A seat belt retractor has a spool mounted for rotation in the retractor for retraction or pay-out of seat belt webbing depending upon the rotation direction of the spool. A sleep mode is provided for the electronic circuitry to conserve power. An order entry interface is displayed in relation to the chart. The lateral air blowing guide is arranged close to the transfer cylinder and discharges air from the first vane members toward the sheet which is conveyed as the transfer cylinder rotates. An outgoing laser beam directed to indicia for reflection therefrom andor return light reflected from the indicia is focused by the moving prism.