Image forming apparatus with movable surface-positioning member

摘要

An image forming apparatus includes an image carrier; an intermediate transfer body; a second-transfer member; a support mechanism that supports the second-transfer member in a second-transfer region; a surface-positioning member that is disposed upstream of the second-transfer member in a transport direction; a determination device that determines whether or not a recording medium is a thin medium; and a controller that, in a case where it is determined that the recording medium is a thin medium, controls the support mechanism so as to move the second-transfer member more upstream in the transport direction than in other cases and controls the position of the surface-positioning member so as to move the second-transfer member in a direction such that an angle between the intermediate transfer body and the second-transfer member on the upstream side becomes larger than in other cases.

主权项

1. An image forming apparatus comprising:
an image forming member configured to form a toner image on an intermediate transfer body;
wherein the intermediate transfer body is configured to form a loop, having an inner surface and an outer surface,wherein the outer surface is configured to carry a toner image, andwherein the intermediate transfer body is configured to transport the toner image in a transporting direction; a transfer member that is configured to contact the outer surface of the intermediate transfer body,
wherein the transfer member is configured to transfer the toner image on the intermediate transfer body to a recording medium; a surface-positioning member that is disposed upstream of the transfer member and downstream of the image forming member in the transporting direction,
wherein the surface-positioning member is configured to contact the inner surface, andwherein the surface-positioning member is movable in a direction that intersects an in-plane direction of the intermediate transfer body; a receiver configured to receive information associated with a thickness or a basis weight of the recording medium; and a controller configured to control a position of the surface-positioning member in response to the received information, wherein the surface-positioning member is movable relative to the transfer member, wherein the controller is configured to, in response to the thickness or the basis weight of the recording medium being less than or equal to a predetermined value, control the surface-positioning member to be moved in a backward direction towards an inside of the loop.