A tray housing driving mechanism 18, further comprising a switch engaging {HEAD ~ said first drawer} to terminate {TAIL ~ movement} at an extreme limit of movement of said first drawer 
to terminate
A tray housing driving mechanism 18 , further comprising a switch engaging { HEAD ~ said first drawer } to terminate { TAIL ~ movement } at an extreme limit of movement of said first drawer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH