An application device includes a conveyer to convey a recording medium, an application roller to apply a treatment liquid to the recording medium, a pressure roller to sandwich the recording medium with the application roller to press the recording medium against the application roller, and a winding member to form a curved conveying path to have the recording medium curved along a conveying direction to wind the recording medium around the pressure roller. The pressure roller comes in contact with the application roller when applying the treatment liquid and separates from the application roller when not applying the treatment liquid. A predetermined positional relationship is maintained between the pressure roller and the winding member while the pressure roller moves close to the application roller to be in contact with the application roller, or the pressure roller moves away from the application roller to be separated from the application roller.

A printing apparatus, which applies ink to a target print medium to form an image by a print unit, includes a plurality of temperature regulation units juxtaposed in a conveyance direction of the target print medium and each configured to regulate a temperature of the target print medium, a plurality of measurement units each configured to measure the temperature of the target print medium, and a control unit configured to make a temperature regulation capability of each temperature regulation unit variable, wherein each temperature regulation unit regulates temperature in a widthwise direction of the target print medium, each measurement unit measures the temperature in the widthwise direction of the target print medium, and the control unit controls the plurality of temperature regulation units based on the measured temperatures.

A drying device includes a roller, and the drying device is for drying a recording medium conveyed by rotation of the roller. The drying device includes a first heating source and second heating source included inside the roller; first and second temperature detectors for respectively detecting a temperature of a first region on a surface of the roller and a temperature of a second region on the surface of the roller; and a heating controller that controls heating and termination of the heating by the first heating source and/or the second heating source, wherein, upon detecting that a temperature of one region of the first region and the second region is higher than or equal to a predetermined temperature, the heating controller terminates heating by one heating source corresponding to the other region.

A liquid ejecting device includes an ejecting head configured to eject liquid to a medium, a conveyance belt including an adhesive layer to which the medium is bondable, the conveyance belt being configured to convey the medium with the adhesive layer, a heating unit configured to heat the conveyance belt, a pressing unit configured to press the medium against the conveyance belt heated by the heating unit, a channel member configured to define a channel of the liquid to be supplied to the ejecting head, an airflow generation unit configured to generate airflow to be jetted to the conveyance belt past the pressing unit, and a heat exchange mechanism configured to exchange heat between a heat absorption unit configured to absorb heat and a heat dissipation unit configured to emit heat. The heat dissipation unit makes contact with the channel member, and the heat absorption unit is disposed in a course of an airway path through which the airflow moves.

Recording on a recording medium with multiple types of liquid can be performed separately for a first recording unit and a second recording unit, a part of the first recording unit and a part of the second recording unit are provided at different positions in a vertical direction, and a part of a region obtained by projecting the first recording unit in the vertical direction and a part of a region obtained by projecting the second recording unit in the vertical direction overlap with each other in a horizontal direction, and the recording medium conveyed out of the first recording portion is conveyed in a horizontal attitude until the recording medium has passed a predetermined distance in a first drying portion of the first recording unit.

A processor causes a sheet conveying device to execute a process of conveying a target sheet in a state in which a specific surface on which a first test image including a plurality of black patch images arranged in a stepwise manner is formed serves as a printing surface. The processor supplies data of a second test image including a plurality of line segment images corresponding to the plurality of black patch images to an image processing device as reference image data, and acquires information on a test interference position, which is a position where a second test image interferes with a mask area corresponding to the plurality of black patch images. The processor sets a reference center position according to the test interference position.

A processor acquires a pair of first lateral edge positions when a first surface of a target sheet serves as a printing surface. The processor acquires a pair of second lateral edge positions when a second surface of the target sheet serves as a printing surface. The processor acquires matching scale information that specifies a matching scale image from among a plurality of first scale images formed on the first surface of the target sheet whose position matches a position in a width direction of one of a plurality of second scale images formed on the second surface of the target sheet. The processor sets a reference center position according to a ratio of an interval between the pair of second lateral edge positions to an interval between the pair of first lateral edge positions and the matching scale information.

When a disconnection detecting circuit detects failure, a controller of a temperature controller manipulates a duty ratio to distribute the duty ratio to normal heating rollers. Since the amount of heat decreased by failure of a heating roller can be compensated for by the other heating rollers, no defective drying will occur. It is not necessary to stop a printing process immediately when the disconnection detecting circuit detects failure, but a maintenance operation can be carried out after fully securing a preparation time for maintenance. The quick maintenance can be performed to restrain downtime of the printing apparatus.

A medium drying device includes a transport roller pair as a transport unit that transports a medium and a heat roller pair as one heating unit that heats the medium transported by the transport roller pair and is provided in a transport direction of the medium, in which the medium is configured to be transported to a heating area by the heat roller pair a plurality of times.

A heating device including, an endless belt, a heater, a temperature detector, a high thermal conductor including a hole or a notch, a holder restricts a movement of the high thermal conductor in at least at a downstream of the first direction, a first gap along the first direction formed between an upstream surface in the first direction of the temperature detector and an upstream surface in the first direction of the hole or the notch of the high thermal conductor, a second gap along the first direction formed between a downstream surface in the first direction of the high thermal conductor and a downstream surface in the first direction of the housing portion, wherein a size A of the first gap and a size B of the second gap satisfy a relationship of A>B.