Tsudakoma Kogyo Kabushiki Kaisha

Shigeharu Sawada

Akihiko Nakada

Satoshi Azuma

Kazufumi Yama

Takeshi Satoh

Takeshi Satou

Yoshinobu Tobe

After a picking action of a weaving machine, a cloth-end warp maintains its shed over a plurality of weaving cycles including a weaving cycle in which weft ends are tucked in. Air is jetted toward a shed formed by warps in a widthwise direction of weaving from outside the cloth after the weaving cycle in which the weft ends are tucked in, and at latest before the cloth-end warp unsheds. The air jet energizes the weft ends, tucked in, inside the cloth in the widthwise direction of weaving.

Method of forming tuck-in selvage in cloth

A tuck-in apparatus for producing a fastened tuck-in-selvage includes a tuck-in nozzle for injecting air into a warp shed from the outside of a warp array in order to fold back a weft yarn end toward a cloth fell. A selvage-fastening nozzle is disposed adjacent to the cloth fell outside the warp array for causing the weft yarn end folded back by the tuck-in nozzle to extend along the cloth fell. Timing control is provided to provide a first period of air injection from the tuck-in nozzle and a second period of air injection from the selvage-fastening nozzle so that the beginning of the second period is later than the beginning of the first period, and the second period ends before the warp shed is closed.

Weft selvage tuck-in nozzle injection timing apparatus

A split reed has a weaving reed formed by successively arranging dents respectively provided with recesses forming a weft yarn guide path having a back surface, and an auxiliary reed respectively provided with recesses forming a weft yarn guide path having a back surface. The weaving reed and the auxiliary reed are attached to a slay or the respective dents of the weaving reed and the auxiliary reed are formed so that the back surface of the weft yarn guide path of the auxiliary reed is included in a plane behind a plane including the back surface of the weaving reed with respect to the cloth fell of a fabric on the loom when the weaving reed and the auxiliary reed are attached to the slay.

Split reed including a weaving reed and an auxiliary reed having a non-planar guide path

Compared with the method for performing tuck-in operation at each weaving cycle, the method of the present invention makes it possible to increase the number of revolutions of the loom at high speed, to decrease the number of maintenance operations needed for the tuck-in device and to decrease power consumption. Moreover, compared with the method for performing collective tuck-in operation by bringing all wefts inserted into each repeat together, it is possible to improve external appearance of the selvedge of the pile fabric. According to the tuck-in selvedge setting method in a tuck-in device of a shuttleless loom for towel of the present invention, when a pile fabric is woven, tuck-in operations for ends of a plurality of wefts inserted into one repeat for forming a pile fabric are performed by a plurality of times. And in at least one tuck-in operation among these tuck-in operations, ends of a plurality of wefts are collectively brought together, and the last tuck-in operation is carried out in the weaving cycle of a first weft in the next repeat for forming the pile fabric.

Method for a tuck-in selvedge setting in a tuck-in device of a shuttleless loom for towels

In a selvedge forming device, the operation condition for operating at least one of the selvedge forming elements contributing to the selvedge formation is set in advance in correspondence to a weaving condition, and the selvedge forming device is operated in accordance with the weaving condition and the operating condition as set in advance, while the weaving process goes on.

Method and apparatus for driving selvedge forming device in weaving machine

A tuck-in apparatus for shuttleless loom comprises a nozzle block adapted to be provided in a warp side of a cutter cutting a weft, the nozzle block is formed with a slit opening towards three sides, including a warp side, a warp feed side, and a cutter side. The nozzle block includes a drive nozzle guiding a weft end placed within the slit to a front side along the weft feed direction by air supplied through the drive nozzle and a guide nozzle folding the weft end back into a warp shedding by air supplied through the guide nozzle wherein the slit extends parallel to a warp line and a depth end of the slit is set to come near an extended line from a cloth fell.

Tuck-in apparatus for shuttleless loom

A tuck-in apparatus for a shuttleless loom, for blowing an end portion of a weft into a shed, includes a plurality of nozzles located on a side of the row of warps for jetting air. The plurality of nozzles include: a tuck-in nozzle located in the vicinity of a cloth fell and oriented in substantially parallel with the cloth fell; and at least one auxiliary tuck-in nozzle oriented by an acute angle toward a warp supply side with respect to the cloth fell.

Pneumatic Tuck-in apparatus for shuttleless loom

When mispicking occurs, a weft yarn continuous with a mispicked weft yarn is inserted into the shed of warp yarns in a loop by the jetting of a main picking nozzle and auxiliary picking nozzles. A weft yarn retaining member is positioned in the loop of the weft yarn and the mispicked weft yarn is pulled to be removed from the picking side by way of the weft yarn. Given auxiliary picking nozzles stop jetting when the weft yarn is inserted in a loop so that the tip end of the loop of the inserted weft yarn is limited in the extent to which it moves in the picking direction, and thus does not extend substantially beyond the arriving side of the shed of warp yarns, so as to prevent entanglement thereof with various other members.

Mispicked weft removing method

A faulty weft yarn removing apparatus for a loom, having weft yarn extracting devices disposed on the picking side and receiving side of a fabric, respectively, capable of removing the faulty weft yarns (Y1, Y2) smoothly even when the phenomena of long pick and broken pick both occur. A control circuit determines the long pick or the broken pick when the yarn signals (S1, S2) transmitted from the weft yarn feelers are present, first actuates a weft yarn extracting device disposed on the picking side and if there is a yarn signal (S2) after a specified time passes, actuates the weft yarn extracting device on the receiving side. The weft yarn extracting device is capable of removing the faulty weft yarn (Y1) to the picking side of the fabric and the weft yarn extracting device is capable of removing the faulty weft yarn (Y2) to the receiving side of the fabric.

Growing community of inventors

Kanazawa, Japan

Shigeharu Sawada