The flap 2, wherein the cassette supporting means includes a pair of {HEAD ~ ribs} projecting from {TAIL ~ an interior wall} of the cassette, and said mounting end is supported by one of the ribs and said tab portion is supported by the other of said ribs 
projecting from
The flap 2 , wherein the cassette supporting means includes a pair of { HEAD ~ ribs } projecting from { TAIL ~ an interior wall } of the cassette , and said mounting end is supported by one of the ribs and said tab portion is supported by the other of said ribs
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH