Patent 7588246 was granted and assigned to Murata Machinery on September, 2009 by the United States Patent and Trademark Office.
In a paper transportation device, a separation pressure adjusting screw is provided in a transportation device main body under a separating pad holder. One end of a coil spring makes contact with the separation pressure adjusting screw, and another end of the coil spring makes contact with a position located away from a separating pad in the separating pad holder. A screw adjusting hole is provided on the separating pad holder for adjusting a screwed-in amount of the separation pressure adjusting screw from above.