Patent ID: 6884193

Claim:
A device ( 32 ) for tensioning at least two length-invariant belts ( 18 , 24 ), comprising: a first belt ( 18 ), wherein the first belt ( 18 ) is guided about a first axis (A), which repeatedly performs an adjusting movement in an adjustment direction (S) that is substantially orthogonal to an axial direction of the first axis (A); and a second belt ( 24 ), wherein the first belt ( 18 ) and the second belt ( 24 ) are guided about a common second axis (B), wherein tensioning directions (V 18 , V 24 ) of the first belt ( 18 ) and of the second belt ( 24 ) in a region of the second axis (B) form a varying angle of between 0° and 180°, wherein the second axis (B) is associated with a spring unit ( 40 ), wherein the spring unit tensions the first belt ( 18 ) and the second belt ( 24 ) and wherein the spring unit ( 40 ), upon an adjusting movement of the first axis (A), permits a compensating movement of the second axis (B) from a plane covered by an axial direction of the second axis (B) with the tensioning direction (V 18 , V 24 ) of the first belt ( 18 ) and of the second belt ( 24 ), respectively, before initiation of the adjusting movement.