Patent ID: 8573869

Claim:
A label conveyance device that conveys a label sheet having a plurality of labels arrayed with a gap therebetween on a sheet, comprising: a sensor that scans the label sheet and outputs a sensor output value; and a controller that: determines a mode of sensor output values; determines a first sheet position in the label sheet conveyance direction where the sensor output value exceeds a first threshold value that is set according to the mode and used for detecting a part of the sheet between labels, a second sheet position where the sensor output value exceeds a second threshold value that is greater than the first threshold value and is used for detecting a hole in the label sheet, a third sheet position where the sensor output value is less than the second threshold value, and a fourth sheet position where the sensor output value is less than the first threshold value; and determines that the center of a first interval from the first sheet position to the fourth sheet position is the position of a seam in the sheet between labels when the first sheet position and the fourth sheet position are identified and the second sheet position and the third sheet position are not identified, and determines that the center of a second interval from the second sheet position to the third sheet position is the position of a seam in the sheet between labels when the second sheet position and the third sheet position are identified.