Abstract: An inkjet recording apparatus includes a first ink tank that contains ink, a second ink tank that contains ink supplied from the first ink tank, a communication unit, having conductivity, communicates between the first ink tank and the second ink tank, an opening provided at one end of the communication unit connected to the second ink tank and opening to the second ink tank, an electrode portion provided in the second ink tank, of which a lower end position is located at or above a lower end position of the one end of the communication unit and at or below a highest position of the opening, and a detecting unit that detects an ink amount in the second ink tank in accordance with electrical properties between the electrode portion and the communication unit.

Abstract: A liquid supply system includes a liquid supply source, an injection head, a damper in communication with the injection head, a liquid supply path including an end in communication with the liquid supply source and another end in communication with the damper, a liquid supply device supplying the liquid from the liquid supply source toward the damper, a pressure control valve provided between the liquid supply source and the liquid supply device, and a controller controlling the liquid supply device to be actuated or to be stopped. The pressure control valve closes the liquid supply path while the liquid supply device stopped.

Abstract: There is provided an ink set including a water-based cleaning transportation liquid, and a disperse dye ink composition, in which the water-based cleaning transportation liquid includes water and at least one of an aromatic sulfonate formalin condensate and a lignin sulfonate as a dispersing agent I, without including a coloring material, and the disperse dye ink composition includes a disperse dye, water, and a dispersing agent II.

Abstract: An inkjet printer includes: a positive pressure space for a positive pressure for circulating ink along a circulation path to be applied; a negative pressure space for a negative pressure for circulating the ink along the circulation path to be applied; a positive-pressure-side air opening valve configured to selectively open and close the positive pressure space to a positive-pressure-side air opening path; a negative-pressure-side air opening valve configured to selectively open and close the negative pressure space to a negative-pressure-side air opening path; and a control unit configured to, when terminating circulation of the ink in the circulation path, drive the positive-pressure-side air opening valve to open the positive pressure space to the positive-pressure-side air opening path and then drive the negative-pressure-side air opening valve to open the negative pressure space to the negative-pressure-side air opening path.

Abstract: In an embodiment, a fluid ejection device includes a fluid feed slot formed in a printhead die and a plurality of printhead-integrated ink level sensors (PILS). A fluid ejection device may include a first PILS to sense an ink level of a first chamber in fluid communication with the fluid feed slot, the first PILS to detect an empty ink level of the first chamber when the fluid ejection device is at a first ink level state, and a second PILS to sense an ink level of a second chamber in fluid communication with the fluid feed slot, the second PILS to detect an empty ink level of the second chamber when the fluid ejection device is at a second ink level state, different than the first ink level state.

Abstract: A printing apparatus according to the present invention includes a storage chamber, a first communicating portion through which an ink tank communicates with the storage chamber, a second communicating portion through which a printhead is communicates with the storage chamber, and side walls arranged facing each other so as to form a channel in which ink flows from a side of the first communicating portion to a side of the second communicating portion in the storage chamber. The storage chamber includes a first space, and a second space located closer to the side of the second communicating portion than the first space, in which a distance between the side walls is set larger than in the first space. The apparatus includes a detecting unit arranged in the second space and detecting a liquid surface of ink.

Abstract: An attachment is mountable on a carriage in place of a liquid container that contains liquid and that is mounted on the carriage having a liquid jet head for jetting liquid, so that the attachment can supply liquid introduced from outside to the liquid jet head. The attachment has a pressure control means provided in a flow passage which is formed in an attachment body and through which the liquid introduced from the outside is supplied to the liquid jet head.

Abstract: An ink supply mechanism (50) provided with: a main tank (60); a sub-tank (70) for storing ink supplied from the main tank (60) and supplying the ink to an ink jet head (2); a first communication passage (52) one end of which communicates into the ink in the main tank (60) and the other end of which communicates into the ink in the sub-tank (70); and a second communication passage (53) one end of which communicates into the main tank (60) and the other end of which communicates with a position in the sub-tank (70) higher than the other end of the first communication passage (52), and part of which is disposed at a position higher than the liquid level of the ink in the main tank (60).

Abstract: An ink jet recording apparatus includes a recording head ejecting ink; a buffer tank temporarily storing the ink; a mounting unit to which a main tank that stores the ink is capable of being mounted, the main tank having a first supply port from which the ink is supplied to the recording head and a second supply port from which the ink is supplied to the buffer tank; a first detecting unit detecting an ink volume in the main tank; and a control unit performing a discharge operation to discharge the ink in the buffer tank from the recording head via the main tank in a pre-transportation process in the ink jet recording apparatus. The control unit prompts a user to replace the main tank without performing the discharge operation if the ink volume detected by the first detecting unit is smaller than a threshold value.

Abstract: A method of cleaning an electrostatic printhead which has one or more ejection tips from which, in use, ink is ejected, the method comprising: stopping a prior flow of ink to a region around the ejection tip(s) for, in use, printing; causing a pressure differential to occur at the tip region thereby causing the ink meniscus to retreat from the tip; and passing a rinse into the tip region to clean the tip.

Abstract: A recording apparatus includes a recording portion; a liquid reservoir portion; a medium ejection route that is provided, at an end portion thereof, with a medium outlet from which the medium is ejected; an ejection roller that ejects the medium from the medium outlet; and a stacking member that stacks the medium. The medium ejection route includes, in an interval where the medium having been subjected to recording by the recording portion is transported to the medium outlet, a reversing curved route along which the medium is curved in a state where a recorded face of the medium faces an inner side of the curve, and the liquid reservoir portion is disposed, in a vertical direction, at a further antigravity direction side position than a position of the medium ejection route and a position of a movement trajectory drawn by the medium during a period until its stack on the stacking member.

Abstract: A liquid discharge apparatus includes: a liquid discharge section configured to discharge liquid supplied from a liquid container in accordance with a drive signal; a sensor configured to measure a remaining quantity of the liquid in the liquid container; a measurement section configured to identify a measurement consumption quantity being a variation quantity of the remaining quantity in a measurement period; an estimation section configured to estimate an estimated consumption quantity of the liquid in accordance with print contents in the measurement period; a comparison section configured to make a comparison between the measurement consumption quantity and the estimated consumption quantity; if the measurement consumption quantity is smaller than the estimated consumption quantity by comparison of the comparison section, an inspection section configured to inspect whether or not there is a discharge defect in the liquid discharge section; and if the inspection section determines that there are no dischar

Abstract: A liquid applying apparatus includes a feeding container; first and second liquid-supply containers for supplying a liquid to the feeding container; a switch for switching a supply source between the first and second liquid-supply containers; a first storage for storing a supply start time of a supply operation; a second storage for storing supply information including a supply source or a supply route; a third storage for storing a liquid level in the feeding container at the supply start time; a fourth storage for storing a supply operation time of the supply operation; a controller that determines a condition of the liquid applying apparatus based on the supply operation time, and determines the supply source or the supply route as an inspection-required spot based on the supply information when the liquid applying apparatus is in a potentially-abnormal condition; and a fifth storage for storing the inspection-required spot.

Abstract: An ink composition is disclosed herein. The ink composition includes from about 5 wt % to about 25 wt % of a co-solvent; from about 0.025 wt % to about 0.2 wt % of i) a chelating agent represented by formula 1, wherein R? is a carboxylic acid functional group or a carboxylate salt functional group and n>2; ii) a chelating agent represented by formula 2:, wherein R is a carboxylic acid functional group or a carboxylate salt functional group, m is greater than or equal to 1, x is greater than or equal to 2, y is greater than or equal to 1, and z is greater than or equal to 2; iii) a chelating agent represented by formula 3, wherein any of r, s, t, or u is a sulfonic acid functional group or a sulfonate functional group; or iv) combinations of any of i, ii, and iii. The ink composition also includes a balance of water.

Abstract: Provided is a liquid injecting apparatus equipped with a liquid injecting head, which is mounted on a carriage and moved reciprocally in a widthwise direction of a target, and a valve unit, which is mounted on the carriage to be supplied with liquid via a supply passage from a liquid retainer and to supply liquid to the liquid injecting head. The valve unit has a pressure chamber connected to the liquid retainer via the supply passage; a valve, which opens or closes the supply passage to supply liquid to the pressure chamber; and a flexible film member, which is displaced based on a negative pressure generated as liquid in the pressure chamber decreases to thereby operate the valve.

Abstract: A connection member is provided that can be fabricated at low cost and easily attached to a target component. The connection member is a member to be connected to and to communicate with a first component. The connection member is further connectable to another connection member to be connected to and to communicate with a second component. The connection member includes a communicating portion connectable to and communicatable with the first component, engaging portions engageable into the other connection member, and engaged portions into which the other connection member is engageable. These connection members are mutually connectable to communicate with each other.

Abstract: A liquid container includes: a container main body which stores a liquid; an ultrasonic sensor which is disposed so as to contact an outer side wall of the container main body and so as to emit an ultrasonic wave into the liquid; and a reflecting means which is disposed at an inner bottom portion of the container main body and reflects the ultrasonic wave emitted into the liquid from the ultrasonic sensor towards a surface of the liquid, the reflecting means being disposed at a position where a distance the ultrasonic wave travels through the liquid in a path of the ultrasonic wave from the ultrasonic sensor to a reflecting surface of the reflecting means, is greater than a distance at which an insensitive band of the ultrasonic sensor is obtained.

Abstract: In a printer including a reflection type optical sensor and a transmission type optical sensor arranged to oppose each other across a paper conveyance path, a sensor spring and a plate spring are elastically deformed consequent to the wave shape of a guide unit and a guide unit, according to the positions of the reflection type optical sensor and the transmission type optical sensor along the width direction of the printer, enabling the reflection type optical sensor and the transmission type optical sensor to be moved based on the pitch of the wave shape along the width direction of the printer while transmitting a click feeling to an operator each time the sensor spring and the plate spring climb over a protruding portion of the wave shape.

Abstract: An inkjet printing system, fluid ejection system and method thereof are disclosed. The fluid ejection system includes a fluid ejection device and a determination module to determine a supply condition based on the count value output by the converter module. The fluid ejection device includes a fluid supply chamber to store fluid, an ejection chamber including a nozzle and a corresponding ejection member to selectively eject the fluid through the nozzle, a pressure sensor unit having a sensor plate to output a voltage value corresponding to a cross-sectional area of an amount of fluid in the ejection chamber. The fluid ejection system also includes a converter module to output a count value corresponding to the voltage value output by the pressure sensor unit.

Abstract: An inkjet printer inkjet printer includes an inkjet head having a nozzle surface, a first tank for storing ink to be supplied to the inkjet head, a second tank for receiving ink that is not consumed by the inkjet head, an ink circulation path, a third tank directly or indirectly connected with a path from the second tank to the first tank on the ink circulation path, and a hermetic sealer for making the first and second tanks in a hermetically-sealed state. In a waiting mode in which ink is not circulated, the first and second tank is made in the hermetically-sealed state by the hermetic sealer and the third tank is made in an atmospherically-released state.

Abstract: An ink container, adapted to supply an ink composition to an ink jet recording apparatus including a recording head for discharging the ink composition, includes an ink chamber containing the ink composition, the ink chamber including a wall defining the ink chamber and a support connected to an inside of the wall to support the wall; and an ink pouring port through which the ink composition is poured into the ink chamber, in which, in a use state of the ink container, in a case where the ink chamber is filled with the ink up to 50% of the volume thereof, an area of the support in contact with the ink composition is larger than an area of the support in contact with atmosphere.

Abstract: An apparatus for inspecting a liquid discharge head including an energy generation element provided on an element substrate and configured to make energy act on a liquid to discharge the liquid from an orifice, a lower protection film having an electrical insulating property and provided on the element substrate while covering the energy generation element, a wiring layer provided between the element substrate and the lower protection film and configured to supply electrical signal for driving to the energy generation element, and a conductive upper protection film provided on the lower protection film is provided. The apparatus comprises a detection circuit configured to detect a potential of the upper protection film when the energy generation element is driven; and a determination circuit configured to determine a driving state of the energy generation element from information about the potential detected by the detection circuit.

Abstract: A liquid supplying apparatus configured to supply a liquid to a liquid ejecting section that is configured to eject the liquid, the liquid supplying apparatus comprising a liquid containing portion configured to contain the liquid, and a fluid communication member in fluid communication with the liquid containing portion and having one end that is exposed to air, the fluid communication member further having a liquid visual recognition portion through which the liquid inside the fluid communication member is visually recognizable.

Abstract: An inkjet recording apparatus includes a tank, a recording head, a cover, a monitor, a cover sensor, an operation panel, and a controller. The cover is movable to cover a plurality of injection inlets associated with a plurality of ink chambers and to expose the plurality of injection inlets. The cover sensor outputs signal depending on position of the cover. The controller controls the monitor to display one of inquiry information and notification on the monitor depending on receipt of the signal from the cover sensor.

Abstract: A non-transitory computer readable medium includes instructions which, when executed by one or more network devices, causes performance of operations. The operations include sending, to shared devices, one or more status queries regarding one or more device conditions for each of the shared devices, obtaining responses to the one or more status queries from each of the plurality of shared devices, the responses including the one or more device conditions for each of the shared devices, filtering the shared devices based on the one or more device conditions to obtain a subset of the shared devices, identifying the subset of the shared devices as a set of available shared devices, and transmitting information identifying the set of available shared devices to a client device.

Abstract: A printer includes a printing section that ejects an ink, and a spectrometer that disperses incident light. The spectrometer includes a window section that transmits the light, an optical filter device, and a light receiving section. The optical filter device includes a variable wavelength interference filter as a dispersing element that disperses light transmitted by the window section. The light receiving section receives the light which is dispersed by the variable wavelength interference filter. A dirtiness of the window section is detected based on measured values corresponding to each of a plurality of wavelengths obtained by spectrally measuring light from a reference object, and reference values corresponding to each of the plurality of wavelengths.

Abstract: An inkjet printing system, fluid ejection system and method thereof are disclosed. The fluid ejection system includes a fluid ejection device and a determination module to determine a supply condition based on the count value output by the converter module. The fluid ejection device includes a fluid supply chamber to store fluid, an ejection chamber including a nozzle and a corresponding ejection member to selectively eject the fluid through the nozzle, a pressure sensor unit having a sensor plate to output a voltage value corresponding to a cross-sectional area of an amount of fluid in the ejection chamber. The fluid ejection system also includes a converter module to output a count value corresponding to the voltage value output by the pressure sensor unit.

Abstract: A liquid supply apparatus includes plural outlet flow paths respectively connected to the plural mounting units in which plural liquid storing bodies are respectively mounted, a supply flow path to which the plural outlet flow paths are connected, a switching unit capable of switching a communication status of each outlet flow path with the supply flow path, and a pressurizing and supplying unit that pressurizes and supplies liquid in the liquid storing bodies to the supply flow path. If the amount of liquid remaining in the liquid storing body communicating with one of the outlet flow paths is less than or equal to a second threshold greater than a first threshold, liquid in the liquid storing body communicating with another outlet flow path different from the one outlet flow path is made ready to be pressurized and supplied.

Abstract: A recording apparatus includes a housing body, an opening/closing member, attached to the housing body via a pivot shaft so as to be capable of rotating freely, that covers the surface of the housing body on one side thereof, and an ink tank having an injection port for filling an ink holding chamber with ink used in recording. Here, the ink tank is disposed so that one end thereof is positioned within the housing body on the opposite side of the housing body as the side in which the pivot shaft is provided, and has a stepped shape including a step portion, the step portion being provided on a side of the ink tank that is further from the pivot shaft. The injection port is provided in the step portion, and when the opening/closing member is opened and the ink is to be filled.

Abstract: A spill proof, user-friendly dispensing system that protects users from exposure to toxic fluids (e.g., Ethylene Glycol used in MICR ink) includes a bottle loading mechanism for feeding ink or other fluids to a respective supply tank of an image forming device, and a quick connect gravity feed multipurpose bottle apparatus. Ink replenishing bottles can be inserted upright into holder of the bottle loading mechanism, connected to a supply tank, and folded back out-of-the-way in a dispensing position. The bottle may be rotated from a gravity feed position to a rotated position for removal and installation while the bottle remains in the holder. The bottle when empty may be used to collect waste from the image forming device.

Abstract: A method of providing web content for a printing device includes attaching a memory module storing the web content to a printing device consumable.

Abstract: Inkjet recording apparatus includes recording head 241 having a plurality of nozzles N, first ink storage section 242, supply passage 301 connecting recording head 241 and section 242, electromagnetic valve 310 that opens or closes section 242, second ink storage section 243, pump P1 that supplies the ink in section 243 to section 242, an electromagnetic valve 312 that opens or closes the second storage ink section 243, recovery passage 302 that connects the recording head 241 and the second storage section 243, and electromagnetic valves 307 and 308 which open or close the recovery passage 302. Control unit 40 allows ink inside the recording head 241 to reflow to the second ink storage section 243 by operating the pump P1 in a state in which the electromagnetic valves 310 and 312 are closed and the electromagnetic valve 308 is opened.

Abstract: Provided is a liquid injecting apparatus equipped with a liquid injecting head, which is mounted on a carriage and moved reciprocally in a widthwise direction of a target, and a valve unit, which is mounted on the carriage to be supplied with liquid via a supply passage from a liquid retainer and to supply liquid to the liquid injecting head. The valve unit has a pressure chamber connected to the liquid retainer via the supply passage; a valve, which opens or closes the supply passage to supply liquid to the pressure chamber; and a flexible film member, which is displaced based on a negative pressure generated as liquid in the pressure chamber decreases to thereby operate the valve.

Abstract: A recording apparatus includes an opening section 30 which is formed on an outside surface of a housing 25 and through which a sheet cassette 29 is inserted, ink containers 17a and 17b that store ink, cases 18 that are disposed on outside surfaces on both sides adjacent to an outside surface on which the opening section 30 of the housing 25 is formed and holds the ink containers 17a and 17b, and a tube that supplies the ink from ink containers 17a and 17b to the inside of the housing 25, in which sizes of the cases 18 on both sides are different from each other.

Abstract: An inkjet ink which is electron beam curable includes 10 to 40 wt.-% of at least one oligomer based on a total weight of the inkjet ink, 5 to 25 wt.-% of at least one reactive thinner based on the total weight of the inkjet ink, 25 to 84 wt.-% of a solvent mixture comprising at least two solvents based on the total weight of the inkjet ink, and 1 to 15 wt.-% of at least one pigment based on the total weight of the inkjet ink. The at least two solvents have a boiling point of from 50 to 300° C., a dielectricity constant of from 5 to 20, and an evaporation rate of 3 to 5000. The evaporation rate of the at least two solvents differs by a factor of from 2 to 10. The inkjet ink is free from photoinitiators.

Abstract: A liquid storage container includes the first electrode, the second electrode which penetrate from an outside to an inside of a storage portion and extend in a direction intersecting a vertical direction, and a support portion which is provided in the storage portion and supports the first electrode. In the vertical direction, a height of the second electrode is equal to a height of the first electrode or is lower than the height of the first electrode. The support portion includes a support wall which supports the first electrode and a side wall intersects the support wall and is wide from the support wall in the vertically downward direction. The support wall is capable of being protruded to the second electrode side further than a meniscus formed in the ink between the first electrode and the support wall in the second electrode of the first electrode.

Abstract: In an embodiment, a fluid level sensor includes a sensor plate and a current source. The fluid level sensor also includes an algorithm to bias the current source such that current applied to the sensor plate induces a maximum difference in response voltage between a dry sensor plate condition and a wet sensor plate condition.

Abstract: A printer includes: a liquid ejecting head which performs recording on a paper sheet by ejecting liquid; a housing in which the liquid ejecting head is stored; an operating panel which is provide in the housing; a liquid storing body which stores the liquid supplied to the liquid ejecting head; and a case which accommodates the liquid storing body. When a direction in which a sign on the operating panel faces is considered as a front surface of the printer and the housing, the case is mounted on a right side surface of the housing, and the case is mounted on the housing in a state of being inclined with respect to a depth direction of the printer.

Abstract: A 3D extrusion print process for producing multicolored three-dimensional objects is provided. The process produces mechanically stable, multicolored 3D objects with good color definition. The process according to the invention is based on coating, upstream of the printing head, of the polymer strand used for producing the actual object, and on fixing of the coating upstream of entry of the polymer strand into the printing head. Downstream of the extrusion process in the printing head, the coating remains predominantly at the surface of the extruded strand.

Abstract: An inkjet printer includes: an inkjet head including a nozzle configured to eject ink; a positive pressure tank configured to store the ink to be supplied to the inkjet head; a negative pressure tank configured to receive the ink not consumed by the inkjet head; an ink deliverer configured to deliver the ink from the negative pressure tank to the positive pressure tank; a pressure regulator configured to regulate pressures of the positive pressure tank and the negative pressure tank; and a controller configured to control the ink deliverer and the pressure regulator such that an ink delivery operation by the ink deliverer and a pressure regulation operation by the pressure regulator are performed separately in time.

Abstract: An image forming apparatus includes a recording head, a head tank, a main tank, and a controller. The recording head includes nozzles to discharge liquid droplets. The head tank includes a liquid containing part to contain liquid supplied to the recording head. The main tank contains the liquid supplied to the head tank. The controller controls, after detection of an end state of the main tank, post-end printing using the liquid remaining in the head tank corresponding to the main tank in the end state. The controller permits the post-end printing when an amount of the liquid remaining in the head tank to which the liquid is supplied from the main tank in the end state is a predetermined threshold remaining amount or greater.

Abstract: A liquid ejecting apparatus comprises: a liquid ejecting section that ejects liquid; a supply path through which the liquid is supplied from a liquid supply source to the liquid ejecting section; a movement mechanism that causes the liquid ejecting section to move; and a static mixer that is provided on the supply path and gives rise to a change in a flow of the liquid through the supply path; wherein the movement mechanism causes the liquid ejecting section to move before ejection of the liquid onto a medium by the liquid ejecting section, and the supply path located between the liquid ejecting section and the static mixer moves due to the movement.

Abstract: A fluid discharge device, a printing device, and a control method for a fluid discharge device enable accurately detecting an empty fluid state and suppressing fluid waste. An inkjet printer 1 has an ink cartridge in which ink is stored, a subtank that draws ink from the ink cartridge, an inkjet head to which ink is supplied from the subtank, a movable carriage on which the inkjet head and subtank are mounted, an ink pump unit that draws the ink supplied to the inkjet head from the ink cartridge by movement of the carriage, and a control unit that determines if ink is in the ink cartridge based on the load required to move the carriage.

Abstract: A liquid ejection device provided by the invention can be easily transported in a stable orientation in which the weight balance is kept. A printer of the invention includes a liquid ejection head for ejecting ink onto a sheet, ink tanks for storing ink to be supplied to the liquid ejection head, and tubes that connect the ink tanks to the liquid ejection head. An ink injection opening that enables the injection of ink is formed on the upper side of the ink tanks in the vertical direction, and one portion of the ink tanks and another portion of the ink tanks are respectively arranged on one side and another side that face each other across a sheet conveying region.

Abstract: A liquid cartridge includes a movable member and the movable member includes a detection portion and an anchor. The liquid cartridge also includes a restriction member and the restriction member includes an operation portion and a restriction portion. When the operation portion is in a first position, the restriction portion is configured to contact the movable member such that the movement of the anchor is restricted within a restricted range. When the operation portion is in a second position, the restriction portion is configured to release the movable member such that the anchor is positioned in a free range which is below the restricted range.

Abstract: Upon supply of inks to second tanks of a plurality of printing units with the second tanks in communication with each other via a negative-pressure common air chamber in an air-tight state and with a negative-pressure force applied to the second tanks and the negative-pressure common air chamber, a controller is configured to drive ink supply units of the plurality of printing units to supply the inks such that times in which the inks flow into the second tanks in the plurality of printing units do not coincide with each other.

Abstract: A printing fluid cartridge includes a front face oriented toward a first direction, a printing fluid supply portion positioned at front face, a rear face positioned opposite the front face and oriented toward a second direction opposite the first direction, at least one electrical interface positioned between the front face and the rear face, and an engagement surface facing in the second direction. The at least one electrical interface is offset from the printing supply portion with respect to a third direction perpendicular to the first direction and the second direction. The at least one electrical interface is positioned closer to front face than the engagement surface is, and the at least one electrical interface and the engagement surface intersect a plane which is parallel with the first direction, the second direction, and the third direction.

Abstract: A liquid discharge head includes a liquid storage chamber capable of holding a liquid, a liquid communication pipe communicating with the liquid storage chamber and being configured to supply the liquid from a liquid tank to the liquid storage chamber by installing the liquid tank to the pipe to communicate with the liquid tank, a discharge port communicating with the liquid storage chamber to discharge the liquid, an electrode pair each having an outside end portion located outside the liquid storage chamber and detecting a liquid level of the liquid storage chamber, and an electric contact portion connected to the outside end portion of each of the electrode pair. The electric contact portion is located above the liquid communication pipe with a discharge port surface on which the discharge port opens taking a position facing perpendicularly downward.

Abstract: The present invention provides a method for controlling light emission of an ink cartridge, a control unit, a circuit board, an ink cartridge and an imaging device, to decrease misjudgment rate of the imaging device. The control method includes: receiving and identifying a light emitting control instruction from the imaging device main body; starting a light-on delay timing when identifying the light emitting control instruction is a light-on instruction; controlling the light emitting unit of the ink cartridge to stop emitting light when identifying the light emitting control instruction is a light-off instruction; controlling the light emitting unit to emit light when detecting a timing value of the light-on delay timing reaches a delay threshold value. The present invention avoids misjudgment problem of unable to pass position detection due to light amount inconsistent caused by manufacturing errors of the light emitting unit, when setting a light-on delay timing.

Abstract: In a liquid cartridge, a liquid storing section defines a liquid storing chamber storing liquid, and a channel section defines a channel in fluid communication with the liquid storing chamber. A field forming section forms a field that changes depending on a position of a movable member that is movable in the channel. A power-source potential is inputted to a power-source terminal, and a ground potential is inputted to a ground terminal. A sensor is electrically connected with the power-source terminal and the ground terminal, and generates a potential based on the position of the movable member by being disposed in the field formed by the field forming section. An output terminal outputs the potential generated by the sensor. The sensor generates the potential higher than a ground potential regardless of the position of the movable member.