Bag filtering process and apparatus

Claim 1

THE METHOD FOR REMOVING PARTICULATE SOLIDS FROM THE INSIDE WALLS OF AN ELONGATED UPRIGHT INVERTED FILTER BAG, CLOSED AT THE TOP AND FIXED AT BOTH ENDS HOLDING SAME IN LONGITUDINAL TENSION, DEPOSITED THEREON BY FLOWING A GAS-SOLIDS STREAM UPWARDLY INTO SAID BAG, FILTERING SAID GAS, AND PASSING SOLIDS-FREE GAS THRU THE WALLS THEREOF, WHICH COMPRISES SIMULTANEOUSLY VIBRATING THE WALLS OF SAID BAG WITH SONIC TO SUPERSONIC WAVES AND FORCING SOLIDS-FREE GAS FROM THE FILTERING STEP AS BACKPRESSURING GAS THRU SAID WALLS INTO SAID BAG AT NORMALLY COLLAPSING PRESSURE; MECHANICALLLY MAINTAINING A TRANSVERSE SECTION OF SAID WALLS IN EXPANDED CIRCULAR FORM AGAINST SUBSTANTIAL INWARD RADIAL MOVEMENT AT LEAST ONE LEVEL SPACED SUBSTANTIALLY FROM THE TOP AND BOTTOM OF THE BAG SO AS TO PREVENT COLLAPSE OF SAID BAG TO ALLOW GAS TO PASS THRU SUBSTANTIALLY THE ENTIRE AREA OF SAID WALLS, THEREBY CAUSING SAID PARTICULATE SOLIDS TO FALL OFF SAID WALLS; TERMINATING BACKPRESSURING AND IMMEDIATELY REPRESSURING SAID BAG WITH SAID GAS-SOLIDS STREAM SO THAT THE PREVENTING SAID BAG COLLAPSE AVOIDS BAG POPPING WITH ATTENDANT DETERIORATION OF SAID BAG.

Claim 2

THE METHOD FOR REMOVING PARTICULATE SOLIDS FROM THE INSIDE WALLS OF AN ELONGATED UPRIGHT INVERTED FILTER BAG, CLOSED AT THE TOP AND FIXED AT BOTH ENDS HOLDING SAME IN LONGITUDINAL TENSION, DEPOSITED THEREON BY FLOWING A GAS-SOLIDS STREAM UPWARDLY INTO SAID BAG, FILTERING SAID GAS, AND PASSING SOLIDS-FREE GAS THRU THE WALLS THEREOF, WHICH COMPRISES SIMULTANEOUSLY VIBRATING THE WALLS OF SAID BAG WITH SONIC TO SUPERSONIC WAVES AND FORCING SOLIDS-FREE GAS FROM THE FILTERING STEP AS BACKPRESSURING GAS THRU SAID WALLS INTO SAID BAG AT NORMALLY COLLAPSING PRESSURE; MECHANICALLLY MAINTAINING A TRANSVERSE SECTION OF SAID WALLS IN EXPANDED CIRCULAR FORM AGAINST SUBSTANTIAL INWARD RADIAL MOVEMENT AT LEAST ONE LEVEL SPACED SUBSTANTIALLY FROM THE TOP AND BOTTOM OF THE BAG SO AS TO PREVENT COLLAPSE OF SAID BAG TO ALLOW GAS TO PASS THRU SUBSTANTIALLY THE ENTIRE AREA OF SAID WALLS, THEREBY CAUSING SAID PARTICULATE SOLIDS TO FALL OFF SAID WALLS; TERMINATING BACKPRESSURING AND IMMEDIATELY REPRESSURING SAID BAG WITH SAID GAS-SOLIDS STREAM SO THAT THE PREVENTING SAID BAG COLLAPSE AVOIDS BAG POPPING WITH ATTENDANT DETERIORATION OF SAID BAG.