Two levers pivotally mount {TAIL ~ the pressing roller} on a housing which, in turn, is detachably mounted on a support, the housing being extremely flat and bounding a chamber which has {HEAD ~ an open end} 
Two levers pivotally mount { TAIL ~ the pressing roller } on a housing which , in turn , is detachably mounted on a support , the housing being extremely flat and bounding a chamber which has { HEAD ~ an open end }
OTH OTH OTH OTH TAIL 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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD