{TAIL ~ The door construction} 7 wherein the block of {HEAD ~ resilient material} includes a recess for engagement by the ball bearing 
{ TAIL ~ The door construction } 7 wherein the block of { HEAD ~ resilient material } includes a recess for engagement by the ball bearing
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH