A detection device includes: a transport unit that stops transportation of a medium on which a first image is formed, the transport unit restarting the transportation of the medium toward an image forming unit after the medium has been in a stopped state, the image forming unit forming a second image on the medium; and a detection unit that detects an edge portion of the medium while the medium is in the stopped state.

An image forming apparatus includes an image carrier, a transfer member, a registration roller pair, and a conveyance guide. The conveyance guide includes a first conveyance guide which faces an image-carrier-side surface of the recording medium, and a second conveyance guide which faces a transfer-member-side surface of the recording medium. The second conveyance guide has a main body portion which has a projecting portion which projects toward the first conveyance guide most in a recording-medium conveyance path, and a step portion which is formed adjacent to the projecting portion on a downstream side of the projecting portion, an elastic member which projects toward the first conveyance guide beyond a plane passing through a downstream-side end of the projecting portion and a downstream-side end of the step portion, and a film member which covers the main body portion together with the elastic member.

An image forming apparatus includes an image forming section and a controller. The image forming section selectively forms a first toner image to be printed on transfer paper other than plain paper with use of a toner and forms a second toner image to be printed on the plain paper with use of the toner. The controller controls the image forming section and thereby makes a first area density of the toner in the first toner image and a second area density of the toner in the second toner image differ from each other.

An image forming apparatus includes an image carrier, a transfer member, a registration roller pair, and a conveyance guide. The conveyance guide includes a first conveyance guide which faces an image-carrier-side surface of the recording medium, and a second conveyance guide which faces a transfer-member-side surface of the recording medium. The second conveyance guide has a main body portion which has a projecting portion which projects toward the first conveyance guide most in a recording-medium conveyance path, and a step portion which is formed adjacent to the projecting portion on a downstream side of the projecting portion, an elastic member which projects toward the first conveyance guide beyond a plane passing through a downstream-side end of the projecting portion and a downstream-side end of the step portion, and a film member which covers the main body portion together with the elastic member.

A roller usable in an image fixing device for an electrophotographic image forming apparatus includes a first elastic layer; a second elastic layer provided closer to a center of the roller than the first elastic layer, the second elastic layer having a thermal conductivity in a thickness direction higher than that of the first elastic layer; a third elastic layer provided between the first elastic layer and the second elastic layer, wherein an indentation elastic modulus EIT1 of the first elastic layer, an indentation elastic modulus EIT2 of the second elastic layer, and an indentation elastic modulus of the third elastic layer satisfy E.sub.1T1<E.sub.1T3<E.sub.1T2.

A roller usable in an image fixing device for an electrophotographic image forming apparatus includes a first elastic layer; a second elastic layer provided closer to a center of the roller than the first elastic layer, the second elastic layer having a thermal conductivity in a thickness direction higher than that of the first elastic layer; a third elastic layer provided between the first elastic layer and the second elastic layer, wherein an indentation elastic modulus EIT1 of the first elastic layer, an indentation elastic modulus EIT2 of the second elastic layer, and an indentation elastic modulus of the third elastic layer satisfy E.sub.IT1<E.sub.IT3<I.sub.IT2.

An image forming apparatus includes an image forming section and a controller. The image forming section selectively forms a first toner image to be printed on transfer paper other than plain paper with use of a toner and forms a second toner image to be printed on the plain paper with use of the toner. The controller controls the image forming section and thereby makes a first area density of the toner in the first toner image and a second area density of the toner in the second toner image differ from each other.

An image forming apparatus includes a transfer unit that transfers an image onto an object by making contact with the object; an attachment table to which the object is attached and that changes a height thereof in accordance with force by which the transfer unit makes contact with the object; and a transport unit that transports the attachment table to which the object has been attached along a transport path.

A detection device includes: a transport unit that stops transportation of a medium on which a first image is formed, the transport unit restarting the transportation of the medium toward an image forming unit after the medium has been in a stopped state, the image forming unit forming a second image on the medium; and a detection unit that detects an edge portion of the medium while the medium is in the stopped state.