Abstract: An adaptable dual direction, differential pressure assembly is disclosed. Solenoid valves release controlled bursts of air into a top of a container. A rate of the controlled bursts of air is partially responsive to a pressure differential between atmospheric pressure and that of compressed air in the reservoir. A pleated filter is fitted inside of the container. The pleated filter has an inner wall and an outer wall and has pleatings separated using hot melt glue beads there between. The controlled bursts of air are programmed to be substantially automatically responsive to one or more pressure differentials between an inner wall and an outer wall. In one embodiment, air is drawn from the blower through the pleated filter from the inner wall to the outer wall until a desired pressure differential is achieved.

Abstract: An adaptable dual direction, differential pressure assembly is disclosed. Solenoid valves release controlled bursts of air into a top of a container. A rate of the controlled bursts of air is partially responsive to a pressure differential between atmospheric pressure and that of compressed air in the reservoir. A pleated filter is fitted inside of the container. The pleated filter has an inner wall and an outer wall and has pleatings separated using hot melt glue beads there between. The controlled bursts of air are programmed to be substantially automatically responsive to one or more pressure differentials between an inner wall and an outer wall. In one embodiment, air is drawn from the blower through the pleated filter from the inner wall to the outer wall until a desired pressure differential is achieved.

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