A controller is configured to receive an output signal outputted from a light reception element. The controller is configured to perform: an existence detection of controlling a light emission element to emit light and detecting whether an ejection target exists at a facing position based on the output signal; and a distance detection of controlling the light emission element to emit light toward a surface of the ejection target and detecting a distance between the surface of the ejection target and a nozzle surface based on the output signal outputted from the light reception element upon receiving light reflected off the surface of the ejection target. An amount of change of the output signal with respect to change of the distance in the distance detection is larger than an amount of change of the output signal with respect to change of the distance in the existence detection.

A conveyer conveys an ejection target in a conveyance direction along a conveyance path including a facing position facing a nozzle surface of a liquid ejection head. A distance sensor outputs a distance signal that changes depending on a distance between the nozzle surface and a surface of the ejection target. A controller performs: receiving the distance signal outputted from the distance sensor and positional information relating to a position of the ejection target on the conveyance path; and during ejecting liquid from the nozzle to record an image on the ejection target, changing at least one of a determination condition and a coefficient based on the positional information, the determination condition being a condition for determining whether to interrupt recording of the image by referring to the distance signal, the coefficient being multiplied by a value of the distance signal when determining whether to interrupt recording.

An inkjet printer is provided, which is configured to acquire gap information related to a gap between an ink discharging surface and a recording sheet in each individual position of top-formed positions and bottom-formed positions within a predetermined wave-shape generating range, identify, when the predetermined wave-shape generating range includes a partial range in which the recording sheet is not placed, a top-formed position where the gap information has not been acquired and a bottom-formed position where the gap information has not been acquired, within the partial range, complement the unacquired gap information in the identified top-formed position with a value determined based on the respective pieces of gap information acquired in other top-formed positions, and complement the unacquired gap information in the identified bottom-formed position with a value determined based on the respective pieces of gap information acquired in other bottom-formed positions.

In a processing apparatus, with an inkjet print head, that processes individual items, a drive motor that operates a transport mechanism to transport the individual items in the x-direction of a Cartesian coordinate system past the inkjet print head in a printing position so as to execute a printing operation with the inkjet print head on each individual item. The drive motor arrangement also moves the inkjet print head in the y-direction into a first position that is any of an exchange position, the printing position, a cleaning position or a sealing position. The drive motor arrangement also moves the inkjet print head vertically, in the z-direction of the exchange position or the sealing position, into at least one other position that is either the printing position or the cleaning position.

An apparatus with an ink printing device generates imprints on items moving in a transport direction. The ink printing device displaces the ink cartridge, which is a single inkjet print head of at least 1 inch in width transverse to the transport direction, as well as in a vertical direction, and counter to the vertical direction. A movement mechanism of the printing module is provided to vertically raise and lower the inkjet print head. The movement mechanism has a mechanism for motorized movement of the inkjet print head, and a mechanism for manual displacement in the vertical direction.

A liquid droplet forming device for stably forming and ejecting a liquid droplet of a dispersion liquid containing settling particles includes an ejection head that ejects a liquid droplet of a liquid containing settling particles, and a control unit. The control unit controls a behavior of the ejection head by supplying an electrical signal. The ejection head includes a liquid holding portion that holds the liquid, a film-like member that has an ejection hole for ejecting the liquid droplet and that forms a liquid chamber, which holds the liquid, together with the liquid holding portion, and vibration applying means for vibrating the film-like member based on the electrical signal. The electrical signal includes an ejection signal for forming the liquid droplet by vibrating the film-like member, a stirring signal for vibrating the film-like member and a micro-vibration signal.

An ink-jet printing device according to the present invention includes: first and second nozzles each configured to discharge ink droplets onto a recording medium being conveyed; a calculation unit to calculate a landing position difference on the recording medium being conveyed at a conveyance speed based on first and second conveyance speeds and first and second landing position differences; and a timing control unit to control each of timings of ink droplet discharge from the first and second nozzles based on the landing position difference calculated by the calculation unit. This configuration allows appropriate correction of variance in the landing positions of ink droplets discharged from the nozzles.

A liquid droplet discharging apparatus includes: a first piezoelectric element that moves a head in a first direction; a second piezoelectric element that moves the head in a second direction opposite to the first direction; a movement unit that moves a medium in the first direction in accordance with a predetermined target movement amount; a transport amount measurement unit as a movement amount measurement unit that measures a movement amount of the medium in the first direction; and a drive control unit that controls driving of the first piezoelectric element and the second piezoelectric element. The drive control unit drives either one of the first piezoelectric element or the second piezoelectric element according to a difference BA between a target transport amount A as the target movement amount and a transport amount B as the movement amount measured from the transport amount measurement unit.

A method of depositing printing fluid on a sheet of corrugated media comprises determining a deformation of a sheet of corrugated media, adjusting control parameters for a plurality of nozzles based on the determined deformation, and depositing printing fluid from the plurality of nozzles onto the sheet of corrugated media according to the adjusted control parameters.

The printing apparatus is provided with a transport mechanism section that transports work, a printing mechanism section that has nozzles, which carry out printing by discharging an ink, as liquid droplets, onto the work transported by the transport mechanism section, and an adjustment section that adjusts a volume per single droplet of the ink discharged from the nozzles on the basis of a separation distance between the nozzles and the work, which is positioned directly below the nozzles.