An apparatus for supplying chemical liquid may include at least two ink jet heads, a reservoir for receiving a chemical liquid provided onto a substrate from each of the at least two ink jet heads, a chemical liquid for supplying member providing the chemical liquid to each of the at least two ink jet heads, and a chemical liquid collecting member for drawing and collecting a chemical liquid remained in each of the at least two ink jet heads. One path of the chemical liquid from the chemical liquid supplying member to the chemical liquid collecting member via one of the at least two ink jet heads may be substantially the same as a length of another path the of chemical liquid from the chemical liquid supplying member to the chemical liquid collecting member via the other of the at least two ink jet heads.

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

An inkjet printing apparatus includes: a print head device including an inkjet head to spray a composition for ink including a plurality of bipolar elements; an ink circulation device including an ink storage to store the composition for ink, and transfer the composition for ink to the print head device; an ink injection device to inject the composition for ink into the ink storage; and a temperature adjusting device to adjust a temperature of the composition for ink. The temperature adjusting device includes: a first temperature adjusting device to adjust a temperature to be included in a first reference temperature range; a second temperature adjusting device to adjust a temperature to be included in a second reference temperature range; and a third temperature adjusting device to adjust a temperature to be included in a third reference temperature range.

A liquid discharge apparatus includes: a liquid discharge head configured to discharge a liquid onto a printing medium to form an image on the printing medium; a conveyor configured to convey the printing medium to the liquid discharge head in a conveyance direction; a carriage mounting the liquid discharge head, the carriage configured to move the liquid discharge head in a first direction orthogonal to the conveyance direction; and a controller configured to calculate a control parameter to shift a printing position of the liquid discharge head in at least one of the first direction or the conveyance direction for each time the conveyor conveying the printing medium.

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

The present disclosure provides a substrate processing apparatus capable of stably controlling a meniscus position. The substrate processing apparatus comprises a head unit configured to discharge a medical fluid; a reservoir configured to store the medical fluid and supply the medical fluid to the head unit; a pressure control unit configured to control pressure in the reservoir; and a trap unit disposed between the reservoir and the pressure control unit and configured to trap a mist generated by the reservoir.

A fluidic die includes an array of nozzles, each nozzle to eject a fluid drop in response to a corresponding actuation signal having an actuation value. Nozzle select logic provides for each nozzle a nozzle select signal having a select value or a non-select value. Actuation logic provides the respective actuation signal for each nozzle, the actuation logic to receive one or more drop weight signals, and for each nozzle select signal having the select value, to provide an actuation signal having an actuation value to the corresponding nozzle and/or to one or more neighboring nozzles based on a state of the one or more drop weight signals.

A printing apparatus includes: a discharging head discharging, onto a print medium, at least one ink among a printing ink, a base layer ink and a protective layer ink; an obtaining section obtaining information regarding a shape of the print medium; and a controller. The controller executes an ink amount increasing processing by controlling a discharging operation of the discharging head so as to increase an amount per unit area of the at least one ink with respect to a ridge line present area including a ridge line as a boundary between one print surface and the other print surface which are adjacent to each other in the print medium than another area different from the ridge line present area, based on the information regarding the shape of the print medium obtained by the obtaining section.

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.