Method for piecing fasciated yarn
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsAkira Tanaka, Takahiko Tsunekawa, Kazuo Seiki, Haruyoshi Nakamura
Life of this patent
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Abstract
A method for yarn piecing in a fasciated yarn spinning unit, in which an air nozzle for twisting a fiber bundle to form a fasciated yarn is displaced from the normal spinning position to the threading position where the air nozzle can escape from the front roller pair, whereby a free space is prepared for applying a suction means having a sufficient suction force to reversely thread a yarn to be pieced through the air nozzle.
Claims15
A method for piecing a yarn in a fasciated yarn spinning unit, said unit comprising a drafting means for delivering a fiber bundle and an air nozzle for receiving said delivered fiber bundle and twisting it therein by a vortex to form a fasciated yarn, comprising steps of:
- a1. stopping said delivery of said fiber bundle to said air nozzle;
- a. displacing said air nozzle from a normal spinning position to a threading position such that a space exists in front of an inlet of said air nozzle;
- b. guiding a yarn to be pieced to an outlet of said air nozzle;
- c. applying a suction force through said inlet of said air nozzle to said outlet by a displaceable suction means, whereby the yarn is sucked into said suction means through said air nozzle;
- d. returning said air nozzle from the threading position to the normal spinning position;
- and
- e. resuming the delivery of said fiber bundle to said air nozzle, whereby said fiber bundle and said yarn to be pieced are united.
A method for piecing a yarn in a fasciated yarn spinning unit, said unit comprising a drafting means for delivering a fiber bundle and an air nozzle for receiving said delivered fiber bundle and twisting it therein by a vortex to form a fasciated yarn, comprising steps of:
- a1. stopping said delivery of said fiber bundle to said air nozzle;
- a. displacing said air nozzle from a normal spinning position to a threading position such that a space exists in front of an inlet of said air nozzle;
- b. guiding a yarn to be pieced to an outlet of said air nozzle;
- c. applying a suction force through said inlet of said air nozzle to said outlet by a displaceable suction means, whereby the yarn is sucked into said suction means through said air nozzle;
- d. displacing said suction means away from said inlet of air nozzle so that a portion of the yarn sucked and held in said suction means is exposed in the region between said air nozzle and said suction means;
- e. returning said air nozzle from the threading position to the normal spinning position while guiding the exposed portion of the yarn toward said drafting means;
- and
- f. resuming the delivery of said fiber bundle to said air nozzle, whereby said fiber bundle and said yarn to be pieced are united.
In a fasciated yarn spinning apparatus of the type including drafting means for supplying a fiber bundle and an air nozzle having an outlet and an inlet receiving the supplied fiber bundle, the air nozzle twisting the fiber bundle therein by a vortex to form a fasciated yarn, a device for piecing together yarn comprising:
- a. displacing means for moving said air nozzle between a normal spinning position and a threading position such that a space exists in front of the inlet of said air nozzle;
- and
- b. displaceable suction means for applying a suction force through said inlet of said nozzle to suck the yarn from the outlet of said air nozzle, when said air nozzle is moved to said threading position.
Dependencies are inferred from the claim text.