Patent ID: 9555657
Date: 2017-01-31
CPC Classifications: B41J,B41M,G03G,G06K,H04N

Claim:
1. An erasing apparatus, comprising; an erasing section configured to erase an image formed with an erasable recording agent on a sheet on which the image and a mark are formed, the mark showing if the image formed on the sheet is erasable or not; a sheet storage configured to store the sheet conveyed from the erasing section; a scanner configured to scan the sheet; a conveyer comprising a plurality of motors, and a plurality of conveyance rollers which are configured to be driven by the plurality of motors for conveying sheet, the conveyer configured to convey the sheet; and a control section configured to control the conveyer to convey the sheet scanned by the scanner to the sheet storage without passing through the erasing section in a case where the mark scanned by the scanner shows the image formed on the sheet is not erasable, wherein the control section is configured to determine that the image formed on the sheet is an image formed with a recording agent containing a coloring agent, the color of which cannot be erased by heating, if a given image is not formed in a given area of the sheet, and wherein the control section is configured to determine the color of the sheet and the color of the given image based on threshold values of the color differences which differ according to the color of the sheet.