Vibratory sifter with two relatively moving sifting frames - with amplified movements and mass equilibrium in upper region

摘要

Upper part of linearly vibrating sifting machine consists of one or two parts mounted on and parallel to the sifter base of the machine, which are mounted in thrust springs coupled by force fit to the side walls of the machine and inclined at 10-70 deg., pref. 20-45 deg., to the sifter base. The thrust springs are attached to one or both of the frame systems which perform relative vibratory movements. The two neighbouring upper parts of the machine are linked to each other by elastic mats, sheets, or aprons and are movable relative to each other in an interleaved fashion.