An image forming apparatus includes: an annular formation target body to be transported; a change roller that is in contact with an inner peripheral surface of the formation target body so as to be rotatable around a rotation axis and that is capable of changing an angle of the rotation axis with respect to a width direction of the formation target body; multiple first image forming bodies that are arranged at a first distance from each other along the formation target body on an upstream side of the change roller in a transport direction of the formation target body, and that form images on the formation target body; and multiple second image forming bodies that are arranged at a second distance smaller than the first distance from each other along the formation target body on a downstream side of the change roller in the transport direction of the formation target body, and that form images on the formation target body.

An imaging system includes a housing that defines a housing space, a fuser disposed inside the housing space to fix a toner image onto a print medium, a collecting device including an ionizer and a particle filter, and a controller. The fuser is associated with operation history information. The ionizer of the collecting device includes a first electrode and a second electrode. The ionizer generates a discharge between the first electrode and the second electrode so as to charge floating particles that are discharged from the fuser. The particle filter of the collecting device collects the charged floating particles. The controller controls a current to flow between the first electrode and the second electrode due to the discharging, based on the operation history information of the fuser.

A cylinder member includes: a cylinder body having a cross section and including a dent portion; a sheet member wrapped around the cylinder body and including a metal layer contacting the cylinder body and an outer layer; a first attachment member on a sheet member first end portion and removably attached to the dent portion; a second attachment member on a metal layer end portion protruding from the outer layer in the circumferential direction at a sheet member second end portion, the second attachment member being removably attached to the dent portion; a tension-applying mechanism pulling the second attachment member in a dent portion depth direction to apply tension to the metal layer; a projection on one of the second attachment member and metal layer end portion; and a fitting portion on other one of the second attachment member and the metal layer end portion and fitted to the projection.

An imaging system includes a housing that defines a housing space, a fuser disposed inside the housing space to fix a toner image onto a print medium, a collecting device including an ionizer and a particle filter, and a controller. The fuser is associated with operation history information. The ionizer of the collecting device includes a first electrode and a second electrode. The ionizer generates a discharge between the first electrode and the second electrode so as to charge floating particles that are discharged from the fuser. The particle filter of the collecting device collects the charged floating particles. The controller controls a current to flow between the first electrode and the second electrode due to the discharging, based on the operation history information of the fuser.

A holding device includes: a base; a support member that is attached to the base and supports an object having a three-dimensional shape, to which a toner image has been transferred, in a state in which the object is not in contact with an upper surface of the base; and a reflecting member that is attached to the base, that reflects light emitted from a light source provided above the object in a state of being supported by the support member, and that irradiates at least a lower surface side of the object.