Endless flexible belt for a printing system

A belt system comprising:

• a. a flexible belt;
• and
• b. a support frame guiding and driving the belt, the support frame including two lateral guiding tracks, extending one on each side of the belt, wherein the flexible belt comprises an endless strip which, in use, travels along a continuous path defined by the lateral tracks, wherein formations are provided along the sides of the strip which are capable of engaging with the lateral guiding tracks to place the belt under lateral tension, the lateral tracks further serving to constrain the belt to follow the continuous path, and wherein, each of the lateral guiding tracks is of suitable cross-section to slidably retain the formations on the sides of the belt wherein the support frame comprises at a location to be aligned with an image forming station of a printing system rollers upon which the inner side of the belt passes, when in use, said rollers being adjacent to print bars of the image forming station that overlie the belt, the latter rollers lying in a plane offset from a flat plane passing through the two tracks such that lateral tension in the belt, resulting from engagement of the formations in the tracks, serves to flatten the belt against the surfaces of the rollers.