Patent ID: 8047536

Claim:
An image forming apparatus comprising: a sheet feeding portion accommodating a plurality of sheets as a recording medium, the sheet feeding portion feeding a sheet; a conveyance passage through which the sheet is conveyed inside the apparatus; an image forming portion forming an image on the sheet; a skewing detector disposed in the conveyance passage between the sheet feeding portion and the image forming portion, the skewing detector detecting arrival and departure of the sheet, the skewing detector detecting an amount of skewing of the sheet in the conveyance passage; a storage portion storing data; and a control portion controlling sheet feeding and sheet conveyance, the control portion grasping the amount of skewing of the sheet based on an output of the skewing detector and stopping printing when the amount of skewing is equal to or more than a first predetermined amount stored in the storage portion, wherein, when the amount of skewing grasped by use of the skewing detector is equal to or more than a second predetermined amount stored in the storage portion and smaller than the first predetermined amount but is less than the first predetermined amount, the control portion delays timing of sheet feeding from the sheet feeding portion as compared with when the amount of skewing is less than the second predetermined amount.