Liquid ejection device and liquid reservoir

Abstract

The present application provides a liquid ejecting apparatus and a liquid reservoir. The liquid ejecting apparatus includes a head having a nozzle configured to eject a liquid, a container connected to the head and configured to store the liquid, a communication portion configured to communicate an internal space of the container with the atmosphere, and a liquid reservoir configured to store the liquid and detachably attached to the container. In an attached state where the liquid reservoir is attached to the container, an internal space of the liquid reservoir communicates with the internal space of the container through a liquid flow path and a gas flow path.

Description

Technical Field

[0001] This disclosure relates to: a liquid reservoir for storing liquid; and a liquid ejection device having a head for ejecting liquid stored in the liquid reservoir. Background Technology

[0002] To maintain the desired ink ejection state, the inkjet printer needs to maintain a meniscus formed at each nozzle of its head. As a method for maintaining this meniscus, a method of incorporating a back pressure control mechanism into the ink storage cartridge is known.

[0003] Additionally, an inkjet pen is known that is configured to record images by ejecting ink stored in a secondary cartridge from a nozzle. In this inkjet pen, the liquid surface level of the ink stored in the cartridge is higher than the opening of the nozzle (see, for example, Japanese Provisional Patent Publication No. S55-065560).

[0004] In known inkjet pens, the ink cartridge is equipped with, for example, a foam core or a differential pressure valve as a back pressure control mechanism. However, if a foam core is placed in the cartridge, it may cause problems, such as a reduced volumetric capacity of ink that can be stored in the cartridge, and foam residue when the cartridge is discarded. Additionally, if a differential pressure valve is placed in the cartridge, it may cause problems, such as an increased size of the ink supply system including the cartridge. Moreover, if ink is supplied from the cartridge to the head without intermediate storage, air bubbles may enter the head after the ink stored in the cartridge is depleted. These problems may also occur in printers configured to store ink in a can that is detachably attached to a secondary canister. Summary of the Invention

[0005] The present disclosure provides one or more improved techniques that enable: miniaturization of the liquid supply system including the liquid reservoir while increasing the volumetric capacity of the liquid that can be stored in the liquid reservoir (e.g., a box); and restriction of air bubbles from entering the head after the liquid stored in the liquid reservoir has been used up.

[0006] According to an aspect of this disclosure, a liquid ejection device is provided, the liquid ejection device including a head having a nozzle configured to eject liquid. The liquid ejection device further includes a container connected to the head and configured to store the liquid. The liquid ejection device further includes a communication portion configured to communicate an internal space of the container with the atmosphere. The liquid ejection device further includes a liquid reservoir configured to store the liquid and configured to be detachably attached to the container. In an attached state, the internal space of the liquid reservoir communicates with the internal space of the container via a liquid flow path and a gas flow path.

[0007] In the liquid ejection device constructed as described above, when the liquid reservoir is attached to the container, the liquid stored in the liquid reservoir is transferred to the container and stored therein. Subsequently, the liquid stored in the container is supplied to the head. Therefore, it is possible to limit the entry of liquid bubbles into the head and to eject the liquid stored in the liquid reservoir until the remaining amount of liquid in the liquid reservoir is reduced. Furthermore, a back pressure control mechanism is not required in the liquid reservoir. Therefore, it is possible to increase the volumetric capacity of the liquid that can be stored in the liquid reservoir while miniaturizing the liquid supply system including the liquid reservoir.

[0008] According to aspects of this disclosure, the container may include: the communicating portion; a first valve disposed at the liquid flow path; and a second valve disposed at the gas flow path. The first and second valves may be configured to change from a closed state to an open state in response to a transition from a detached state (where the liquid reservoir is not attached to the container) to an attached state. The first and second valves may be further configured to change from an open state to a closed state in response to a transition from the attached state to the detached state.

[0009] In the liquid dispensing device constructed as described above, the first valve is closed in the separated state. Therefore, leakage of liquid from the container can be prevented. In the separated state, the internal space of the liquid reservoir is not connected to the atmosphere. Therefore, leakage of liquid from the individual liquid reservoir can be prevented. Furthermore, since a labyrinth structure or semi-permeable membrane is not required in the liquid reservoir, the structure of the liquid reservoir is simplified.

[0010] According to an aspect of this disclosure, the liquid reservoir may include: a third valve disposed at the liquid flow path; and a fourth valve disposed at the gas flow path. The third and fourth valves may be configured to change from a closed state to an open state in response to the transition from the attached state to the disconnected state. The third and fourth valves may be further configured to change from the open state to the closed state in response to the transition from the connected state to the disconnected state.

[0011] According to an aspect of this disclosure, in the attached state, the container and the liquid reservoir can be brought from a state to an equilibrium state, in which gas moves from the interior space of the container to the interior space of the liquid reservoir through the gas flow path, and liquid moves from the interior space of the liquid reservoir to the interior space of the container through the liquid flow path, in which the movement of gas and liquid is stopped.

[0012] According to an aspect of this disclosure, the communication portion may include a communication valve configured to switch between an open state and a closed state. The communication valve may be further configured such that, in a detached state where the liquid reservoir is not attached to the container, the communication valve is closed.

[0013] In the liquid ejection device constructed as described above, the internal space of the container is not connected to the atmosphere in the separated state. Therefore, leakage of liquid from the container can be prevented.

[0014] According to an aspect of this disclosure, the liquid dispensing device may further include a carriage configured to move in a specified direction, on which the head is mounted. The liquid dispensing device may further include a controller configured to move the carriage to a liquid reservoir replacement position in response to receiving a command to replace the liquid reservoir. The connecting valve may be further configured to change from an open state to a closed state in response to the carriage moving to the liquid reservoir replacement position. The connecting valve may be further configured to change from a closed state to an open state in response to the carriage moving away from the liquid reservoir replacement position.

[0015] In the liquid ejection device constructed as described above, the connecting valve switches between an open and closed state in response to the movement of the carriage. Therefore, it is possible to control whether the internal space of the container is connected to the atmosphere.

[0016] According to an aspect of this disclosure, the liquid ejection device may further include a controller configured to: in response to receiving a command to replace the liquid reservoir, change the connecting valve from the open state to the closed state.

[0017] According to an aspect of this disclosure, the liquid dispensing device may further include a cover movable between a first position and a second position, wherein in the first position the cover covers the liquid reservoir, and in the second position the cover is removed from the liquid reservoir. The connecting valve may be further configured such that, in response to the cover moving from the first position to the second position (where the cover is removed from the liquid reservoir), the connecting valve changes from the open state to the closed state. The connecting valve may also be further configured such that, in response to the cover moving from the second position to the first position, the connecting valve changes from the closed state to the open state.

[0018] According to an aspect of this disclosure, the connecting valve may be further configured such that, in response to a transition from the attached state to the disconnected state in which the liquid reservoir is not attached to the container, the connecting valve changes from the open state to the closed state. The connecting valve may be further configured such that, in response to a transition from the disconnected state to the attached state, the connecting valve changes from the closed state to the open state.

[0019] According to an aspect of this disclosure, the connecting portion may include a semi-permeable membrane located above the surface level of the liquid stored in the container after the surface level of the liquid stored in the liquid reservoir has been brought to an equilibrium state.

[0020] In the liquid ejection device constructed as described above, the semipermeable membrane is positioned higher than the surface level of the liquid stored in the container. Therefore, malfunction of the semipermeable membrane can be prevented.

[0021] According to aspects of this disclosure, the connecting portion can be further configured such that, in response to a transition from a separated state to the attached state, the connecting portion changes from a closed state to an open state. The connecting portion can also be further configured such that, in response to a transition from the attached state to the separated state, the connecting portion changes from the open state to the closed state.

[0022] In the liquid dispensing device constructed as described above, the communication section switches between an open state and a closed state in response to the liquid reservoir being attached to or detached from the container. Therefore, it is possible to control whether the internal space of the container is connected to the atmosphere via the internal space of the liquid reservoir.

[0023] According to aspects of this disclosure, the liquid reservoir may be further configured to be horizontally attached to the container.

[0024] According to aspects of this disclosure, the liquid reservoir can be further configured to be vertically attached to the container.

[0025] According to aspects of this disclosure, the liquid reservoir may be further configured to be attached to the container at an angle.

[0026] According to an aspect of this disclosure, the liquid ejection device may further include a detector configured to detect the surface of the liquid stored in the container. A portion of the detector may be located within the container.

[0027] In the liquid ejection device constructed as described above, the liquid reservoir does not need to have the function of detecting the surface of the liquid stored therein. Therefore, the liquid reservoir can be miniaturized.

[0028] According to aspects of this disclosure, the container may have a first base and a first extension, the first extension extending from the upper portion of the first base. In this case, the liquid reservoir may have a second base and a second extension, the second extension extending from the lower portion of the second base.

[0029] In the liquid ejection device constructed as described above, the gas layer in which liquid does not exist in the liquid reservoir can be reduced, and the amount of liquid that can be stored in the liquid reservoir can be increased.

[0030] According to aspects of this disclosure, the container may have a first base and a first extension, the first extension extending from the lower portion of the first base. In this case, the liquid reservoir may have a second base and a second extension, the second extension extending from the upper portion of the second base.

[0031] In the liquid ejection device constructed as described above, the liquid ejection time period after the amount of liquid stored in the liquid reservoir decreases can be extended.

[0032] According to an aspect of this disclosure, the container may have an outlet configured to allow the liquid stored in the container to flow out through the outlet. The outlet may be located below the liquid flow path.

[0033] In the liquid ejection device constructed as described above, the amount of liquid remaining in the liquid reservoir can be reduced.

[0034] According to an aspect of this disclosure, the gas flow path can be further configured such that when the liquid reservoir is attached to the container, the gas flow path enters a communicable state simultaneously with or earlier than the liquid flow path.

[0035] In the liquid ejection device constructed as described above, when the pressure in the liquid reservoir is high, it is possible to suppress the movement of liquid stored in the liquid reservoir into the container and limit the movement of liquid and bubbles to the vicinity of the connecting part.

[0036] According to an aspect of this disclosure, the gas flow path can be further configured such that when the liquid reservoir is attached to the container, the gas flow path enters the connectable state later than the liquid flow path.

[0037] In the liquid ejection device constructed as described above, the possibility of liquid leakage from components in the liquid flow path can be reduced.

[0038] According to an aspect of this disclosure, the gas flow path can be further configured such that when the liquid reservoir is removed from the container, the gas flow path enters a non-communicating state simultaneously with or later than the liquid flow path.

[0039] In the liquid ejection device constructed as described above, the liquid reservoir can be removed from the container after the pressure in the box has been brought to atmospheric pressure.

[0040] According to an aspect of this disclosure, the gas flow path can be further configured such that when the liquid reservoir is removed from the container, the gas flow path enters a non-connectable state earlier than the liquid flow path.

[0041] In the liquid ejection device constructed as described above, the possibility of liquid leakage from components in the liquid flow path can be reduced.

[0042] According to an aspect of this disclosure, the connecting portion may include: a semi-permeable membrane; and a labyrinth structure disposed between the interior space of the container and the semi-permeable membrane.

[0043] In the liquid ejection device constructed as described above, the evaporation of liquid stored in the container can be suppressed.

[0044] According to an aspect of this disclosure, the liquid reservoir may have the connecting portion configured to communicate the internal space of the liquid reservoir with the atmosphere. In this case, the internal space of the container can communicate with the atmosphere through the connecting portion and the gas flow path.

[0045] In the liquid ejection device constructed as described above, the internal space of the container is connected to the atmosphere via the internal space of the liquid reservoir.

[0046] According to an aspect of this disclosure, a liquid reservoir is further provided, the liquid reservoir including a first reservoir valve disposed in a liquid flow path when the liquid reservoir is detachably attached to a container of a liquid dispensing device. The liquid reservoir further includes a second reservoir valve disposed in a gas flow path when the liquid reservoir is attached. The liquid flow path and the gas flow path are configured to communicate with the internal space of the container and the internal space of the liquid reservoir when the liquid reservoir is attached. The first reservoir valve and the second reservoir valve are configured to change from a closed state to an open state in response to a transition from a detached state (where the liquid reservoir is not attached to the container) to the attached state. The first reservoir valve and the second reservoir valve are further configured to change from the open state to the closed state in response to a transition from the attached state to the detached state.

[0047] According to an aspect of this disclosure, the liquid reservoir may further include a communication portion comprising a semi-permeable membrane. The communication portion may be configured to communicate the internal space of the liquid reservoir with the atmosphere.

[0048] According to aspects of this disclosure, the liquid reservoir may further include an identification chip.

[0049] Therefore, based on the liquid ejection device and the liquid reservoir constructed as described above, it is possible to increase the volume ratio of liquid that can be stored in the liquid reservoir while miniaturizing the liquid supply system including the liquid reservoir, and to limit the entry of bubbles into the head after the liquid stored in the liquid reservoir is used up. Attached Figure Description

[0050] Figure 1 This is a perspective view showing a multifunctional peripheral device (hereinafter referred to as "MFP") in an illustrative embodiment according to aspects of this disclosure.

[0051] Figure 2 This is a schematic cross-sectional side view illustrating the internal structure of the printing engine of an MFP in an illustrative embodiment according to aspects of this disclosure.

[0052] Figure 3 This is a cross-sectional side view of the recording device of the printing engine in an illustrative embodiment according to aspects of this disclosure, cut along a plane orthogonal to the left and right directions.

[0053] Figure 4A The configuration of valves 211 and 221 in a separated state, where the container is not attached to the sub-canister, is schematically shown in an illustrative embodiment according to aspects of this disclosure.

[0054] Figure 4B The configuration of valves 211 and 221 is schematically shown in an illustrative embodiment according to aspects of this disclosure during the transition from the separated state to the attached state where the box is attached to the sub-can.

[0055] Figure 4C The configuration of valves 211 and 221 in the attached state is schematically shown in an illustrative embodiment according to aspects of this disclosure.

[0056] Figure 5 This is a functional block diagram of an MFP in an illustrative embodiment according to aspects of this disclosure.

[0057] Figure 6 This is a flowchart illustrating the process of image recording control performed by the controller of an MFP in an illustrative embodiment according to aspects of this disclosure.

[0058] Figure 7A The configuration of valve 251 of the auxiliary tank in a first variation of an aspect of this disclosure is schematically shown.

[0059] Figure 7B The construction of valve 261 of the auxiliary tank in another first variation of an aspect of this disclosure is schematically shown.

[0060] Figure 8 The configuration of valve 271 of the sub-can is schematically shown in another first variation of the present disclosure when the cover is in the first position.

[0061] Figure 9 Schematic illustration in such Figure 8 The same first variant shown depicts the construction of valve 271 of the secondary tank when the cover is in the second position.

[0062] Figure 10A The configuration of valve 281 of the secondary tank in the separated state is schematically shown in another first variation of the present disclosure.

[0063] Figure 10B Schematic illustration in such Figure 10A The same first variant shown illustrates the construction of valve 281 of the auxiliary tank in the attached state.

[0064] Figure 11 This is a cross-sectional side view of the recording device in a second variation of this disclosure, cut along a plane orthogonal to the left and right directions.

[0065] Figure 12AThis is a cross-sectional side view of a recording device in another second variation of an aspect of this disclosure, cut along a plane orthogonal to the left and right directions, the recording device having an actuator and a transmissive sensor.

[0066] Figure 12B This is a cross-sectional side view of a recording device in another second variation of the present disclosure, cut along a plane orthogonal to the left and right directions, the recording device having a transmissive sensor.

[0067] Figure 13 This is a cross-sectional side view of the recording device in a third variation of this disclosure, cut along a plane orthogonal to the left and right directions.

[0068] Figure 14A This is a cross-sectional side view of the recording device in its attached state, in another third variation of an aspect of this disclosure, cut along a plane orthogonal to the left and right directions.

[0069] Figure 14B In such Figure 14A A cross-sectional side view of the recording device in the separated state in the same third variant shown, cut along a plane orthogonal to the left and right directions.

[0070] Figure 15 This is a cross-sectional side view of the recording device in a fourth variation of this disclosure, cut along a plane orthogonal to the left and right directions.

[0071] Figure 16A This is a cross-sectional side view of the recording device in its attached state, in another fourth variation of an aspect of this disclosure, cut along a plane orthogonal to the left and right directions.

[0072] Figure 16B In such Figure 16A A cross-sectional side view of the recording device in the separated state in the same fourth variant shown, cut along a plane orthogonal to the left and right directions.

[0073] Figure 17 This is a cross-sectional side view of the recording device in the fifth variation of this disclosure, cut along a plane orthogonal to the left and right directions.

[0074] Figure 18A The configuration of valves 211 and 221 in the separated state is schematically shown in a fifth variation of an aspect of this disclosure.

[0075] Figure 18B The configuration of valves 211 and 221 is schematically shown in the fifth variation of the present disclosure during the transition from the separated state to the attached state.

[0076] Figure 18CThe configuration of valves 211 and 221 in the attached state is schematically shown in a fifth variation of an aspect of this disclosure.

[0077] Figure 19 This is a cross-sectional side view of the recording device in the sixth variation of this disclosure, cut along a plane orthogonal to the left and right directions.

[0078] Figure 20 This is a cross-sectional side view of the recording device in the seventh variation of this disclosure, cut along a plane orthogonal to the left and right directions.

[0079] Figure 21 This is a perspective view showing a plurality of auxiliary tanks and a plurality of corresponding boxes in an eighth variation of an aspect according to this disclosure. Detailed Implementation

[0080] Note that various connections between components are described in the following description. Note that these connections can generally (and unless otherwise stated) be direct or indirect, and this specification is not intended to limit them in this regard. Aspects of this disclosure may be implemented on a circuit (e.g., an application-specific integrated circuit) or in computer software as a program that can be stored on a computer-readable medium, including but not limited to RAM, ROM, flash memory, EEPROM, CD media, DVD media, temporary storage, hard disk drives, floppy disk drives, permanent storage, etc.

[0081] The following describes illustrative embodiments based on aspects of this disclosure. It should be understood that the illustrative embodiments described below are merely examples based on aspects of this disclosure and can be used in various other combinations and environments, and can be modified or varied as needed within the scope of the inventive concept expressed herein (i.e., without altering the essential points of the inventive concept). In the following description, the direction from the start point to the end point of the arrow may be expressed as a "direction" or "orientation." Additionally, the specific direction along the line connecting the start and end points of the arrow may be simply referred to as the designated "direction." Figure 1 As shown, based on the state where the multi-functional peripheral device (hereinafter referred to as "MFP") 10 is installed and ready for use, the vertical direction 7 can be defined as the up-down direction. With the surface where the opening 13 is set as the front 23, the front-back direction 8 can be defined as a horizontal direction extending from front (or back) to back (or front). When viewing the MFP 10 from the front, the left-right direction 9 can be defined as a horizontal direction extending from left (or right) to right (or left). The vertical direction 7, the front-back direction 8, and the left-right direction 9 are orthogonal to each other.

[0082] [Overall Structure of MFP]

[0083] like Figure 1As shown, the MFP10 has a housing 14 that is generally rectangular in shape. A print engine 11 is located at the lower part of the housing 14. The MFP10 has various functions such as faxing and printing. As a printing function, the MFP10 has the ability to print on a sheet 12 (see...) using an inkjet printing method. Figure 2 The MFP10 has the function of recording images on one side of the sheet 12. Note that the MFP10 can be configured to record images on both sides of the sheet 12. An operation I / F (“I / F” is an abbreviation for “interface”) 17 is provided on the upper part of the housing 14. The operation I / F 17 includes: buttons configured to provide image recording instructions or configure various settings when operated; and a liquid crystal display (hereinafter referred to as “LCD”) configured to display various types of information. In this illustrative embodiment, the operation I / F 17 includes a touch panel that serves as both a button and an LCD.

[0084] like Figure 2 As shown, the printing engine 11 includes a feed tray 20, a sheet feeder 16, an outer guide member 18, an inner guide member 19, two conveying rollers 59, two discharge rollers 44, a pressure plate 42, a recording device 24, and an encoder 35 (see...). Figure 5 ), rotary encoder 65 (see Figure 5 ), controller 130 (see Figure 5 ) and memory 140 (see Figure 5 The components included in the printing engine 11 are housed inside the housing 14. Inside the housing 14, various status sensors (not shown) are configured to detect the status of the MFP 10 and output signals based on the detection results.

[0085] [Feed tray]

[0086] like Figure 1 As shown, an opening 13 is formed in the front 23 of the printing engine 11. The feed tray 20 can be moved to the feed position (i.e., Figure 1 and Figure 2 (as shown in the diagram) and non-feed positions, in which the feed tray 20 is attached to the housing 14 and in which the feed tray 20 is detached from the housing 14. The feed tray 20 is moved to the feed position by being inserted rearward into the housing 14. The feed tray 20 is moved to the non-feed position by being pulled forward from the housing 14.

[0087] The feed tray 20 is formed as a box shape with an open top. The feed tray 20 is configured to accommodate one or more sheets 12 set therein. More specifically, as Figure 2As shown, the feed tray 20 includes a base plate 22 configured to support a stack of sheets 12 placed on the base plate 22. A discharge tray 21 is disposed above the front portion of the feed tray 20. The discharge tray 21 is configured to receive and support sheets 12 whose images have been recorded by the recording device 24 and discharged onto its upper surface. When the feed tray 20 is in the feed position, the sheets 12 supported by the feed tray 20 are allowed to be fed into the transport path 64.

[0088] [Sheet Feeder]

[0089] like Figure 2 As shown, the sheet feeder 16 is positioned below the recording device 24 and above the base plate 22 of the feed tray 20. The sheet feeder 16 includes a pickup roller 25, a pickup arm 26, a drive transmission mechanism 27, and a shaft 28. The pickup roller 25 is rotatably supported at the end of the pickup arm 26. The pickup arm 26 is rotatable about the shaft 28 located at its base in the direction indicated by arrow 29. This allows the pickup roller 25 to contact and separate from one of the topmost sheets 12 of the sheets 12 supported by the feed tray 20 or the feed tray 20.

[0090] Pick-up roller 25 is configured to move from feed motor 102 (see...) Figure 5 The sheet 12, which is supported by the bottom plate 22 of the feed tray 20 in the feed position and is in contact with the pick-up roller 25, is fed into the conveyor path 64. For example, the drive transmission mechanism 27 includes a plurality of meshing gears. Alternatively, in another example, the drive transmission mechanism 27 may include a belt wound around the shaft 28 and the pick-up roller 25.

[0091] [Conveyor Route 64]

[0092] like Figure 2 As shown, the conveyor path 64 extends from the rear end of the feed tray 20. The conveyor path 64 includes a bend 33 and a straight section 34. The bend 33 extends upward and further extends to make a U-shaped turn from rear to front. The straight section 34 extends generally in the front-rear direction 8.

[0093] The curved portion 33 is formed by an outer guide member 18 and an inner guide member 19 facing each other at a specified distance. The outer guide member 18 and the inner guide member 19 extend in the left-right direction 9. The straight portion 34 is formed by a recording device 24 and a pressure plate 42 facing each other at a specified distance in the position where the recording device 24 is located.

[0094] The sheet 12 supported on the feed tray 20 is fed by the pick-up roller 25 and conveyed along the bend 33 to reach the conveyor roller 59. The sheet 12, held by the conveyor roller 59, is conveyed forward along the straight section 34 toward the recording device 24. Then, after the sheet 12 has reached directly below the recording device 24, the recording device 24 records an image on the sheet 12. The sheet 12 with the recorded image is further conveyed forward along the straight section 34 and discharged onto the discharge tray 21. Therefore, in Figure 2 The sheet 12 is conveyed in the conveying direction 15 indicated by the arrow with a dotted line.

[0095] [Conveyor rollers and discharge rollers]

[0096] like Figure 2 As shown, the conveying rollers 59 are arranged to face each other across a straight section 34. Downstream of the conveying rollers 59 in the conveying direction 15, along the straight section 34, a discharge roller 44 is provided.

[0097] The conveyor roller 59 includes a conveyor roller 60 and a clamping roller 61. The clamping roller 61 is disposed below and opposite the conveyor roller 60. The clamping roller 61 is pressed against the conveyor roller 60 by an elastic member (not shown), such as a helical spring. The conveyor roller 59 is configured to hold the sheet 12 between the conveyor rollers 59.

[0098] The discharge roller 44 includes a discharge roller 62 and a toothed roller 63. The toothed roller 63 is disposed above and opposite the discharge roller 62. The toothed roller 63 is pressed against the discharge roller 62 by an elastic member (not shown), such as a helical spring. The discharge roller 44 is configured to hold the sheet 12 between the discharge rollers 44.

[0099] The conveyor roller 60 and the discharge roller 62 are configured to pass through the conveyor motor 101 (see...) Figure 5 The sheet 12 is rotated by the driving force of the conveyor roller 60. When the conveyor roller 60 is rotated while the sheet 12 is being held between the conveyor rollers 59, the sheet 12 is conveyed by the conveyor rollers 59 in the conveying direction 15 and fed onto the pressure plate 42. When the discharge roller 62 is rotated while the sheet 12 is being held between the discharge rollers 44, the sheet 12 is conveyed by the discharge rollers 44 in the conveying direction 15 and discharged onto the discharge tray 21. A common motor can be used as both the conveyor motor 101 and the feed motor 102. In this case, the drive transmission path from the common motor to each roller can be switchable.

[0100] The components that can be used to convey the sheet 12 are not limited to the aforementioned rollers, such as the conveyor roller 59 and the discharge roller 44. For example, a conveyor belt can be used instead of the conveyor roller 59 and the discharge roller 44.

[0101] [Pressure plate]

[0102] like Figure 2 As shown, pressure plate 42 is disposed along the straight portion 34 of conveying path 64. Pressure plate 42 is positioned opposite recording device 24 in the vertical direction 7. Pressure plate 42 supports sheet 12 being conveyed along conveying path 64 from below. Sheet 12 being conveyed along conveying path 64 passes through the area between the right and left ends of pressure plate 42 in the left-right direction 9 (hereinafter referred to as the "medium passage area").

[0103] [Recording device]

[0104] like Figure 2 As shown, the recording device 24 is positioned above and opposite the pressure plate 42. The recording device 24 includes a carriage 40, a head 38, and a secondary container 210. A cartridge 220 containing ink 90 is detachably attached to the secondary container 210.

[0105] The carriage 40 is supported by two guide rails 56 and 57, enabling it to move in a left-right direction 9 orthogonal to the conveying direction 15. The two guide rails 56 and 57 are spaced apart from each other in the front-rear direction 8. The carriage 40 can move in the left-right direction 9 from the right side of the right end of the medium passage area to the left side of the left end of the medium passage area. Note that the direction in which the carriage 40 can move is not limited to the left-right direction 9, but can be any direction intersecting the conveying direction 15.

[0106] Guide rail 56 is located upstream of head 38 in the conveying direction 15. Guide rail 57 is located downstream of head 38 in the conveying direction 15. Guide rails 56 and 57 are supported by side frames (not shown) located outside the straight portion 34 of conveying path 64 in the left-right direction 9. Carriage 40 is configured to be driven by carriage drive motor 103 (see... Figure 5 It moves due to the driving force of ).

[0107] An encoder 35 is installed at one of guide rails 56 and 57 (see...). Figure 5 The encoder 35 includes an encoder bar and an optical sensor. The encoder bar extends in the left-right direction 9. The optical sensor is disposed in the carriage 40 facing the encoder bar. The encoder bar is marked with a pattern in which light-transmitting areas and light-blocking areas are arranged alternately at regular intervals along the left-right direction 9. The optical sensor is configured to detect the light-transmitting and light-blocking areas, thereby outputting a pulse signal. The pulse signal is a signal corresponding to the position of the carriage 40 in the left-right direction 9. The pulse signal is output to the controller 130 (see...). Figure 5 ).

[0108] The head 38 is supported by the carriage 40. The lower surface 68 of the head 38 protrudes downwards and faces the pressure plate 42. The head 38 includes: a plurality of nozzles 39; an ink channel 37; and a piezoelectric element 45 (see...). Figure 5 ).

[0109] The plurality of nozzles 39 have corresponding openings in the lower surface 68 of the head 38. An ink channel 37 connects the auxiliary tank 210 to the plurality of nozzles 39. A piezoelectric element 45 (see...) Figure 5 The piezoelectric element 45 is configured to deform a portion of the ink channel 37, thereby ejecting ink droplets downward from the nozzle 39. The piezoelectric element 45 is further configured to be controlled by the controller 130 (see...). Figure 5 It operates when powered on. Therefore, the head 38 has a nozzle 39 for ejecting ink.

[0110] like Figure 3 As shown, the sub-can 210 has an internal space 219. The cartridge 220 has an internal space 229. The internal space 229 of the cartridge 220 is configured to store a specified amount of ink 90. ​​The internal space 219 of the sub-can 210 is configured to store ink 90 supplied from the cartridge 220.

[0111] In this illustrative embodiment, the recording device 24 has a secondary container 210. A cartridge 220 is attached to the secondary container 210. Initially, a specified amount of black ink 90 is stored in the cartridge 220. The secondary container 210 is configured to store black ink 90 supplied from the carriage 220. Note that the color of the ink 90 stored in the cartridge 220 and subsequently in the secondary container 210 is not limited to black. Additionally, the cartridge 220 may have an identification chip (not shown).

[0112] The sub-canister 210 is located above the head 38. In this illustrative embodiment, the entire sub-canister 210 is located above the head 38. However, a portion of the sub-canister 210 may be positioned above the head 38, and other portions of the sub-canister 210 may be positioned equal to or below the head 38. The lower wall 210b of the sub-canister 210 is provided with an outlet 215. This outlet 215 is configured to allow ink 90 stored in the sub-canister 210 to flow out through the outlet 215. The outlet 215 is connected to one end of the ink channel 37. The internal space 219 of the sub-canister 210 communicates with the plurality of nozzles 39 via the ink channel 37. Thus, ink 90 can be supplied from the internal space 219 of the sub-canister 210 to the nozzles 39.

[0113] [Mexico Supply System]

[0114] Box 220 is horizontally attached to sub-can 210. Hereinafter, the state in which box 220 is attached to sub-can 210 can be referred to as the "attached state". At the same time, the state in which box 220 is not attached to sub-can 210 can be referred to as the "separated state". Figure 3 A longitudinal section of the recording device 24 in the attached state is shown schematically.

[0115] like Figure 3As shown, the auxiliary can 210 and the box 220 have approximately the same dimensions in the vertical direction. The auxiliary can 210 has a first base 217 and a first extension 218. The first base 217 has a bottom surface positioned relatively low. The first base 217 is formed in a rectangular shape. The first extension 218 has a bottom surface positioned higher than the bottom surface of the first base 217. The first extension 218 is formed in a rectangular shape. The first extension 218 extends from the upper part of the first base 217.

[0116] The box 220 has a second base 227 and a second extension 228. The second base 227 has an upper surface positioned relatively high. The second base 227 is formed in a rectangular shape. The second extension 228 has an upper surface positioned lower than the upper surface of the second base 227. The second extension 228 is also formed in a rectangular shape. The second extension 228 extends from the lower part of the second base 227.

[0117] The first extension 218 and the second extension 228 have approximately the same dimensions in the front-rear direction 8. The sum of the dimensions of the first extension 218 and the second extension 228 in the vertical direction 7 is approximately the same as the vertical dimension of the sub-can 210 and the box 220. In the attached state, the second extension 228 fits into the space below the first extension 218. Therefore, the box 220 has a shape that allows it to be easily attached to the sub-can 210.

[0118] exist Figure 3 In the example shown, the secondary can 210 is shaped such that its upper portion extends forward. Additionally, the box 220 is shaped such that its lower portion extends rearward. However, the shapes of the secondary can and the box are not limited to these specific shapes. Figure 3 The shapes of the auxiliary cans and boxes shown are... Figure 3 The shapes of the secondary cans and boxes shown are merely examples. For example, as... Figure 13 As shown, the secondary can 310 can be shaped such that its lower portion extends forward. In this case, the box 320 can be shaped such that its upper portion extends rearward. In another example, as... Figure 14A and Figure 14B As shown, the auxiliary can 410 and the box 420 may not have extensions.

[0119] Sub-tank 210 has valves 211 and 212 inside. Box 220 has valves 221 and 222 inside. Valve 211 is located in the lower front position within the internal space 219 of sub-tank 210. Valve 212 is located in the upper front position within the internal space 219 of sub-tank 210. Valve 221 is located in the lower rear position within the internal space 229 of box 220. Valve 222 is located in the upper rear position within the internal space 229 of box 220. In the attached state, with box 220 attached to sub-tank 210, valves 211 and 221 are located at the liquid flow path 201, which is brought into a communicable state. In the attached state, valves 211 and 221 are located at the gas flow path 202, which is brought into a communicable state. In the attached state, valves 211 and 221 are opposite each other across the liquid flow path 201. In the attached state, valves 212 and 222 are positioned opposite each other across the gas flow path 202. Box 220 does not have a back pressure control mechanism. Furthermore, the positions of valves 211, 212, 221, and 222 are not limited to the aforementioned positions; the aforementioned positions are merely examples.

[0120] In the disconnected state, where the container 220 is not attached to the sub-container 210, valves 211, 212, 221, and 222 are all in a closed state. In response to the transition from the disconnected state to the attached state, valves 211, 212, 221, and 222 are all moved from the closed state to the open state. Therefore, the liquid flow path 201 connecting the sub-container 210 and the container 220 via valves 211 and 221, and the gas flow path 202 connecting the sub-container 210 and the container 220 via valves 212 and 222, are brought into a communicable state. Thus, the internal space 219 of the sub-container 210 and the internal space 229 of the container 220 are communicated with each other via the liquid flow path 201 and the gas flow path 202. In response to the transition from the attached state to the disconnected state, valves 211, 212, 221, and 222 are all moved from the open state to the closed state. Therefore, the liquid flow path 201 and the gas flow path 202 are brought to a non-connected state, in which the internal space 219 of the auxiliary tank 210 and the internal space 229 of the box 220 are not connected to each other.

[0121] An atmospheric communication hole 213 is formed on the upper wall 210a of the auxiliary can 210. A semi-permeable membrane 214 is affixed to this atmospheric communication hole 213 to cover and seal it. The semi-permeable membrane 214 is a porous membrane with tiny pores that block the passage of ink but allow the passage of gas. For example, the semi-permeable membrane 214 is made of a fluoropolymer (e.g., polytetrafluoroethylene, polychlorotrifluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, and tetrafluoroethylene-ethylene copolymer). Therefore, the ink 90 stored in the internal space 219 of the auxiliary can 210 is blocked by the semi-permeable membrane 214, thereby preventing it from moving to the outside of the auxiliary can 210 through the atmospheric communication hole 213. On the other hand, air is allowed to move freely between the internal space 219 of the auxiliary can 210 and the outside.

[0122] Air enters the internal space 219 of the auxiliary container 210 and the portion of the internal space 229 of the cartridge 220 where ink 90 is absent. This portion where air has been introduced can be referred to as a "gas layer." An atmospheric communication hole 213 connects the internal space 219 of the auxiliary container 210 (more specifically, the gas layer) to the atmosphere. A labyrinth structure can be provided between the internal space 219 and the semi-permeable membrane 214. When a labyrinth structure is provided, the evaporation of ink 90 stored in the auxiliary container 210 can be suppressed.

[0123] In the initial state, no ink 90 is stored in the internal space 219 of the auxiliary tank 210. A specified amount of ink 90 is stored in the internal space 229 of the cartridge 220. In response to the transition from a separated state to an attached state (i.e., in response to the cartridge 220 being attached to the auxiliary tank 210), the liquid flow path 201 connecting the auxiliary tank 210 and the cartridge 220 via valves 211 and 221, and the gas flow path 202 connecting the auxiliary tank 210 and the cartridge 220 via valves 212 and 222, are brought to an open state. Therefore, air moves from the internal space 219 of the auxiliary tank 210 to the internal space 229 of the cartridge 220 via the gas flow path 202. In addition, the ink 90 stored in the internal space 229 of the cartridge 220 moves to the internal space 219 of the auxiliary tank 210 via the liquid flow path 201. Ink 90 is supplied from cartridge 220 to auxiliary container 210 until the liquid surface level of ink 90 stored in the internal space 219 of auxiliary container 210 becomes the same as the liquid surface level of ink 90 stored in the internal space 229 of cartridge 220. The state in which the movement of ink 90 and air between auxiliary container 210 and cartridge 220 is balanced (i.e., the state in which these movements are approximately stopped) can be called an "equilibrium state".

[0124] Approximately simultaneously with image recording and the outflow of ink 90 from the sub-tank 210 through the outlet 215, air moves into the internal space 219 of the sub-tank 210 through the atmospheric communication hole 213 and the semi-permeable membrane 214. A portion of the air that has moved into the sub-tank 210 moves into the internal space 229 of the cartridge 220 through the gas flow path 202. Therefore, the ink 90 contained in the internal space 229 of the cartridge 220 moves into the internal space 219 of the sub-tank 210 via the liquid flow path 201. Ink 90 is supplied from the cartridge 220 to the sub-tank 210 until an equilibrium is reached. Once an equilibrium is reached, the movement of air and the movement of ink 90 cease.

[0125] The semi-permeable membrane 214 is located above the liquid surface level of the ink 90 stored in the auxiliary tank 210 after the liquid surface level of the ink 90 stored in the cartridge 220 has been brought to an equilibrium state. The outlet 215 is located below the liquid flow path 201.

[0126] When cartridge 220 is attached to sub-canister 210, gas flow path 202 can enter the connectable state simultaneously with or before liquid flow path 201. According to this configuration, when the pressure in cartridge 220 is high, the movement of ink 90 stored in cartridge 220 into sub-canister 210 can be suppressed, and the movement of ink 90 and air bubbles to the vicinity of atmospheric connection hole 213 can be limited. In another example, when cartridge 220 is attached to sub-canister 210, gas flow path 202 can enter the connectable state later than liquid flow path 201. According to this configuration, the possibility of ink 90 leaking from components in liquid flow path 201 can be reduced.

[0127] When cartridge 220 is removed from auxiliary tank 210, gas flow path 202 may enter the discontinuity state simultaneously with or later than liquid flow path 201. According to this configuration, cartridge 220 can be removed from auxiliary tank 210 after the pressure in cartridge 220 has been brought to atmospheric pressure. In another example, when cartridge 220 is removed from auxiliary tank 210, gas flow path 202 may enter the discontinuity state earlier than liquid flow path 201. According to this configuration, the possibility of ink 90 leaking from components in liquid flow path 201 can be reduced.

[0128] When box 220 is attached to or removed from sub-tank 210, whether liquid flow path 201 or gas flow path 202 is brought to a connectable or non-connectable state first can be determined by, for example, the detailed construction of valves 211, 212, 221 and 222.

[0129] [Valve Structure]

[0130] Valve 211 and valve 212 have the same construction. Valve 221 and valve 222 have the same construction. The following will refer to... Figures 4A to 4C The corresponding structures of valves 211 and 221 will be described. Valve 211 has a needle 231, a spring 232, a fixing part 233, and a gasket 234. Valve 211 is disposed inside a cylindrical housing 237 located below the auxiliary tank 210. The needle 231 has a contact part, a front part, and a rear part. The front part protrudes forward from the contact part. The rear part protrudes rearward from the contact part. The housing 237 has a side surface and an end face 238 orthogonal to the side surface. The end face 238 has a hole formed at the center of the end face 238. The front part of the needle 231 passes through this hole.

[0131] The front and contact portions of the needle 231 are hollow. A hole 235 is formed on the side surface of the front portion of the needle 231 near the end, connecting to the hollow portion of the needle 231. A hole 236 is formed on the surface 240 of the contact portion of the needle 231, which is the surface closest to the end portion 238, connecting to the hollow portion of the needle 231.

[0132] The rear portion of needle 231 is connected to one end of spring 232. The other end of spring 232 is connected to fixing portion 233. The position of fixing portion 233 is fixed relative to housing 237. Gasket 234 has an annular shape. Gasket 234 is attached to the inner surface of end face 238 and is attached at a position opposite to hole 236. Spring 232 is configured to push needle 231 toward end face 238. Therefore, in the disengaged state, the contact portion of needle 231 contacts gasket 234, and hole 236 is closed by gasket 234 (see...). Figure 4A Therefore, in the separated state where box 220 is not attached to sub-tank 210, valve 211 is closed.

[0133] Valve 221 has a movable part 241, a spring 242, a fixed part 243, and a gasket 244. Valve 221 is disposed inside a cylindrical housing 247 located below box 220. Spring 242 is stronger than spring 232 (i.e., spring 242 has a higher elastic modulus than spring 232). Housing 247 has a side surface and an end portion 248 orthogonal to the side surface. The end portion 248 has a hole 249 into which the tip of needle 231 can be inserted. A receiving part 239 is provided at one end of housing 237. The receiving part 239 is configured to receive housing 247 fitted therein. Therefore, housing 247 can fit into housing 237.

[0134] The movable part 241 has a disc-shaped contact portion and a rear portion protruding rearward from the contact portion. The rear portion of the movable part 241 is connected to one end of a spring 242. The other end of the spring 242 is connected to a fixed part 243. The fixed part 243 is fixed in position relative to the housing 247. The gasket 244 has an annular shape. The gasket 244 is attached to the inner surface of the end face 248 around the hole 249.

[0135] The contact portion of the movable part 241 is sized to close the hole 249. The spring 242 is configured to push the movable part 241 toward the end portion 248. Therefore, in the separated state, the contact portion of the movable part 241 contacts the gasket 244, and the hole 249 is closed by the movable part 241 (see...). Figure 4A Therefore, when the box 220 is not attached to the auxiliary tank 210, the valve 221 is closed.

[0136] like Figure 4B As shown, during the transition from the separated state to the attached state, the front portion of needle 231 contacts the movable portion 241. As the sub-can 210 and box 220 approach each other further, the front portion of needle 231 pushes the movable portion 241 forward. Spring 232 is weaker than spring 242 (i.e., spring 232 has a lower elastic modulus than spring 242). Therefore, spring 232 contracts before spring 242 contracts (more precisely, spring 232 contracts much more than spring 242). As spring 232 contracts, the contact portion of needle 231 separates from gasket 234. Thus, valve 211 is brought to the open state. However, the hole 235 formed in the side surface of needle 231 is closed by gasket 244.

[0137] like Figure 4C As shown, in the attached state, the pressure exerted by the front portion of the needle 231 on the movable portion 241 increases. In this state, the spring 242 is fully contracted, causing the contact portion of the movable portion 241 to separate from the gasket 244. The hole 235 formed in the side surface of the needle 231 separates from the gasket 244. Therefore, the valve 221 is brought to the open state.

[0138] Valves 211, 212, 221, and 222 are all closed in the disconnected state and open in the connected state. In response to the transition from the disconnected state to the connected state, valves 211, 212, 221, and 222 change from the closed state to the open state. In response to the transition from the connected state to the disconnected state, valves 211, 212, 221, and 222 change from the open state to the closed state. Note that as long as valves 211, 212, 221, and 222 change in the aforementioned manner, valves 211, 212, 221, and 222 can have, in addition to... Figures 4A to 4C Constructions other than those shown.

[0139] Rotary encoder

[0140] Figure 5 The rotary encoder 65 shown is mounted on the conveyor motor 101 (see...) Figure 5The rotary encoder 65 includes an encoder disk and an optical sensor. The encoder disk is configured to rotate together with the feed motor 101. The encoder disk has a pattern in which light-transmitting and light-blocking regions are arranged alternately at regular intervals in the circumferential direction. These light-transmitting regions are areas where light passes through. These light-blocking regions are areas where light does not pass through. As the encoder disk rotates, a pulse signal is generated whenever a light-transmitting or light-blocking region is detected by the optical sensor. The generated pulse signal is output to the controller 130 (see [link to controller 130]). Figure 5 The controller 130 calculates the rotation of the conveyor motor 101 based on the pulse signal. Note that the rotary encoder 65 can be located on a rotatable element other than the conveyor motor 101 (e.g., the feed motor 102 or the conveyor roller 60).

[0141] [Controller and memory]

[0142] The following will refer to Figure 5 The construction of controller 130 and memory 140 will be described. Controller 130 is configured to control the overall operation of MFP 10. Controller 130 includes CPU 131 and ASIC 135. Memory 140 includes ROM 132, RAM 133 and EEPROM 134. CPU 131, ASIC 135, ROM 132, RAM 133 and EEPROM 134 are interconnected via internal bus 137.

[0143] ROM 132 stores programs configured to cause the CPU 131 to perform various operations when executed by the CPU 131. RAM 133 can be used as a storage area or as a working area; the storage area temporarily stores data and signals used when the CPU 131 executes programs, while the working area is used for data processing. EEPROM 134 is configured to store settings and flags that must be retained even after the MFP 10 is powered off.

[0144] The ASIC 135 is connected to the conveyor motor 101, the feed motor 102, and the carriage drive motor 103. The ASIC 135 integrates drive circuits, each controlling a corresponding motor 101, 102, and 103. The CPU 131 is configured to output drive signals to the corresponding drive circuits to rotate each motor 101, 102, and 103. Each drive circuit is configured to output drive current to the corresponding motor based on the drive signal obtained from the CPU 131. Therefore, the corresponding motor rotates. Specifically, the controller 130 is configured to control the feed motor 102, thereby causing the sheet feeder 16 to feed the sheet 12. Additionally, the controller 130 is configured to control the conveyor motor 101, thereby causing the conveyor roller 59 and the discharge roller 44 to convey the sheet 12. Furthermore, the controller 130 is configured to control the carriage drive motor 103 to move the carriage 40.

[0145] Additionally, the ASIC 135 is connected to the optical sensor of the rotary encoder 65. The controller 130 is configured to calculate the rotation of the conveyor motor 101 based on the electrical signals received from the optical sensor of the rotary encoder 65. Furthermore, the ASIC 135 is connected to the encoder 35. The controller 130 is configured to identify the position and movement of the carriage 40 based on pulse signals received from the encoder 35.

[0146] The ASIC 135 is connected to the piezoelectric element 45. The piezoelectric element 45 is operated when powered by the controller 130 via a drive circuit (not shown). The controller 130 is configured to control the power supply to the piezoelectric element 45, thereby causing the plurality of nozzles 39 to selectively eject ink droplets from the plurality of nozzles 39. Additionally, the ASIC 135 is connected to a status sensor (not shown). The controller 130 is configured to perform image recording processing and anomaly processing, described later, based on signals received from the status sensor.

[0147] The controller 130 is configured to alternately perform transport and printing processes to record an image on the sheet 12. The transport process involves causing the transport rollers 59 and 44 to transport the sheet 12 by a specified number of line breaks. The controller 130 controls the transport motor 101, thereby causing the transport rollers 59 and 44 to perform the transport process. The printing process involves controlling the power supply to the piezoelectric element 45 while moving the carriage 40 in the left-right direction 9, thereby causing the head 38 to eject ink droplets from the nozzle 39. During the printing process, the carriage 40 is located in the media passage area (i.e., the area between the left and right ends of the pressure plate 42) and is vertically opposed to the pressure plate 42 in the direction 7.

[0148] The controller 130 stops the sheet 12 for a specified time period between the last transport process and the next transport process. Then, during the specified time period when the sheet 12 is stopped, the controller 130 performs the printing process. That is, during the printing process, the controller 130 performs single-pass image recording that causes the head 38 to eject ink droplets from the nozzle 39 while moving the carriage 40 to the left or right. Therefore, a single-pass image recording is performed on the sheet 12.

[0149] The controller 130 is configured to record an image over the entire recordable area of ​​the sheet 12 by alternating and repeatedly performing transport and printing processes. That is, the controller 130 is capable of recording an image on a single sheet 12 through multiple passes. Therefore, in the MFP 10, the carriage 40 can move along the left-right direction 9 together with the head 38, the sub-canister 210, and the cartridge 220 attached to the sub-canister 210. The head 38 is configured to eject ink droplets from the nozzle 39 as the carriage 40 moves left or right along the left-right direction 9.

[0150] The controller 130 is not limited to the controller 130 constructed as described above. For example, the controller 130 may be constructed such that only the CPU 131 performs various processes, or the CPU 131 and ASIC 135 cooperate with each other to perform various processes. In another example, the controller 130 may be constructed such that a single CPU 131 performs processing alone, or multiple CPUs 131 share the processing. In yet another example, the controller 130 may be constructed such that a single ASIC 135 performs processing alone, or multiple ASICs 135 share the processing.

[0151] [Image recording control performed by the controller]

[0152] In the printing engine 11 constructed as described above, the controller 130 performs a series of image recording control processes. In these processes, the controller 130 controls the printing engine 11 to feed the sheet 12 via the sheet feeder 16 and records images on the sheet 12 via the recording device 24. Hereinafter, reference will be made to... Figure 6 The image recording control performed by the controller 130 is described.

[0153] When image recording control is not in progress, the carriage 40 is located outside the media passage area in the left-right direction 9 and is not opposite the pressure plate 42 in the vertical direction 7. Hereinafter, the position of the carriage 40 in this case may be referred to as the "maintenance position".

[0154] Operation I / F17 via MFP10 (see Figure 1Alternatively, a print command can be sent from an external device connected to the MFP10 to the controller 130. This print command contains: a command to begin image recording control; information about the dimensions of the sheet 12; and print data for image recording on the sheet 12.

[0155] In response to receiving a print command (S10: Yes), the controller 130 feeds the sheet 12 supported on the feed tray 20 (S20).

[0156] In S20, the controller 130 drives the feed motor 102. Therefore, the pick-up roller 25 feeds the sheet 12 supported on the feed tray 20 to the conveyor path 64. Additionally, the controller 130 drives the conveyor motor 101. Therefore, after the leading edge of the sheet 12 fed to the conveyor path 64 by the pick-up roller 25 has reached the conveyor roller 59, the conveyor roller 59 conveys the sheet 12 in the conveying direction 15.

[0157] Next, the controller 130 drives the carriage drive motor 103 to move the carriage 40 from the maintenance position to the starting position. This starting position is the position where the carriage 40 begins to move when the controller 130 starts printing (see S30). The starting position is determined based on the printing data. In S20, the feeding operation of the feed sheet 12 and the moving operation of the carriage 40 are performed in parallel.

[0158] Next, the controller 130 performs the printing process (S30). In the printing process of S30, the controller 130 records the image for a single print pass. Specifically, the controller 130 causes the head 38 to eject ink droplets from the nozzle 39 while simultaneously moving the carriage 40 from its starting position. Note that the carriage 40, which has already begun moving from its starting position in S20, can continue moving directly for the printing process without stopping at the starting position. Of course, the carriage 40 can stop once at the starting position.

[0159] Next, based on the information about the size of the sheet 12 contained in the print command and the print data, the controller 130 determines whether image recording on the current sheet 12 has been completed (S40).

[0160] When it is determined in S40 that image recording on the current sheet 12 is incomplete (S40: No), the controller 130 performs a conveying process (S50). Specifically, in the conveying process of S50, the controller 130 drives the conveyor motor 101, causing the conveyor roller 59 and the discharge roller 44 to convey the sheet 12 by a specified number of passes. After that, the controller 130 proceeds to S30.

[0161] When it is determined in S40 that image recording on the current sheet 12 has been completed (S40: Yes), the controller 130 causes the conveying roller 59 and the discharge roller 44 to convey the sheet 12 in the conveying direction 15 and discharge the sheet 12 onto the discharge tray 21 (S60).

[0162] Subsequently, the controller 130 determines whether the image data contained in the print command includes image data that has not yet been recorded on the sheet 12 (i.e., whether there is image data for the next page to be recorded) (S70).

[0163] When there is image data for the next page to be recorded (S70: Yes), controller 130 proceeds to S20. In this case, controller 130 feeds the subsequent sheet 12 from feed tray 20 to conveyor path 64 (S20). Note that the feeding of the subsequent sheet 12 in S20 can be performed in parallel with the discharge of the preceding sheet 12 in S60. When there is no image data for the next page to be recorded (S70: No), controller 130 terminates the series of image recording control processes.

[0164] The above describes an example of how the controller 130 normally performs image recording control. However, the controller 130 may perform: processing for detecting anomalies while performing image recording control (not shown); and processing to be executed when one or more anomalies have been detected (not shown).

[0165] [Beneficial Effects of the Illustrative Examples]

[0166] In the MFP10 of this illustrative embodiment, when cartridge 220 is attached to sub-tank 210, ink 90 in cartridge 220 is transferred to sub-tank 210 and stored there. Then, the ink 90 stored in sub-tank 210 is supplied to head 38. Therefore, air bubbles of ink 90 can be prevented from entering head 38, and the ink 90 stored in cartridge 220 can be ejected until the remaining amount of ink 90 in cartridge 220 is reduced. Furthermore, a back pressure control mechanism is not required in cartridge 220. Therefore, the ink supply system including cartridge 220 can be miniaturized while increasing the volumetric capacity of ink 90 that can be stored in cartridge 220.

[0167] Furthermore, in response to the transition from the separated state to the attached state, valves 211 and 212 in the sub-canister 210 change from the closed state to the open state. In the separated state, when the cartridge 220 is not attached to the sub-canister 210, valve 211 is closed to prevent ink leakage from the sub-canister 210. Moreover, in the separated state, the internal space 229 of the cartridge 220 is not in communication with the atmosphere. Therefore, ink leakage from the individual cartridge 220 can be prevented. Additionally, there is no need to provide a labyrinth structure or a semi-permeable membrane in the cartridge 220. Therefore, the structure of the cartridge 220 can be simplified.

[0168] Furthermore, the semi-permeable membrane 214 is located above the liquid surface level of the ink 90 stored in the auxiliary container 210 in an equilibrium state. Therefore, malfunction of the semi-permeable membrane 214 can be prevented. Additionally, the auxiliary container 210 has a first base 217 and a first extension 218 extending from the upper part of the first base 217. The cartridge 220 has a second base 227 and a second extension 228 extending from the lower part of the second base 227. Therefore, the volume of the gas layer in the cartridge 220 can be reduced, and the amount of liquid that can be stored in the cartridge 220 can be increased. Moreover, the outlet 215 is located below the liquid flow path 201, thus reducing the amount of ink 90 remaining in the cartridge 220.

[0169] While aspects of this disclosure have been described in conjunction with the various example structures outlined above and shown in the accompanying drawings, various alternatives, variations, modifications, improvements, and / or substantial equivalents, whether known or perhaps not currently foreseen, will likely become apparent to those skilled in the art. Therefore, the exemplary embodiments according to aspects of this disclosure as set forth above are intended to illustrate the invention, and not to limit it. Various changes may be made without departing from the spirit and scope of this disclosure. Thus, this disclosure is intended to cover all known or subsequently developed alternatives, variations, modifications, improvements, and / or substantial equivalents. Some specific examples of potential alternatives, variations, or modifications according to aspects of this disclosure are provided below:

[0170] [First Variation]

[0171] Various variations can be applied to the MFP10 according to aspects of this disclosure. In each first variation of the MFP according to aspects of this disclosure, the MFP may include a valve disposed at an atmospheric communication port 213 of the auxiliary tank 210 and configured to be closed in a disassembled state where the housing 220 is not attached to the auxiliary tank 210. Reference will be made below. Figures 7A to 10B An example of a valve configured to be closed in the disconnected state is illustrated.

[0172] exist Figure 7AIn the example shown, an atmospheric connection hole 213 is formed on the right wall 210c of the auxiliary tank 210. The valve 251 has a movable portion 252, a spring 253, and a gasket 254. The valve 251 is located on the outside of the right wall 210c of the auxiliary tank 210, and is positioned such that the valve 251 can block the atmospheric connection hole 213. The movable portion 252 has a flat plate shape. One side of the movable portion 252 is connected to one end of the spring 253. The other end of the spring 253 is connected to the outer surface of the right wall 210c of the auxiliary tank 210. The gasket 254 has an annular shape. The gasket 254 is attached to the outer surface of the right wall 210c of the auxiliary tank 210, and is attached around the atmospheric connection hole 213.

[0173] In response to receiving a command to replace cartridge 220, controller 130 moves carriage 40 to the cartridge replacement position. This cartridge replacement position is, for example, the rightmost position in the left-right direction 9 within the range that carriage 40 can move. When carriage 40 is in a position other than the cartridge replacement position, movable part 252 is positioned away from gasket 254. Therefore, in this case, valve 251 is open.

[0174] A frame 255 located near the cartridge replacement position has a protrusion 256 extending in the left-right direction 9. This protrusion 256 is positioned in the vertical direction 7 and the front-back direction 8 to contact the movable part 252. When the carriage 40 is in the cartridge replacement position, the protrusion 256 contacts the movable part 252. At this time, the spring 253 contracts until the movable part 252 contacts the gasket 254, and the valve 251 is closed.

[0175] Replacement of cartridge 220 is always performed with carriage 40 in the cartridge replacement position. When carriage 40 is in the cartridge replacement position, valve 251 is closed. Therefore, valve 251 is closed in the disassembled state when cartridge 220 is not attached to auxiliary tank 210.

[0176] exist Figure 7B In the example shown, an atmospheric connection hole 213 is formed on the right wall 210c of the auxiliary tank 210. Valve 261 is a solenoid valve having a movable part 262, a solenoid 263, and a gasket 264. Valve 261 is located on the outside of the right wall 210c of the auxiliary tank 210, and is positioned such that valve 261 can block the atmospheric connection hole 213. The movable part 262 has a contact portion formed in the shape of a flat plate; and a shaft protruding to the right from the contact portion. This shaft of the movable part 262 is connected to the solenoid 263. The solenoid 263 is supported by a support 265 provided on the right wall 210c of the auxiliary tank 210.

[0177] Current is supplied to solenoid 263 via a device not shown. Controller 130 controls whether current is applied to solenoid 263. When no current is applied to solenoid 263, movable part 262 is positioned away from gasket 264 (shown by dashed lines) by the action of solenoid 263. At this time, valve 261 is open. When current is applied to solenoid 263, movable part 262 is positioned in contact with gasket 264 by the action of solenoid 263. At this time, valve 261 is closed.

[0178] In response to receiving a command to replace box 220, controller 130 moves carriage 40 to the box replacement position and controls the application of current to solenoid 263. At this time, valve 261 is closed. Therefore, valve 261 is closed in the disassembled state when box 220 is not attached to auxiliary tank 210.

[0179] exist Figure 8 and Figure 9 In the example shown, an atmospheric communication port 213 is formed on the upper wall 210a of the auxiliary tank 210. The valve 271 has a movable portion 272 and a fixed portion 273. An atmospheric communication passage 274, connected to the atmospheric communication port 213, is provided between the movable portion 272 and the fixed portion 273. The atmospheric communication passage 274 is a tube formed of a flexible material.

[0180] The cover 275 is configured to cover the front and upper surfaces of the box 220. The cover 275 is capable of rotating around axis 276. Figure 8 The first position shown is... Figure 9 The device rotates between the second positions shown. The first position is where the cover 275 covers the box 220. The second position is where the cover 275 is away from the box 220. When the cover 275 is in the second position, the box 220 is replaced.

[0181] The movable part 272 is capable of rotating about axis 276 together with the cover 275. When the cover 275 is in the first position, the movable part 272 is not in contact with the atmospheric connection passage 274. Therefore, the atmospheric connection passage 274 is in a connectable state. In this state, the connection portion including the atmospheric connection hole 213 and the atmospheric connection passage 274 is open. When the cover 275 is in the second position, the movable part 272 contacts the atmospheric connection passage 274. In this case, compared to when the cover 275 is in the first position, the movable part 272 is closer to the fixed part 273. Therefore, the atmospheric connection passage 274 deforms by being clamped between the movable part 272 and the fixed part 273 and enters a non-connectable state. In this state, the connection portion is closed.

[0182] In response to receiving a command to replace cartridge 220, controller 130 moves carriage 40 to the cartridge replacement position. When carriage 40 is in the cartridge replacement position, cover 275 is movable between a first position and a second position. As cover 275 moves from the first position to the second position, valve 271 is moved from an open state to a closed state. As cover 275 moves from the second position to the first position, valve 271 is moved from a closed state to an open state.

[0183] When the carriage 40 is in the box replacement position and the cover 275 is in the second position, the box 220 is replaced. When the cover 275 is in the second position, the valve 271 is closed. Therefore, the valve 271 is closed in the disassembled state when the box 220 is not attached to the auxiliary tank 210. A labyrinth structure or a semi-permeable membrane may be provided near the atmospheric connection opening of the atmospheric connection path 274.

[0184] exist Figure 10A and Figure 10B In the example shown, an atmospheric communication hole 213 is formed on the front wall 210d of the auxiliary tank 210. The valve 281 has a movable portion 282, a spring 283, a fixed portion 284, and a gasket 285. The movable portion 282 has a contact portion and a front portion protruding forward from the contact portion. The front portion of the movable portion 282 is inserted into the atmospheric communication hole 213. The contact portion of the movable portion 282 is connected to one end of the spring 283. The other end of the spring 283 is fixed to the fixed portion 284. The gasket 285 is attached to the inner surface of the front wall 210d of the auxiliary tank 210 and is attached around the atmospheric communication hole 213.

[0185] Spring 283 is configured to push movable part 282 toward front wall 210d. Therefore, in the disassembled state where box 220 is not attached to sub-can 210, the contact portion of movable part 282 contacts gasket 285, and atmospheric connection hole 213 is closed by movable part 282 (see...). Figure 10A Therefore, in the separated state, valve 281 is closed. Additionally, in the separated state, a portion of the front of the movable part 282 protrudes from the front wall 210d of the auxiliary tank 210.

[0186] With the housing 220 attached to the sub-canister 210, the front of the movable part 282 contacts the housing of the housing 220. Therefore, the movable part 282 moves backward against the restoring force of the spring 283. This causes the contact portion of the movable part 282 to separate from the gasket 285. At this time, a space is formed between the movable part 282 and the gasket 285. Air flows into the internal space 219 of the sub-canister 210 through the atmospheric communication hole 213 and this space. Therefore, in the attached state, the valve 281 is open.

[0187] Therefore, in response to the transition from the attached state to the disconnected state, valve 281 changes from the open state to the closed state. In response to the transition from the disconnected state to the attached state, valve 281 changes from the closed state to the open state. A labyrinth structure or a semi-permeable membrane may be provided between the internal space 219 of the auxiliary tank 210 and the atmospheric communication port 213.

[0188] Each of the four types of valves 251, 261, 271, and 281 is closed in the disassembled state. Valve 271 changes its state depending on whether cover 275 is open or closed. Valve 281 changes its state depending on whether box 220 is attached to or removed from sub-tank 210. Controller 130 does not control the states of valves 271 and 281.

[0189] On the other hand, since valve 261 is a solenoid valve, controller 130 can control the state of valve 261 at any timing by controlling the current flowing through solenoid 263. In response to receiving a box replacement command, controller 130 changes the state of valve 261 from open to closed. If valve 261 is in the closed state when controller 130 has received the box replacement command, controller 130 will keep valve 261 closed. At other times, controller 130 can control valve 261 to be either open or closed.

[0190] For example, controller 130 may control valve 261 to be open during image recording. In this case, in response to receiving a cartridge replacement command, controller 130 moves carriage 40 to the cartridge replacement position and controls valve 261 from the open state to the closed state. In another example, controller 130 may, in principle, control valve 261 to be closed during image recording, and may control valve 261 to be open in response to determining that it is necessary to open valve 261 to supply ink 90. ​​In this case, the cartridge replacement position may differ from the position where valve 261 is controlled to be open. In yet another example, controller 130 may control valve 261 to be open in a standby state when MFP 10 is not recording images. In this case, the cartridge replacement position may differ from the standby position of MFP 10 in standby state.

[0191] Under the control of the controller 130, the valve 251 changes its state depending on whether the carriage 40 is in the box-changing position. Therefore, the controller 130 is allowed to control the state of the valve 251 at any time by moving the carriage 40 to the box-changing position.

[0192] In each of the first variants of the MFP, a valve is provided at the atmospheric communication port 213, and the valve is closed in the separated state when the cartridge 220 is not attached to the sub-canister 210. Therefore, in the separated state, the internal space 229 of the cartridge 220 is not in communication with the atmosphere, thus preventing ink leakage from the cartridge 220. In addition, by controlling the valve to be closed during image recording, negative pressure can be generated in the sub-canister 210 and the cartridge 220.

[0193] [Other variations]

[0194] The MFP in each second variation according to aspects of this disclosure includes a detector configured to detect the liquid surface of ink 90 stored in the auxiliary tank 210. A portion of the detector may be located within the auxiliary tank 210. Figure 11 As shown, detector 291 includes a prism 292, a light-emitting element 293, and a light-receiving element 294. Prism 292 is disposed on the lower part of the inner surface of the rear wall 210e of the auxiliary container 210. The light-emitting element 293 and the light-receiving element 294 are disposed on the outer surface of the rear wall 210e of the auxiliary container 210. The positions of prism 292 in the vertical direction 7 and the left-right direction 9 correspond to the positions of the light-emitting element 293 and the light-receiving element 294 in the vertical direction 7 and the left-right direction 9, respectively. The rear wall 210e of the auxiliary container 210 is transparent or translucent in the positions corresponding to the light-emitting element 293 and the light-receiving element 294.

[0195] When the liquid level of the ink 90 stored in the auxiliary tank 210 is lower than the vertical position of the detector 291, the light emitted by the light-emitting element 293 is reflected by the prism 292 and incident on the light-receiving element 294. At this time, the detector 291 outputs, for example, a high-level signal to the controller 130. When the liquid level of the ink 90 stored in the auxiliary tank 210 is higher than the vertical position of the detector 291, the light emitted by the light-emitting element 293 is scattered by the ink 90. ​​Therefore, in this case, the level of light that the light-receiving element 294 can detect becomes lower. At this time, the detector 291 outputs, for example, a low-level signal to the controller 130.

[0196] Therefore, the controller 130 can detect the liquid surface level of the ink 90 stored in the auxiliary tank 210 based on the output signal from the detector 291. Furthermore, since a portion of the detector 291 is located in the auxiliary tank 210, the cartridge 220 does not need to have the function of detecting the liquid surface level of the ink 90. ​​Therefore, the cartridge 220 can be miniaturized.

[0197] MFP can include detectors other than the aforementioned detector 291. Figure 12AIn the example shown, an actuator 301 is disposed within the internal space 219 of the auxiliary tank 210. The actuator 301 has a head and a float. The actuator 301 is configured to rotate about an axis 302. The rear wall 210e of the auxiliary tank 210 has a protrusion 210f. Figure 12A In position P1 shown, a translucent sensor (not shown) is positioned to sandwich the left wall (not shown) and right wall (not shown) of the protrusion 210f. The protrusion 210f is transparent or translucent.

[0198] When the liquid level of the ink 90 stored in the auxiliary tank 210 is higher than a specified position, the actuator 301 stands upright. At this time, the transmissive sensor receives the emitted light and outputs, for example, a high-level signal to the controller 130. When the liquid level of the ink 90 stored in the auxiliary tank 210 is lower than the specified position, the actuator 301 rotates about the axis 302, and the head of the actuator 301 enters the protrusion 210f. At this time, the emitted light from the transmissive sensor is blocked by the head of the actuator 301, and the transmissive sensor outputs, for example, a low-level signal. Therefore, using the actuator 301 and the transmissive sensor, the liquid level of the ink 90 stored in the auxiliary tank 210 can be detected.

[0199] exist Figure 12B In the example shown, the rear wall 210e of the auxiliary tank 210 has a protrusion 210f. Figure 12B In position P2 shown, a permeable sensor (not shown) is configured to sandwich the left wall (not shown) and right wall (not shown) of the protrusion 210f.

[0200] When the liquid level of the ink 90 stored in the auxiliary tank 210 is below a specified position, the transmissive sensor receives emitted light and outputs, for example, a high-level signal to the controller 130. When the liquid level of the ink 90 stored in the auxiliary tank 210 is above the specified position, the emitted light from the transmissive sensor is scattered by the ink 90. ​​Therefore, in this case, the level of light detectable by the transmissive sensor becomes lower. At this time, the transmissive sensor outputs, for example, a low-level signal. Therefore, using the transmissive sensor, the liquid level of the ink 90 stored in the auxiliary tank 210 can be detected.

[0201] In each third variation of the aspects of this disclosure, the auxiliary canister and box of the MFP have a shape different from the shape of the auxiliary canister and box of the MFP10 in the foregoing illustrative embodiments. For example... Figure 13As shown, the third variant of the MFP includes a secondary container 310 having a first base 317 and a first extension 318. The first base 317 has an upper surface positioned relatively high. The first extension 318 has an upper surface positioned lower than the upper surface of the first base 317. The first extension 318 extends from the lower part of the first base 317. The cartridge 320 has a second base 327 and a second extension 328. The second base 327 has a bottom surface positioned relatively low. The second extension 328 has a bottom surface positioned higher than the bottom surface of the second base 327. The second extension 328 extends from the upper part of the second base 327. According to this configuration, the ink ejection time period after the amount of ink 90 stored in the cartridge 320 decreases can be extended.

[0202] The secondary can may not have the first extension. The box may not have the second extension. Figure 14A and Figure 14B In the example shown, the secondary can 410 does not have a first extension, but only a first base. The box 420 does not have a second extension, but only a second base.

[0203] In each of the fourth variations of the MFP according to aspects of this disclosure, the cassette can be attached to the sub-can vertically or at an angle. Figure 15 In the example shown, box 340 is attached to sub-tank 330 in the vertical direction 7. Valve 211 is positioned at the upper front in the internal space 339 of sub-tank 330. Valve 212 is positioned at the upper rear in the internal space 339 of sub-tank 330. Valve 221 is positioned at the lower front in the internal space 349 of box 340. Valve 222 is positioned at the lower rear in the internal space 349 of box 340. Valves 211 and 221 are located in the liquid flow path 201, which is brought into a communicable state when box 340 is attached to sub-tank 330. Valves 212 and 222 are located in the gas flow path 202, which is brought into a communicable state when attached. In the attached state, valves 211 and 221 are opposite each other across the liquid flow path 201, and valves 212 and 222 are opposite each other across the gas flow path 202.

[0204] The box can be attached to the secondary can at an angle. Figure 16A and Figure 16B In the example shown, the opposing surfaces of the sub-can 430 and the box 440 are inclined. The box 440 is attached to the sub-can 430 at an angle.

[0205] In the fifth variation of the MFP according to aspects of this disclosure, the atmospheric communication port is not located at the auxiliary tank, but at the box. For example... Figure 17As shown, the auxiliary tank 350 has valves 211 and 212 inside. The box 360 has valves 221 and 222 inside. The auxiliary tank 350 does not have an atmospheric communication hole. The box 360 has an atmospheric communication hole 363 formed at the upper wall 360a of the box 360. A semi-permeable membrane 364 is affixed to the atmospheric communication hole 363 for covering and closing the atmospheric communication hole 363.

[0206] like Figures 18A to 18C As shown, in response to the transition from a disconnected state to an attached state, valves 211 and 221 change from a closed state to an open state. In the fifth variation, spring 242 is weaker than spring 232 (i.e., spring 242 has a lower elastic modulus than spring 232). Therefore, in Figure 18B In the state shown, before spring 232 contracts, spring 242 contracts (more precisely, spring 242 contracts much more than spring 232). As spring 242 contracts, the contact portion of movable part 241 separates from gasket 244. Therefore, valve 221 is brought to the open state. Afterwards, in Figure 18C In the state shown, valve 211 is brought to the open state.

[0207] In response to the transition from a separated state to an attached state, valves 211, 212, 221, and 222 change from a closed state to an open state. In this state, the internal spaces 359 of the auxiliary tank 350 and the internal spaces 369 of the box 360 are interconnected via valves 211 and 221 through a liquid flow path 201, and via valves 212 and 222 through a gas flow path 202. The box 360 has an atmospheric connection hole 363. Therefore, the internal space 359 of the auxiliary tank 350 is connected to the atmosphere via the gas flow path 202 and the atmospheric connection hole 363. Consequently, the ink 90 stored in the box 360 is transferred to the internal space 359 of the auxiliary tank 350 via the liquid flow path 201.

[0208] According to a sixth variation of this disclosure, the MFP is configured to supply ink using a so-called chicken-feeding system. For example... Figure 19 As shown, the container 380 is vertically attached to the auxiliary container 370. A first flow path 371 is provided below valve 211. A second flow path 372 is provided below valve 221. The lower end of the first flow path 371 is higher than the lower end of the second flow path 372. In this case, the flow path connected to the first flow path 371 via valve 211 serves as a liquid flow path 201. The flow path connected to the second flow path 372 via valve 212 serves as a gas flow path 202.

[0209] When image recording is performed and the ink 90 stored in the auxiliary tank 370 flows out from the outlet 215, the liquid surface level of the ink 90 stored in the auxiliary tank 370 decreases. When the liquid surface level becomes lower than the lower end of the second flow path 372, air moves into the second flow path 372. The moving air moves to the internal space 389 of the cartridge 380 through the gas flow path 202. Therefore, the ink 90 stored in the internal space 389 of the cartridge 380 moves to the internal space 379 of the auxiliary tank 370 through the liquid flow path 201. Thus, ink 90 is supplied from the cartridge 380 to the auxiliary tank 370.

[0210] When ink 90 is supplied from cartridge 380 to auxiliary tank 370, the liquid surface level of the ink 90 stored in auxiliary tank 370 rises. When the liquid surface level becomes higher than the lower end of the first flow path 371, the movement of ink 90 through liquid flow path 201 stops. In this way, an appropriate amount of ink 90 is supplied from cartridge 380 to auxiliary tank 370.

[0211] In the seventh variation of the MFP according to aspects of this disclosure, such as Figure 20 As shown, head 38 is mounted on a carriage (not shown), but secondary can 210 and box 220 are not mounted on the carriage. Head 38 and secondary can 210 are connected to each other using a flexible tube 47. Secondary can 210 communicates with head 38 through tube 47.

[0212] Sub-can 210 and box 220 are positioned in their respective designated locations not on the carriage. For example... Figure 20 As shown, the secondary tank 210 and the box 220 can be set lower than the head 38.

[0213] The MFP of the eighth variant according to aspects of this disclosure includes multiple auxiliary tanks. For example, such as Figure 21 As shown, the recording device 24 may have four sub-tanks 210M, 210C, 210Y, and 210B. The sub-tanks 210M, 210C, 210Y, and 210B are arranged in the left-right direction 9. An atmospheric communication hole 213 and a semi-permeable membrane 214 are provided at each of the sub-tanks 210M, 210C, 210Y, and 210B.

[0214] Sub-can 210M is configured to be detachably attached to a box 220M, which stores magenta ink (not shown). Sub-can 210C is configured to be detachably attached to a box 220C, which stores cyan ink (not shown). Sub-can 210Y is configured to be detachably attached to a box 220Y, which stores yellow ink (not shown). Sub-can 210B is configured to be detachably attached to a box 220B, which stores black ink (not shown).

[0215] Note that the arrangement order of auxiliary tanks 210M, 210C, 210Y, and 210B is not limited to... Figure 21 The order shown. The corresponding dimensions of sub-tanks 210M, 210C, 210Y, and 210B may be the same as each other or may be different from each other.

[0216] The above description, as an example of a liquid reservoir, illustrates an ink cartridge that can be removed by the user when the stored ink is depleted. However, a liquid reservoir can also be a canister that cannot be removed by the user when the stored ink is depleted. A liquid ejector device with a canister can be configured to continuously print by the user refilling ink from an inlet located at the canister. A liquid ejector device with such a canister can have a secondary canister between the canister and the printhead. In this case, the canister can be configured to be detachably attached to the secondary canister. Therefore, manufacturers can provide a product lineup of various types of liquid ejector devices by replacing different types of canisters with different shapes and / or volumes. Moreover, by modularizing the components included in each liquid ejector device and increasing the number of detachably attachable parts, it is easier to provide liquid ejector devices that can be used for extended periods by replacing damaged parts with new ones. Furthermore, by making each type of canister detachable from the secondary canister, it is possible to provide liquid ejector devices that can be used for extended periods by replacing damaged canisters with new ones. Note that an MFP without a liquid reservoir (box or tank) may be an example of a liquid dispensing device according to aspects of this disclosure. An MFP with a liquid reservoir may be an example of a liquid dispensing device according to aspects of this disclosure.

[0217] The following illustrates examples of the association between the elements illustrated in the foregoing illustrative embodiments and variations and the elements according to aspects of this disclosure. For example, MFP10 may be an example of a "liquid dispensing device" according to aspects of this disclosure. Head 38 may be an example of a "head" according to aspects of this disclosure. Sub-tank 210 may be an example of a "container" according to aspects of this disclosure. Atmospheric vents 213 and 363 may be included in an example of a "communication" according to aspects of this disclosure. Atmospheric vent 274 may be included in an example of a "communication" according to aspects of this disclosure. Container 220 may be an example of a "liquid reservoir" according to aspects of this disclosure. Ink 90 may be an example of a "liquid" according to aspects of this disclosure. Valve 211 may be an example of a "first valve" according to aspects of this disclosure. Valve 212 may be an example of a "second valve" according to aspects of this disclosure. Valve 221 may be an example of a "third valve" according to aspects of this disclosure, or may be an example of a "first reservoir valve" according to aspects of this disclosure. Valve 222 may be an example of a "fourth valve" according to aspects of this disclosure, or may be an example of a "second reservoir valve" according to aspects of this disclosure. Valves 251, 261, 271, and 281 may be included in an example of a "connecting valve" according to aspects of this disclosure. Detector 291 may be an example of a "detector" according to aspects of this disclosure. Prism 292 may be an example of a "part of a detector" according to aspects of this disclosure. Carriage 40 may be an example of a "carriage" according to aspects of this disclosure. Controller 130 may be an example of a "controller" according to aspects of this disclosure. Cover 275 may be an example of a "cover" according to aspects of this disclosure. Semi-permeable membrane 214 may be an example of a "semi-permeable membrane" according to aspects of this disclosure. Outlet 215 may be an example of an "outlet" according to aspects of this disclosure.

Claims

1. A liquid ejection device, comprising: A head having a nozzle configured to eject liquid; A container connected to the head, the container being configured to store the liquid; A connecting portion, the connecting portion being configured to connect the internal space of the container to the atmosphere; and A liquid reservoir is located outside the head and configured to store the liquid. The liquid reservoir is also configured to be detachably attached to the container, wherein, in the attached state, the internal space of the liquid reservoir communicates with the internal space of the container via a liquid flow path and a gas flow path. In the attached state, when the container liquid-filling region in the internal space of the container is connected to the reservoir liquid-filling region in the internal space of the liquid reservoir via the liquid flow path, the reservoir gas-filling region in the internal space of the liquid reservoir is connected to the container gas-filling region in the internal space of the container via the gas flow path, and the container gas-filling region is connected to the atmosphere via the connecting portion of the container, wherein no liquid-filling region is located between the reservoir gas-filling region and the atmosphere. The gas filling area of ​​the container is in direct contact with the liquid filling area of ​​the container, and the gas filling area of ​​the reservoir is in direct contact with the liquid filling area of ​​the reservoir.

2. The liquid ejection device according to claim 1, The container mentioned above includes: The connecting portion; A first valve is disposed at the liquid flow path; and A second valve is located at the gas flow path, and The first valve and the second valve are configured such that: In response to the transition from a disconnected state (where the liquid reservoir is not attached to the container) to an attached state, the first valve and the second valve change from a closed state to an open state; and In response to the transition from the attached state to the disconnected state, the first valve and the second valve change from the open state to the closed state.

3. The liquid ejection device according to claim 2, The liquid reservoir includes: A third valve is disposed at the liquid flow path; and A fourth valve, which is located at the gas flow path, and The third valve and the fourth valve are configured as follows: In response to the transition from the separated state to the attached state, the third valve and the fourth valve change from a closed state to an open state; and In response to the transition from the attached state to the disconnected state, the third valve and the fourth valve change from the open state to the closed state.

4. The liquid ejection device according to any one of claims 1 to 3, In the attached state, the container and the liquid reservoir are brought from one state to an equilibrium state, in which gas moves from the internal space of the container to the internal space of the liquid reservoir through the gas flow path, and liquid moves from the internal space of the liquid reservoir to the internal space of the container through the liquid flow path, and in the equilibrium state, the movement of gas and liquid is stopped.

5. The liquid ejection device according to any one of claims 1 to 3, The connecting portion includes a connecting valve configured to switch between an open state and a closed state, and the connecting valve is further configured to be closed in a detached state where the liquid reservoir is not attached to the container.

6. The liquid ejection device according to claim 5, further comprising: A carriage configured to move in a specified direction, on which the head is mounted; and A controller, configured to move the carriage to the liquid reservoir replacement position in response to receiving a command to replace the liquid reservoir. The connecting valve is further configured to change from the open state to the closed state in response to the carriage moving to a different position of the liquid reservoir, and The connecting valve is further configured to change from the closed state to the open state in response to the carriage moving away from the liquid reservoir to change position.

7. The liquid ejection device of claim 5, further comprising a controller configured to: in response to receiving a command to replace the liquid reservoir, change the connecting valve from the open state to the closed state.

8. The liquid dispensing device of claim 5, further comprising a cover movable between a first position and a second position, wherein in the first position the cover covers the liquid reservoir, and in the second position the cover is removed from the liquid reservoir. The connecting valve is further configured as follows: In response to the cap moving from the first position to the second position where the cap is away from the liquid reservoir, the connecting valve changes from the open state to the closed state; and In response to the cover moving from the second position to the first position, the connecting valve changes from the closed state to the open state.

9. The liquid ejection device according to claim 5, The connecting valve is further configured as follows: In response to the transition from the attached state to the disconnected state where the liquid reservoir is not attached to the container, the connecting valve changes from the open state to the closed state; and In response to the transition from the disconnected state to the connected state, the connecting valve changes from the closed state to the open state.

10. The liquid ejection device according to any one of claims 1 to 3, The connecting portion includes a semi-permeable membrane located above the surface level of the liquid stored in the container after the surface level of the liquid stored in the liquid reservoir has been brought to an equilibrium state.

11. The liquid ejection device according to any one of claims 1 to 3, The connecting portion is further configured as follows: In response to the transition from a detached state (where the liquid reservoir is not attached to the container) to an attached state, the connecting portion changes from a closed state to an open state, and In response to the transition from the attached state to the separated state, the connecting portion changes from the open state to the closed state.

12. The liquid ejection device according to any one of claims 1 to 3, The liquid reservoir is further configured to be horizontally attached to the container.

13. The liquid ejection device according to any one of claims 1 to 3, The liquid reservoir is further configured to be vertically attached to the container.

14. The liquid ejection device according to any one of claims 1 to 3, The liquid reservoir is further configured to be attached to the container at an angle.

15. The liquid ejection device according to any one of claims 1 to 3, further comprising a detector configured to detect the surface of the liquid stored in the container. A portion of the detector is located within the container.

16. The liquid ejection device according to any one of claims 1 to 3, The container has a first base and a first extension, the first extension extending from the upper part of the first base, and The liquid reservoir has a second base and a second extension, the second extension extending from the lower part of the second base.

17. The liquid ejection device according to any one of claims 1 to 3, The container has a first base and a first extension, the first extension extending from the lower part of the first base, and The liquid reservoir has a second base and a second extension, the second extension extending from the upper part of the second base.

18. The liquid ejection device according to any one of claims 1 to 3, The container has an outlet configured to allow the liquid stored in the container to flow out through the outlet, which is located below the liquid flow path.

19. The liquid ejection device according to any one of claims 1 to 3, The gas flow path is further configured such that when the liquid reservoir is attached to the container, the gas flow path enters a communicable state simultaneously with or earlier than the liquid flow path.

20. The liquid ejection device according to any one of claims 1 to 3, The gas flow path is further configured such that when the liquid reservoir is attached to the container, the gas flow path enters the connectable state later than the liquid flow path.

21. The liquid ejection device according to any one of claims 1 to 3, The gas flow path is further configured such that when the liquid reservoir is removed from the container, the gas flow path enters a non-connected state simultaneously with or later than the liquid flow path.

22. The liquid ejection device according to any one of claims 1 to 3, The gas flow path is further configured such that when the liquid reservoir is removed from the container, the gas flow path enters a non-connectable state earlier than the liquid flow path.

23. The liquid ejection device according to any one of claims 1 to 3, The connecting portion includes: Semi-permeable membrane; and A maze structure is disposed between the internal space of the container and the semi-permeable membrane.

24. A liquid storage device, comprising: The first reservoir valve is provided at the liquid flow path when the liquid reservoir is detachably attached to the container of the liquid dispensing device. and In the attached state, the second reservoir valve is positioned at the gas flow path, and the liquid flow path and the gas flow path are configured to communicate the internal space of the container with the internal space of the liquid reservoir in the attached state. The first reservoir valve and the second reservoir valve are configured such that: In response to the transition from a disconnected state (where the liquid reservoir is not attached to the container) to an attached state, the first reservoir valve and the second reservoir valve change from a closed state to an open state; and In response to the transition from the attached state to the disconnected state, the first reservoir valve and the second reservoir valve change from the open state to the closed state. In the attached state, when the container liquid-filled area in the internal space of the container is connected to the reservoir liquid-filled area in the internal space of the liquid reservoir via the liquid flow path, the reservoir gas-filled area in the internal space of the liquid reservoir is connected to the container gas-filled area in the internal space of the container via the gas flow path, and the container gas-filled area is connected to the atmosphere via the connecting portion of the container, wherein no liquid-filled area is located between the reservoir gas-filled area and the atmosphere. The gas filling area of ​​the container is in direct contact with the liquid filling area of ​​the container, and the gas filling area of ​​the reservoir is in direct contact with the liquid filling area of ​​the reservoir.

25. The liquid reservoir of claim 24, further comprising an identification chip.

Images