The flap 2, wherein the cassette supporting means includes {HEAD ~ a pair} of ribs projecting from an interior wall of {TAIL ~ 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 
The flap 2 , wherein the cassette supporting means includes { HEAD ~ a pair } of ribs projecting from an interior wall of { TAIL ~ 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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH 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