machines and equipment including printers and automatic bending machines.FIG. 2 shows an example of such a sheet conveyor 40.The sheet conveyor 40 includes a toothed belt 10, a pair of drive and driven toothed pulleys 41 and a pressure retaining roller 42.A plurality of toothed belts 10 are wrapped around the pair of toothed pulleys 41 at spaced intervals in the axial direction of the toothed pull