Abstract: A material collecting device such as a hopper, shredder, or enclosed conveyor having an entrance opening for deposit of material into the device, an exit opening for removal of material, and a hood on the device connected with duct means for exhaust of dust particles from the material, the hood being provided with a circumferential passage through which air is drawn into the device for entraining such dust particles, and with coils or rings for removing moisture from the air, the coils being connected with a source of hot fluid or refrigerant for drying the material and/or the air within the device, and being Coanda-shaped if desired for extraction of water from a moving air stream.

Abstract: A materials separating apparatus which comprises a conveyor on which materials to be separated are deposited and conveyed to a hopper mounted on an adjustable platform, a rotary drum air classifier mounted on said platform, and transport mechanism connecting the hopper with the interior of the drum whereby materials may be moved from the hopper to the drum for separation therein, the platform being movable together with the hopper and drum whereby the drum may be positioned at a selected angle of inclination, and the conveyor and hopper being interconnected in a manner whereby the conveyor remains in position for proper deposit of materials in the hopper regardless of the position of the hopper when the platform is moved.