Patent ID: 8699085
Filing Date: 2014-04-15
Classification: G03G

Abstract:
1. An image forming apparatus having a transfer portion which transfers a toner image formed on an image bearing member to a sheet, comprising: an upstream sheet conveying portion provided for the transfer portion upstream in a sheet conveying direction of the sheet; a downstream sheet conveying portion provided for the transfer portion downstream in the sheet conveying direction; a detector which is provided between the transfer portion and the upstream sheet conveying portion or between the transfer portion and the downstream sheet conveying portion, wherein said detector continuously detects one end position of a sheet in a direction perpendicular to a sheet conveying direction; a controller which computes a distortion amount for a toner image transferred by the transfer portion to the sheet based on detection information from the detector; a memory portion which saves the distortion amount for the toner image computed by the controller; and a correction portion which corrects a toner image formed on an image bearing member, wherein, when the controller receives image data for image formation on the sheet, the controller reads the distortion amount for the toner image saved in the memory portion and controls the correction portion so as to correct the toner image formed on the image bearing member based on the distortion amount for the toner image.