Further, because of the pair of levers 14, 14 having independent both ends, the spring forces at both ends are equalized, and so {HEAD ~ the shutter plate} 15 can be moved in {TAIL ~ such a manner} as to automatically eliminate the formation of clearance in the transverse direction 
moved in
Further , because of the pair of levers 14 , 14 having independent both ends , the spring forces at both ends are equalized , and so { HEAD ~ the shutter plate } 15 can be moved in { TAIL ~ such a manner } as to automatically eliminate the formation of clearance in the transverse direction
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH