Abstract: A sheet feed device includes: a conveyor roller that rotates in a first direction; a separation roller rotatable in a second, reverse to the first direction, that nips a sheet with the conveyor roller; a sheet detector provided at a detecting position to detect a number of sheets; a pressure generator that generates a pressure to press the separation roller against the conveyor roller; a separation torque generator that generates a separation torque to convey the sheet on the separation roller in the second direction; and a controller that, if two or more sheets are detected, applies the pressure and/or the separation torque to the separation roller to separate the sheets until the detected number of sheets is decreased to be one, and that, after the number of sheets becomes one, controls the pressure and/or the separation torque to adjust a position of the sheet on the separation roller to a target position.

Abstract: A data processing apparatus having a construction for guiding a transported medium conveyed from a curved transportation unit enables opening and closing the guide unit. The data processing apparatus 1 has an intermediate roller 39 and guide portion 38 constituting a curved transportation unit 23 inside the printer case 7, and a paper feed roller pair 25 and 26 for nipping and conveying paper P conveyed from the curved transportation unit 23 disposed a specific distance from the curved transportation unit 23. The guide portion 38 has an auxiliary guide member 51 and can move circularly open and closed in unison with an outside wall unit 16. The auxiliary guide member 51 projects toward the paper feed roller pair 25 and 26 and guides the paper P. An auxiliary guide linking mechanism 53 causes the auxiliary guide member 51 to retract away from the paper feed roller pair 25 and 26 in conjunction with the unlocking operation of opening/closing levers 41 and 42.