United States Patent [1113,ss0,444 [721 lnventor Hubert P. Van Mullekom [5 6] References Cited Deurne, North Brabant, Netherlands [21 1 Appl. No. 755,260 UNITED STATES PATENTS [22] Filed Aug. 26, 1968 2,379,824 7/1945 Mummery .................. .. 226/97X [45] Patented May 25, 1971 2,854,059 9/1958 Palmer ...... .. 226/97X [73] Assignee N. V. Machinefabriek L. Te Strake 3,185,400 5/1965 Maxey ....... .. 226/118X Deurne, Netherlands 1,287,172 12/1918 Andrews..... 226/97 [32] Priority Sept. 4, 1967 2,639,487 5/1953 Kelley ........................ .. 226/97 [33] Netherlands Primary Examiner—Richard A. Schacher [31] 6712130 Attorney-Marshall and Yeasting ABSTRACT: This device, which is adapted to be interposed between a device for continuously supplying a thread and a device for intermittently conveying the thread, comprises ?rst [54] DEVICE FOR LOCALIZING AN EXCESS IN and second thread-guiding elements, between which is a space LENGTH IN A THREAD in which an excess in length in the thread can hang down from 3 Claims, 2 Drawing Figs. such elements in the form of a loop. A downward-directed nozzle is arranged adjacent to the ?rst thread-guiding element, [52] U.S. Cl ...................................................... .. 226/97, through which thread enters the loop, for discharging ?uid 226/113, 226/117, 226/118 downward along the descending leg of the loop in order to [51] Int. Cl ....................................................... .. B65h 17/32 place the descending leg under tension so as to prevent the [50] Fieldof Search .......................................... ,. 226/7, 97, loop from tangling. The ascending leg of the loop is relatively 113,118, ll7;242/182--185;28/l.4 free of tension. 3,580,444 1 2 DEVICE FOR LOCALIZING AN EXCESS IN LENGTH IN A parts of the textile machinery will disturb the loop in the THREAD thread. Further it is advantageous that the baffle has been pro vided with lateral projecting sidewalls encompassing the plane BACKGROUND OF THE INVENTION running through the jet and the thread laterally drawn from The invention relates to a device for localizing an excess in 5 the jet, resulting in a limiting of the area in which the loop in length in a thread. the thread can be formed. In textile machinery, particularly in looms in which a thread has to be inserted into the shed by jet action the circumstances BRIEF DESCRIPTION OF THE DRAWINGS are such that a thread which preferably is to be supplied from FIG. 1 shows a diagrammatic perspective view of the device a thread package with a constant velocity and further has to be according to the invention in a first embodiment, and conveyed with a variable speed becomes periodically slack. FIG. 2 shown a front view, partly in section of a device ac Slackening of a running thread in textile machinery can be cording to FIG. 1 in a second embodiment. very dangerous because the thread can become entangled, owing to which the thread cannot be handled anymore. It is al DESCRIPTION OF THE PREFERRED EMBODIMENTS ready known to provide an arrangement in which a thread The device for localizing an excess in length in a thread can runs in front of the mouth of a ?at shaft and the excess in be used in textile machinery in which a thread periodically has length in the thread can be taken up in the shape of a loop in an increased running speed, without subjecting the thread to a this shaft. In such cases use is made of an airstream which runs high tension. Such circumstances occur e.g. in looms in which across the path of the thread, owing to which'the thread is sub 20 a thread is drawn from a thread package, which thread has to jected to a. strong ?utter. To avoid ?uttering of the thread the be inserted as a weft into the shed by jet action. When the jet shaft is adapted as a guide having two opposite walls close leaving a weft-inserting nozzle acts on the thread this thread together between which a loop in the thread can be guided. A must not have a high resistance and the thread is to be sup further drawback of such a device is the need of a relative long plied by a separate supplying device. narrow shaft to keep the thread tensioned in the stream of air. 25 When considering FIG. 1 a thread 1 is drawn from a sta When a considerable excess in length in the thread is to be lo tionary thread package 2. A thread eye 3 has been situated calized consequently the shaft is long and it takes a considera above the thread package 2, which thread eye can be fastened ble amount of time to remove the thread therefrom. to a part of the textile machinery. The provision of a thread eye has the advantage that a thread balloon can be formed SUMMARY OF THE INVENTION 30 when the thread 1 is drawn from the thread package 2 at a The object of the invention is a simple device for localizing high speed. The thread 1 runs from the thread eye 3 to a an excess in length in a thread which makes possible a high thread guide 4. This thread guide 4 is positioned in front of conveying speed of the thread and in which the excess of two conical rollers 5 and 6. The thread runs over a part of the length in the thread can be removed at any time. 35 conical circumferential surface of the roller 5 and is pressed According to the invention this is attained with a device . against‘ same by means of a roller 6. The rollers 5 and 6 are which is characterized by a thread supply and a thread-con driven e.g. by means of a separate driving mechanism or by veying device, between which a jet nozzle for a ?uid with guid means of a rotating shaft of a textile machine upon which the ing elements for the thread has been positioned in such a device according to the invention has been mounted. The manner that the thread running from the supply device enters position of the ‘thread guide 4 can be adjusted in a direction the path of the jet leaving the jet nozzle which thread is to be parallel to the axis of the roller 5, owing to which the drawing laterally drawn from the jet by means of the conveying device. speed of the thread from the thread package and further the When the thread-supplying device is formed by rotating rol supplying speed of the thread to the remaining part of the lers drawing the thread from a thread package only a small jet machinery can be accurately adjusted with a given speed of nozzle is to be placed in the path of the thread which path is 45 rotation of the roller 5 because the circumferential speed of located by the rollers which constitute a thread-guiding ele that part where the thread 1 makes contact with the circum ment, or by a thread guide proper. The thread can be drawn ferential surface of the, roller 5 is a measure for the running laterally out of the jet at any moment and the jet nozzle can be speed of the thread. Consequently a thread-supplying device is continuously operative when the thread-removing device, formed by the rollers 5 and 6. Further the thread 1 runs to a such as that provided in looms e.g. a device for weft inserting thread-removing device which device has been generally in is only periodically operative. As the thread has already a dicated by the reference numeral 7 in FIG. 1. running speed by the action of the thread-supplying device In the embodiment shown in FIG. 1 the thread-removing only a small jet action of the jet nozzle will be sufficient device 7 is adapted as a jet nozzle for a fluid, e.g. air under because the jet leaving the jet nozzle need not be used for con pressure. The jet nozzle is connected to a source 10 of a pres veying the thread. 55 A further advantage of the device according to the inven sure medium, preferably air by means of a line 8 and a control tion is the tension to which the thread between the jet nozzle valve 9 (diagrammatically shown). When now the control and the thread-supplying device is subjected and the supplying valve is controlled e.g. by a part which rotates synchronously with the textile machine in such a manner that at a certain mo device can be situated at a considerable distance from the ment air from the source 10 is admitted to the jet nozzle 7, the device for localizing the excess in length in the thread. 60 A practical embodiment according to the invention is at thread will be ejected from the nozzle 7 e.g. as a weft into a tained in that the jet nozzle has been positioned with respect shed. As soon as the control valve 9 is closed the removing to a guide for the thread in such a manner that the thread leav device for the thread, thus the jet nozzle 7, becomes inopera ing this guide runs parallel to the jet leaving the jet nozzle. The tive whereas the thread—supplying device formed by the rollers provision of such a guide near a jet nozzle is advantageous 65 5 and 6 is still operative. The result of this is an excess in because the thread comes immediately in contact with the jet length of the thread, which excess will be received by the leaving the jet nozzle.