Patent ID: 7789483
Filing Date: 2010-09-07
Classification: B41J

Abstract:
1. A carriage driving unit comprising: a toothed driving pulley which is driven to rotate by a motor; a driven pulley which is rotatably supported; a timing belt which is laid around between said toothed driving pulley and said driven pulley; a carriage which is fixed to said timing belt and supported so as to reciprocate via said timing belt driven by the motor; and a regulating projection for regulating displacement of said timing belt; wherein said toothed driving pulley and said driven pulley is disposed on a frame so that a rotating center thereof is substantially vertical with respect to a flat surface; said toothed driving pulley comprises a flange only at a side opposite to the flat surface; said regulating projection is formed so as to protrude from said flat surface toward a side face of said timing belt; and a height position of said regulating projection is higher than a protruding item disposed between said flat surface and the side face of the timing belt.