Patent ID: 9280120
Filing Date: 2016-03-08
CPC Classification: B41J,B41M,G03G

Claim Text:
1. A decolorizing apparatus comprising: first and second heating units that are used to decolorize an image using decolorable colorants which are decolorized if heated, the first heating unit heating one surface of a sheet and the second heating unit heating a remaining surface which is opposite to the one surface of the sheet heated using the first heating unit; a first heat source unit that heats the first heating unit, and a second heat source unit that heats the second heating unit; a switching element that supplies electric power to one of the first and second heat source units when being turned on, and supplies electric power to the other of the first and second heat source units when being turned off; and a controller that includes a first mode and a second mode which are set when a first decolorizing process and a second decolorizing process are performed, performs the first decolorizing process on both the surfaces of the sheet by heating the first and second heating units using the first and second heat source units by targeting a first temperature of the second heat source unit in the first mode, and performs the second decolorizing process on one surface of the sheet by heating the first heating unit using the first heat source unit, and heats the second heating unit using the second heat source unit by targeting a second temperature of the second heat source unit which is lower than the first temperature in the second mode, the controller controls the outputs of the first and second heat source units using Pulse Width Modulation control in which the switching element is turned on or off in the first and second modes, the controller simultaneously supplies electric power to the first and second heat source units and controls the first and second heat source units when warming-up is performed.