A collector that utilizes a fabric or cloth to remove dust particles from the air. The basic idea is the same as that employed in vacuum cleaners, but there is usually an automatic or self-cleaning feature for recovering the dust. Fabric-type dust collectors should not be subjected to excessively abrasive or corrosive materials, or high temperatures that might injure the fabric, unless special materials have been employed for that purpose. Bags and tubes employing glass filter fabric are capable of handling gases with temperatures up to 550 degrees F (288 degrees C), and also can withstand the action of many corrosive gases. Fabric-type collectors fall into two groups on the basis of design. One uses the fabric in a closed bag or a series of small-diameter bags commonly called tubes, while the other has the fabric on a frame like a screen.