Image forming apparatus having exposure operation control

An image forming apparatus comprising:

• a photoconductive body;
• an exposure unit configured to perform, for an exposure position on the photoconductive body, an exposure operation of exposing the photoconductive body using image data and forming on the photoconductive body an electrostatic latent image based on the image data;
• a development unit configured to develop with development agent the electrostatic latent image formed on the photoconductive body and form a developer image on the photoconductive body;
• a transfer unit configured to transfer the developer image from the photoconductive body onto the sheet, in a transfer position where the transfer unit faces the photoconductive body across the sheet;
• a feeding unit configured to feed the sheet in a conveyance direction on a conveyance path, toward the transfer position;
• a detector configured to detect the sheet on the conveyance path and disposed in a predetermined position on the conveyance path, the predetermined position being such a position that a conveyance time period required for a trailing end of the sheet to move to the transfer position since the detector detects the trailing end of the sheet is shorter than a transfer time period required for an arbitrary point on the photoconductive body to move from the exposure position for exposing the photoconductive body to the transfer position for transferring the developer image onto the sheet;
• and
• a controller configured to perform:
• an acquiring operation of acquiring an exposure completion time point when the exposure operation using the image data has been completed and a trailing-end detecting time point when the detector has detected the trailing end of the sheet;
• and
• a determining operation of determining whether the developer image would be transferred outside the sheet, based on the exposure completion time point and the trailing-end detecting time point acquired in the acquiring operation, the transfer time period, and the conveyance time period,
• wherein the controller is further configured to, in the determining operation:
• determine whether a first time difference resulting from subtracting the exposure completion time point from the trailing-end detecting time point is shorter than a second time difference resulting from subtracting the conveyance time period from the transfer time period;
• and
• when determining that the first time difference is shorter than the second time difference, determine that the developer image would be transferred outside the sheet.