Patent ID: 10703599

Abstract:
An image forming apparatus includes a stacking unit for stacking types of envelopes, an image forming unit that forms an image on a conveyed envelope, a rear-end regulating plate, provided on the stacking unit, that regulates a trailing end of the stacked envelope at an upstream side of a conveyance direction, side regulating plates, provided on the stacking unit, that regulate both side ends of the stacked envelope in a perpendicular direction to the conveyance direction, an attachment, removably mounted on the stacking unit, that regulates a trailing end of the stacked envelope, an operation unit that accepts a type of envelope via an instruction by a user, and a controller that determines, based on the type of the accepted envelope, whether the attachment is necessary, and, if it is determined that the attachment is necessary, displays information, on the operation unit, prompting the user to mount the attachment.