Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C7/00—Leno or similar shedding mechanisms
  • D03C7/06—Mechanisms having eyed needles for moving warp threads from side to side of other warp threads

Definitions

• Drenerkante for forming a Drenerkante with a thread guide element for the leno thread, which is guided through a frame, and at least one standing thread holder.
• the invention relates to a device for forming a leno edge with a thread guide element for the leno thread, which is guided through a frame, and at least one upright thread holder.
• a device of the type mentioned is known from DE-PS 34 42 204.
• Such a device for forming a leno selvedge can be arranged, for example, on reciprocally moving heald frames, the device consisting of a frame which has a standing thread holder for the standing or warp threads.
• the frame consists essentially of two laterally arranged, U-shaped frame rails, in which the thread guide element is guided on both sides. The drive of the
• Thread guide element can in turn be done by the heald frames.
• This known device is characterized by a considerable width and a high weight. With the current number of revolutions of weaving machines of up to 1000 wefts per minute and more, it is desirable to keep the weight on the heald frames as low as possible, since otherwise extremely high powers are required to drive the heald frames. However, this also means that there are limits to any increase in the number of revolutions of such a machine given the power of the drive motor of a weaving machine and known forces.
• the invention is therefore based on the object of making the above-mentioned device for forming a leno edge easier.
• the frame is designed as a guide member for the thread guide element, the thread guide element having a recess for receiving by the guide member.
• the thread guide element by two side frame rails is guided according to the invention for guiding the thread guide element only a single, designed as a guide member frame through which the thread guide element is detected.
• This inventive design of the device also achieves a smaller width of the device; this means that more devices for forming a leno edge can be arranged side by side, for example on the heald frames of a weaving machine. It is also essential that the weft adenabfall can be reduced by the narrower embodiment of the leno device, since the weft can be cut earlier. Such a device can of course also be used on a Jaquard machine.
• the thread guide element is guided in a braked manner by the device.
• a band is provided which is arranged at least on one side and which, by friction with the thread guide element, enables the thread guide element to be braked on the guide member.
• a particularly advantageous embodiment is characterized in that the thread guide element is guided magnetically braked;
• the thread guide element has a magnet which works together with the band consisting of metal.
• An embodiment is expedient in which a band is provided on both sides of the thread guide element in order to ensure the magnetic braking of the thread guide element.
• the thread guide element has an obliquely running slot.
• a second slot can be provided to form a particularly strong leno edge, which is arranged crosswise to the first slot and forms a pair of slots together with the first slot.
• the thread guide element can have a second pair of slots arranged parallel to the first pair of slots, in which case the recess for receiving the guide member is arranged centrally between the two pairs of slots.
• a pair of slits are furthermore assigned two standing thread holders aligned one above the other and at a distance from one another, each standing thread holder being designed as a needle with an eyelet at the end for receiving the standing thread.
• the formation of the leno edge now takes place in such a way that with the above-mentioned thread guide element, the leno threads are located in the respective slot of the thread guide element at the lower end.
• the leno threads move accordingly in the slot of the thread guide element.
• the respective leno thread crosses from one side of the upper needle to the other side of the lower needle.
• Fig.l shows the entire device in a perspective view
• Fig.2 shows the thread guide element
• Fig.3 shows a view of the
• Thread guiding element according to Fig. 2
• the device shown in Fig.l consists of the two clamping means 1 and 2 for attachment to the heald frames of the loom, and the guide member 3 connecting the two clamping devices 1, 2.
• the thread guide element 4 has a recess 3a for receiving by the guide member? on.
• the metal strips 7, 8 are located on both sides of the needles 5, 6. These metal strips 7, 8, in cooperation with the magnets 9, 10 (FIG. 3) arranged in the thread guide element, control the thread guide element.
• the thread guide element 4 also has two pairs of slots 11, 12, the slots being arranged obliquely and crosswise to one another (FIG. 2). The slots serve to guide the leno threads (not shown).

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=6451848

Family Applications (1)

Country Status (2)

Citations (9)

Family Cites Families (1)

• 1992
  • 1992-02-15 DE DE19924204629 patent/DE4204629C1/de not_active Expired - Fee Related
  • 1992-10-20 WO PCT/DE1992/000876 patent/WO1993016219A1/de active Application Filing

Patent Citations (9)

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