Abstract: A liquid discharge head includes a flow passage substrate which is formed with individual flow passages, the individual flow passages including nozzles and pressure chambers communicated with the nozzles respectively, the pressure chambers being open on a surface of the flow passage substrate; a sealing member which is adhered to the surface via an adhesive and which seals the pressure chambers; and an actuator substrate which has a piezoelectric layer adhered to a surface of the sealing member on a side opposite to the flow passage substrate via an adhesive and individual electrodes formed on a side opposite to the sealing member with respect to the piezoelectric layer. The sealing member is composed of a material different from a material of the piezoelectric layer; and the surface has an adhesion area to which the sealing member is adhered and a non-adhesion area to which the sealing member is not adhered.

Abstract: A liquid discharge head includes: a first pressure chamber group formed by pressure chambers arranged in a first direction; a second pressure chamber group formed by pressure chambers arranged in the first direction, and disposed side by side with the first pressure chamber group in a second direction; a first common channel extending in the first direction and communicating with the pressure chambers composing the first pressure chamber group; a second common channel extending in the first direction and communicating with the pressure chambers composing the second pressure chamber group; a first dummy pressure chamber disposed on one side in the first direction relative to the first pressure chamber group; and a second dummy pressure chamber disposed on the one side in the first direction relative to the second pressure chamber group.

Abstract: There is provided liquid discharge head including: channel substrate which has first surface; and actuator substrate having second surface. A trap chamber configured such that the adhesive is trapped in the trap chamber in a case that the first and second surfaces are adhered to each other, an inflow channel configured such that the adhesive flows into the inflow channel, and an atmosphere communicating channel are formed in the channel substrate. The trap chamber has first and second ends in first direction and first and second ends in second direction. End of the inflow channel is located at the first end in the first direction and the second end in the second direction of the trap chamber. End of the atmosphere communicating channel is located at the second end in the first direction and the first end in the second direction of the trap chamber.

Abstract: A liquid discharge head includes: nozzles aligned on a nozzle surface; a supply manifold configured that a liquid is supplied therein from the outside of the liquid discharge head; a return manifold which is arranged between the nozzle surface and the supply manifold in a first direction, which is configured that the liquid is flown out therefrom to the outside of the liquid discharge head, and which is provided with a return damper part; and individual flow channels each of which corresponds to one of the nozzles. Each of the individual flow channels has a return throttle channel communicating the corresponding nozzle with the return manifold and being arranged between the return manifold and the nozzle surface in the first direction. The return manifold has a compliance larger than a compliance of the supply manifold.

Abstract: There is provided a liquid discharging head including: a pressure chamber configured to apply a pressure to a liquid so as to discharge the liquid from a nozzle; a descender arranged to overlap, in a plan view, with the nozzle and communicating the pressure chamber and the nozzle with each other; at least one return throttle channel connected to the descender; and a return manifold which communicates with the at least one return throttle channel and which is configured to receive the liquid not having been discharged from the nozzle. A cross section of the descender orthogonal to a depth direction of the descender is a non-circular shape having a major axis and a minor axis. The at least one return throttle channel is connected to at least one of a first end side of the minor axis and a second end side of the minor axis.

Abstract: A liquid discharge head is provided, the liquid discharge head comprising a plurality of individual channels, a first manifold connected to the plurality of individual channels, a second manifold connected to the plurality of individual channels, and a bypass channel connecting the first manifold and the second manifold and being distinct from the individual channels. A flow channel resistance Rct brought about by the plurality of individual channels, a flow channel resistance Rbp of the bypass channel, a bending loss ?P provided when the liquid flows from the first manifold via the bypass channel to the second manifold, and a flow rate Q of the liquid flowing through the bypass channel fulfill a relationship of: 0.5<[Rct/(Rbp+(?P/Q))]<2.0.

Abstract: A liquid discharge head includes: a first pressure chamber group formed by pressure chambers arranged in a first direction; a second pressure chamber group formed by pressure chambers arranged in the first direction, and disposed side by side with the first pressure chamber group in a second direction; a first common channel extending in the first direction and communicating with the pressure chambers composing the first pressure chamber group; a second common channel extending in the first direction and communicating with the pressure chambers composing the second pressure chamber group; a first dummy pressure chamber disposed on one side in the first direction relative to the first pressure chamber group; and a second dummy pressure chamber disposed on the one side in the first direction relative to the second pressure chamber group.

Abstract: There is provided a liquid discharge head, including: a nozzle member formed having nozzle rows extending in a first direction, the nozzle rows being arranged in a second direction; driving elements; a first channel member disposed at one side of the nozzle member in a third direction; a second channel member disposed at the one side of the first channel member in the third direction; and a third channel member disposed at the one side of the second channel member in the third direction.

Abstract: There is provided a liquid discharge head including: a plurality of first individual channels; a first supply manifold; a first return manifold; a plurality of second individual channels; a second supply manifold; a second return manifold; and a first bypass channel communicating the first supply manifold and the second return manifold. The first bypass channel includes: a first supply connecting channel, a first return connecting channel, and a first connecting channel. Channel resistance in one of the first supply connecting channel and the first return connecting channel is greater than channel resistance in the first connecting channel.

Abstract: A liquid ejection head, including: a first head unit; a second head unit shifted with respect to the first head unit in both of a first direction in which nozzles of the head units are arranged and a second direction orthogonal to the first direction and disposed so as to overlap the first head unit in the second direction; and a first wiring member having flexibility and drawn from the second head unit in the second direction toward the first head unit, wherein the first wiring member includes a large-width portion on which a drive circuit is mounted and a small-width portion having a width in the first direction smaller than a width of the large-width portion in the first direction, and wherein the small-width portion passes through a space existing next to the first head unit in the first direction and extends in the second direction.

Abstract: There is provided a liquid discharging head including: a plurality of supply manifolds configured to receive a liquid to be discharged from a plurality of nozzles and provided side by side with each other; a supply integration channel arranged on a first side in a longitudinal direction of the supply manifolds; a first connecting channel connecting the supply integration channel and a first supply manifold of the supply manifolds; and a second connecting channel connecting the supply integration channel and a second supply manifold, of the supply manifolds, being adjacent to the first supply manifold in a short direction of the first supply manifold. An outlet of the first connecting channel is arranged on the first side in the longitudinal direction of the supply manifolds; and an outlet of the second connecting channel is arranged on a second side in the longitudinal direction of the supply manifolds.

Abstract: A liquid discharge head is provided, which includes a nozzle plate which is formed with nozzles, and a channel member which is formed with pressure chambers and connecting channels for connecting the pressure chambers and the nozzles. The connecting channel includes a plurality of portions which have mutually different channel cross-sectional areas. The plurality of portions includes a first portion which is adjacent to the pressure chamber, and a second portion which is adjacent to the first portion, the first portion being interposed between the pressure chamber and the second portion. The first portion has the smallest channel cross-sectional area of those of the plurality of portions. S1?0.3×S0 and S1?0.7×S2 are fulfilled (S0: channel cross-sectional are of the pressure chamber, S1: channel cross-sectional area of the first portion, S2: channel cross-sectional area of the second portion).

Abstract: A liquid discharge head is provided, including a channel unit and a piezoelectric actuator stacked on the channel unit. The channel includes a channel including a nozzle and a pressure chamber. The piezoelectric actuator includes a piezoelectric element which includes a piezoelectric layer; a constant electric potential electrode arranged between the piezoelectric layer and the channel unit; and a driving electrode arranged on a surface of the piezoelectric layer opposite to the constant electric potential electrode. A relational expression of 0.5107? + 18.476 < ? < 0.7326? + 54.409 is fulfilled assuming that ? represents a length in a transverse direction orthogonal to both of one direction and a stacking direction of the pressure chamber and ? represents a length in the transverse direction of the driving electrode.

Abstract: A liquid discharging head is provided with: individual channels; a first common channel; and a second common channel. The individual channels include: first individual channels which have first pressure chambers and which are aligned in a second direction to form a first individual channel array, and second individual channels which have second pressure chambers and which are aligned in the second direction to form a second individual channel array; the first individual channel array and the second individual channel array are arranged in a third direction. The first common channel communicates with both of the first individual channels and the second individual channels; and the first pressure chambers and the second pressure chambers do not overlap with the second common channel in a first direction, and do not overlap with each other in the second direction.

Abstract: A liquid jetting apparatus jetting a liquid onto a recording medium conveyed in a first direction includes head units arranged in a second direction orthogonal to the first direction. One head unit includes nozzle chips; one nozzle chip has a nozzle arrangement area wherein nozzles are aligned in a third direction crossing the first and second directions. The nozzle chip is arranged to be shifted relative to another nozzle chip in a direction crossing the first and second directions and different from the third direction. The head unit has a first overlapping portion wherein nozzle arrangement areas of first and second nozzle chips included in the nozzle chips partially overlap with each other in the first direction. The liquid jetting apparatus has a second overlapping portion wherein nozzle arrangement areas of third and fourth nozzle chips included in the head units partially overlap with each other in the first direction.

Abstract: A liquid discharge apparatus includes a channel member defining a nozzle and a pressure chamber in communication with the nozzle; an actuator which applies pressure to liquid in the pressure chamber, and a controller which applies a drive signal to the actuator. The drive signal includes a rectangular main pulse and a rectangular cancel pulse applied after the main pulse within one discharge period. The actuator is driven by the drive signal in a pull-and-push method to discharge the liquid from the nozzle. If f (kHz) refers to a drive frequency of the drive signal, if Tw (?sec) refers to a time length from a falling edge of the main pulse to a rising edge of the cancel pulse, and if Tc (?sec) refers to a pulse width of the cancel pulse, then the following expression holds: 50?f??11.3×(Tw+Tc)+120.

Abstract: Provided is a spray chamber including a sample introduction port portion into which a gas flow containing sample droplets that have been atomized by a nebulizer is introduced, a discharge port portion that discharges at least a part of the gas flow introduced into the sample introduction port portion to the outside, and a flow passage tube portion that has the sample introduction port portion on one end portion thereof and the discharge port portion on the other end portion thereof and serves as a flow passage for the introduced gas flow, wherein the flow passage tube portion includes a first tube portion having the discharge port portion on one end portion thereof and a second tube portion having the sample introduction port portion on one end portion thereof, the spray chamber includes a double tube portion.

Abstract: A liquid jetting apparatus includes: a liquid jetting head having: a plurality of kinds of individual channels, a jetting surface formed with a plurality of kinds of nozzles from which a plurality of kinds of liquids are jetted, respectively, a plurality of kinds of inflow channels, a plurality of kinds of outflow channels; valves provided at least on the plurality of kinds of inflow channels; a wiper configured to be movable relative to the liquid jetting head in a direction along the jetting surface; a first motor configured to move the liquid jetting head and the wiper relative to each other; and a controller. The controller executes a wiping by driving the first motor in a state that the valves are closed.

Abstract: A liquid discharge head includes: a first pressure chamber group formed by pressure chambers arranged in a first direction; a second pressure chamber group formed by pressure chambers arranged in the first direction, and disposed side by side with the first pressure chamber group in a second direction; a first common channel extending in the first direction and communicating with the pressure chambers composing the first pressure chamber group; a second common channel extending in the first direction and communicating with the pressure chambers composing the second pressure chamber group; a first dummy pressure chamber disposed on one side in the first direction relative to the first pressure chamber group; and a second dummy pressure chamber disposed on the one side in the first direction relative to the second pressure chamber group.

Abstract: The sample introduction device includes a nebulizer that atomizes a sample liquid; a spray chamber that has one end into which a spray port part of the nebulizer is inserted and the other end from which at least a part of liquid droplets of the sample liquid sprayed from the spray port part is discharged to an outside; and a heating electromagnetic wave radiation unit that is arranged outside the spray chamber, wherein the heating electromagnetic wave radiation unit performs radiation of heating electromagnetic waves from the outside of the spray chamber toward at least a part of the spray chamber other than a part into which the spray port part of the nebulizer is inserted.