A decurling device includes: a pair of decurling units configured to correct curl of a recording medium by sandwiching the recording medium; a switching unit configured to switch the pair of decurling units between a first state in which a pressure contact force is relatively large and a second state in which the pressure contact force is smaller than that in the first state; a release unit configured to release a pressure contact between the pair of decurling units; and a restricting unit configured to restrict release of the pressure contact between the pair of decurling units when the pair of decurling units are in the first state.

A decurling device includes: a rotary body: an endless correction belt configured to correct curl of a recording medium passing between the rotary body and the correction belt; and a pressure contact unit disposed inside the correction belt, an opposite surface of the pressure contact unit to the rotary body being supported by a support unit so as to be in pressure contact with the rotary body, in which a center portion, in an axial direction of the rotary body, of at least one of a contact portion of the pressure contact unit or a contact portion of the support unit further protrudes toward the other of the contact portion of the pressure contact unit and the contact portion of the support unit than both end portions thereof.

An imaging system includes: an endless belt, a tensioning member, a heating member, a pressing member, a cleaning member. The endless belt conveys a printing medium. The tensioning member tensions the endless belt. The heating member heats the endless belt. The pressing member presses the endless belt against the heating member. The cleaning member is located outside the endless belt, between the tensioning member and the heating member, and presses the endless belt inwardly.

In some examples, a conditioner system for a media printed by a printing system includes a media conditioning assembly comprising a heater, the media conditioning assembly to receive the media printed by the printing system after the media has been heated by a dryer in the printing system after printing has occurred on the media. Responsive to a determined moisture content of the media, the heater of the media conditioning assembly controls a temperature of the media, and the media conditioning assembly controls a speed of the media through the media conditioning assembly.

A paper ejection device includes: an ejection portion that ejects sheets of paper; a housing portion that houses the ejected sheets of paper in a sequentially stacked state; and a guiding portion that guides the sheets of paper, before being ejected, to the ejection portion while curving the sheets of paper. The housing portion is adjustable to plural angles including at least an angle at which the ejected sheets of paper are housed while being curved in a direction opposite to a direction in which the sheets of paper have been curved by the guiding portion.

A conditioner includes a pressure roller assembly, a heating element, a drive motor, a current sensor, a plurality of print media sensors, and a controller. The heating element heats the pressure roller assembly. The drive motor rotates the pressure roller assembly. The current sensor senses a current of the heating element. The plurality of print media sensors sense the movement of print media through the conditioner. The controller is to turn off the heating element in response to any one of detecting an anomaly in the sensed movement of the print media or detecting a sensed current outside a predetermined range.

An image forming apparatus includes a fixing unit that transports a sheet of paper carrying an unfixed image through a nip part to fix the unfixed image to the sheet, the nip part applying heat and pressure to the sheet, a first guide unit that guides transport of the sheet, the first guide unit coming into contact with a first side of the sheet leaving the nip part of the fixing unit, and a second guide unit that guides transport of the sheet, the second guide unit coming into contact with a second side of the sheet leaving the nip part of the fixing unit, the second guide unit being rotatable, the second side being opposite to the first side. The first guide unit has a guide part. The guide part includes an upstream guide part disposed upstream with respect to a sheet transport direction, and a bent guide part that is bent at an endpoint position of the upstream guide part in a direction of entry into a sheet transport passage relative to the upstream guide part. At least one portion of the second guide unit is disposed to face the bent guide part such that the at least one portion of the second guide unit is positioned within an area corresponding to a portion of the bent guide part from an upstream end to a downstream end with respect to the sheet transport direction, with a space being provided between the at least one portion of the second guide unit and the bent guide part to allow passage of the sheet.

A transport device includes a first transport member that orbits in a predetermined direction and transports a sheet-like medium; a second transport member that forms a first sandwiching region that is curved and a second sandwiching region that is curved in a direction opposite to the first sandwiching region between the first transport member and the second transport member, and sandwiches and transports the medium in the first sandwiching region and the second sandwiching region; and a changing unit that changes a positional relationship between the first transport member and the second transport member so as to increase a width of the other of the first sandwiching region and the second sandwiching region in a transport direction of the medium without increasing a width of one of the first sandwiching region and the second sandwiching region in the transport direction of the medium.

A decurling device includes: a first transport unit including a transport roller, the first transport unit that sandwiches a transported sheet and transports the transported sheet further downstream; and a second transport unit including an endless belt that is in contact with the transport roller. The transport roller has an elasticity that, when the belt is pressed against the transport roller, allows the belt to bite into the transport roller by a bite amount corresponding to a pressing force, the second transport unit includes an abutting member disposed inside the belt, the abutting member pressing the belt from an inside of the belt and causing the belt to abut against the transport roller, and a guide member, the abutting member includes an upstream protrusion, an downstream protrusion, the upstream protrusion and the downstream protrusion being provided at positions away from each other at an upstream portion and a downstream portion in a sheet transport direction, each of the upstream protrusion and the downstream protrusion protruding toward an inner surface of the belt, and a recess provided in an intermediate portion between the upstream protrusion and the downstream protrusion in the sheet transport direction, the recess being recessed away from a straight line connecting a top portion of the upstream protrusion and a top portion of the downstream protrusion, the guide member includes a contact surface that is in contact with the inner surface of the belt, the contact surface defining a part of a circulation track of the belt, and the upstream protrusion protrudes beyond a virtual circle that is tangent to the contact surface.

An image forming apparatus includes a liquid applier, a heating device, and circuitry. The liquid applied is configured to apply liquid to a conveyance target object that is conveyed at a first speed. The heating device is configured to heat the conveyance target object on which the liquid is applied. The circuitry is configured to control a conveying speed of the conveyance target object. The circuitry is configured to cause the conveyance target object to be conveyed at a second speed that is faster than the first speed after the liquid applier applies the liquid to the conveyance target object.