A combination 5, wherein said lever and said spring are mounted on said pivot at one axial end of said one roller; wherein said {HEAD ~ mounting means} for mounting said one roller further includes another lever mounted on said housing at {TAIL ~ the other axial end} of said one roller similarly to said lever; and wherein said means for moving said one roller out of said operating position further includes an additional spring connected to said housing and to said additional lever 
A combination 5 , wherein said lever and said spring are mounted on said pivot at one axial end of said one roller ; wherein said { HEAD ~ mounting means } for mounting said one roller further includes another lever mounted on said housing at { TAIL ~ the other axial end } of said one roller similarly to said lever ; and wherein said means for moving said one roller out of said operating position further includes an additional spring connected to said housing and to said additional lever
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH