Teijin Seiki Co., Ltd.

Toyo Boseki Kabushiki Kaisha

Shigeru Yamamoto

Shunzo Naito

Takashi Ikeuchi

Tutomu Ogiso

Fumio Tanae

Yuzuru Miyake

Isao Nohara

Hirokazu Matsuoka

Soichi Miyamoto

Norio Yoshinouchi

A draw texturing machine, which is provided with a heater to be set at a temperature higher than a melting point of a yarn to be textured, can be stopped in operation while the yarn is being threaded onto the machine and then re-started. The temperature of the heater is lowered upon stoppage of the machine, the temperature of the heater is detected, and the rotating speeds of rotating members are controlled based on the detected temperature. An effective method is provided by which a draw texturing machine provided with a heater to be set at a temperature higher than a melting point of a yarn to be textured can be stopped and then re-started while the yarn is being threaded.

Draw-texturing machine and method for operating the same

A draw texturing machine comprises a first heater for heating a yarn, a false twisting device for imparting twists to the yarn, and a cooling plate, disposed between the first heater and the false twisting device, for cooling the yarn which has been heated by the first heater and for inhibiting vibration of the yarn so as to allow the yarn to run in a stable manner. The cooling plate is provided with a yarn threading groove member having a bottom portion with which the yarn runs in contact and wall portions connected to the bottom portion to form a concave, downwardly directed opening. The wall portions of the yarn threading groove member are provided with a plurality of holes, and the bottom portion of the yarn threading groove member is provided with no holes.

Cooling plate of a texturing machine

A yarn winding method, which is applicable to a yarn winding device, which is installed in a texturing machine, a draw texturing machine, or a spinning machine, wherein traverse stroke is varied pulsatively, the traverse stroke, number of traverse strokes and winding speed are controlled by separate drive motors which are independent from each other, varying period of the traverse stroke, varying period of the number of traverse strokes and the varying period of the winding speed are basically in synchronism with each other, and at each traverse period, at least one of start points of the varying period of the traverse stroke, of varying period of the number of traverse strokes and of varying period of the winding speed is shifted from the other by a distance within a range of between 0 and 30% of the basic varying period.

Yarn winding method

A false twisting apparatus comprising: a pair of first feed rollers for feeding a yarn to be false twisted; a pair of second feed rollers for feeding a false-twisted yarn; a first heating means and a twisting means whcih are provided between the first and second feed rollers in order to false twist the yarn fed by the first feed rollers; wherein first and second stabilizing means for cooling and stabilizing the yarn heated by the first heating means are arranged between the first heating means and the twisting means in the recited order; the first stabilizing means being arranged substantially aligned with the first heating means; an interior angle defined between the first and second stabilizing means and inside the apparatus being more than 90.degree.; and the length of the second stabilizing means being shorter than that of the first stabilizing means.

False twister

A method for winding a cross-wound package comprising, while shoulders of the packages are leveled, turning one of traverse ends at a traverse speed of zero, accelerating rapidly to a predetermined traverse speed, traveling to the other traverse end at the predetermined traverse speed, decelerating rapidly at a position just before the other traverse end, and turning the other traverse end at a traverse speed of zero, characterized in that a rate of change of the traverse speed is changed at least once during changing operation between the traverse speed of zero and the predetermined traverse speed.

Method for winding a cross-wound package

In a yarn take-up device in which a continuous yarn is to be helically wound on a rotating bobbin and traversed alternately in opposite directions parallel with the axis of rotation of the bobbin, a method of winding the yarn on the bobbin, comprising producing signals to control the traverse velocity of the yarn to periodically vary between predetermined minimum and maximum limits and signals to control the traverse distance of the yarn to periodically and continuously vary between predetermined maximum and minimum limits, the cycles of the periodic variation of the traverse velocity being respectively identical with the cycles of the periodic variation of the traverse distance, the maximum limits of the traverse velocity appearing in synchronism with the minimum limits of the traverse distance and the minimum limits of the traverse velocity appearing in synchronism with the maximum limits of the traverse distance.

Growing community of inventors

Matsuyama, Japan

Shigeru Yamamoto