OSCILLATING SCREEN FOR SIZING GRANULAR SOLID MATERIALS PATICULARLY HARD ROCKS OR MINERALS OF CHIP CLEAVAGE

摘要

A screening machine (FIG. 3) having a vibrator constructed so that the striking elements 7 move substantially only vertically. The vibrator comprises springs having crossing elements 2,3 mounted on the frame and connecting member 4. The connecting member 4 can be moved to rotate the striking elements about the crossing point D of the crossing elements, which is disposed substantially in the plane of the spring.