Abstract: A liquid jetting apparatus includes: liquid jetting heads which are arranged along a predetermined arrangement direction and each of which has a first nozzle to jet a first liquid and a second nozzle to jet a second liquid, a first tank in which the first liquid is stored, a second tank in which the second liquid is stored, first supply channels which connect the first tank and the liquid jetting heads, second supply channels which connect the second tank and the liquid jetting heads, first return channels which connect the liquid jetting heads and the first tank, and second return channels which connect the liquid jetting heads and the second tank. The first tank and the second tank are arranged to deviate from each other in the arrangement direction.

Abstract: A liquid discharge head includes an individual channel which includes: a nozzle; a pressure chamber; a descender of which one end in the first direction is nearer to the nozzle than the other end; and a second connecting channel connecting a second common channel and the one end of the descender. A central axis of the nozzle is positioned between the second common channel and a central axis of the descender in the second direction. The descender includes a first portion including the one end and a second portion positioned between the pressure chamber and the first portion in the first direction. In an end, of the descender, opposite to the second connecting channel in the second direction, an inner wall defining the one end of the first portion protrudes toward the second connecting channel in the second direction beyond an inner wall defining the second portion.

Abstract: A liquid discharging head, having a plurality of individual flow paths, a common flow path, a damper, a heater pattern, a heat source, and a connecting pattern, is provided. The individual flow paths are arrayed in a first direction. The common flow path extends in the first direction throughout the individual flow paths and is connected with the individual flow paths. The damper extends in the first direction throughout the individual flow paths. A part of the damper forms an inner face that defines an end of the common flow path in a second direction. The heater pattern is provided to the damper. The connecting pattern connects the heater pattern with the heat source. In a range, in which in the first direction the individual flow paths are arranged, the heater pattern extends in the first direction without inclining with respect to the first direction at 45 degrees or larger.

Abstract: There is provided a liquid discharge head including: first and second common channels extending in a first direction; and a plurality of individual channels each including: a supplying part, a descender part, and a returning part. The returning part includes: a throttle part and a wide part. Each of a plurality of nozzles is located at a position at which each of the plurality of nozzles overlaps with the wide part in a second direction. At a throttle-starting position which is a boundary between the throttle part and the wide part, a length in the second direction of the throttle part and a length in the second direction of the wide part are same.

Abstract: A liquid ejection head includes pressure chambers arranged in a first direction, first communicating portions, a first common channel extending in the first direction, second communicating portions, a second common channel extending in the first direction, and a damper film. The second common channel includes a first portion and a second portion connecting the first portion and the second communicating portions. The second portion extends from the first portion in a second direction orthogonal to the first direction toward the pressure chambers and is located to a side of the first common channel opposite to the pressure chambers in a third direction orthogonal to the first direction and the second direction. The damper film is located to a side of the second portion opposite in the third direction to the first common channel.

Abstract: There is provided a liquid discharge head, including: a channel member that includes a first plate and a second plate and is formed having individual channels and a common channel. The first plate is formed having nozzles. The second plate has a first surface and a second surface at a side opposite to the first surface. The second surface of the second plate is joined to the first plate. The second plate has through holes passing through the second plate from the first surface to the second surface. The second plate is formed having first recesses having ends connected to the through holes. The individual channels include: the nozzles; pressure chambers; descenders defined by the through holes and connecting the nozzles and pressure chambers; and communication channels defined by the first recesses and allowing the descenders to communicate with the common channel. The first recesses are formed in the first surface.

Abstract: A liquid discharging head includes: a pressure chamber; a descender extending from the pressure chamber in a first direction; a communicating channel extending from the descender in a second direction crossing the first direction; a first return channel and a second return channel connecting the communicating channel and a return manifold; and a nozzle connected to the communicating channel. The first return channel and the second return channel are connected, with respect to the communicating channel, at facing positions, respectively, the facing positions facing each other in a direction orthogonal to the second direction; and the nozzle is provided, in the communicating channel, at a position which is offset from an axis of the descender, and which is sandwiched between a connecting location of the first return channel with respect the communicating channel and a connecting location of the second return channel with respect to the communicating channel.

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: There is provided a liquid discharge head including a channel unit that includes plates stacked on top of each other in a first direction and is formed having individual channels, a first common channel, and a second common channel. The first and second common channels communicate with the individual channels. Each individual channel includes a nozzle, a pressure chamber, a descender, a first throttle channel, and a second throttle channel. The plates include a nozzle plate, a pressure chamber plate, and a first plate formed having a first through hole that constitutes part of the descender. A center portion of the nozzle is positioned at a side opposite to the second throttle channel in the second direction with respect to a center portion of the descender.

Abstract: There is provided a liquid discharging head including: first and second individual channel rows having first individual channels and second individual channels aligned in a first direction, respectively; first and second common channels having first and second connecting parts, respectively; and a connecting channel connecting the plurality of first individual channels and the plurality of second individual channels to one another. The connecting channel has: a common connecting channel which does not have a connecting part with respect to the liquid supply source and which is communicated with the plurality of first individual channels and the plurality of second individual channels; a plurality of first individual connecting channels and a plurality of second individual connecting channels which connect the plurality of first individual channels and the plurality of second individual channels, respectively, to the common connecting channel.

Abstract: There is provided a liquid discharge head including a first channel unit and a second channel unit. The first channel unit includes: a first joining surface; a tube disposed on an opposite surface opposite to the first joining surface; an outside portion; and a coupling portion. The second channel unit is joined to the first joining surface. An end of the outside portion and an end of the coupling portion in an orthogonal direction orthogonal to the first joining surface extend to an identical position in the orthogonal direction. The tube includes a circumferential portion that is exposed outside and extends in the orthogonal direction to the identical position to which the end of the outside portion and the end of the coupling portion extend.

Abstract: A liquid ejecting head includes: a plurality of liquid ejecting modules each including a plurality of head units and a first plate, a second plate, and a protrusion. The plurality of liquid ejecting modules is arrayed in a first direction. The first plate has a first surface to which the plurality of head units is fixed and a second surface opposite to the first surface. The first plate has a thickness in a second direction. The second plate is disposed at the second surface of the first plate so as to extend along the plurality of liquid ejecting modules. The protrusion protrudes from the second plate in a direction away from the first plate.

Abstract: There is provided a liquid discharge head including: a first plate formed with an individual channel which includes a pressure chamber; a second plate; a vibration plate; and a piezoelectric element. The second plate has a pair of communicating channels arranged to sandwich an accommodating space, which accommodates the piezoelectric element, therebetween. A spacing distance between mutually close parts in a pair of inner circumferential surfaces of the pair of communicating channels, respectively, is greater on a side of one ends in the stacking direction of the pair of communicating channels than on a side of the other ends in the stacking direction of the pair of communicating channels, the one ends being close to the individual channel in the stacking direction.

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: 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 discharge apparatus including: at least one liquid discharge head; and a holding member holding the liquid discharge head. The liquid discharge head includes: a nozzle plate; a first channel member stacked on the nozzle plate in a first direction and including a channel through which liquid is supplied to the nozzles, and a second channel member including at least one plate and arranged between the nozzle plate and the first channel member in the first direction, the second channel member including individual channels connected to the nozzles. The second channel member includes a securing portion secured to the holding member and provided at a position closer to the nozzle plate than the first channel member.

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: There is provided a liquid discharge head including: a first plate formed with an individual channel which includes a pressure chamber; a second plate; a vibration plate; and a piezoelectric element. The second plate has a pair of communicating channels arranged to sandwich an accommodating space, which accommodates the piezoelectric element, therebetween. A spacing distance between mutually close parts in a pair of inner circumferential surfaces of the pair of communicating channels, respectively, is greater on a side of one ends in the stacking direction of the pair of communicating channels than on a side of the other ends in the stacking direction of the pair of communicating channels, the one ends being close to the individual channel in the stacking direction.

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: A liquid ejection head includes a nozzle surface having a plurality of nozzles, a channel structure stacked on the nozzle surface in a stacking direction, and a supply channel structure formed of a material having a lower thermal conductivity than a material of the channel structure. The channel structure has a liquid ejection channel communicating with the nozzles. The supply channel structure has a supply channel communicating with the liquid ejection channel. The supply channel structure has a covering portion covering at least a portion of an end surface on a side of the channel structure in a width direction orthogonal to the stacking direction.