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