for supporting and imparting motion to moving plate 510 other means such as those including linear motors are well known in the art accordingly the present invention is not limited to any particular means of supporting or translating moving plate 510 while unloading the tubes rest in unloading area 610 fig6 a substantially flat portion of moving plate 510 in one embodiment of the present invention shown in exploded form in fig7 a rotary disks 530 consist of a substantially flat rigid disk 710 containing three apertures 712 into each aperture 712 a set of three roller bearings 715 are fitted each roller bearing consists of axle 720 and roller 730 rigid disk 710 is supported from below by washer 740 and thrust bearing set 750 each roller bearing set 715 is arranged radially with axles 720 located tangential to the circumference of disk 710 the three sets of roller bearings are spaced equidistantly around the circumference of disk 710 roller bearings 715 enable any object e g a tube placed on top of them to easily slide off in any direction thrust bearing set 740 allows disk 710 to rotate freely around its central axis fig7 b shows the rotation of rotary disk 530 as a whole and the rotation of roller bearings 715 in particular although roller and thrust bearings are described those skilled in the will art.