Patent ID: 9604812
Date: 2017-03-28
CPC Classifications: B65H

Claim:
1. A medium processing apparatus, comprising: a drum that is formed in a substantially circular cylinder shape, and that rotates about a central shaft at the center of the drum; a tape that is wound onto a circumferential side face of the drum together with a paper sheet-shaped medium; a groove portion that is formed around a circumferential direction of the drum; a plurality of bridge portions that span between the two sides of the groove portion at discrete locations around the circumferential direction of the drum; a detection unit that emits detection light toward the groove portion and that receives the detection light that has passed through an opening hole portion that is a gap between the bridge portions in the groove portion; and a controller that determines whether or not the medium is wound onto the circumferential side face of the drum based on a light reception result for the detection light by the detection unit.