FR2460876A2 - Manual yarn feed - has a suction jet to pass yarn end to winding sleeve - Google Patents

Abstract

In the hand-operated unit to lead a yarn manually to a winding spool, to build up the yarn reserve for winding, there is a suction jet for the cut yarn end to start the winding. The jet is positioned in relation to the winding roller in a plane which is lower and standing at one side in a geometric vertical, at right angles to the axis of the winding roller close to one end of the roller. There is a hook fixed above the mantle of the winding roller directly behind the spool sleeve. This is held by the spool arms in the lower position, in the same plane to one side in the vertical. The hook has at least one loop to take the yarn section temporarily between the output roller and the jet. The loop lies in the zone directly behind the spool sleeve, as it lies on the winding roller, and above the axis of the sleeve when in position. The system allows a yarn end to be attached to a winding sleeve, easily and rapidly, without the need for a slit or projection on the sleeve to catch the yarn.

Description

 The main patent has described a manual priming device for spools, with formation of a thread reserve, on textile machines equipped with a winding system.

This device essentially comprises: a wire suction nozzle, which sucks the end of the wire intended to form the reserve, and a hook comprising at least one loop for the temporary reception of the wire at the time of the priming operation.

This device makes it possible to start the winding on tubes not fitted with lugs or wire hooking slots, as was generally necessary in the past, and therefore allows the use of simple cardboard winding tubes whose surface rough is enough to entrain the loop of wire which constitutes the first turn of the reel in formation.

The object of this addition certificate is certain improvements to this device making it possible to carry out the priming operations even if the surface of the winding tube has only a low roughness or, if the roughness is different from one tube to another. This gives greater operational safety, whatever the quality of the winding tubes used.

Improvements essentially consist in providing tensioning means adapted to temporarily remove the tension on the part of the wire intended to form the reserve of wire, that is to say the part of the wire comprised between the suction nozzle and the hook loop, said means of detention being put into action fleetingly when the wire reserve begins to form on the tube.

These expansion means can be constituted simply by means for closing the suction nozzle, such as a
shutter, or more simply, with the opera finger
tor temporarily blocking the nozzle orifice.

The invention will be better understood on reading the description
detailed description which follows and the study of the accompanying drawings which show, by way of example, an embodiment of the invention.

Figure 1 is a side view, similar to Figure 1 of the main patent, showing a winding system equipped with a manual priming device according to the invention
Figure 2 is a perspective view showing the phase of the priming operation which was shown in Figure 6 of the main patent.

 In FIG. 1 it can be seen that the suction nozzle 21 can be closed by a tilting shutter 41, such as a rubber ball supported by a stirrup 43, or, for the fugitive closure of the nozzle, by the finger 45 of the operator.

At the phase of the priming operation shown in Figure 2, the wire reserve begins to form on the tube 9, as described in the main patent in connection with Figure 6. The present improvement is aim to facilitate the start of the reserve
This reserve of wire starts and hangs on the tube from the moment when the loop 37 is formed and is taken up by the more or less rough surface of the empty tube 9.

To promote the formation of the loop 37, the wire 20 is relaxed for a short time. To do this, it suffices for the operator to temporarily stop the suction nozzle 21, either with his finger 45, or by tilting the shutter 41.

 By blocking the suction 21, the wire 20 is no longer sucked by the nozzle and expands to form the loop 37. The rotation of the empty tube 9 then takes over the wire loop 37 which is wound on the tube to start the winding. The suction is then opened, and the wire 20, which emerges from the nozzle 21, then forms the reserve of wire, while the wire 10 taken from the guide 4 constitutes the crossed coil.

Thanks to this temporary removal of the tension on the wire 20, the priming occurs in a safe manner.

Claims (5)

1.- Manual device for starting coils, with formation of a wire reserve, according to claim 1 of the main patent, characterized in that it includes tensioning means adapted to temporarily remove the tension exerted by the nozzle d suction on the part of the wire intended to form the wire reserve, said tensioning means being put into action momentarily when the wire reserve begins to form on the winding tube.  2.- Device according to claim 1, characterized in that the aforementioned expansion means comprise an iron member meture the mouth of the suction nozzle. 3.- Device according to claim 2, characterized in that the closure member is constituted by a movable shutter mounted on the nozzle. 4.- Device according to claim 2, characterized in that the mouth of the nozzle is adapted to be closed temporarily by the operator's finger.  5.- A method of using a device according to claim 4, characterized in that, as soon as the priming loop is formed on the winding tube, the operator manually and temporarily closes the mouth of the suction nozzle.