Patent ID: 7971870
Filing Date: 2011-07-05
Classification: B65H

Abstract:
1. A medium feeding unit, comprising: a supporting frame; a loading plate where print media are loaded; a sensor that comprises a sensing area and outputs sensing signals having different levels corresponding to blocking of the sensing area; a first actuator that rotates with respect to a shaft provided in the supporting frame as a first end part of the first actuator interferes with the print media on the loading plate, and makes a second end part thereof rotate between a first reference position at which a predetermined first region of the sensing area is blocked or opened and a first position moved away from the first reference position; and a second actuator that rotates separately from the first actuator with respect to the shaft as a first end part of the second actuator interferes with the print media that are loaded on to the loading plate more than a predetermined reference remaining number greater than zero, and makes a second end part thereof rotate between a second reference position at which a predetermined second region, different from the first region blocked by the first actuator, of the sensing area is blocked or opened and a second position moved away from the second reference position.