Device for concentrically transporting documents through passageway

A device for concentrically transporting documents, comprising:

• a pair of opposed rotators mounted on the opposite sides of a passageway for their rotation and movement in the transverse direction to a longitudinal direction of the passageway,
• a drive motor for rotating the rotators in the counter directions at the same rate of rotation,
• a centering motor for moving the rotators in the transverse direction to a longitudinal direction of the passageway,
• an intake finish sensor for detecting a leading edge of a document moved to the rear of the passageway, and
• a validation sensor for converting physical features of the document into electric detection signals,
• wherein after the intake finish sensor detects the leading edge of the document, both the drive and centering motors are activated to rotate the pair of the rotators and also to cause the rotators to approach toward each other,
• thereby, the rotators during their rotation are bought into contact to and grasp both side edges of the document to bring a center line of the document into alignment with a center line of the passageway, and to flick the document in the tangential direction of the outer periphery in the rotators,
• when the validation sensor detects a leading edge of the document, the centering motor is rotated in the adverse direction to move the rotators away from each other.