Textiles: manufacturing – Thread finishing – Surface modification of running length
Patent
1979-12-11
1983-11-22
Mackey, Robert
Textiles: manufacturing
Thread finishing
Surface modification of running length
28256, 28272, D02G 112, D02G 116
Patent
active
044160410
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns a method and an apparatus for threading in a running thread into a texturing nozzle.
In threading in a thread during the start-up of a draw-texturing machine, the thread is taken manually off a creel bobbin package, i.e. the thread is not supplied continuously. In this process, the thread introduced and inserted manually into the inlet opening of the texturing nozzle is sucked through the texturing nozzle by a suction gun placed onto the thread exit opening of the texturing nozzle and subsequently is transferred to the following elements involved in the texturing process using the suction gun which continually takes up the thread.
The manual method described above is not applicable, however, to such texturing nozzles used on a spin-draw-texturing machine, as on this machine a thread is supplied at the operational speed already right from the start of the machine.
A draw texturing method already is known, in which a running thread is pulled into and through the narrow thread passage duct of an air jet texturing nozzle using a wire loop inserted through the thread passage duct (U.S. Pat. No. 3,837,052). Such threading-in is tedious, as the thread first is to be pulled through the wire loop using two suction guns. Furthermore, the speed of pulling the wire loop through the nozzle is not sufficient at high thread supply speeds, such that threading-in is not effected successfully. The means required for generating the high acceleration of the wire loop are complicated and susceptible to defects. A further disadvantage is seen in the danger of damage to the inside of the texturing nozzle by a bent wire loop.
In order to facilitate insertion of the thread, it has also been proposed such as described in British Pat. No. 1,482,985, to use a nozzle inlet opening with an adjustable width. However, a detachable inside member is required for such an arrangement. Thus, the nozzle inlet is of complicated design and a high degree of manual skill of the operator is required.
It thus is the object of the present invention to create a method and an apparatus in which a continuously supplied thread in most simple and reliable manner is threaded in and pulled through the texturing nozzle and is transferred to the element without any additional member to be provided on the nozzle itself and without pulling through being required.
Briefly, the invention provides a method and apparatus of threading a thread into a texturing nozzle.
The method includes the steps of threading a running thread into a texturing nozzle by manually guiding the thread at a right angle into the immediate vicinity in front of a thread inlet opening of the nozzle and bringing the thread to a cutting device using a mobile suction device. In accordance with the invention, the thread is severed, caught by a suction air stream entering the inlet opening of the nozzle and is guided through the nozzle to a suction device which generates the suction air stream.
In accordance with the method, a plurality of threads may be run separately and may be caught in individual openings of the nozzle for guidance to a common suction device.
The apparatus of the invention comprises a texturing nozzle for texturing a moving thread and which has a thread inlet opening at one end, a suction device for selectively generating a suction air stream within the nozzle, a cutting device for cutting a thread and a mobile suction device for guiding a thread at a right angle in front of the inlet opening of the nozzle and into the cutting device downstream of the nozzle.
The nozzle also includes a thread outlet opening at an opposite end and a plurality of lateral outlet openings between the inlet opening and the outlet opening. Further, the nozzle is movable between a threading-in position with the inlet opening adjacent the cutting device and the outlet opening in communication with the first suction device and a texturing position. In addition, the apparatus includes a closable device which is movable between a closed state forming a sealed duct about th
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patent: 3823450 (1974-07-01), Ankudowicz et al.
patent: 3837052 (1974-09-01), Martin et al.
patent: 4051581 (1977-10-01), Biot et al.
patent: 4073421 (1978-02-01), Reufer
patent: 4240187 (1980-12-01), Herold et al.
patent: 4280260 (1981-07-01), Martin et al.
Conzelmann Gerhard
Gujer Peter
Guldenfels Dieter
Herion Dieter
Knopp Hans
Mackey Robert
Rieter Deutschland GmbH
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