A printing apparatus includes a conveyance path including a curving part, an inversion path for inverting a medium upside down, and a control unit, and the control unit includes a first mode for conveying the long medium at a first speed when a surface that faces inside when the long medium is rolled in a roll shape and a surface that faces inside when conveyed in a curved shape through the curving part are the same, and a second mode for conveying the long medium at a second speed lower than the first speed of the first mode when the surface that faces inside when the long medium is rolled in the roll shape and the surface that faces inside when conveyed in the curved shape through the curving part are different from each other.

A method is provided for controlling a web in a printing apparatus The printing apparatus includes a transport assembly for moving the web through a transport path along a printing unit for printing an image onto a print area of the web. The method includes feeding the web from a supply roll through the transport path to the transport assembly; and switching the printing apparatus to a ready-to-print mode, wherein the printing unit does not print an image on the web and the web is maintained ready to be printed on. In a printing mode after the ready-to print mode, the following steps are performed: moving the web through the transport path in a transport direction along the printing unit by the transport assembly; and printing the image onto the print area of the web by the printing unit. The image is printed by applying an image material, which solidifies on the web during the printing step. The ready-to-print mode includes the step of: operating the transport assembly to prevent a deformation of the print area of the web in the transport path, while maintaining the web in the ready-to-print mode. The web is maintained ready to print while preventing a deformation of the print area of the web in the transport path.

A printing apparatus includes a platen that supports a recording medium, a printing head that reciprocates along the platen, and discharges a droplet onto the recording medium supported by the platen at least in a forward route or a backward route of the reciprocation, to perform printing, and an air blowing unit disposed on at least one of two sides of the platen in a reciprocation direction, that is a direction in which the printing head moves along with the reciprocation, and blows an airflow to a nozzle surface of the printing head that reciprocates.

A liquid discharge apparatus is provided that includes a transport unit configured to transport a medium, a discharge unit configured to discharge a liquid onto the medium, a housing including therein the discharge unit, a humidifying unit configured to humidify an interior of the housing, and a humidity detection unit configured to detect a humidity. When the humidity detection unit detected a humidity less than a lower limit value (one example of a first predetermined value) (positive determination in step S12), the interior of the housing is humidified by the humidifying unit during transport by the transport unit or during discharge by the discharge unit (step S16).

In a recording apparatus, the quality of an image is improved.

A recording apparatus is provided with a droplet discharging head having a nozzle forming portion and a charging unit. The nozzle forming portion includes nozzles formed therein. The charging unit is configured to impart an electrical charge to the medium. The charging unit imparts, to the medium, an electrical charge having the same polarity as an electrically charged state of the nozzle forming portion after the droplets are discharged.

An image forming apparatus includes: an ink-jet head including a storage that stores phase transition ink, the ink jet head forms an image on a recording medium by ejecting the phase transition ink; and one or more hardware processors. The one or more hardware processors change a driving condition of the ink jet head for a case of ejecting the phase transition ink on a basis of a first reading result of a pattern image formed by the ink-jet head; estimate occurrence of a state change of the phase transition ink in the storage when the driving condition that is changed satisfies a predetermined condition; and determine whether a lifetime of the ink jet head is over in accordance with whether the occurrence of the state change is estimated.

An apparatus for ink contaminant drying includes a marker platen having a topside and a bottom side, and a plurality of heating elements located beneath the topside of the marker platen. The plurality of heating elements provides heating with respect to a surface of the marker platen, which prevents ink contaminants on the surface from remaining in a viscous fluidic state over a period of time.

An ink jet printer according to an aspect of the invention includes a heat platen that is capable of heating in a state of supporting recording sheets, a head that discharges ink onto the recording sheets from a nozzle plate in which nozzles are provided, a temperature sensor that acquires temperature information of the nozzle plate, a main scanning portion that performs a main scanning operation that relatively moves the head in a main scanning direction with respect to the recording sheets, a sub-scanning portion that performs a sub-scan operation that relatively moves the recording sheets in a sub-scanning direction, which intersects the main scanning direction, with respect to the head, and a determination portion that determines the necessity of a heating operation, in which the heat platen heats the nozzle plate, on the basis of the temperature information before printing.

A liquid discharge apparatus includes a housing, a holder configured to hold a medium, a heater configured to heat the medium held by the holder, and a liquid discharge head configured to discharge a liquid onto the medium held by the holder. The holder has a flat holding surface on which the medium is placed flat, the holder is movable in the housing in a direction parallel to the flat holding surface and in a vertical direction, and the heater is disposed inside the housing within a movable region of the holder in which the holder is movable in the direction parallel to the flat holding surface in a view from the vertical direction.

A roll-shaped medium transport device includes: a medium supply unit that keeps a roll body formed by winding a roll-shaped medium on a support shaft, and unwinds and supplies the roll-shaped medium; a transport unit that transports the roll-shaped medium unwound from the roll body; a rotation detecting unit that detects rotation of the support shaft; a rotation unit that rotates the support shaft; and a determination unit that determines abnormality of a transport state of the roll-shaped medium on the basis of the rotation detecting unit when the rotation unit rotates the support shaft, when the rotation detecting unit does not detect the rotation of the support shaft in a state where a transport operation of the roll-shaped medium is performed by the transport unit.