Systems and methods for degassing fluid are disclosed. An example fluid ejection device including a channel having an entrance and an exit; a supply slot in communication with the channel; a vent; a first bubble impeding structure at the entrance of the channel; and a second bubble impeding structure at an exit of the channel, the first and second bubble impeding structures to retain a bubble within the channel to enable the bubble to be vented through a vent and to deter the bubble from entering the ink supply slot.

A liquid jetting apparatus includes: individual channels; and first and second manifolds commonly provided for the individual channels. Each of the individual channels has: a nozzle; a first pressure chamber connected to the first manifold and extending along a plane orthogonal to a predetermined direction; a second pressure chamber connected to the second manifold and extending along the plane; a first connecting channel connected to the first pressure chamber and extending from the first pressure chamber; a second connecting channel connected to the second pressure chamber and extending from the second pressure chamber; and a link channel extending to be parallel to the plane, having a connected part connected to the first connecting channel and another connected part connected to the second connecting channel, linking the first connecting channel and the second connecting channel, and connected to the nozzle.

Systems and methods for degassing fluid are disclosed. An example fluid ejection device including a channel having an entrance and an exit; a supply slot in communication with the channel; a vent; a first bubble impeding structure at the entrance of the channel; and a second bubble impeding structure at an exit of the channel, the first and second bubble impeding structures to retain a bubble within the channel to enable the bubble to be vented through a vent and to deter the bubble from entering the ink supply slot.

A liquid ejection apparatus and a circulation state determination method capable of helping prevent problems caused by a malfunction. An ejection state detected after a lapse of a first period of time and an ejection state detected after a lapse of a second period of time shorter than the first period of time are compared with each other to detect whether an ink circulation operation is performed faultily.

A liquid container includes a main body portion having a bottom part and a side wall part, so as to store liquid in a containing region enclosed by the bottom part and the side wall part, and a lid portion that covers the containing region from above. The lid portion has a plurality of openings, which include a liquid flow inlet configured to allow the liquid to flow into the containing region, and a liquid flow outlet configured to allow the liquid to flow out from the containing region to a feed destination. When viewed in the up and down direction, the plurality of openings are disposed on an imaginary circle whose center is a center of the containing region, with equal intervals.