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1. (WO1989000621) AUTOMATIC MACHINE FOR LOADING OR UNLOADING SKEINS
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Automatic machine for loading or unloading skeins.

The invention device consists in a new automatizing unit for the loading and unloading operations of yarn in skeins with double squeezing and overturning. This device enables to automatize and integrate the discharq ing , squeezing, upturning, second squeezing and loading operations of the skeins on the drying unit one to another, thus allowing to simplify the operations now very expensive as well as requiring time and labour. The invention device, in fact, enables the automatic and synchronous exe_ cution of the- above mentioned operations, and particularly the double squeezing, with the intermediate overturning between'the two hanks wrin ing operations, enabling to completely squeeze the whole skein surface, which is not performed by the present available machineries allowing only the partial wringing of hanks on which a not wringed length remains in correspondence with the sticks. This does not only imply an energy waste in the drying phase, but also Iirperfect technical dyeing results; in particular, the presence of a water quantity in different portions on the same skein, in the drying phase, implies unchecked phenomena of colour migration and, therefore, the possibility of barrings on the dy_ ed yarn.

The invention device consists of two different machines: a preparatory one for the double squeezing operation and the intermediate upturning of the hanks, and the other unit consisting of a robot for transferr-ing the skeins on the drying unit.

The sticks 1 on which the hanks 2 are suspended, coming from the dyeing machinery, are deposited on the conveying chain 3 of the preparation unit 4. The conveying chain advances and carries the sticks 1 as well as the hanks 2 to the first squeezing assembly 5, where the said hanks are wrung and then reach the unit 6 foreseen for upturning them by alternatively displacing the two sticks and, therefore, completely turning the skeins put on them. This enables to displace the length 25 of the hanks still wet as it was not squeezed durinσ the first pressing phase, the sticks 23 and 24 having prevented this operation. As the chain 3 continues its dragging action, it carries the sticks and hanks, which, have already undergone the upturning operation, to the second squeezing assaribly 7 where the skeins are again pressed also on the length 25. At this stage, the squeezing operation is completely and uniformly performed on all their surface. At the end of the pressing stage, the two sticks 23 and 24, on which, the hank groups 2 were hung, are displaced the one from the other as much as required to widen the skein inside and to allow to the drier arm 12 to be introduced in the subsequent loading operation.

After having carried out the stick displacement and the skein widening operations, the loadin robot 8 takes up the sticks 23 and 24, as well as the hung skeins by means of the four mobile pliers 9 andτ by means of a transferring device 16, carries and introduces the hanks into the arm 12 of the dryer now in charging position 13. After having performed this operation, the loading robot 8 is called back along with the stickes 23 and 24, which are without the hanks now suspended on arm 12 of the drying unit, and are discharged into the underlying container 15 just foreseen for this purpose, to be again used in the dyeing machi nery. The robot 8 returns back to the starting position to repeat the different operations since the beginning and so on with continuous cycle. The above operations are contemporarily carried out in the different parts of the machine so as to have a continuous jet of hanks which enter into one part and get out from the other without any solution of continuity.

An execution form is illustrated in a merely indicative way in the tables 1, 2, 3, 4 and 5. Table 1 is the side view of the whole assembly, while table 2 is a view from above. Table 3 schematically represents the movement succession of the upturning device 6 for the hanks between one squeezing operation and the other, and part 25 is shown which has still remained wet after the first wringing operation. Table 4 schematically represents the movement succession carried out by the robot 8 to shift the sticks 23 and 24, to draw the hanks and transfer them on arm 12 of the drying device and to take the sticks 23 and 24 out frαn the skeins. Table 5 is the perspective view of the whole unit.