Patent ID: 8025288

Claim:
A conveying device that conveys a recording medium, the conveying device comprising: an aligning member into which a leading edge of the recording medium bumps thereto; and a control unit that changes conveyance speed of the recording medium moving on a conveying path to bump into the aligning member based on thickness or rigidity of the recording medium, wherein when thickness or rigidity of the recording medium is equal to or less than a set value, the conveyance speed of the recording medium immediately before the recording medium bumps into the aligning member is reduced to a speed lower than in comparison to when thickness or rigidity of the recording medium is more than the set value, and after reducing conveyance speed, the conveyance speed is increased to a speed higher than in a case when thickness or rigidity of the recording medium is more than the set value, so as to offset a lag caused by reducing the conveyance speed, and wherein the thickness or rigidity of the recording medium is input by a user via an input unit in an image forming apparatus or obtained from a sensor arranged in the image forming apparatus.