Patent ID: 8931620
Filing Date: 2015-01-13
Classification: B65H,G07F,G07G

Abstract:
1. A medium detecting device comprising: a first conveying path configured to convey a medium in a first direction; a second conveying path configured to convey the medium from the first conveying path to the second conveying path so that the medium is conveyed in a second direction opposite to the first direction; first and second detecting sensors comprising a light emitting element and a light receiving element; and a temporary holding unit configured to receive the medium conveyed from the second conveying path until a rear end of the medium being conveyed in a conveyed direction is detected by the second detecting sensor, the temporary holding unit having a cylindrical shape and the medium being held in a rolled state within the temporary holding unit, wherein the light emitting elements of the first and second detecting sensors irradiate light such that the light intersects the first and second conveying paths, and the presence or absence of the medium is detected based on whether or not the light receiving elements of the first and second detecting sensors receive the light.