A printing apparatus that performs a printing through an inkjet method is provided and includes: an inkjet head, and a heater. An ink contains an energy ray absorber and a solvent. The energy ray absorber is a substance that generates heat by absorbing an energy ray. The heater evaporates at least a part of the solvent in the ink by irradiating the ink with the energy ray. The ink contains, as at least a part of the solvent, a main solvent which is a component of a liquid that accounts for greater than or equal to 30% by weight ratio with respect to an entire of the ink. The main solvent is one or more mixtures selected from an organic solvent of normal paraffins, an organic solvent of isoparaffins, an organic solvent of naphthenes, an organic solvent of alkylbenzenes, and an organic solvent of olefins.

A drying device for drying a recording medium includes a medium guide part that guides the recording medium; a heating body that heats the medium guide part; a cover that is arranged opposing the medium guide part such that the medium carrying path intervenes between the cover and the medium guide part and an air flow path is formed with the medium guide part and the cover; a fan that generates an air flow; and (e) a duct that is configured to discharge the air in the air flow path together with a vapor generated as the recording medium is heated, wherein an air intake port that takes the air in the air flow path into the duct is formed on the downstream side of the flow direction with resect to the heating body.

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.

An inkjet recording apparatus has a recording head, a thermal head, and a heat control portion. The recording head has an ink discharge surface. The thermal head is arranged opposite the ink discharge surface across a recording medium conveying passage and heats a recording medium. In the thermal head, a plurality of element arrays each formed of a plurality of heating elements arrayed in the recording medium conveying direction are provided in the width direction. The heat control portion makes at least part of the heating elements in the element arrays that correspond to the ink discharge ports that discharge ink generate heat.

An ink jet recording method includes heating a recording medium, and attaching an aqueous ink composition to the heated recording medium by ejecting the aqueous ink composition through a nozzle. The aqueous ink composition contains water, a solvent, and resin particles. In the attaching step, a temperature difference between a temperature of the nozzle and a surface temperature of the heated recording medium is 4 to 8 C. The resin particles include particular resin particles formed from a resin whose decrease rate of absorbance of light having a wavelength of 400 nm is 15% or smaller in 1 hour at 40 C. and 10% or larger in 1 hour at 80 C. in a liquid mixture containing the solvent contained in the aqueous ink composition and the particular resin particles such that a resin solid component of the liquid mixture is 0.5% by mass.

A heating device includes a holder, a receiver, a heating unit, a vertical mover, and circuitry. The holder holds a heating target object. The receiver removably holds the holder. The heating unit heats the heating target object. The vertical mover moves at least one of the receiver and the heating unit vertically relative to each other, between a non-contact heating position and a contact heating position. The circuitry causes the vertical mover to move the at least one of the receiver and the heating unit to the non-contact position, causes the heating unit to heat the heating target object in a non-contact state, causes the vertical mover to move the at least one of the receiver and the heating unit to the contact heating position, and causes the heating unit to heat the heating target object in a contact state.

Disclosed is a printing apparatus including a recording head configured to perform printing on a medium that is transported in a transport direction, a guide portion disposed on a downstream side of the recording head in the transport direction and configured to guide the medium, and a first heating unit disposed between the recording head and the guide portion in the transport direction and configured to heat the medium. The guide portion includes a contact member configured to guide the medium by contacting the medium, a coupling portion coupled with the contact member, and a holding unit configured to hold the contact member via the coupling portion. Thermal conductivity of the coupling portion is lower than thermal conductivity of the holding unit.

The present invention relates to an ink-jet printing apparatus that is capable of obtaining printed materials having good appearance while maintaining high quality of printed characters or images even when printed on a resin printing medium using a water-based ink, and an ink-jet printing method. The present invention provides an ink-jet printing apparatus in which when setting a plurality of measuring positions of a printing medium including a position of the printing medium at which the printing medium is wound into a web roll in a web roll heating/supporting mechanism and positions of the printing medium which are respectively located just below a plurality of ink-jet printing heads, a plurality of temperature measuring devices measure temperatures of a surface of the printing medium at the plurality of measuring positions, respectively, and a heating amount control device controls a heating amount of the web roll heating/supporting mechanism and heating amounts of under heaters on the basis of the plural measured temperatures such that a difference between the temperatures measured in a portion of the printing medium to which a tension force is applied falls within the range of 10 C., and an ink-jet printing method using the ink-jet printing apparatus.

To dry ink using a more appropriate method in a case of performing printing using an ink-jet printer of a line system and the like. A printing device that performs printing using an ink-jet system includes: a conveyance driving unit as a conveyance module that conveys a medium; ink-jet heads; and an ultraviolet ray irradiation unit as an energy irradiation module. A length of the ink-jet heads in a width direction of the medium is larger than a width of a region to be printed. Ink ejected from the ink-jet heads is ink that contains an energy ray absorber and a solvent, the ink being fixed to the medium by evaporating the solvent. The ultraviolet ray irradiation unit irradiates the ink adhering onto the medium with ultraviolet rays to volatilize and remove at least part of the solvent contained in the ink.

A printing apparatus includes a transporting unit that transports a printing medium, a transporting unit encoder that outputs a movement amount information indicating a movement amount of the printing medium, a medium winding unit disposed downstream of the guide member with respect to the transporting unit and winds the printing medium, a tension applying unit including a tension bar that presses the printing medium at a location between the transporting unit and the medium winding unit while the tension bar is moving between an upper limit position and a lower limit position and applies tension to the printing medium, a tension applying unit encoder that outputs a rod member location information indicating a position of the tension bar, and a control unit that determines a movement state of the printing medium at the tension applying unit, based on the movement amount information and the rod member location information.