ES357586A1 - Apparatus to treat a thread coil provided of an opening, as well as the resulting thread package. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A method of processing a filled (or partially filled) bobbin 11 having an unwinding end of yarn comprises forming the said end into a bunch 220 and positioning the bunch in the bobbin. On operation, a filled bobbin 11 is supplied to a first station No. 1 having a split shaft 51 for reception of the bobbin, and a gate 55 on which the bobbin rests. An indexing mechanism moves the bobbin in the shaft 51 to the next station No. 2 which is a reserve station. A further indexing step takes the bobbin to the first processing station No. 3. A vacuum tube 71, 72 fits into the split in the shaft 51, the tube 71 being open on this side. The tube 71 communicates with a chamber 62 having an exhaust duct 135. Vacuum is applied to the chamber 62 and the bobbin is rotated by means of a spindle 125 so that the transfer tail and leading end of the yarn are drawn off and sucked down the tube 71 to the chamber 62. The connecting port between the tube 71 and the chamber 62 is closed by a valve 87 and the yarn is drawn across the chamber 62 and a further port below the bobbin. The yarn is clamped by a member 100 and broken by the continuing rotation of the bobbin. The said further port is closed and vacuum applied to the tube 71 via a valve 76. The leading end of the yarn is then drawn up into the tube 71 and along the tube 72 and is cut by means 77 at the valve 76. The valve 76 is closed and vacuum applied via a chamber 206 above the second processing station No. 4. The leading end of the yarn is drawn from the bobbin into the chamber 206 and is massed against a perforated partition 207 in a random loopy manner. An indexing step brings the bobbin to the second processing station No. 4. A gate in the tube 72 immediately above the bobbin at station No. 4 is opened and the bobbin is lifted until it touches the mouth of the chamber 206. A downward blast of air ejects the bunch formed of the leading end of yarn and pushes it into the interior of the bobbin. The next indexing step conveys the bobbin to an inspection station No. 5. A photo-electric cell determines the presence or absence of a bunch 220 in the bobbin and appropriate action is taken i.e. the absence of a bunch causes the gate 55 holding the bobbin to open and the bobbin is dropped down a shoot 244. The next indexing step carries the bobbin with a bunch 220 to a discharge station No. 6. Means for centring the bobbin at stations 3 and 5 are employed. The spindle 125 has inflatable sheaths 136 which grip the bobbin for rotation thereof.