced.
• the slats 71 of a reed 72 essentially have the shape of the slats 61 of the embodiment according to FIG. 8. However, they differ in the area of the lower section 73, with which they are fastened within a lower profile 76.
• the lower section 73 of the slats 71 has a width in the direction B of about 6 mm in the part protruding from the upper edge 77 of the profile 76.
• the part of the section 73 located within the profile then tapers to a width of approximately 4 mm, the side edges 74, 75 initially having a curvature and transitioning smoothly into a substantially rectangular area in which they have a width of approximately 4 mm .
• the side walls of the lower profile 76 have corresponding contours, so that the lower profile 76 has only outer dimensions that have the outer dimensions of the lower profile of a conventional reed.
• the curved surfaces 74, 75 of the lower section 73 extend approximately over 1/3 of the height of the lower profile 76.
• a reed 80 which likewise has a plurality of lamellae 81 arranged in a row next to one another.
• These slats have a central section which extends with a constant width in the direction B of approximately 6 mm between an upper profile 82 and a lower profile 83.
• the lower end section, with which the slats 81 protrude into the lower profile 83, tapers in a wedge shape, with both side edges 84, 85 extending in a straight line and tapering in the direction A towards the interior of the profile 83.
• the profile 83 has an outer contour which corresponds to the outer contour of the lower profile of a conventional reed, that is to say has a width of approximately 8 mm. This makes it possible to attach this reed 80 instead of a conventional reed in the same shop beam 12 by means of the same fastening means 10, 11.
• the ends of the fins 81 run in a wedge shape towards one another in the direction C, the two side edges 86, 87 of the fins also here
• the slats 81 in the section between the lower edge 88 of the upper profile 82 and the upper edge 89 of the lower profile 83 have an increased width, for example a width of 6 mm, but above all the lower profile 83 but also the upper profile 82 has an outer contour which is not larger than the corresponding profiles for conventional reeds in which the lamellae have a width in the direction B of the order of magnitude of only 4 mm.
• the invention is also applicable to slats with shapes other than the shapes shown. Combinations of the individual embodiments can also be used for the slats and / or for the upper and lower profile. Since it is not important in the area of the upper section to an increase in strength but a reduction in weight is desired, other, and in particular stepped upper profile 'and the upper ends to the blades are provided in this area forms the inner contour.
• the lamellae according to the invention and the reeds made therefrom are suitable for use in air jet looms, rapier looms, water jet looms or weaving machines operated with other liquids, projectile looms, weft weaving looms and other types of looms.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Looms (AREA)

Priority Applications (4)

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Publications (1)

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Cited By (2)

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Citations (4)

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• 1999
  • 1999-06-09 EP EP04017564A patent/EP1500732B1/de not_active Expired - Lifetime
  • 1999-06-09 DE DE59914449T patent/DE59914449D1/de not_active Expired - Lifetime
  • 1999-06-09 EP EP02028178A patent/EP1318220B1/de not_active Expired - Lifetime
  • 1999-06-09 DE DE59910957T patent/DE59910957D1/de not_active Expired - Lifetime
  • 1999-06-09 EP EP99927931A patent/EP1086267B1/de not_active Expired - Lifetime
  • 1999-06-09 WO PCT/EP1999/003976 patent/WO1999064654A1/de not_active Ceased
  • 1999-06-09 US US09/701,578 patent/US6401762B1/en not_active Expired - Lifetime
  • 1999-06-09 JP JP2000553642A patent/JP4553486B2/ja not_active Expired - Lifetime
  • 1999-06-09 DE DE59907557T patent/DE59907557D1/de not_active Expired - Lifetime

Patent Citations (4)

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