A liquid ejection apparatus includes: a liquid storage unit; a liquid ejection head; a liquid communication path to communicate the liquid storage unit with the liquid ejection head; and a liquid pressurization unit to supply a liquid in the liquid storage unit to the liquid ejection head through the liquid communication path by pressurization. The liquid ejection head includes: an inlet; a pressure chamber; and a circulation path through which the liquid supplied from the liquid communication path is circulated. The circulation path includes a supply channel, the pressure chamber, a collection channel, a circulation pump, and a pressure adjustment unit. The circulation pump is disposed at a position which is higher in the direction of gravity than a liquid inlet provided in a liquid channel extending from the liquid storage unit to the pressure adjustment unit and where the circulation pump is not in contact with the inlet.

A liquid ejection apparatus includes: a liquid storage unit; a liquid ejection head; a liquid communication path to communicate the liquid storage unit with the liquid ejection head; and a liquid pressurization unit to supply a liquid in the liquid storage unit to the liquid ejection head through the liquid communication path by pressurization. The liquid ejection head includes: an inlet; a pressure chamber; and a circulation path through which the liquid supplied from the liquid communication path is circulated. The circulation path includes a supply channel, the pressure chamber, a collection channel, a circulation pump, and a pressure adjustment unit. The circulation pump is disposed at a position which is higher in the direction of gravity than a liquid inlet provided in a liquid channel extending from the liquid storage unit to the pressure adjustment unit and where the circulation pump is not in contact with the inlet.

An inkjet recording apparatus includes an ink container. The ink container stores an ink for printing on a printing object. The inkjet recording apparatus also includes a stirring mechanism. The stirring mechanism stirs the ink stored in the ink container. The stirring mechanism includes a stationary shaft and a rotating body. The rotating body rotates around the stationary shaft. The stationary shaft and rotating body are placed in a lower part of the ink container.

An inkjet recording apparatus includes an ink container. The ink container stores an ink for printing on a printing object. The inkjet recording apparatus also includes a stirring mechanism. The stirring mechanism stirs the ink stored in the ink container. The stirring mechanism includes a stationary shaft and a rotating body. The rotating body rotates around the stationary shaft. The stationary shaft and rotating body are placed in a lower part of the ink container.

An image forming apparatus includes a housing of an apparatus body, an electrical equipment portion provided to project in a horizontal direction with respect to the housing, wherein a space is provided under the electrical equipment portion, a cover configured to cover the electrical equipment portion, and a louver which comprises plural slats arranged with intervals therebetween and through which an inside of the cover communicates with an outside of the cover, and is provided in a lower surface portion of the cover. The louver comprises a first louver member and a second louver member. The first louver member comprises a first slat portion constituting a part of the slats. The second louver member comprises a second slat portion disposed below the first slat portion to overlap with the first slat portion at least partially in a front view of the louver and constituting another part of the slats.

An ink-jet printer including a printing part that is provided with a plurality of printing heads and a distribution tank, a buffer tank, a heat exchanger, a manifold, a main flow pipe that successively connects the buffer tank, the heat exchanger and the manifold to one another, a sub-flow pipe that connects the manifold and the buffer tank with each other, a supply flow pipe for connecting the manifold and the printing part with each other, a collection flow pipe for connecting the printing part and the buffer tank with each other, and pumps respectively installed on the sub-flow pipe, the supply flow pipe and the collection flow pipe. The main flow pipe and the sub-flow pipe constitute a first circulation flow passage for circulating ink, and the main flow pipe, the supply flow pipe and the collection flow pipe constitute a second circulation flow passage for circulating the ink.

An ink-jet printer including a printing part that is provided with a plurality of printing heads and a distribution tank, a buffer tank, a heat exchanger, a manifold, a main flow pipe that successively connects the buffer tank, the heat exchanger and the manifold to one another, a sub-flow pipe that connects the manifold and the buffer tank with each other, a supply flow pipe for connecting the manifold and the printing part with each other, a collection flow pipe for connecting the printing part and the buffer tank with each other, and pumps respectively installed on the sub-flow pipe, the supply flow pipe and the collection flow pipe. The main flow pipe and the sub-flow pipe constitute a first circulation flow passage for circulating ink, and the main flow pipe, the supply flow pipe and the collection flow pipe constitute a second circulation flow passage for circulating the ink.

A liquid ejecting apparatus which includes an ejecting unit which ejects liquid, and a collecting unit which collects mist which occurs along with ejecting of the liquid from the ejecting unit from a collecting port, in which the collecting unit includes a backflow prevention unit in the collecting port. By adopting such a liquid ejecting apparatus, it is possible to suppress backflow of mist of the liquid from the collecting unit which collects mist of the liquid which occurs along with ejecting of liquid from the ejecting unit.

A liquid ejecting apparatus which includes an ejecting unit which ejects liquid, and a collecting unit which collects mist which occurs along with ejecting of the liquid from the ejecting unit from a collecting port, in which the collecting unit includes a backflow prevention unit in the collecting port. By adopting such a liquid ejecting apparatus, it is possible to suppress backflow of mist of the liquid from the collecting unit which collects mist of the liquid which occurs along with ejecting of liquid from the ejecting unit.

Disclosed is a method to mitigate deterioration of printing fluid in a tank of a printer. The method comprises: draining printing fluid from a tank of a printer, and stopping the draining before the tank is empty, wherein the printing fluid comprises solids suspended in imaging oil, filtering the printing fluid drained from the tank, to separate at least some of the solids from the imaging oil, passing the filtered imaging oil to a reservoir; and then passing imaging oil from the reservoir to the tank. Also disclosed is a printer and a system to perform the method.