Abstract: An image forming apparatus includes: a primary transfer section which transfers a toner image formed in an image forming section onto an intermediate transfer belt; a back-up roller arranged on an inner periphery side of the intermediate transfer belt; a secondary transfer roller that is in pressure contact with the back-up roller through the intermediate transfer belt and transfers the toner image from the intermediate transfer belt onto a transfer material while conveying the transfer material; a moving mechanism which moves a position where the secondary transfer roller is in contact with the back-up roller through the intermediate transfer belt; and a controller which controls the moving mechanism based on information relating to a thickness of the transfer material obtained by a thickness information obtaining section.

Abstract: An image forming apparatus includes: a primary transfer section which transfers a toner image formed in an image forming section onto an intermediate transfer belt; a back-up roller arranged on an inner periphery side of the intermediate transfer belt; a secondary transfer roller that is in pressure contact with the back-up roller through the intermediate transfer belt and transfers the toner image from the intermediate transfer belt onto a transfer material while conveying the transfer material; a moving mechanism which moves a position where the secondary transfer roller is in contact with the back-up roller through the intermediate transfer belt; and a controller which controls the moving mechanism based on information relating to a thickness of the transfer material obtained by a thickness information obtaining section.

Abstract: An image forming apparatus to reverse a sheet, includes a branched conveyance path branched from a connection point between an entry and conveyance path and a reversal and conveyance path provided downstream of the entry and conveyance path. When a sheet conveyor feeds the sheet from the entry and conveyance path into the reversal and conveyance path, a controller controls a gate member to be opened on the basis of a detection result of a sensor to detect the sheet until a leading edge of the sheet passes the gate member, switches the gate member to be closed before a trailing edge of the sheet reaches the gate member, subsequently switches a sheet reversing and conveying member to rotate reversely after the trailing edge of the sheet passes the gate member, thereby feeding the sheet into the branched conveyance path.

Abstract: An image forming apparatus to reverse a sheet, includes a branched conveyance path branched from a connection point between an entry and conveyance path and a reversal and conveyance path provided downstream of the entry and conveyance path. When a sheet conveyor feeds the sheet from the entry and conveyance path into the reversal and conveyance path, a controller controls a gate member to be opened on the basis of a detection result of a sensor to detect the sheet until a leading edge of the sheet passes the gate member, switches the gate member to be closed before a trailing edge of the sheet reaches the gate member, subsequently switches a sheet reversing and conveying member to rotate reversely after the trailing edge of the sheet passes the gate member, thereby feeding the sheet into the branched conveyance path.