Respirator filter mounting means

Claim 1

A RESPIRATOR COMPRISING A SUBSTANTIALLY TRIANGULAR FACE PIECE OF FLEXIBLE MATERIAL HAVING AN OPENING IN THE FRONT THEREOF BOUNDED BY AN INTURNED MARGINAL FLANGE INTEGRALLY MOLDED ON SAID FACE PIECE AND SURROUNDING SAID OPENING, A GRILLE PORTION INTEGRAL WITH AND EXTENDING FROM SAID FLANGE, A FILTER SUPPORTED AGAINST SAID FLANGE AND GRILLE TRIANGULAR STRIP HAVING A PLURALITY OF RADIALLY OUTWARDLY EXTENDING TABS, INCLUDING TABS AT SUBSTANTIALLY THE CORNERS OF SAID STRIP OFFSET FORWARDLY OF THE PLANE OF SAID STRIP, AND CROSS STRIPS INTEGRALLY JOINED TO SAID SUBSTANTIALLY TRIANGULAR STRIP, SAID SUBSTANTIALLY TRIANGULAR FACE PIECE INCLUDING A PLURALITY OF INTEGRALLY MOLDED, RADIALLY OUTWARDLY EXTENDING PROJECTIONS AT SUBSTANTIALLY THE CORNERS OF SAID SUBSTANTIALLY TRIANGULAR FACE PIECE CORRESPONDING TO THE POSITIONS OF SAID TABS, EACH PROJECTIN INCLUDING A GROOVE SUBSTANTIALLY IN THE PLANE OF SAID FILTER FOR SNUGLY RECEIVING ONE OF SAID TABS SO AS TO HOLD THE PERIPHERAL PORTION OF SAID FRAME TIGHTLY AGAINST THE PERIPHERAL PORTION OF SAID FILTER WHILE THE LATTER IS HELD TIGHTLY AGAINST SAID FLANGE PORTION TO FORM A DUST-TIGHT SEAL, WHEREBY SAID RESPECTIVE TABS AND PROJECTIONS MAY BE EASILY PULLED APART TO ENABLE QUICK REMOVAL OF SAID FRAME, A HEADBAND STRAP AND HEADBAND ANCHORING MEANS AT THE SIDES OF THE FACE PIECE CONNECTED TO THE ENDS OF SAID HEADBAND STRAP IN A MANNER SO THAT TENSION OF THE HEADBAND WILL FLEX AND PUSH SAID SIDE OF THE FACE PIECE TIGHTLY AGAINST THE CHEEKS OF THE WEARER.