{TAIL ~ The apparatus} 1, wherein said {HEAD ~ biasing} means each comprise at least one torsion spring for biasing the respective attached flap outwardly into its extended position 
{ TAIL ~ The apparatus } 1 , wherein said { HEAD ~ biasing } means each comprise at least one torsion spring for biasing the respective attached flap outwardly into its extended position
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH