Filter bag

Claim 1

IN A FABRIC FILTER BAG STRUCTURE, THE COMBINATION COMPRISING, A FRONT WALL AND A REAR WALL CONNECTED AT THEIR BOTTOM AND SIDE EDGES AND OPEN AT THE TOP TO PROVIDE A MOUTH, A COVER FLAP OVER SAID MOUTH, SAID FLAP SECURED AT LEAST TO THE REAR WALL AT OPPOSITE SIDE EDGES THEREOF, FIRST SECURING MEANS SECURED TO SAID FLAP AND EXTENDING OUTWARDLY BEYOND EACH OF THE SIDE EDGES THEREOF PROVIDING A PAIR OF TAB MEMBERS, SAID SECURING MEANS HAVING A PLURALITY OF NON-METALLIC SECURING ELEMENTS ON THE SURFACE THEREOF, SECOND SECURING MEANS SECURED TO THE OUTER SURFACE OF THE FRONT AND REAR WALLS OF SAID BAG BELOW AND SPACED FROM THE FIRST SECURING MEANS, SAID SECOND SECURING MEANS HAVING A PLURALITY OF NONMETALLIC SECOND SECURING ELEMENTS ON ITS SURFACE FOR RELEASABLE INTERLOCKING ENGAGEMENT WITH THE SECURING ELEMENTS OF SAID FIRST SECURING MEANS, SAID SECOND SECURING ELEMENTS BEING DISPOSED ON THE FRONT SAID REAR WALLS OF SAID BAG A SUFFICIENT DISTANCE BELOW SAID FIRSTMENTIONED SECURING ELEMENTS TO BE IN ALIGNMENT WITH SAID FIRST MENTIONED SECURING ELEMENTS, SAID FIRST MEMTIONED SECURING ELEMENTS OVERLAPPING SAID SECOND SECURING ELEMENTS WHEN SAID FIRST SECURING MEANS IS FOLDED DOWNWARDLY AND THE SECURING ELEMENTS THEREOF ARE PRESSED INTO CONTACT WITH THE SECOND SECURING ELEMENTS OF SAID SECOND SECURING MEANS ON BOTH THE FRONT AND REAR WALLS OF THE BAG TO PROVIDE A SEAL THEREBETWEEN.