The idle operation is performed before time t1. The supply amount of the ink from the main tank 95 to the collection sub-tank 92 can be increased with the passage of time while the supply of the ink from the main tank 95 to the collection sub-tank 92 is continued before and after a transition to the print starting operation from the idle operation. Therefore, it is possible to deal with the start of ink discharge from the discharge head H. That is, the ink is already supplied to the collection sub-tank 92 by the supply pump 962 before the start of printing, and the start of ink discharge can be dealt with by increasing the ink supply amount. Therefore, the ink can be stably discharged by suppressing an output variation of the circulation pump 93 at the start of printing.

There is provided a novel inkjet recording device capable of preventing an ink droplet from being attached to and firmly fixed to a bent pipe part formed at a gutter. The device has a configuration where separately from air flowing through an inflow opening 36 of a gutter 29, secondary air is supplied to a bent region 34bent of a bent pipe part 34, the secondary air flowing in the same direction as air flowing out from an outflow 34out side of the bent pipe part 34. The ink droplet is prevented from being attached and fixed to the bent pipe part 34 formed at the gutter 29 because the secondary air can increase a flow rate of an air flow in an inner peripheral surface region 40 on an inner side of the bent pipe part 34.

A waste liquid collection device includes: a tank housing that stores a liquid; a tubular member that causes the liquid to flow into the tank housing; a distance holding device disposed at an end portion of the tubular member suspended in an internal space of the tank housing; and a buoyancy imparting device having buoyancy for the liquid and causes the distance holding device to float on a liquid surface of the liquid, while keeping a certain distance between the end portion of the tubular member and the liquid surface using the buoyancy of the buoyancy imparting device. A liquid discharge apparatus includes the waste liquid collection device.

A liquid discharge apparatus including: a first storage section that stores a liquid; a second storage section that communicates with the first storage section; a supply channel that supplies the liquid from the second storage section to a liquid ejecting head; a collection channel that collects the liquid from the liquid ejecting head to the first storage section; the pressurization section that pressurizes the inside of the second storage section; and a control section, in which the first storage section, the supply channel, the liquid ejecting head, the collection channel, the second storage section, and the communication path form a circulation route, and the control section is configured to execute discharge circulation in which circulation of the liquid is performed while discharging the liquid from the nozzle, and non-discharge circulation in which circulation of the liquid is performed without discharging the liquid from the nozzle.

A liquid discharge apparatus including: a first storage section that stores a liquid; a second storage section that communicates with the first storage section; a supply channel that supplies the liquid from the second storage section to a liquid ejecting head; a collection channel that collects the liquid from the liquid ejecting head to the first storage section; the pressurization section that pressurizes the inside of the second storage section; and a control section, in which the first storage section, the supply channel, the liquid ejecting head, the collection channel, the second storage section, and the communication path form a circulation route, and the control section is configured to execute discharge circulation in which circulation of the liquid is performed while discharging the liquid from the nozzle, and non-discharge circulation in which circulation of the liquid is performed without discharging the liquid from the nozzle.

A printer includes: a platen having an ink-collection slot extending across its width; a wick bar received in the ink-collection slot, wherein an upstream gap and a downstream gap are defined at either side of the wick bar relative to a media feed direction; a printhead positioned over the wick bar; and a vacuum chamber in fluid communication with the ink-collection slot. The wick bar is mounted on a rotatable shaft and the vacuum chamber comprises a scraper positioned for scraping the wick bar as it rotates past the scraper.

A printer includes: a platen having an ink-collection slot extending across its width; a wick bar received in the ink-collection slot, wherein an upstream gap and a downstream gap are defined at either side of the wick bar relative to a media feed direction; a printhead positioned over the wick bar; and a vacuum chamber in fluid communication with the ink-collection slot. The wick bar is mounted on a rotatable shaft and the vacuum chamber comprises a scraper positioned for scraping the wick bar as it rotates past the scraper.

A ROM unit mounted to a bottle has a plurality of terminal plates on the front end surface of the ROM unit. The ROM unit is movable in a direction orthogonal to a bottle axis Ax, and can be positioned at a retreat position where an interference with a contamination preventing eaves is avoided, and a contact position projected more front than the retreat position. The terminal plates can be electrically contacted with reservoir terminals when positioning at the contact position.

A liquid ejection head includes a pressure chamber communicating with an ejection port, an ejection element which ejects the liquid from the port, and a circulation path for the liquid including the chamber. The path includes a supply channel for supplying the liquid to the chamber, a collection channel for collecting the liquid from the chamber, a circulation pump which supplies the collected liquid to the supply channel, and a pressure adjustment unit configured to adjust a pressure on the liquid to be supplied to the supply channel. A pressure P21 on the liquid supplied to the chamber while the pump is stopped, a pressure P22 on the liquid supplied to the chamber while the pump is driven, and a pressure loss ΔP from the adjustment unit to the chamber while the pump is driven satisfy P22>P21 and P22−ΔP<0.

A liquid ejection head includes a pressure chamber communicating with an ejection port, an ejection element which ejects the liquid from the port, and a circulation path for the liquid including the chamber. The path includes a supply channel for supplying the liquid to the chamber, a collection channel for collecting the liquid from the chamber, a circulation pump which supplies the collected liquid to the supply channel, and a pressure adjustment unit configured to adjust a pressure on the liquid to be supplied to the supply channel. A pressure P21 on the liquid supplied to the chamber while the pump is stopped, a pressure P22 on the liquid supplied to the chamber while the pump is driven, and a pressure loss ΔP from the adjustment unit to the chamber while the pump is driven satisfy P22>P21 and P22−ΔP<0.