Image Forming Apparatus

An image forming apparatus comprising:

• a photosensitive drum having a circumferential surface, on which a developer image is formed;
• a transfer member that faces the circumferential surface of the photosensitive drum so as to form a conveying path therebetween, the transfer member configured to transfer the developer image from the circumferential surface of the photosensitive drum to a recording medium conveyed along the conveying path in a conveying direction;
• a collecting member of a roller type, facing the circumferential surface of the photosensitive drum, the collecting member configured to collect any developer remaining on the circumferential surface of the photosensitive drum after the developer image is transferred from the circumferential surface of the photosensitive drum to the recording medium;
• a motor capable of performing a forward rotation and a reverse rotation;
• a driving unit configured to rotate the photosensitive drum in a forward direction based on an output of the motor performing the forward rotation, so that a movement direction of the circumferential surface of the photosensitive drum and the conveying direction of the recording medium are the same, and to rotate the photosensitive drum in a direction opposite to the forward direction based on an output of the motor performing the reverse rotation;
• a forward conveying unit configured to convey the recording medium along the conveying path based on the output of the motor performing the forward rotation;
• and
• a reverse conveying unit configured to convey the recording medium, having the developer image transferred on one face thereof, along a reverse conveying path based on the output of the motor performing the reverse rotation, and to feed the recording medium to the conveying path so that another face of the recording medium faces the circumferential surface of the photosensitive drum,
• wherein, based on a timing when a portion of the circumferential surface of the photosensitive drum faces an upstream side edge of the developer image on the recording medium in the conveying direction, a time elapsed until the motor is stopped to change from performing the forward rotation to the reverse rotation is longer than a time elapsed until the portion of the circumferential surface of the photosensitive drum that faced the upstream side edge of the developer image faces the collecting member.