Patent ID: 8059976

Claim:
An image forming apparatus comprising: a sheet containing unit configured to contain sheets; a feeding unit configured to feed a sheet from the sheet containing unit; a detection unit, arranged downstream of the feeding unit, configured to detect presence/absence of the sheet which has been fed by the feeding unit; a conveyance unit configured to convey the sheet fed by the feeding unit; an image forming unit configured to form an image on an image carrier; a transfer unit configured to transfer the image formed on the image carrier onto the sheet conveyed by the conveyance unit; a determination unit configured to determine whether or not the feeding unit successfully feeds the sheet based on a detection result by the detection unit; and a control unit configured to start feeding of the sheet by the feeding unit so that the detection unit detects the presence of the sheet after start of image formation by the image forming unit, and cause the transfer unit to transfer the image formed on the image carrier onto the sheet, in a case that the determination unit determined that the feeding unit has successfully fed the sheet; wherein, in a case that the determination unit determined that the feeding unit has not successfully fed the sheet and in a case that the detection unit does not detect the presence of the sheet within a predetermined time period from the start of the feeding of the sheet by the feeding unit, the control unit is configured to: (a) stop the transfer of the image by the transfer unit, (b) control the feeding unit to retry feeding of the sheet that has not been successfully fed as determined by the determination unit, (c) control the image forming unit not to start formation of an image to be formed on the sheet until the determination unit determines that the feeding unit successfully feeds the sheet by the retry feeding, and (d) stop the sheet fed by the retry feeding at a predetermined position downstream of the detection unit and restart feeding of the sheet fed by the retry feeding at a predetermined timing after the starting of formation of the image.