Abstract: A filter apparatus includes a filter housing having a gas treating enclosure portion and a hopper portion disposed below and open to the gas treating enclosure portion. The gas treating enclosure portion encloses a plurality of spaced apart filter cells which are to be filled with granulated gas treating material. The filter cells have open bottoms open to the hopper portion. A gas treating material conveying channel is disposed within and extends across the hopper portion of the housing proximate the bottom thereof. The interior of the channel is open to the interior of the hopper portion only intermittently along the longitudinal sides of the channel. Further, a conveying gas inlet aperture is formed through one wall of the hopper portion opening into the channel at one of its ends, and a gas treating material and conveying gas outlet aperture is formed through the opposite wall of the hopper portion opening into the channel at the other of its ends.

Abstract: A filter material charging apparatus for adding a gas treating material into gas treating cells contained in a filter housing includes an open bottomed gas treating material conveying channel and air evacuation conduits located in the filter housing over the gas treating cells. Air-borne filter material is delivered to the conveying channel from a source outside the filter housing. Baffles are located in the channel to distribute gas treating material over the length and breadth of the filter housing, and into the gas treating cells as the gas treating material exits the channel through its open bottom. The air which carried the filter material into the housing is evacuated from the interior of the filter housing by the air evacuating conduit.

Abstract: A clamping device for removably clamping a unit filter cell in position in a gas flow-through housing against a stationary gas flow-through frame structure includes a filter cell support tray selectively movable toward and away from the gas flow-through frame structure, thus, moving a unit filter cell supported on the tray into and out of contact, respectively, with the flow-through frame structure. The tray is moved through a plurality of pivotable levers which are each pivotably attached at one end to a stationary support and connected between its ends to the filter cell support tray. The levers are caused to pivot by means of bars which are connected to the other ends of the lever and are themselves mounted for selective linear movement along their longitudinal axes. Biasing means structurally associated with the pivotable levers cause a uniform clamping force to be applied by the filter support tray forcing the unit filter cell against the stationary support frame.