teeth of the second end in the connected condition under no tension application_number US 201415021084 A description fig1 shows a perspective view of a timing belt 1 known from the prior art having connecting elements and in the unmounted condition the connecting elements are screws 2 back panels 3 and inserts 4 the timing belt 1 shown in fig1 is a toothed belt with a first end 5 and a second end 6 the first end 5 of timing belt 1 has two tines 7 and three recesses 8 one of the recesses 8 is arranged between the two tines 7 while the other two recesses 8 are arranged to one side of tines 7 in the same way second end 6 of timing belt 1 has three tines 7 and two recesses 8 wherein the two recesses 8 are arranged between the three tines 7 in the manner shown in fig1 first end 5 and second end 6 of timing belt 1 are shaped so as to complement one another this means that tines 7 of first end 5 fit exactly into recesses 8 on second end 6 in the same way tines 7 of second end 6 fit perfectly in recesses 8 on first end 5 when the two ends 5 and 6 are pushed into one another therefore tines 7 and recesses 8 complement each other perfectly to form a smooth unbroken surface see also fig2 b timing belt 1 has a flat rear side 9 and a.