A liquid discharge head includes a plurality of nozzles through which a liquid is discharged, the plurality of nozzles arrayed in a nozzle array direction, a plurality of pressure chambers respectively communicating with the plurality of nozzles, a plurality of individual channels respectively communicating with the plurality of pressure chambers, a common channel communicating with each of the plurality of individual channels, an individual-channel member including the plurality of pressure chambers and the plurality of individual channels, a common-channel member including the common channel, and a partition between the individual-channel member and the common-channel member. The partition includes a plurality of through-hole regions each connecting the common channel and the plurality of individual channels, and a plurality of recoverably-deformable regions facing the common channel.

Examples include a fluid ejection die. Examples comprise an ejection nozzle and an ejection chamber fluidly connected to the ejection nozzle. A fluid input hole is fluidly connected to the ejection chamber. A fluid output channel is also fluidly connected to the ejection chamber, and a fluid output hole is fluidly connected to the fluid output channel. Examples further comprise a fluid pump disposed in the fluid output channel to pump fluid from the ejection chamber out of the fluid output hole.

A filter unit has a filter chamber disposed in a channel through which liquid is to be supplied to a liquid discharge unit. The filter unit has a filter and a partition. The filter is disposed in the filter chamber, inclined relative to a horizontal direction. The filter separates the filter chamber into an upstream chamber the liquid to be supplied and a downstream chamber in communication with the liquid discharge unit. The partition has a wall surface facing the filter. The partition separates the upstream chamber into a first chamber the liquid to be supplied to and a second chamber adjacent to the filter. The filter unit has, in an upper portion of the partition, an opening that allows communication between the first chamber and the second chamber.

A liquid ejection head including a substrate, an energy generating element provided on the substrate, a film provided on the substrate and the energy generating element, and a flow path forming member provided on the substrate, forming a flow path of a liquid between the flow path forming member and the substrate, and having an ejection orifice at a position faced with the energy generating element, characterized in that the substrate has a supply path of the liquid communicating with the flow path, the flow path forming member has a structure protruding toward the supply path, and a peripheral shape of a distal end portion of the structure is a curved surface shape.

A channel structure includes a base body having a first surface, a second surface that is opposite from the first surface, and a side surface that extends in a direction intersecting the first surface. The base body includes a first channel having a supply port into which a liquid is supplied, a liquid storing chamber formed in the first surface and storing the liquid, a second channel having a discharge port through which the liquid in the liquid storing chamber is discharged, and a pressure adjusting unit that supplies the liquid from the first channel to the liquid storing chamber according to pressure in the liquid storing chamber and that located between the first surface and the second surface. The supply port is formed in the second surface of the base body or formed in the side surface of the base body.

A liquid discharging head includes a nozzle plate having a plurality of nozzles from which liquid is discharged; a plurality of individual liquid chambers that are communicably connected to the plurality of nozzles, respectively; a common liquid chamber that supplies liquid to the plurality of individual liquid chambers; and a circulation common liquid chamber that leads to a plurality of circulation channels. A part of the common liquid chamber overlaps the circulation common liquid chamber from a direction in which liquid is discharged from the nozzles, and another part of the common liquid chamber overlaps the circulation common liquid chamber from a direction orthogonal to both the direction in which liquid is discharged from the nozzles and a direction in which the nozzles are aligned.

A liquid discharge head includes a plurality of nozzles to discharge a liquid, a plurality of individual chambers communicating with the plurality of nozzles, respectively, a supply-side common chamber communicating with each of the plurality of individual chambers, and a recovery-side common chamber communicating with each of the plurality of individual chambers. The supply-side common chamber and a part of the recovery-side common chamber are aligned in a longitudinal direction of the plurality of individual chambers orthogonal to a nozzle array direction along Which the plurality of nozzles is arrayed.

A droplet deposition head includes: one or more manifold components, providing one or more fluid inlets, each of which is connectable to a fluid supply system so that the head can receive a corresponding droplet fluid; and two or more arrays of fluid chambers, each chamber being provided with a respective actuating element and a respective nozzle, each actuating element being actuable to eject a droplet of fluid in an ejection direction through the corresponding one of the nozzles, each array extending in an array direction. The head extends, in the ejection direction, from a first end, at which the one or more fluid inlets are located, to a second end, at which the arrays of fluid chambers are located. One or more branched inlet paths are provided within the manifold components over a first portion of their height in the ejection direction, each of the branched paths being fluidically connected so as to receive fluid at a main branch thereof from a respective one of the fluid inlets, branching at one or more branching points into two or more sub-branches, and culminating in a plurality of end sub-branches, to which fluid is conveyed. A plurality of widening inlet chambers is provided within the manifold components over a second portion of their height in the ejection direction, the width of each widening inlet chamber in the array direction increasing with distance in the ejection direction from a first end to a second end thereof, the first end being fluidically connected so as to receive fluid from one or more of the branched paths and the second end being fluidically connected so as to supply fluid to one or more of the arrays. Each of the branched inlet paths is fluidically connected so as to supply fluid to two or more of the widening inlet chambers. Also provided are manifold components, which include a plurality of layers, for a droplet deposition head.

A liquid ejecting head including a flow path forming substrate on which a pressure generation chamber and a first liquid supply chamber communicating with the pressure generation chamber are formed, a vibration plate that is formed on one surface side of the flow path forming substrate, a piezoelectric element that is provided on the vibration plate at a position corresponding to the first pressure generation chamber, a first filter that is provided on the one surface side of the flow path forming substrate and in which a plurality of first liquid supply ports communicating with the first liquid supply chamber are formed, and a second filter that is provided on an upstream side of the first filter and provided with a plurality of second liquid supply ports, in which an inner diameter of the second liquid supply port is an inner diameter or larger of the first liquid supply port.

A liquid discharge apparatus includes a liquid discharge head including a nozzle plate including at least one nozzle configured to discharge liquid; at least one individual liquid chamber respectively communicating with the at least one nozzle; at least one individual supply channel respectively communicating with the at least one individual liquid chamber; and at least one individual collecting channel respectively communicating with the at least one individual liquid chamber. The apparatus further includes circuitry configured to store, in a memory, a backflow-inducing discharge amount at which the liquid in the individual collecting channel flows in a reverse direction toward the individual liquid chamber, in response to discharge of the liquid from the nozzle; and set a discharge amount from the nozzle equal to or greater than the backflow-inducing discharge amount, to cause the liquid to flow in the reverse direction in the individual collecting channel.