Screening apparatus has wire portions whose parameters are set different from each other, besides different alignment of wire portions with respect to horizontal region

摘要

The screening apparatus (1) has wire portions (1.1, 1.2) that are arranged one behind the other along longitudinal direction at different alignment with respect to a horizontal region. The wire parameters such as oscillation frequency, oscillation amplitude, oscillation angle and oscillation phase of the wire portions are set different from each other, besides different alignment with respect to the horizontal region.