Filter Insert

FIG. 1 is a perspective view of a filter insert embodying the invention. FIG. 2 is a front view of the filter insert of FIG. 1 . FIG. 3 is a rear view of the filter insert of FIG. 1 . FIG. 4 is a first side view of the filter insert of FIG. 1 . FIG. 5 is a second side view of the filter insert of FIG. 1 . FIG. 6 is a top view of the filter insert of FIG. 1 . FIG. 7 is a bottom view of the filter insert of FIG. 1 . FIG. 8 is a perspective view of another filter insert embodying the invention. FIG. 9 is a front view of the filter insert of FIG. 8 . FIG. 10 is a rear view of the filter insert of FIG. 8 . FIG. 11 is a first side view of the filter insert of FIG. 8 . FIG. 12 is a second side view of the filter insert of FIG. 8 . FIG. 13 is a top view of the filter insert of FIG. 8 . FIG. 14 is a bottom view of the filter insert of FIG. 8 . FIG. 15 is a perspective view of another filter insert embodying the invention. FIG. 16 is a front view of the filter insert of FIG. 15 . FIG. 17 is a rear view of the filter insert of FIG. 15 . FIG. 18 is a first side view of the filter insert of FIG. 15 . FIG. 19 is a second side view of the filter insert of FIG. 15 . FIG. 20 is a top view of the filter insert of FIG. 15 . FIG. 21 is a bottom view of the filter insert of FIG. 15 . FIG. 22 is a perspective view of another filter insert embodying the invention. FIG. 23 is a front view of the filter insert of FIG. 22 . FIG. 24 is a rear view of the filter insert of FIG. 22 . FIG. 25 is a first side view of the filter insert of FIG. 22 . FIG. 26 is a second side view of the filter insert of FIG. 22 . FIG. 27 is a top view of the filter insert of FIG. 22 ; and, FIG. 28 is a bottom view of the filter insert of FIG. 22 .