In an example, an apparatus includes an air treatment part to reduce the amount of a component comprised in air in the air treatment part and to supply treated air to a curing part, the air treatment part comprising a catalytic oxidizer to oxidize the component. The apparatus also includes the curing part to receive treated air from the air treatment part and to expose an item printed with a printing fluid comprising the component to the received treated air. The apparatus includes an air circulation system to cause the treated air to flow from the air treatment part into the curing part and to cause air from the curing part to flow into the air treatment part.

A sheet heater includes a first conveyance belt configured to convey a sheet on which a liquid has been discharged in a conveyance direction, a heating unit facing the first conveyance belt, the heating unit configured to heat the sheet conveyed by the first conveyance belt, and a second conveyance belt disposed upstream of the first conveyance belt in the conveyance direction, the second conveyance belt configured to convey the sheet to the first conveyance belt. A surface temperature of the second conveyance belt is lower than a surface temperature of the first conveyance belt when the first conveyance belt and the second conveyance belt convey the sheet.

According to an example, a printing system may include printing components, an input voltage engine to determine whether an input voltage level is outside of a predetermined voltage level range, and a printing components engine to control the printing components to operate in one of a normal mode and a reduced throughput mode based upon whether the accessed input voltage level is outside of the predetermined voltage level range.

A liquid ejecting device includes an ejecting unit that includes a nozzle surface at which at least one nozzle is open and that ejects a liquid onto a medium from the at least one nozzle, a carriage that is mounted with the ejecting unit and that reciprocates in a scanning direction, a drying unit that is mounted at the carriage and that dries the liquid ejected onto the medium by the ejecting unit, and a receiving unit that receives the liquid discharged from the at least one nozzle as a result of a maintenance operation for the ejecting unit. The receiving unit includes an absorbing member that absorbs the liquid. The drying unit dries the absorbing member when the ejecting unit is positioned, during printing, at a stop position at which the ejecting unit stops.

Circuits for controlling an impeller in a fluid flow distribution system to achieve a target fluid flow are disclosed. The circuit to output a signal representative of a speed value (N.sub.T) of the impeller derived from a stored power consumption value (W.sub.i) and speed value (N.sub.i) pairs to achieve the target fluid flow. The circuit to receive a power signal representative of an input power consumption value (W) of the impeller at the speed value (N.sub.T) to input fluid to the fluid flow distribution system and to compare the value (W) represented by a power signal for the speed value (N.sub.T) with the stored value (W.sub.i) and impeller speed value (N.sub.i) pairs to determine a least difference impeller speed value (N.sub.L) of the stored pair comprising a least difference between the value (W) and the value (W.sub.i). The circuit to output a speed signal representative of value (N.sub.L).

An ink printing device has a dryer chamber that is connected via two openings with the internal space of the printer. To detect whether operational exhaust air flows, as leakage air, from the drying chamber into the internal space, the temperature in the opening region may be measured and compared with a reference value. Given a temperature difference above a threshold value, an error signal is generated and/or corresponding countermeasures are taken in order to reduce the leakage.

A dryer for conveying and drying an object to be dried, the dryer includes a conveyor including a first path and a second path along which the object to be dried is conveyed, a conveyance direction of the second path being different from a conveyance direction of the first path, and a blower to blow air onto the object to be dried. The blower includes a first air outlet that faces the first path and blows the air onto the object to be dried conveyed along the first path, and a second air outlet that faces the second path and blows the air onto the object to be dried conveyed along the second path.

A drying device includes a drier, a gas circulator, and a concentration adjuster. The drier warms a liquid composition on a drying target object. The gas circulator circulates a gas containing a volatile component of an organic solvent warmed and volatilized by the drier to reuse the gas for drying. The concentration adjuster adjusts a concentration of the volatile component reused.

A heating device configured to heat a medium on which a liquid for printing is impinged includes a heating element configured to face a processing surface, the processing surface being a surface on which the liquid is impinged, a blower configured to blow gas to a heating region between the heating element and the processing surface from the heating element side of the medium, and a control unit configured to control an output of the heating element and a driving amount of the blower. The control unit changes the driving amount of the blower in accordance with a type of the medium while maintaining the output of the heating element constant regardless of the type of the medium. The decrease in the drying efficiency of the medium is suppressed.

A conveying device includes a blower and a conveyor. The blower blows air to a sheet material. The conveyor conveys the sheet material through a blowing region of the blower. The conveyor includes a surface movable member and a presser. The surface movable member conveys the sheet material with movement of a surface of the surface movable member, with a back side of the sheet material supported with the surface movable member. The presser presses at least a portion of a leading end of the sheet material toward the surface movable member in at least an area from a position upstream from the blowing region in a conveyance direction of the sheet material to a position in the blowing region of the blower.