extent of the conveyor train since as indicated above all of the framework members 14 are identical with the exception of the framework members which contain the drives for chain 44 only one will be discussed in detail the belt training system will be discussed in detail below as can be seen in fig3 the upper portion 32 of each framework member 14 includes left and right conveyor belt support members 100 and 102 support members 100 and 102 are bolted to the side portions 34 and 36 of the bottom portion 30 there exists a generally open area between member 100 and 102 directly above bottom portion 30 a plurality of rollers comprise the means mounted on each framework member 14 for moveably supporting the orbital conveying belt 12 within the open area of the carriage train an upper series of rollers are provided for supporting the upper conveying run portion 12a of the belt 12 and a lower series of rollers are provided for supporting the lower run portion 12b of the belt 12 edge rollers 104 and 106 are mounted on brackets 108 and 109 respectively which are mounted across the bottom portion 30 thereby supporting edge rollers 104 and 106 the brackets 108 109 are attached in any convenient manner.