As FIG 4 shows, the two tensioning cords 23 in the resting position of the head 3 are angled at {HEAD ~ a right angle position} with {TAIL ~ respect} to the part of the round belt 22 that goes around the pulley 11, without the round belt 22 having left the tracking groove 21  
As FIG 4 shows , the two tensioning cords 23 in the resting position of the head 3 are angled at { HEAD ~ a right angle position } with { TAIL ~ respect } to the part of the round belt 22 that goes around the pulley 11 , without the round belt 22 having left the tracking groove 21
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