A recording apparatus according to an embodiment may include: a control unit that controls a medium conveyance unit to unwind the wound medium and convey the medium, a recording unit to record an image of recording agent on the medium, and a drying unit to dry the image of the recording agent in a first drying zone and a second drying zone downstream from the first drying zone. Upon causing the recording unit to record a second image after having caused the recording unit to record a first image, the control unit causes the drying unit to dry the recording agent of the first image in the first drying zone, and convey the medium in a direction opposite to the conveyance direction to a predetermined position downstream from the recording unit, and thereafter causes the recording unit to apply the recording agent of the second image to the medium.

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 conveyance passage, and heats the recording medium. The thermal head is provided with a plurality of element arrays in the width direction, the element arrays each having a plurality of heating elements arrayed in the recording medium conveyance direction. The heat control portion makes generate heat at least some heating elements in the element arrays corresponding to the ink discharge ports through which ink is discharged.

A dryer includes a conveyor to convey a film including a first surface onto which a liquid is applied, a noncontact heater to heat the first surface of the film conveyed by the conveyor without contacting the first surface, a contact heater to contact and heat a second surface of the film opposite the first surface, and circuitry to set a first heating temperature of the contact heater less than 85 C. and set a second heating temperature of the noncontact heater to be 30 C. to 90 C. higher than the first heating temperature.

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 inkjet recording apparatus includes an image forming section, a heater, a calculation section, storage, and a determination section. The image forming section ejects ink onto a sheet in which first to M-th regions are defined (M is an integer of at least 2). The heater includes first to M-th heat sources and heats an n-th region of the sheet using an n-th heat source (n is an integer of at least 1 and no greater than M). The calculation section calculates an ink ejection rate of ink to be ejected onto the n-th region. The storage stores therein heating information indicating whether it is necessary to heat the n-th region. The determination section determines whether or not to cause the n-th heat source to generate heat.

To provide a heating drum which even when heated at a high temperature, is capable of suppressing the limb part from being deviated relative to the main body part, and an ink-jet printing device equipped with such a heating drum.

The present invention relates to a heating drum D which in order to guide a long-sized medium and also to heat and dry the medium, is provided with a cylinder shaped main body part 1, disc-shaped limb parts 2 attached to the two end parts of the main body part 1, and a shaft core 3 attached to the limb part 2 are installed, and the heating drum D further has a structure in which, on the edge of the inner circumferential surface of the main body part 1, a cut-out part 1a that extends in the circumferential direction is formed and a groove part 1c that extends in the circumferential direction is formed on the inner circumferential surface on the inner side from the cut-out part 1a of the main body part 1, wherein the cut-out part 1a and the groove part 1c are in parallel with each other, and the limb part 2 is fitted to the cut-out part 1a, with the claw part 4 being fixed to the limb part 2 by a fitting tool 5, so that a hook part 4a of the claw part 4 is freely movably fitted to the groove part 1c, and an ink-jet printing device I having such a heating drum D.

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.

At step S115, a printer control unit refers to a table using an average print duty as an input, and determines a saturation temperature and a drum preliminary heating temperature. In this example, since the saturation temperature and the preliminary heating temperature with respect to the print duty are stored as a table, the printer control unit refers to the table using the average print duty as the input, and determines the saturation temperature and the drum preliminary heating temperature. At step S120, the printer control unit investigates a current drum temperature based on a measurement result of a temperature sensor. Subsequently, at step S125, the drum is heated or cooled until it reaches, of the saturation temperature and the drum preliminary heating temperature, the temperature for which the difference with the current drum temperature is smaller.

A heating apparatus, an image forming apparatus, and a liquid discharge apparatus. The heating apparatus includes a heating roller having a heat source inside, an end holder in which a portion of the heat source is disposed, the end holder holding an axial end of the heating roller rotatably, and an air supply device configured to supply air into the end holder in a direction intersecting with an axial direction of the heating roller. The heating apparatus includes a heating roller having a heat source inside, and an end holder in which a portion of the heat source is disposed, the end holder rotatably holding an axial end of the heating roller. In the heating apparatus, the end holder has an air inlet opening through which air is supplied into the end holder and an air outlet opening through which air is ejected outside from inside the end holder.

An ink jet recording system including: a conveyance mechanism that includes a temperature controlling conveyance drum that conveys a recording medium to a recording mechanism; a recording mechanism that includes a temperature controlling recording drum that conveys the recording medium, and a process section that applies ink to one surface of the recording medium so as to record an image thereon, a first hardware processor that controls a reversing mechanism to reverse the recording medium to the one surface applied with ink and then delivers the recording medium to the conveyance mechanism, a discharging mechanism provided upstream of the reversing mechanism in a conveyance direction of the recording medium, and a second hardware processor that controls to switch conveyance paths and to determine whether the recording medium to which the ink is applied is conveyed to the discharging mechanism or the reversing mechanism.