Image forming apparatus

A method for an image forming apparatus having a photosensitive member that is rotatable and configured to bear a toner image, a transfer member configured to perform a transfer of the toner image borne on the photosensitive member onto a recording material, a power supply configured to apply a voltage for the performed transfer to the transfer member, and a conveyance unit configured to convey the recording material to a transfer portion where the transfer member opposes the photosensitive member, the method comprising:

• changing, in a case where an image is successively formed on a first recording material and a second recording material conveyed to the transfer portion following the first recording material, a time interval to a first interval or a second interval based on predetermined information concerning the transfer onto the first recording material,
• wherein the first recording material has a first width in a width direction perpendicular to a conveyance direction of the recording material and the second recording material has a second width greater than the first width in the width direction,
• wherein the time interval is an interval between a time when a trailing edge of the first recording material in the conveyance direction completely passes through the transfer portion and a time when a leading edge in the conveyance direction of the second recording material conveyed to the transfer portion immediately following the first recording material reaches the transfer portion, and
• wherein the first interval is a time period corresponding to a rotation equal to less than one rotation of the photosensitive member and the second interval is a time period corresponding to a rotation equal to one rotation or more than one rotation of the photosensitive member.

A non-transitory computer-readable storage medium storing a program to cause a computer to perform a method for an image forming apparatus having a photosensitive member that is rotatable and configured to bear a toner image, a transfer member configured to perform a transfer of the toner image borne on the photosensitive member onto a recording material, a power supply configured to apply a voltage for the performed transfer to the transfer member, and a conveyance unit configured to convey the recording material to a transfer portion where the transfer member opposes the photosensitive member, the method comprising:

• changing, in a case where an image is successively formed on a first recording material and a second recording material conveyed to the transfer portion following the first recording material, a time interval to a first interval or a second interval based on predetermined information concerning the transfer onto the first recording material,
• wherein the first recording material has a first width in a width direction perpendicular to a conveyance direction of the recording material and the second recording material has a second width greater than the first width in the width direction,
• wherein the time interval is an interval between a time when a trailing edge of the first recording material in the conveyance direction completely passes through the transfer portion and a time when a leading edge in the conveyance direction of the second recording material conveyed to the transfer portion immediately following the first recording material reaches the transfer portion, and
• wherein the first interval is a time period corresponding to a rotation equal to less than one rotation of the photosensitive member and the second interval is a time period corresponding to a rotation equal to one rotation or more than one rotation of the photosensitive member.