A PRE-GRADE DRUM SYSTEM AND A METHOD FOR PRE-GRADING OBJECTSBY SIZE

摘要

SORTING APPARATUS FOR SORTING OBJECTS OF VARIABLE SIZES The present disclosure discloses a sorting apparatus and related method for sorting objects of variable sizes, in accordance with one embodiment of the present disclosure. The sorting apparatus a main frame, a plurality of rotating supports, a plurality of circumferential rings, a plurality of elongated elements, a plurality of containers, an object introducing unit and a rotating unit. The circumferential rings and the elongated elements form a tapered drum-like structure which has incremental gaps forming narrow gaps to wider gaps longitudinally. The tapered drum-like structure is supported by the main frame and point contacts of the rotating support which enables vibrations without any external force. The introduction of objects in the tapered drum-like structure causes objects to move therewithin because of rotation and vibration. Objects fall from the tapered drum-like structure when the size of objects is equal to less than wider gaps.