COLLECTING APPARATUS

摘要

A collecting apparatus having a nozzle through which air is released to form a jet flow, a restriction provided at a position spaced from the nozzle in the direction of the jet flow and a vacuum sleeve defining a large vacuum space between the nozzle and the restriction. A collecting tube is connected to the vacuum sleeve to open to the vacuum space. A high vacuum is established in the vacuum space so that large dust particles are sucked through the collecting tube and collected in a collecting bag attached to the restriction or scattered through the restriction.