Patent ID: 9575455
Date: 2017-02-21
CPC Classifications: G03G

Claim:
1. A decoloring device comprising: a decoloring unit configured to decolor an image on a sheet, the image being formed of a decolorable coloring agent; a scanner positioned on an upstream side of the decoloring unit in a sheet transport direction and configured to optically read the sheet and generate image data corresponding to the read sheet; a storage unit configured to store a first jam detection time which is a reference time for determining occurrence of a jam of a sheet in a first transport area of a transport path on an upstream side of an inlet of the decoloring unit in the sheet transport direction, and a second jam detection time which is a reference time for determining occurrence of a jam of a sheet in a second transport area of the transport path on a downstream side of the inlet of the decoloring unit in the sheet transport direction of the inlet of the de-coloring unit, the second jam detection time being longer than the first jam detection time, wherein the first jam detection time and the second jam detection time are defined for each of a plurality of types of sheets; a first sensor configured to detect a sheet being transported in the first transport area; a second sensor configured to detect a sheet being transported in the second transport area; a jam determination unit configured to determine occurrence of a jam of a sheet in the first transport area based on a duration of a detection of the sheet by the first sensor compared to the first jam detection time, and determine occurrence of a jam of a sheet in the second transport area based on a duration of a detection of the sheet by the second sensor compared to the second jam detection time; and a sheet type determination unit configured to determine a type of a sheet transported on the transport path, and output a determination result to the jam determination unit.