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.

Abstract: There is provided a liquid ejection device including a head for ejecting a liquid, a liquid containing unit, a liquid filler, and a pressure adjusting unit, in which the liquid containing unit includes a sealed housing and a flexible member provided in the housing, the housing includes a first containing space communicating with the head and a second containing space partitioned from the first containing space through use of the flexible member, the first containing space contains the liquid, and the liquid filler is filled into the second containing space, the pressure adjusting unit communicates with the second containing space, and adjusts the pressure of the liquid filler filled into the second containing space so as to maintain a negative pressure with respect to the head.

Abstract: One example discloses a system comprising a computer comprising a memory to store machine readable instructions. The system can also comprise a processing unit to execute the machine readable instructions, the machine readable instructions comprising a data collector. The data collector can receive a plurality of verification records from a printer. Each verification record can characterize a usage of a given replaceable supply at the printer. The data collector can also evaluate a verification history of the printer based on the plurality of verification records to determine a usage credit for the printer. The usage credit can correspond to a number of authentic replaceable supplies consumed at the printer.

Abstract: A liquid ejection head includes an ejection port for ejecting liquid, a liquid chamber communicating with the ejection port, and a substrate having a heat generating resistor arranged in the liquid chamber at a position corresponding to the ejection port and a bubble detecting device arranged on the heat generating resistor for controlling driving of the heat generating resistor by detecting a bubble produced by the heat generated by the heat generating resistor. The bubble detecting device has two electrodes arranged in the liquid chamber and, as viewed in the direction perpendicular to the substrate, one of the two electrodes is arranged at a position overlapping the heat generating resistor whereas the other one of the two electrodes is arranged at a position not overlapping the heat generating resistor.

Abstract: An inkjet printing device allows separation of ink solvent liquefied in an exhaust passage from exhaust gas, and prevents the separated exhaust gas from contaminating the inside of the print head. When ink fed from a container is jetted from a printing nozzle, ink that has not been used for the printing is drawn by a gutter along with air and collected in the container. Air mixed with the ink solvent and collected is discharged as exhaust gas into an exhaust passage from the container. The ink solvent that has been liquefied in the exhaust passage is separated from the gas by retaining the liquid using capillary action in a gas-liquid separator, and the separated liquefied ink solvent is collected. The trace amount of the ink solvent leaking on the exhaust side of the gas-liquid separator is prevented from dripping into the print head by a drip prevention unit.

Abstract: The present invention relates to an ink cartridge for an inkjet printer, which comprises: an ink reservoir for storing ink, an ink outlet for supplying ink to the printer, and an installation detection component which is coordinated with the printer to detect whether the ink cartridge is successfully installed. The installation detection component includes a controller, a connecting circuit and a light-emitting portion connected with the controller through the connecting circuit. The controller is configured to control the light-emitting portion to emit light which will be received by sensors of the printer to determine whether the installation is successful, and controls the light-emitting portion automatically. The ink cartridge for the inkjet printer provided by the present invention solves the technical problem that the installation of the traditional ink cartridge must undergo strict actual inspection of a printer installation program.

Abstract: An image forming apparatus is provided, including an image forming mechanism which executes a printing process; an object data memory which stores image data as an object of the printing process when a printing instruction is received; a re-formation condition memory which stores a type of a printing function and whether or not image data is an object of image re-formation in correlation with each other; an object judging mechanism which judges whether or not the image data as a source of the image formation is the object of the image re-formation; and a data deleting mechanism which deletes the image data as the source of the image formation from the object data memory if the image data as the source of the image formation is not the object of the image re-formation.

Abstract: A liquid ejecting method of a liquid ejecting apparatus that ejects a liquid onto a target on the basis of acquired conditions, includes acquiring a residual amount of liquid that is useable, estimating a use amount of liquid that is used in ejection of liquid using a set use amount of liquid per single target quantity that is set in advance with respect to a size of a target that is included in the acquired conditions, and performing a warning that is related to the residual amount of liquid before ejecting the liquid onto the target that is used in a case in which the residual amount of liquid after liquid ejection, which is estimated on the basis of the residual amount of liquid and the use amount of liquid, is smaller than a threshold value.

Abstract: There is provided a liquid storage container capable of efficiently using a liquid stored therein. An ink cartridge has a flexible member having flexibility attached to a wall surface inside a housing to define a space inside the housing. In a position during use, an angle between the wall surface inside the housing and the flexible member in a lower attachment position of the flexible member to the housing is greater than an angle between the wall surface inside the housing and the flexible member in an upper attachment position.

Abstract: An image forming apparatus includes an apparatus body, a recording head, head tanks, a carriage, main tanks, a liquid feeder, a liquid feed controller, a displacement member, a carriage-side sensor, and a body-side sensor. The liquid feed controller controls the carriage-side sensor to detect the displacement member of each head tank during a single scan of the carriage; obtains a current position of the displacement member; determines a liquid amount in each head tank or adjustment operation of the liquid amount based on both a comparison result of the current position and a determination position and a detection result of the carriage-side sensor, the determination position calculated from a detection position of the displacement member detected with the carriage-side sensor and set within a range in which the carriage-side sensor detects the displacement member; controls the feeder in accordance with a determination result; and adjusts the liquid amount.

Abstract: A first ink tank, and a second ink tank including a first chamber having an ink inlet port and a second chamber having a sensing unit are provided. The ink inlet port is provided at a position so that a volume of the second ink tank above a second height does not become smaller than an amount of ink volume change in the second chamber when the ink volume is changed from a first height which is a height of the ink surface when a minimum volume of ink is in the second ink tank under normal usage to a second height which is a height of the ink inlet port.

Abstract: An ink jet method includes feeding an ultraviolet curing type ink jet composition from a composition storing body which stores an ultraviolet curing type ink jet composition, which contains a polymerizable compound and a hindered amine compound as a polymerization inhibitor, with a storing volume of the composition of 2.5 L to 20 L to an ink jet head through a channel, deaerating the ultraviolet curing type ink jet composition in the channel, and discharging the ultraviolet curing type ink jet composition from the ink jet head, in which an amount of a dissolved gas of the ultraviolet curing type ink jet composition after the deaeration is 30 ppm or less and an amount of a dissolved gas of the ultraviolet curing type ink jet composition stored in the composition storing body is 10 ppm or more.

Abstract: Provided is a liquid ejecting apparatus which includes a carriage which reciprocates in a state where a liquid ejecting head is mounted thereon, a tank unit which is provided outside the carriage and accommodates ink, four liquid supply tubes which communicate with the liquid ejecting head and the tank unit, and a tube support portion which supports the liquid supply tubes in a state where the liquid supply tubes are aligned in a horizontal direction, in which, in a case main body, the liquid supply tubes extend further to the tank unit side than a portion in which the liquid supply tubes are supported by the tube support portion, in a state where a parallel alignment direction of the four liquid supply tubes changes from the horizontal direction (a transporting direction) to a vertical direction.

Abstract: Provided is an image forming system including a case that accommodates an ink accommodating body which accommodates ink, a connection tube through which ink within the ink accommodating body can be supplied, and an image forming apparatus that has an ink jet printer that can eject the ink supplied through the connection tube and a reading apparatus which a reading surface on which an original copy G that is arranged on the ink jet printer is read. Then, the case is arranged beside the image forming apparatus in such a manner that an upper surface of the case is matched with the reading surface in terms of height.

Abstract: Provided is a self-sealing unit which has two films in a facing state, two end surfaces intersecting with the films, and a plurality of self-sealing valves. The self-sealing valves have diaphragm chambers which are formed by the films and valve bodies which move in accordance with displacement of the films and open/close flow paths. When viewed from a direction perpendicular to a plane to which the self-sealing unit is fixed, the length of a diagonal line connecting intersection points on sides of the diaphragm chambers is set to be longer than that of a diagonal line connecting intersection points on sides of the valve bodies.

Abstract: A fluid ejection device includes a fluid storing unit and a fluid outlet. A fluid pressing unit presses the fluid storing unit and causes fluid to flow from the fluid outlet. A connection pipe has an end that is connected to the fluid outlet. A fluid ejection unit ejects the fluid, which is received from a fluid intake port to which the other end of the connection pipe is connected, in a pulse-like manner according to a drive signal generated by a fluid-ejecting control unit. An ejecting-instruction input unit receives a fluid ejecting instruction. If the pressure in the fluid storing unit is equal to or higher than an upper limit value in a range determined with reference to a target pressure value, the drive signal is not generated. When the pressure in the fluid storing unit is lower than the upper limit value, the drive signal is generated.

Abstract: An embodiment of this invention is directed to discriminating between an ink present state and a bubble state and accurately determining the presence/absence of ink in residual ink detection. A printing apparatus measures the voltage between two electrodes in an ink tank based on an electric current supplied to one of the two electrodes, and compares the measured voltage with a first threshold voltage. When the measured voltage is lower than the first threshold voltage, the measured voltage is compared with a second threshold voltage lower than the first threshold voltage. According to results of these two comparisons, control is performed to supply the electric current, re-measure the voltage between the two electrodes, and re-inspect a residual ink amount. In a case where accurate determination is suspected, the presence/absence of ink is determined by re-inspection.

Abstract: A continuous ink jet printer including an ink tank for holding ink, an ink nozzle in fluid communication with the ink tank for ejecting ink droplets, and a gutter for receiving, through an ink-receiving inlet thereof, ink droplets which are not used for printing. A gutter flow path starts at the ink-receiving inlet for ink that has entered the gutter through the ink-receiving inlet, and provides fluid communication to the ink tank. A return line is in fluid communication with the print head for conveying air to enter the gutter flow path. A makeup tank is in vapor communication with the ink tank to allow air to be conveyed from the ink tank to the makeup tank. A condenser is in fluid communication with the makeup tank and the return line for condensing solvent.

Abstract: The invention is directed to a method for performing failure analysis on an imaging device that includes retrieving an encrypted error log containing one or more error conditions that occurred on the imaging device, decrypting the retrieved encrypted error log, determining if the retrieved encrypted error log has been altered based on the decrypted error log, and upon determining that the retrieved encrypted error log has not been altered, performing failure analysis on the imaging device using the decrypted error log.

Abstract: An ink cartridge is adapted to be mounted in a holder of a printer, and includes first to third surfaces and a pressing section. The first and second surfaces face each other. The third surface has first and second end sections respectively adjacent to the first and second surfaces. The pressing section presses the ink cartridge to a second surface side when the ink cartridge is mounted in the holder. The third surface has a detection section which optically detects a remaining state of ink in the ink cartridge, and an abutting section which abuts against the holder. A distance between the detection section and the second end section is shorter than a distance between the detection section and the first end section in the third surface, and the abutting section is positioned between the detection section and the second end section.

Abstract: A liquid consuming apparatus 200 includes a photosensor 80 capable of facing a prism 320 provided in a liquid container, and a control unit 100. The control unit 100 performs remaining status determination processing for determining remaining status of liquid in the liquid container, based on a detection signal detected by the photosensor 80 due to reflection from the prism 320 when light is emitted by the photosensor 80, performs ambient light determining processing for determining whether or not the remaining status determination processing is affected by ambient light, based on the detection signal detected by the photosensor 80 when light is not emitted by the photosensor 80, and continues printing until the end of printing on a sheet that is being printed, even if the control unit 100 determines that the influence of ambient light is present, by the ambient light determination processing during execution of printing.

Abstract: An ink cartridge for supplying the ink in an ink reserving chamber via an ink supply port into a recording head has a differential pressure valve mechanism disposed between an ink flow port and the ink supply port in the ink reserving chamber, whereby the ink is supplied an adequate amount to the recording head by opening or closing the differential pressure valve mechanism in accordance with an ink pressure of the recording head. As a result, it is possible to supply the ink at a substantially constant pressure to the recording head without regard to the variation in the amount of ink or the-movement of the carriage.

Abstract: A cartridge accommodating apparatus includes: a cartridge accommodating section accommodating a cartridge which includes a liquid accommodating section, a liquid lead-out channel, a first blocking member blocking a first portion of the liquid lead-out channel, and a second blocking member blocking a second portion between the first portion and the liquid accommodating section; a hollow tube introducing liquid in the liquid lead-out channel into inside of the hollow tube; a moving mechanism moving the hollow tube between a first position at which a tip portion of the hollow tube is located outside the liquid lead-out channel and a second position at which the tip portion of the hollow tube has entered inside the liquid lead-out channel; a driving source; a driving force transmitting mechanism transmitting driving force of the driving source to the moving mechanism; and a driving source controller controlling driving speed of the driving source.

Abstract: A liquid ejecting apparatus includes a carriage that reciprocates and includes a recording head that ejects liquid and a liquid container that supplies the liquid to the recording head and an optical sensor that includes a light emitting section capable of emitting light toward the carriage and a light receiving section that receives reflected light that is light that has been emitted from the light emitting section and has been reflected by the liquid container. The carriage is provided with a projecting section capable of suppressing incidence of ambient light to the light receiving section of the optical sensor.

Abstract: Example circuits and methods are described involving a flexible substrate for a fluid cartridge, comprising an integrated circuit connected to the flexible substrate, and electrical connector pads arranged on the flexible substrate for connection to the integrated circuit.

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.

Abstract: An inkjet recording apparatus includes a recording head including a discharge port, a carriage configured to perform reciprocating scanning with the recording head mounted thereon, a main tank configured to store ink, a sub-tank configured to be supplied with ink from the main tank via a tube, a supply tube configured to connect the recording head and the sub-tank, and a control unit configured to control the carriage, wherein the control unit controls acceleration of the carriage such that a dynamic pressure of ink inside the supply tube becomes greater than a pressure resistance to an ink movement and a pressure resistance to an air movement in the tube.

Abstract: A consumable supply item for an imaging device holds an initial or refillable volume of ink. A housing defines an interior having a pair of opposed electrodes. The electrodes have a capacitance that varies in response to an amount of liquid between them. A controller energizes one electrode and receives an output reading from the other. The controller processes the reading on board the housing and supplies it as a digital data stream to the imaging device during use. A memory stores calibration values for an empty and full housing. The controller writes back to the memory present fluid levels obtained from the output reading of the electrode. An enable output allows operation or not of a fluid pump in the imaging device. Materials, construction, modularity, and fluid communication ports are further embodiments, to name a few.

Abstract: An ink jet recording apparatus includes: a container to store ink; a detector to detect a remaining ink amount; a liquid feeding unit to supply the ink to the container; an energy generation unit to cause the ink to be discharged; a storage unit to store correspondence information in which driving information for driving the energy generation unit is associated with each piece of time information indicating a supply time taken to supply the ink; and a setting unit to set new driving information using the correspondence information when an actual supply time is different from the supply time indicated by the time information associated with current driving information among the pieces of time information. The actual supply time indicates a time period from when the liquid feeding unit starts supplying the ink until the detector detects that the remaining ink amount is equal to or higher than a threshold.

Abstract: A method for recycling ink in an inkjet printer includes combining purged inks having two or more colors with black ink to form a mixed ink. The printer identifies an optical characteristic of the mixed ink and compares it to the optical characteristic for black ink. A controller for the printer adjusts the operation of the printer to form ink images having an optical characteristic that is closer to black ink than ink images formed with the mixed ink alone.

Abstract: An ink containing device includes an ink cartridge and an adaptor. The ink cartridge comprises a first main body comprising a chamber configured to store ink, and an ink outlet portion disposed on a first surface of the first main body configured to direct the ink from the chamber to an exterior of the first main body, and an ink detecting portion configured to detect an amount of the ink stored in the ink chamber. The adaptor is configured to attach to the ink cartridge. The adaptor comprises a second main body comprising a second surface, and an electrical interface disposed on the second surface.

Abstract: An object is to provide a technology capable of decreasing the possibility that bubbles may reach a first member. A method of manufacturing a liquid container includes (a) a process of preparing a liquid container, (b) a process of storing liquid in a first storage chamber by injecting the liquid from the downstream side of the first storage chamber based on a flow direction of a fluid from an atmosphere opening port to a supply port.

Abstract: A liquid supply device includes diaphragms, pressing members, a movement unit, a rotating shaft, and cams. In the liquid supply device, when the rotating shaft is rotated in a first direction, the cams are moved to arrange adjoining ones of the cams to have a phase difference around the rotating shaft, in which one of the cams selectively causes a corresponding one of the pressing members to regulate an increase in a volume of a corresponding one of the diaphragms. When the rotating shaft is rotated in a second direction, the cams are moved to arrange the cams in phase with one another when viewed from an axial direction of the rotating shaft, in which the cams simultaneously cause all the pressing members to regulate the increase in the volume of each of the diaphragms.

Abstract: A printing apparatus includes a liquid receptacle, a head, a driving unit for the head, a detection unit that detects a remaining state of a liquid, and a control unit that controls the driving unit and, in the case where the liquid receptacle and the detection unit are in a predetermined positional relationship, determines whether or not there is liquid remaining in the liquid receptacle based on a detection signal from the detection unit. In the case where the control unit has determined that greater than or equal to a specified value of the liquid in the liquid receptacle has been consumed without the liquid receptacle and the detection unit arriving at the predetermined positional relationship, the control unit performs forced detection control that sets the liquid receptacle and the detection unit to the predetermined positional relationship and causes the detection unit to detect the remaining state of the liquid.

Abstract: An apparatus for printing containers in several colors on an outer container surface with an imprint formed by a print image includes printing head units, a pair of transport systems for moving the head units along a first direction on a closed path, container receptacles, a second transport system moving the receptacles between a feed and a discharge. The transport systems form a printing section between the feed and discharge. One of the transport systems causes controlled and independent motion of the printing head units or receptacles along a motion path thereof.

Abstract: A printing apparatus includes first to n-th (n is an integer equal to or greater than 2) ink tanks in which ink accommodated in an ink pack is filled, first to n-th slots that correspond to the ink tanks, first to n-th memory units that are packaged together with the ink pack and are respectively installed in the slots, and a processing unit. The processing unit outputs a read-out command in which communication ID information is set, to the storage device included in the memory unit that is installed in the selected slot, determines whether ink color information that is read out and an ink color corresponding to the slot are consistent with each other, and determines that the memory unit is erroneously installed when the read-out ink color information and the ink color corresponding to the slot are inconsistent with each other.

Abstract: A recording apparatus includes: a plurality of first ribs provided at predetermined intervals in a direction intersecting with a direction along which a recording target medium is transported; a plurality of second ribs provided at predetermined intervals in the direction intersecting with the direction along which the recording target medium is transported, the plurality of second ribs being provided downstream of the plurality of first ribs for guiding the recording target medium to a downstream side, the plurality of second ribs being provided at an area where the plurality of second ribs can face the recording head; a first member that is made of a resin material that is used as a material of the plurality of first ribs; and a second member that is made of a metal material that is used as a material of the plurality of second ribs.

Abstract: In an arrangement to supply ink to a print head unit having a print head, an input, and an output, a back-pressure tank having ink is provided and connected with the input of the print head unit. A degassing unit for ink and having an input and an output is also provided. A first selector valve is connected to the degassing unit input, the first selector valve in a first position establishing a connection of the degassing unit with the output of the print head unit. A second selector valve is connected to the degassing unit output, the second selector valve in a first position establishing a connection of the degassing unit with the back-pressure tank.

Abstract: An ink cartridge comprises a main body comprising a first surface, a second surface, and a chamber, configured to store ink, disposed between the first surface and the second surface; an ink outlet portion disposed on the first surface of the main body configured to direct the ink from the chamber to an exterior of the main body; and an electronic circuit board disposed on the main body. The electronic circuit board comprises an electrical interface, a first portion facing a second direction that intersects a first plane that is perpendicular to the first direction, a second portion facing a third direction away from the ink outlet portion that intersects a second plane that is parallel to the first direction, and a connecting portion between the first portion and the second portion. The electrical interface is disposed on an area of the electronic circuit board including the connecting portion.

Abstract: Among other things, an apparatus for use in fluid jetting is described. The apparatus includes a printhead including a flow path and a nozzle in communication with the flow path that has a first end and a second end. The apparatus also includes a first container fluidically coupled to the first end of the flow path, a second container fluidically coupled to the second end of the flow path, and a controller. The first container has a first controllable internal pressure and the second container has a second controllable internal pressure. The controller controls the first internal pressure and the second internal pressure to have a fluid flow between the first container and the second container through the flow path in the printhead according to a first mode and a second mode.

Abstract: There is provided a recording apparatus including a recording head that can eject an ink onto a sheet, a transport unit that transports the sheet to the recording head, a housing that contains the recording head and the transport unit, a case that is arranged on an outer surface of the housing so that the bottom portion thereof is positioned higher than a bottom surface of the housing, and that serves as a holder which holds an ink container containing an ink, and a supply unit that supplies the ink from the ink container to the recording head.

Abstract: Disclosed herein are apparatus and method for transferring, focusing and purging powder for direct printing at low temperature. A filter is provided between an operation chamber housing in which a work target is disposed and a reservoir tank which contains powder to adjust the amount of particles transferred from the reservoir tank into the operation chamber housing. A pressure unit connected to the reservoir tank generates air pressure for applying powder to the work target. A purging unit connected to the reservoir tank generates pressure for returning powder that has remained in the operation chamber housing, the filter, etc. to the reservoir tank after work has been completed. The apparatus is configured such that a series of process of transferring powder to be applied to the surface of the work target and returning remnant powder to the reservoir tank can be rapidly and smoothly conducted.

Abstract: A storage device includes an interface unit, a storage unit, a detection unit and a control unit. When the detection unit detects a preset trigger condition and the total surplus of the recording material is greater than the capacity of the recording material, the control unit effects the updating of the total surplus of the recording material stored in the storage unit and the erasing of the surplus of the erasable recording material or the consumption amount of the erasable recording material as a calculation value. When the total surplus of the recording material is less than or equal to the capacity of the recording material, the control unit will not actively update the total surplus of the recording material or the consumption amount of the recording material in the storage unit. Provided is a consumption container, which can better manage the data in the storage device.

Abstract: A continuous ink jet printer including an ink tank for holding ink, an ink nozzle in fluid communication with the ink tank for ejecting ink droplets, and a gutter for receiving, through an ink-receiving inlet thereof, ink droplets which are not used for printing. A gutter flow path starts at the ink-receiving inlet for ink that has entered the gutter through the ink-receiving inlet, and provides fluid communication to the ink tank. A return line is in fluid communication with the gutter for conveying air to enter the gutter flow path. A makeup tank is in vapor communication with the ink tank to allow air to be conveyed from the ink tank to the makeup tank. A condenser is in fluid communication with the makeup reservoir and the return line for condensing solvent.

Abstract: An inkjet printing device including a head unit that includes an inkjet head, a fixed tank for storing ink to be supplied to the inkjet head, and a tank attachment section to which ink tank for storing ink to be replenished to the fixed tank is exchangeably attached. When ink tanks are exchanged, an ink tank attached to the tank attachment section of head unit is removed by an arm section of the tank exchange mechanism, and an ink tank to be used for exchange removed from tank storage unit is attached to the tank attachment section of the head unit.

Abstract: An inkjet recording apparatus includes a recording head, a carriage with the recording head mounted thereon, a main tank, a sub-tank configured to be supplied with ink from the main tank via a tube, a supply tube configured to connect the recording head and the sub-tank, a supply unit connected to the supply tube and configured to supply ink from the main tank to the sub-tank, and a control unit configured to control acceleration of the carriage and to control the supply unit, wherein, when an empty volume in the sub-tank is greater than or equal to an ink volume in the main tank, the supply unit is controlled to supply ink to the sub-tank.

Abstract: A liquid ejection apparatus including: a liquid ejection head and ejection openings; a tank; an air communication device; a supply channel; a return channel; a supply device; an adjusting device; and a controller, wherein the controller performs a liquid circulation control by controlling: the adjusting device such that a channel resistance value of the return channel is less than a predetermined maximum value; and the supply device to supply the liquid into the inside channel, wherein, when the liquid is circulated by the liquid circulation control, the controller starts a liquid discharge control for discharging the liquid by making the channel resistance value larger than that in the liquid circulation control, and wherein the controller controls the air communication device such that an inside of the tank is interrupted from the ambient air in at least a part of a period of the liquid circulation control.

Abstract: The present invention provides an ink jet printing apparatus and an ink jet printing method in which if an image is printed using ink and a process liquid serving to improve the printability of the ink, degradation of print image quality can be suppressed which results from a rise in the temperature of a print head. To achieve this, the present invention reduces the amount of process liquid ejected from a process liquid ejection section capable of ejecting a process liquid, with increasing temperature of an ink ejection section capable of ejecting ink.

Abstract: An ink-jet recording apparatus performing recording on a recording medium includes: a water-based yellow ink containing a yellow dye, a water-based magenta ink containing a magenta dye and a water-based cyan ink containing a cyan dye of which hue angles ?H° defined in a CIELAB color space are within the predetermined ranges; an ink-jet head configured to discharge the water-based yellow, magenta and cyan inks; and a controller configured to control the ink-jet head so as to satisfy the following conditions (A) and (B) to thereby form a composite black on the recording medium: (A) 0.66?C/(Y+M) and (B) 530?Y+M+C?600, wherein in the conditions (A) and (B): Y, M and C are drop amounts (ng) of the yellow dye, the magenta dye and the cyan dye dropped in a 25.4 mm×25.4 mm area of the recording medium, respectively.

Abstract: A method and apparatus for re-circulating a carrier in a printer is disclosed. The re-circulating system comprises a controller, a print head, a variable speed fan coupled to an air passageway and a condenser. The controller determines a liquid amount of carrier to be place on a page during a print operation. The controller adjusts the variable speed fan dependent on the amount of liquid carrier determined to be placed onto the page.