t and the feed line 3 to achieve these objectives cyclic rotation means have been used for the carousel 2 which can turn the carousel clockwise f as in fig5 or anticlockwise f u2032 as in fig7 the table 22 of the carousel 2 is provided with four threaded holes to carry the pairs of guides 44 44 u2032 and the fixed brackets 23 with the different set ups in fig5 and 7 while the fixed longitudinal walls 7 and the movable ones 7 u2032 of the seats s are set up to be able to rotate 180 u00b0 about a transverse axis to facilitate this correct and different assembly on the associated brackets the slots 24 and 26 first mentioned with reference to fig4 come in useful as for the solution in fig7 provision will be made for the screws 25 and 27 127 to be on the opposite end of said slots the one furthest away from the carousel the fixed walls 7 will be provided with additional holes to support guide 33 and support 37 with a different layout the movable bracket 41 will also be provided with additional holes on its foot to support the body 45 with the.