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 valve jet printer includes a solenoid coil and a plunger rod having a magnetically susceptible shank. A first end of the shank and at least a portion of the shank are received within a bore of the solenoid coil. The printer also includes a nozzle including an orifice extending therethrough and a spring biasing a second end of the shank toward the nozzle. The second end of the plunger rod includes a tip formed of perfluoroelastomer (FFKM). The second end of the shank includes a cup-shaped cavity having a convex bottom and a circular side. The tip includes a concave base and an annular flange. In an assembled state, the concave base of the tip contacts the convex bottom of the cup-shaped cavity, and the end of the circular side opposite the convex bottom is rolled over the annular flange thereby securing the tip in the cup-shaped cavity.

Abstract: An image forming apparatus includes a housing, a movable body, a rack, a gear, a stepping motor, and a first action body. The movable body moves between a first position and a second position with respect to the housing. The first action body acts on the movable body. When an output shaft of the stepping motor rotates in a first rotation direction, the gear rotates to move the movable body in a first direction from the second position toward the first position. The first action body applies a pressing force toward a second direction opposite to the first direction to the movable body moving in the first direction beyond the first position. The pressing force is smaller than a force enough to rotate the output shaft of the stepping motor by one step in a second rotation direction opposite to the first rotation direction.

Abstract: A print head includes a first piezoelectric element that includes a first electrode supplied with a drive signal and a second electrode supplied with a reference voltage signal and is displaced by a difference in electric potential between the first electrode and the second electrode, a cavity that is filled with a liquid ejected from a nozzle along with the displacement of the first piezoelectric element, a vibration plate that is disposed between the cavity and the first piezoelectric element, a first switch circuit that switches between supplying and not supplying the drive signal to the first electrode, and a second switch circuit that switches between electrically connecting and not electrically connecting the first electrode and the second electrode depending on an electric potential of the drive signal.

Abstract: A controller is configured to determine which of a first position and a second position is located at a farther downstream side in a moving direction of an ejector and to set a determined position as a turn position. The first position is a first distance away from an image formation end position in the moving direction. The second position is a second distance away from an image formation start position in the moving direction. The image formation end position is an end position of image formation onto a sheet in a conveyance process of the ejector before turning at the turn position. The image formation start position is a start position of image formation onto the sheet in a conveyance process of the ejector after turning at the turn position. The second distance is longer than the first distance.

Abstract: A liquid ejecting head including a plurality of pressure chambers in communication with nozzles that eject a liquid, a diaphragm that includes layers including a first layer and a second layer and that constitutes wall surfaces of the plurality of pressure chambers, a plurality of piezoelectric elements formed on a first region of the diaphragm, the piezoelectric elements each being formed to correspond to a corresponding one of the pressure chambers, and a barrier layer that is in contact with an interface between the first layer and the second layer in a second region of the diaphragm, the second region surrounding the first region.

Abstract: There is provided a driving circuit that drives a piezoelectric element having a first electrode that is supplied a first voltage signal and a second electrode that is supplied a second voltage signal, and driven by a potential difference between the first electrode and the second electrode, the driving circuit including: a first voltage signal generation circuit that outputs the first voltage signal; a second voltage signal generation circuit that outputs the second voltage signal; and a switch circuit in which the first voltage signal is input from one end and the other end is electrically connected to the first electrode, a voltage value of the first voltage signal approaches a voltage value of the second voltage signal in a shift period from a first mode that is shifted after power is turned on to a second mode for driving the piezoelectric element.

Abstract: A liquid ejection head includes a first pressure chamber row having a plurality of first pressure chambers respectively communicating with a plurality of ejection orifices that eject liquid and arranged along a predetermined direction, a second pressure chamber row having a plurality of second pressure chambers respectively communicating with a plurality of ejection orifices that eject liquid and arranged along the predetermined direction, a first flow path for supplying the liquid to the plurality of first pressure chambers, and a second flow path for recovering the liquid from the plurality of second pressure chambers. Part of the first pressure chamber row is disposed to overlap the first flow path, and part of the second pressure chamber row is disposed to overlap the second flow path, as viewed from an ejection direction of the liquid.

Abstract: A liquid ejection head configured to eject a liquid through nozzles includes plural head sections including a first head section and a second head section. Each of the plurality of head sections includes plural nozzle rows. One of the plural nozzle rows of the first head section is supplied with an undercoat-forming liquid containing an undercoat-forming pigment with an average particle diameter of at least 200 nm at a concentration of at least 7 percent by mass. Each of the plural nozzle rows of the second head section is supplied with an image-forming liquid containing an image-forming pigment with an average particle diameter of less than 200 nm at a concentration of less than 7 percent by mass.

Abstract: A head holding mechanism and an inkjet printer are provided. The head holding mechanism includes a head holding member that holds an inkjet head, a carriage side member attached to the carriage and to which the head holding member is fixed, and a fixing member for fixing the head holding member to the carriage side member. The fixing member is movably held by the carriage side member. The fixing member is movable between an engagement position where the fixing member engages with the head holding member to fix the head holding member to the carriage side member, and a disengagement position where the engagement state of the head holding member and the fixing member is released and the head holding member is detachable from the carriage side member.

Abstract: The present invention may provide an ink jet head and an ink jet recording apparatus capable of satisfactorily removing remaining air bubbles from a pressure chamber. The present invention may include: a common ink chamber that stores ink; at least one pressure chamber that communicates with the common ink chamber and causes a volume fluctuation using pressure generation means; a nozzle that communicates with the pressure chamber; a nozzle-part discharge path that communicates with the pressure chamber near the nozzle inside the pressure chamber and discharges ink out of the pressure chamber; and at least one discharge path that communicates with the pressure chamber at a position apart from the nozzle inside the pressure chamber and discharges ink out of the pressure chamber.

Abstract: This inkjet head comprises: a nozzle plate including a plurality of nozzles; a vibration plate including a pressure chamber to store ink to be ejected from the nozzle; a spacer plate containing a piezoelectric layer to apply pressure to the pressure chamber; a vibration board provided between the pressure chamber and the piezoelectric layer to transmit deformation of the piezoelectric layer to the pressure chamber; and an intermediate substrate between the pressure chamber plate and the nozzle plate, the intermediate substrate including a communication flow path that communicates with the nozzle and the pressure chamber. The nozzle plate includes: an individual circulation flow path provided for each of the plurality of nozzles to discharge ink; and a common circulation flow path into which a plurality of individual circulation flow paths merge.

Abstract: A liquid ejecting head includes an element substrate including a common liquid chamber connected to a liquid supply source, a pressure chamber connected to the common liquid chamber and including inside an element to generate energy used for ejecting liquid, a bubble generating chamber connected to the common liquid chamber and including inside a pump to cause a flow of the liquid, and a connection flow path connecting the pressure chamber and the bubble generating chamber. The liquid ejecting head includes a first anti-cavitation film over the element to generate the energy and a second anti-cavitation film over the pump, and the first anti-cavitation film and the second anti-cavitation film have different film thicknesses.

Abstract: A method is provided that is implemented on a control device connected with an inkjet printer, which includes an inkjet head having an ink discharging surface, a head scanning unit reciprocating the inkjet head relative to a recording sheet along a scanning direction parallel to the ink discharging surface, and a wave shape generating mechanism deforming the recording sheet in a predetermined wave shape that has tops of portions protruding in a first direction toward the ink discharging surface and bottoms of portions recessed in a second direction opposite to the first direction alternately arranged along the scanning direction, the method including acquiring gap information related to a gap between the ink discharging surface and each individual one of the tops and the bottoms on the recording sheet, and determining whether the gap information acquired for each individual one of the tops and the bottoms is abnormal.

Abstract: A recording device includes a head including a plurality of nozzles discharging ink droplets and a head including a plurality of nozzles discharging ink droplets of a color identical to that of the ink droplets, a driving circuit configured to drive the former head at a drive voltage and drive the latter head by another drive voltage, an input unit configured to receive an input of selection information selected, based on comparison between a print image printed by the former head and a plurality of other print images G2 printed by the latter head, with the other drive voltage being changed individually, and a control unit configured to control the drive voltage and the other drive voltage, based on the selection information input from the input unit.

Abstract: A print head includes a piezoelectric element that includes a first electrode supplied with a drive signal and a second electrode supplied with a reference voltage signal and is displaced by a difference in electric potential between the first electrode and the second electrode, a cavity that is filled with a liquid ejected from a nozzle along with the displacement of the piezoelectric element, a vibration plate that is disposed between the cavity and the piezoelectric element, a gate circuit that is electrically connected to a ground, a first switch circuit that switches between supplying and not supplying the drive signal to the first electrode, and a second switch circuit that switches between electrically connecting and not electrically connecting the gate circuit and the first electrode.

Abstract: Provided are an image processing apparatus, an image processing method, a dither mask set, and an image recording apparatus capable of suppressing occurrence of banding and color unevenness without productivity decrease. Halftone processing is performed with respect to image data of a first color, in a range of a part of a recording duty, using a dither mask that realizes a first nozzle jetting rate in which a nozzle jetting rate of an end part nozzle is suppressed to be smaller than a nozzle jetting rate of a central nozzle. Further, halftone processing is performed with respect to image data of a second color different from the first color, using a dither mask that realizes a second nozzle jetting rate having smaller difference between the nozzle jetting rate of the end part nozzle and the nozzle jetting rate of the central nozzle than that in the first nozzle jetting rate.

Abstract: A liquid discharge apparatus includes a liquid discharge head, a liquid receiving portion, an absorbing member, a case, and a shape holder. The liquid discharge head discharges liquid. The liquid receiving portion receives the liquid dummy-discharged from the liquid discharge head. The absorbing member absorbs the liquid. The case is made of a non-liquid permeable material, to house the absorbing member. The shape holder holds a shape of the case.

Abstract: An example printing subassembly includes a frame having first and second members spaced extending in a first direction. The frame can be removably coupled to a printing device. The first and second members are spaced from each other in a second direction, which is orthogonal to the first direction. The first and second directions are also orthogonal to a third direction. A printbar is coupled to the frame. An alignment system is coupled to the frame and includes at least four alignment features cooperating to constrain translation of the printing subassembly in the third direction and rotation about axes in the first and second directions with respect to the printing device.

Abstract: A flow path forming substrate on which a nozzle plate including a plurality of nozzles is mounted forms a supply flow path from a shared supply path shared for liquid supply to the plurality of nozzles, and an individual supply path branching from the shared supply path and leading to a pressure chamber for each of the nozzles, and forms a collecting flow path from an individual collecting path for each of the nozzles communicated with the communication flow path for each of the nozzles communicating with the nozzles and pressure chambers, and a shared collecting path shared for liquid collection from the plurality of nozzles by joining to the individual collecting path. The shared supply path is liquid-tightly closed by a supply-side flexible plate having flexibility, and the collecting flow path is liquid-tightly closed by a collecting-side flexible plate having flexibility over a flow path area.