Patent ID: 9563829
Date: 2017-02-07
CPC Classifications: B65H,G06K

Claim:
1. An image forming apparatus comprising: an image formation section configured to convey a print sheet and to form an image on the print sheet; an image reading section acquiring an image of a sheet loaded on a document stand and generating image data; a plurality of sheet detection sensors being arranged on the print sheet conveyance path; a CPU; and a storage section storing a program, wherein the CPU performs, in accordance with the program, as a jam detection section, a printing stop section, a resolving operation detection section, a sheet breakage confirmation section, and a stopping release section, the jam detection section detects a sheet jam on the conveyance path based on results of detection by the sheet detection sensors, the printing stop section stops an image formation operation by the image formation section upon the sheet jam detection by the sheet jam detection section, the resolving operation detection section detects completion of an operation of resolving the sheet jam by the user, the sheet breakage confirmation section, upon the detection of the completion of the resolving operation by the resolving operation detection section, requests for loading the sheet, which has been taken out from the conveyance path by the user in the operation of resolving the sheet jam, onto the document stand, and also compares, for the sheet loaded on the document stand, the image data generated by the image reading section after the request for loading the sheet with image data used for printing by the image formation section to judge, when the image data acquired by the image reading section has a lacking portion equal to or larger than a predefined area as compared with the image data used for printing by the image formation section, that there is the lacking portion on the sheet and judge, when the image data acquired by the image reading section has a lacking portion smaller than the predefined area, that there is no lacking portion on the sheet, and the stopping release section, upon judgment by the sheet breakage confirmation section that there is no sheet lacking portion, permits the image formation operation by the image formation section.