PLEATED AIR FILTER WITH REVERSE PULSATING AIR FLOW CLEANING

摘要

An air filter assembly (20) has a pleated filter cartridge for filtering out dust from the air, this unit being fabricated of a suitable paper material. The cartridge (16) is in the form of a receptacle having an open top (16a), a closed bottom (16b) and closed sides (16c) which run entirely there around. Pleats (21) are formed in the sides (16c) of the cartridge. The pleats (21) are separated from each other by an adhesive bead (19) which may be formed from a hot melt material. In the filtering cycle air is drawn out by a blower (15) from the inside of the cartridge thereby drawing air from the outsides through the pleated sides which filter our dirt. The filtered air is fed from the cartridge (16) to an area requiring clean air. Periodically, the filter (16) is automatically cleaned by compressed pulsating air (D) which is fed to the interior of the cartridge (16) drives through the pleated sides (21), thereby blowing off dirt accumulated on the cartridge.