When sucking ultra-fine power such as toner with a conventional recovery machine or vacuum cleaner, it is unavoidable that the filtration performance is insufficient, the powder is blown out, and foreign matter is mixed into the recovered power. The IX series solves these problems by incorporating a new resin filter and a swirling flow separation mechanism. High collection performance can be obtained because the pore size of filter is several um. Since the filter medium uses an element without a surface treatment layer, which is a special single-layer sintered single-material plastic, impurities are not mixed into the recovered product (powder).