EP2517885A1 - Flüssigkeitskartusche für eine Bilderzeugungsvorrichtung - Google Patents

Flüssigkeitskartusche für eine Bilderzeugungsvorrichtung Download PDF

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Publication number
EP2517885A1
EP2517885A1 EP11164283A EP11164283A EP2517885A1 EP 2517885 A1 EP2517885 A1 EP 2517885A1 EP 11164283 A EP11164283 A EP 11164283A EP 11164283 A EP11164283 A EP 11164283A EP 2517885 A1 EP2517885 A1 EP 2517885A1
Authority
EP
European Patent Office
Prior art keywords
liquid
ink
unit
controller
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11164283A
Other languages
English (en)
French (fr)
Inventor
Noritsugu Ito
Mikio Hirano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to EP11164283A priority Critical patent/EP2517885A1/de
Publication of EP2517885A1 publication Critical patent/EP2517885A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17513—Inner structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/1752—Mounting within the printer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/1752—Mounting within the printer
    • B41J2/17523—Ink connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17596—Ink pumps, ink valves

Definitions

  • the present invention relates to a liquid cartridge and an image forming device for forming images using liquid supplied from the liquid cartridge.
  • Image forming devices that form images using liquid supplied from liquid cartridges are well known in the art.
  • An example of this type of image forming device disclosed in Japanese Patent Application Publication No. 2005-238815 is an inkjet recording device employing ink cartridges as the liquid cartridges.
  • the ink cartridge houses an ink bag.
  • a valve is provided on the ink bag for supplying ink externally from the ink bag.
  • the valve includes a spring, a spring seat, and a sealing lid.
  • An ink supplying needle (ink delivery tube) provided in the inkjet recording device penetrates the sealing lid and moves the spring seat, allowing ink in the ink bag to pass through the ink supplying needle and be supplied to the inkjet recording device.
  • the present invention provides a liquid cartridge detachably mountable on a body of an image forming device and capable of supplying liquid to the image forming device when mounted on the body.
  • the liquid cartridge includes a liquid accommodating unit, a liquid delivery path, a first opening/closing unit, a second opening/closing unit, an interlocking mechanism, and a storing unit.
  • the liquid accommodating unit is configured to accommodate liquid therein.
  • the liquid delivery path is in fluid communication with the liquid accommodating unit and supplies liquid externally from the liquid accommodating unit.
  • the liquid delivery path has a first portion and a second portion positioned between the liquid accommodating unit and the first portion.
  • the first opening/closing unit is configured so as to be capable of being switched between an open state in which the first portion is opened and a closed state in which the first portion is closed.
  • the second opening/closing unit is configured so as to be capable of being switched between an open state in which the second portion is opened and a closed state in which the second portion is closed.
  • the interlocking mechanism is configured so as to be capable of being operated in association with an operation of an actuator provided on the body to switch the second opening/closing unit between the open state and the closed state.
  • the storing unit is configured to store time length data indicating a length of a prescribed time.
  • the present invention provides an image forming device including a body and a liquid cartridge detachably mounted on the body for supplying liquid to the body.
  • the body includes an actuator, a liquid ejecting head, and a controller.
  • the liquid ejecting head ejects the liquid supplied from the liquid cartridge.
  • the controller controls the actuator and the liquid ejecting head.
  • the liquid cartridge includes a liquid accommodating unit, a liquid delivery path, a first opening/closing unit, a second opening/closing unit, an interlocking mechanism, and a storing unit.
  • the liquid accommodating unit is configured to accommodate the liquid therein.
  • the liquid delivery path is in fluid communication with the liquid accommodating unit and supplies the liquid to the body from the liquid accommodating unit.
  • the liquid delivery path has a first portion and a second portion positioned between the liquid accommodating unit and the first portion.
  • the first opening/closing unit is configured so as to be capable of being switched between an open state in which the first portion is opened and a closed state in which the first portion is closed.
  • the second opening/closing unit is configured so as to be capable of being switched between an open state in which the second portion is opened and a closed state in which the second portion is closed.
  • the interlocking mechanism that that is configured so as to be capable of being operated in association with an operation of the actuator to switch the second opening/closing unit between the open state and the closed state.
  • the storing unit that is configured to store time length data indicating a length of a prescribed time. The controller reads the time length data from the storing unit and controls the actuator to switch the second opening/closing unit from the closed state to the open state when the prescribed time has elapsed after the liquid cartridge is mounted on the body.
  • the present invention provides an image forming device including a body and a liquid cartridge detachably mounted on the body for supplying liquid to the body.
  • the body includes an actuator, a liquid ejecting head, and a first controller.
  • the liquid ejecting head ejects the liquid supplied from the liquid cartridge.
  • the first controller controls the actuator and the liquid ejecting head.
  • the liquid cartridge includes a liquid accommodating unit, a liquid delivery path, a first opening/closing unit, a second opening/closing unit, an interlocking mechanism, a storing unit, and a second controller.
  • the liquid accommodating unit is configured to accommodate the liquid therein.
  • the liquid delivery path is in fluid communication with the liquid accommodating unit and supplies the liquid to the body from the liquid accommodating unit.
  • the liquid delivery path has a first portion and a second portion positioned between the liquid accommodating unit and the first portion.
  • the first opening/closing unit is configured so as to be capable of being switched between an open state in which the first portion is opened and a closed state in which the first portion is closed.
  • the second opening/closing unit is configured so as to be capable of being switched between an open state in which the second portion is opened and a closed state in which the second portion is closed.
  • the interlocking mechanism is configured so as to be capable of being operated in association with an operation of the actuator to switch the second opening/closing unit between the open state and the closed state.
  • the storing unit is configured to store time length data indicating a length of a prescribed time.
  • the second controller reads the time length data from the storing unit and transfers a signal to the first controller when the prescribed time has elapsed after the liquid cartridge is mounted on the body.
  • the first controller controls the actuator to switch the second opening/closing unit from the closed state to the open state in response to the signal.
  • Fig. 1 is a perspective view showing the external appearance of an inkjet printer according to a first embodiment of the present invention
  • Fig. 2(a) is a side cross-sectional view showing the internal structure of the inkjet printer in Fig. 1 ;
  • Fig. 2(b) is a schematic diagram showing an ink supplying system of the inkjet printer in Fig. 1 ;
  • Fig. 3 is a perspective view of an ink cartridge according to the first embodiment of the present invention.
  • Fig. 4 is a schematic diagram showing the internal structure of the ink cartridge in Fig. 3 ;
  • Fig. 5(a) is a partial cross-sectional view of the ink cartridge when first and second valves are closed;
  • Fig. 5(b) is a partial cross-sectional view of the ink cartridge when the first and second valves are opened;
  • Fig. 6 is a block diagram showing the electrical structure of the inkjet printer and ink cartridge according to the first embodiment
  • Figs. 7(a) and 7(b) are partial cross-sectional views showing the state how the ink cartridge is mounted in a mounting unit of the printer, wherein Fig. 7(a) shows the state prior to when the ink cartridge is mounted in the mounting unit, and Fig. 7(b) shows the state how the ink cartridge is mounted in the mounting unit;
  • Fig. 8 is a flowchart illustrating steps in a control process performed by controllers in the inkjet printer and the ink cartridge according to the first embodiment when the ink cartridge is mounted in the mounting unit of the printer;
  • Fig. 9 is a block diagram showing the electrical structure of an inkjet printer and an ink cartridge according to a modification to the first embodiment
  • Fig. 10 is a block diagram showing the electrical structure of an inkjet printer and an ink cartridge according to a second embodiment.
  • Fig. 11 is a block diagram showing the electrical structure of an inkjet printer and an ink cartridge according to a modification to the second embodiment.
  • the recording device is an inkjet printer 1 (image forming device).
  • the inkjet printer 1 has a casing 1a formed in the shape of a rectangular parallelepiped.
  • Three openings 10d, 10b, and 10c are formed in order from top to bottom in the front surface of the casing 1a (the surface on the near side in Fig. 1 ).
  • Doors 1d and 1c are disposed in the openings 10d and 10c, respectively, so as to be flush with the front surface of the casing 1a.
  • the doors 1d and 1c can be opened and closed about a horizontal axis passing through their respective lower edges.
  • a paper supply unit 1b is inserted into the opening 10b.
  • a paper discharging unit 11 is provided on the top of the casing 1a.
  • the door 1d is disposed on the same level vertically as a conveying unit 21 described later, facing the conveying unit 21 in a main scanning direction of the inkjet printer 1 (toward the far side in Fig. 1 ).
  • the interior of the casing 1a is partitioned into three spaces A-C in order from top to bottom.
  • the space A Within the space A are disposed four inkjet heads 2 (liquid ejecting head) that eject ink droplets in the respective colors magenta, cyan, yellow, and black; a maintenance unit 30, and the conveying unit 21.
  • the paper supply unit 1b is disposed in the space B, and four ink cartridges 40 (liquid cartridge) are disposed in the space C.
  • the paper supply unit 1b and the four ink cartridges 40 are mounted in and removed from the casing 1a along the main scanning direction (the direction orthogonal to the surface of the paper in Fig. 2(a) ).
  • a sub scanning direction is a direction in which a sheet P is conveyed by the conveying unit 21, while the main scanning direction is a horizontal direction orthogonal to the sub scanning direction.
  • the inkjet printer 1 is further provided with a controller 100 (controller, first controller) that controls the paper supply unit 1b, maintenance unit 30, conveying unit 21, and inkjet heads 2.
  • the four inkjet heads 2 are supported in the casing 1a by means of a frame 3 and are juxtaposed in the sub scanning direction. Each inkjet head 2 is elongated in the main scanning direction.
  • the inkjet printer 1 of the embodiment is a line-type color inkjet printer.
  • An elevating mechanism (not shown) is also provided for moving the frame 3 vertically within the casing 1a.
  • the controller 100 controls the elevating mechanism to move the inkjet heads 2 mounted in the frame 3 between a printing position (the position shown in Fig. 2(a) ) and a retracted position (not shown) higher than the printing position.
  • Each inkjet head 2 has a laminated body formed by bonding a channel unit and a plurality of actuators (both not shown in the drawings) together.
  • the channel unit has a plurality of ink channels and a plurality of pressure chambers formed therein, and the actuators apply pressure to ink in the pressure chambers.
  • the bottom surface of each inkjet head 2 is an ejection surface 2a.
  • a plurality of ejection holes (not shown) for ejecting ink droplets from the plurality of pressure chambers are formed in each ejection surface 2a.
  • the bold arrows in Fig. 2(a) indicate a paper-conveying path formed in the inkjet printer 1 along which sheets P are conveyed from the paper supply unit 1b to the paper discharging unit 11.
  • the paper supply unit 1b includes a paper tray 23 capable of accommodating a plurality of sheets P, and a feeding roller 25 mounted on the paper tray 23.
  • a feeding motor not shown
  • the feeding roller 25 feeds the topmost sheet P accommodated in the paper tray 23.
  • the sheet P fed by the feeding roller 25 is guided along guides 27a and 27b, and a pair of conveying rollers 26 grip and convey the sheet P to the conveying unit 21.
  • the conveying unit 21 includes two belt rollers 6 and 7 and an endless conveying belt 8 looped around both belt rollers 6 and 7 and stretched taut therebetween.
  • the belt roller 7 is a drive roller that is rotated clockwise in Fig. 2(a) when the controller 100 controls a conveying motor (not shown) to apply a drive force to a shaft of the belt roller 7.
  • the belt roller 6 is a follow roller that also rotates clockwise in Fig. 2(a) when the conveying belt 8 is circulated by the rotating belt roller 7.
  • An outer surface 8a of the conveying belt 8 is coated with silicone to give the outer surface 8a tackiness.
  • a nip roller 4 is disposed along the paper-conveying path at a position confronting the belt roller 6 through the conveying belt 8. The nip roller 4 holds the sheet P conveyed from the paper supply unit 1b against the outer surface 8a of the conveying belt 8. Once pressed against the outer surface 8a, the sheet P is conveyed rightward in Fig. 2(a) (in the paper-conveying direction) while being held on the outer surface 8a by the tacky coating.
  • a separating plate 5 is also disposed on the paper-conveying path at a position opposing the belt roller 7 through the conveying belt 8.
  • the separating plate 5 functions to separate the sheet P from the outer surface 8a of the conveying belt 8. Once separated, the sheet P is guided toward pairs of conveying rollers 28 by guides 29a and 29b, and the conveying rollers 28 grip and discharge the sheet P onto the paper discharging unit 11 through an opening 12 formed in the top of the casing 1a.
  • a feeding motor (not shown) controlled by the controller 100 applies a drive force to one of the conveying rollers 28 in each pair.
  • a platen 19 having a substantially rectangular parallelepiped shape is disposed within the loop of the conveying belt 8 at a position opposite the four inkjet heads 2.
  • the top surface of the platen 19 contacts the inner surface of the conveying belt 8 on the upper portion of the loop and supports this upper loop portion from the inner surface of the conveying belt 8. Accordingly, the outer surface 8a on the upper loop portion of the conveying belt 8 is maintained parallel and opposite the ejection surfaces 2a, with a slight gap formed between the ejection surfaces 2a and the outer surface 8a. This gap constitutes part of the paper-conveying path.
  • the inkjet heads 2 are controlled by the controller 100 to eject ink droplets of their respective colors onto the top surface of the sheet P, thereby forming a desired color image on the sheet P.
  • the leftmost ink cartridge 40 shown in Fig. 2(a) stores black ink.
  • the leftmost ink cartridge 40 has a larger dimension in the sub scanning direction than the other three ink cartridges 40 and, hence, a greater ink capacity than the other three ink cartridges 40.
  • the remaining three ink cartridges 40 possess an identical ink capacity and store ink in the colors magenta, cyan, and yellow, respectively.
  • the operator opens the door 1c c on the casing 1a, removes the ink cartridge 40 from the printer body, and mounts a new ink cartridge 40 in the printer body.
  • the ink cartridges 40 are mounted individually in the printer body in the embodiment, the four ink cartridges 40 may instead be placed in a single cartridge tray to form an ink unit, and the entire ink unit can be mounted in the printer body.
  • ink supplying systems provided in the inkjet printer 1.
  • Four ink supplying systems are provided for the four inkjet print heads 2, respectively.
  • the ink supplying systems have the same configurations with one another.
  • One of the ink supplying systems will be described below while referring to Fig. 2(b) , but the following description is in common to the other ink supplying systems.
  • one inkjet head 2 is connected via a flexible tube 102 (ink supplying path) to one ink supply channel 154 described later (see Fig. 9(a) ).
  • the ink channels formed in the inkjet head 2 are in fluid communication with the flexible tube 102.
  • a pump 104 is provided in the midway portion of the tube 102 connecting the inkjet head 2 and the ink supply channel 154.
  • the maintenance unit 30 is provided between the four inkjet heads 2 and the conveying unit 21.
  • the maintenance unit 30 functions to resolve ejection failures in the inkjet heads 2.
  • the maintenance unit 30 includes four plate-shaped members 32 disposed at equal intervals along the sub scanning direction, and four caps 31 fixed to respective plate-shaped members 32 and being capable of covering the ejection surfaces 2a of the respective inkjet heads 2.
  • a pump (not shown) in communication with the caps 31 is driven to draw ink from the ejection surfaces 2a of the inkjet heads 2.
  • each ink cartridge 40 includes a case 41 having a substantially parallelepiped shape.
  • an ink bag 42 liquid accommodating unit
  • an ink delivery tube 43 in communication with the ink bag 42 on one end
  • a photosensor 69 detecting unit
  • a storage unit 125 a storage unit 125
  • a controller 90 second controller connected to the photosensor 69 and storage unit 125.
  • the ink bag 42 has a projecting part 42a that projects leftward in the lower left region of Fig. 4 .
  • One end of the ink delivery tube 43 is connected to this projecting part 42a.
  • the ink cartridge 40 for accommodating black ink is larger in size and has greater ink storage capacity than the other three ink cartridges 40, but this difference is simply reflected in the chamber 41a and ink bag 42 being larger in the sub scanning direction. Since the four ink cartridges 40 have essentially the same structure, the following description of the ink cartridge 40 will pertain to all ink cartridges 40.
  • the ink delivery tube 43 includes a tube 65 connected to the ink bag 42, a tube 44 connected to the tube 65, and a tube 45 fitted into an end (left end in Fig. 4 ) of the tube 44.
  • an ink channel 66a (second portion) is formed inside the tube 65, extending in the sub scanning direction.
  • the tube 65 is configured of a small diameter section 65a, and a large diameter section 65b having a larger inner diameter than that of the small diameter section 65a.
  • a cap 67 is provided on one end of the tube 65 with respect to the sub scanning direction (the top end in Fig. 5 ).
  • An ink channel 66b (first portion) is formed in the tubes 44 and 45, extending in the main scanning direction.
  • the end of the tube 44 opposite the tube 45 (right end in Fig. 5 ) is connected to the large diameter section 65b of the tube 65 so that the ink channel 66b is in communication with the ink channel 66a.
  • the ink channels 66a and 66b constitute a channel 66 (liquid delivery path) formed in the ink delivery tube 43.
  • both the tubes 44 and 45 are constructed of a transparent resin material.
  • annular flange 47 is formed on one end of the tube 44.
  • the annular flange 47 is formed with a circular cylinder part 47A surrounding the outer periphery of the annular flange 47.
  • the annular flange 47 is further formed with an annular protrusion 48.
  • An O-ring 48a is provided around the outer periphery of the annular protrusion 48 and seals the gap between the case 41 and the annular protrusion 48, as shown in Fig. 4 .
  • the annular flange 47 of this embodiment constitutes part of the case 41.
  • a contact point 91 is formed on the outer surface of the annular flange 47.
  • the contact point 91 is juxtaposed with the ink outlet 46a along the sub scanning direction.
  • the contact point 91 is connected to the controller 90.
  • the contact point 91 can be disposed at any position, provided that the contact point 91 is not positioned vertically below the ink outlet 46a. Disposing the contact point 91 of the signal transmission system at a position that is not directly beneath the ink outlet 46a can prevent ink from dripping out of the ink outlet 46a onto the contact point 91.
  • a power input unit 92 is disposed on a side surface of the case 41 on the ink outlet 46a side.
  • a stepped surface 41 c is formed on the case 41 so that the case 41 is recessed from the annular flange 47 toward the ink bag 42 in the main scanning direction between the ink outlet 46a and the power input unit 92.
  • the power input unit 92 is provided on the stepped surface 41c and is positioned on the opposite side of the ink outlet 46a with respect to the contact point 91 in the sub scanning direction. In other words, the power input unit 92 is separated farther from the ink outlet 46a in the sub scanning direction than is the contact point 91. As shown in Fig.
  • the power input unit 92 is electrically connected to the controller 90 and the photosensor 69. Through an electrical connection with a power output part 162 in the recording device 1 side described later, the power input unit 92 supplies electricity to the controller 90 and the photosensor 69. As a variation of the embodiment, the power input unit 92 may be disposed at any position, provided that the position is not directly beneath the ink outlet 46a.
  • Disposing the power input unit 92 of the power transmission system at a position not directly beneath the ink outlet 46a in this way prevents ink dripping out of the ink outlet 46a from depositing on the power input unit 92. Further, by separating the power input unit 92 from the ink outlet 46a even farther than the contact point 91, it is even less likely that ink will become deposited on the power input unit 92, thereby ensuring that the power input unit 92 does not short-circuit and damage the controller 90 or the like.
  • the power input unit 92 and ink outlet 46a are separated considerably in the main scanning direction as well as the sub scanning direction, thereby further ensuring that ink does not become deposited on the power input unit 92.
  • a first valve 50 (first opening/closing unit) is disposed inside the tube 45 of the ink delivery tube 43.
  • a second valve 60 (second opening/closing unit) is disposed inside the tube 44 of the ink delivery tube 43.
  • the first valve 50 includes a flexible sealing member 51 for sealing the opening formed in the left end of the tube 45, a spherical member 52, and a coil spring 53.
  • a cover 46 is provided over one end of the tube 45. The cover 46 prevents the sealing member 51 from coming out of the tube 45.
  • An ink outlet 46a is formed in the cover 46.
  • the coil spring 53 contacts the spherical member 52, and the other end contacts a stepped part 45a formed on the inner end of the tube 45 for constantly urging the spherical member 52 toward the sealing member 51.
  • the coil spring 53 is used as an urging member, but the urging member may be implemented by means other than a coil spring, provided that the spherical member 52 is urged toward the sealing member 51.
  • the sealing member 51 is configured of an elastic member formed of rubber or the like.
  • the sealing member 51 has a slit 51 a penetrating the center of the sealing member 51 in the main scanning direction, an annular protrusion 51b that can be fitted into the end of the tube 45, and a curved part 51 constituting the surface of the sealing member 51 opposing the spherical member 52 in the region surrounded by the annular protrusion 51b.
  • the curved part 51c has a shape that conforms to the outer surface of the spherical member 52.
  • the cross-sectional diameter of the slit 51a is slightly smaller than the diameter of a hollow needle 153 described later.
  • the sealing member 51 elastically deforms so that the inner surface of the slit 51a is in close contact with the outer surface of the hollow needle 153, preventing ink from leaking between the slit 51a and the hollow needle 153.
  • the inner diameter of the annular protrusion 51b is slightly smaller than the diameter of the spherical member 52, and the slit 51a is sealed when the spherical member 52 contacts the inner surface of the annular protrusion 51b. More specifically, the slit 51a is sealed through contact between the spherical member 52 and curved part 51c. Further, the slit 51a formed in the sealing member 51 facilitates insertion of the hollow needle 153 into the sealing member 51. Further, because the slit 51a is formed in the sealing member 51, although the hollow needle 153 scrapes against the sealing member 51 when being inserted therein, shaving matter from the sealing member 51 is restricted from being generated and entering the hollow needle 153. Therefore, the shaving matter from the sealing member 51 can be prevented from entering the ink channel of the inkjet head 2.
  • the hollow needle 153 when the hollow needle 153 is inserted through the ink outlet 46a into the slit 51a, the distal end of the hollow needle 153 contacts the spherical member 52 and pushes the spherical member 52 away from the curved part 51 c and annular protrusion 51b, as shown in Fig. 7(b) .
  • the first valve 50 switches from a closed state to an open state.
  • a hole 153b formed in the hollow needle 153 described later has passed through the slit 51a when the first valve 50 is in the open state. So, the hollow needle 153 is in communication with the ink channel 43a.
  • the first valve 50 takes on either the open state for allowing communication within the ink delivery tube 43 or the closed state for interrupting communication within the ink delivery tube 43 based on insertion or retraction of the hollow needle 153. Further, since the first valve 50 is provided with the coil spring 53 for urging the spherical member 52 toward the sealing member 51, the first valve 50 can suppress ink from leaking out of the first valve 50 through a simple construction.
  • the second valve 60 is disposed in the large diameter section 65b, and includes a valve member 61 having a cylindrical shape, and two O-rings 62 and 63 for sealing the gap between the valve member 61 and the inner surface of the large diameter section 65b.
  • the valve member 61 has a ring-shaped groove 61a formed in a surface of the valve member 61 facing the small diameter section 65a (the lower surface of the valve member 61 in Fig. 5(a) ), and a ring-shaped groove 61b formed in the side surface of the valve member 61 adjacent to the second end of the tube 44 (an upper portion of the side surface of the valve member 61 in Fig. 5(a) ), with the o-rings 62 and 63 being disposed in the ring-shaped grooves 61a and 61b, respectively.
  • the ring-shaped groove 61a and the O-ring 62 are positioned at the bottom surface of the valve member 61, surrounding part of the valve member 61 facing the path formed in the small diameter section 65a.
  • the second valve 60 is in an open state, in which the valve member 61 allows ink in the ink channel 66a to flow to the ink channel 66b via the second valve 60. That is, when the second valve 60 is in the open state, the ink channel 66a and ink channel 66b are in fluid communication.
  • valve member 61 regardless of whether valve member 61 is in the close position or the open position, the ring-shaped groove 61b and O-ring 63 are positioned closer to the cap 67 than the connection portion of the ink channel 66a and ink channel 66b. Accordingly, the connection portion of the ink channel 66a and ink channel 66b, and a space formed in the large diameter section 65b on the cap 67 side of the valve member 61, are not in fluid communication due to the contact between the O-ring 63 and the inner surface of the large diameter section 65b.
  • an opening/closing mechanism 80 (interlocking mechanism) is provided in the case 41.
  • the opening/closing mechanism 80 operates in association with operations of an actuator 70 described later (see Fig. 6 ) to open and close the second valve 60.
  • the opening/closing mechanism 80 has a rod-shaped member 81 (moving member) extending in the subs canning direction, and a coil spring 82.
  • One end of the rod-shaped member 81 with respect to the sub scanning direction is fixed to the valve member 61, while the other end protrudes out of the large diameter section 65b through a opening 67a formed in the cap 67.
  • the protruding end of the rod-shaped member 81 remains exposed on the outside of the large diameter section 65b, even when the valve member 61 is positioned at the closed position to block the channel 66.
  • a roller 83 is disposed on the protruding end of the rod-shaped member 81 and is rotatably supported thereon.
  • the coil spring 82 is provided inside the large diameter section 65b. One end of the coil spring 82 contacts the valve member 61, while the other end contacts the cap 67. The coil spring 82 constantly urges the valve member 61 toward the small diameter section 65a.
  • coil spring 82 is employed as an urging member in this embodiment, an urging member other than a coil spring may be used, provided that the member urges the valve member 61 toward the small diameter section 65a.
  • An opening 41 a is formed in the side of the case 41 nearest the ink outlet 46a at a position opposing the protruding end of the rod-shaped member 81 in the main scanning direction.
  • the photosensor 69 is a reflective-type optical sensor.
  • the photosensor 69 is disposed in a position not opposing the roller 83 when the second valve 60 blocks communication within the ink channel 66a, as shown in Fig. 5(a) , and opposing the roller 83 when the second valve 60 does not block communication with the ink channel 66a.
  • the photosensor 69 has a light-emitting element and a light-receiving element and outputs signals to the controller 90 based on whether the light-receiving element is receiving light. Specifically, the photosensor 69 outputs a signal A when the light-receiving element receives light and a signal B, different from the signal A, when the light-receiving element does not receive light.
  • the photosensor 69 when the photosensor 69 does not confront the roller 83, the photosensor 69 outputs the signal B to the controller 90 because the light outputted from the light-emitting element is not reflected off the roller 83 and, thus, not received by the light-receiving element. Based on this signal B, the controller 90 can determine that the second valve 60 is in the closed state.
  • the photosensor 69 when the photosensor 69 opposes the roller 83, the photosensor 69 outputs the signal A to the controller 90 because the light outputted from the light-emitting element is reflected off the roller 83 and received by the light-receiving element. Based on the signal A, the controller 90 can determine that the second valve 60 is in the open state.
  • the signal A outputted by the photosensor 69 corresponds to the open state of the second valve 60
  • the signal B corresponds to the closed state of the second valve 60.
  • the controller 90 can determine whether the second valve 60 is blocking the ink channel 66a or not and can output the corresponding detection signal.
  • the photosensor 69 can detect mechanical displacement of the roller 83 included in the opening/closing mechanism 80, the inkjet printer 1 can more reliably detect the open and closed state of the second valve 60.
  • the storage unit 125 is provided on a plate-shaped member 49.
  • the plate-shaped member 49 is fixed to the cylindrical body 48 on the side opposite the annular flange 47.
  • the storage unit 125 stores data specifying a predetermined wait time, and a serial code indicating the type of the ink cartridge 40.
  • the wait time is the time required for fluctuations in ink pressure within the ink bag 42 to subside when the ink cartridge 40 is mounted in a mounting unit 150 described later.
  • the ink cartridge 40 Since the ink cartridge 40 is moved when the user mounts the ink cartridge 40 in the mounting unit 150, this movement can produce a change in ink pressure within the ink bag 42. If the pressure change is transferred to the inkjet head 2 via the ink supply channel 154, there is a possibility that the meniscuses formed on ejection holes formed in the inkjet head 2 will break.
  • the inkjet printer 1 changes the second valve 60 from the closed state to the open state to open the ink supply channel 154 linking the ink bag 42 in the ink cartridge 40 to the inkjet head 2 a prescribed time after the ink cartridge 40 is mounted in the mounting unit 150. Therefore, ink in the ink bag 42 is not supplied to the inkjet head 2 until the change in ink pressure during mounting has abated, thereby reducing the possibility that meniscuses in the ejection holes will break.
  • this prescribed time is too short, the ink in the ink bag 42 will be supplied to the inkjet head 2 before the ink pressure change has abated, adversely affecting the meniscuses.
  • setting the prescribed time too long is also not preferable because the user must wait a longer time before being able to print. Therefore, in this embodiment a recommended value for this prescribed time is calculated by imagining the maximum pressure change that could occur when a user mounts the ink cartridge 40 in the mounting unit 150 and the time required for this fluctuation in ink pressure to abate to a level that will not break the meniscuses. The time is stored in the storage unit 125 as the recommended value for the prescribed time.
  • the wait time is preferably set longer for larger ink quantities.
  • the storage unit 125 of the ink cartridge 40 storing black ink stores data indicating a second prescribed time, which is longer than the first prescribed time.
  • the storage unit 125 is configured of flash memory that can be overwritten by the controller 90, the controller 100 in the inkjet printer 1, or another external device.
  • the storage unit 125 stores data indicating the quantity of ink in the ink cartridge 40. Accordingly, while the ink cartridge 40 is mounted in the inkjet printer 1, the controller 100 can overwrite the data stored in the storage unit 125 to reflect the ink quantity remaining in each ink cartridge 40 after performing printing and purging operations. This residual ink quantity is found by subtracting the quantity of ink consumed during the printing or purging operation from the ink quantity value currently stored in the storage unit 125.
  • the recommended value for the prescribed time (first and second prescribed times) is determined based on an initial ink quantity of the new ink cartridge 40 and does not change even if the ink quantity remaining in the ink cartridge 40 is changed.
  • an external device other than the inkjet printer 1 can easily be used to overwrite data indicating the quantity of ink in the ink cartridge 40. Therefore, if an ink cartridge 40 that has run out of ink is refilled with a quantity of ink different from the initial ink quantity, an external device can be used to overwrite data in the storage unit 125 indicating the ink quantity in order to reflect this change in specification.
  • an external device can be used to overwrite data in the storage unit 125 indicating the ink quantity in order to reflect this change in specification.
  • mounting units 150 formed in the body of the inkjet printer 1 will be described with reference to Figs. 6 and 7 .
  • Four of the mounting units 150 juxtaposed in the sub scanning direction are provided in the printer body for receiving the respective ink cartridges 40 when mounting the ink cartridges 40 in the printer body. Since the mounting units 150 have substantially the same structure, only one of the mounting units 150 will be described below.
  • the mounting unit 150 has a recessed part 151 that conforms to the outer shape of the ink cartridge 40.
  • the recessed part 151 has the most inward part 151a in the main scanning direction.
  • On the most inward part 151 a there are provided the hollow needle 153 (hollow tube), the ink supply channel 154, a contact point 161 electrically connected to the controller 100, the power output part 162 for outputting electricity produced by a power supply unit 200 (see Fig. 6 ) provided in the printer body, and the actuator 70.
  • the actuator 70 has a rod-shaped member 71 extending in the main scanning direction at a position confronting the opening 41a formed in the case 41 of the ink cartridge 40 in the main scanning direction.
  • the rod-shaped member 71 actuates the opening/closing mechanism 80 to toggle the second valve 60 between open and closed states.
  • the actuator 70 is provided in a location outside of the ink cartridge 40 in this embodiment.
  • the actuator 70 moves the rod-shaped member 71 in the main scanning direction based on control signals from the controller 100 in the body of the inkjet printer 1.
  • a tapered portion 71a is formed on the distal end of the rod-shaped member 71 so as to taper toward the end.
  • the rod-shaped member 71 actuates the opening/closing mechanism 80 to switch the second valve 60 to its open state.
  • the hollow needle 153 is fixedly disposed at a position opposite the slit 51a of the mounted ink cartridge 40 and is longitudinally oriented in the main scanning direction.
  • the hollow needle 153 has an inner hollow region 153a in fluid communication with the ink supply channel 154, and a hole 153b formed near the distal end thereof for providing external communication with the hollow region 153a (see also Fig. 7(b) ).
  • the hollow needle 153 is in a state of communication with the tube 45 side of the ink channel 66b when the ink cartridge 40 is mounted in the printer body and the hole 153b has passed through the slit 51a.
  • the contact point 161 is juxtaposed with the hollow needle 153 in the sub scanning direction and positioned opposite the contact point 91 of the mounted ink cartridge 40.
  • the contact point 161 is configured of a rod-shaped member that extends in the main scanning direction and is slidably supported in a hole 151c that is formed in the most inward part 151a and that is elongated in the main scanning direction.
  • a spring 151d is provided in the hole 151c and urges the contact point 161 outward from the hole 151c so that the contact point 161 makes an electrical connection with the contact point 91 just prior to the hollow needle 153 being inserted into the sealing member 51 when the ink cartridge 40 is mounted in the printer body.
  • the contact point 161 is electrically connected to the contact point 91 before the first valve 50 changes to an open state. Conversely, when removing the ink cartridge 40 from the body of the inkjet printer 1, the contact point 161 remains electrically connected to the contact point 91 until the ink cartridge 40 is initially pulled outward from the body. The electrical connection between the contact point 161 and contact point 91 establishes a signal transmission path between the controller 100 and controller 90.
  • the power output part 162 is provided in a stepped surface 151b formed on the most inward part 151a.
  • the power output part 162 is disposed at a position opposing the power input unit 92 of the mounted ink cartridge 40.
  • the power output part 162 also has a contact point 163 that protrudes outward in the main scanning direction.
  • the contact point 163 is inserted into the power input unit 92 and forms an electrical connection with the same.
  • the contact point 163 becomes electrically connected to the power input unit 92 just before the hollow needle 153 enters the sealing member 51.
  • a reflective-type photosensor 170 (detecting unit) is provided on each mounting unit 150 near the opening to the corresponding recessed part 151.
  • the photosensor 170 is connected to the controller 100 and serves to detect the presence of a protrusion 41d formed on the outer surface of the case 41 constituting the ink cartridge 40.
  • the photosensor 170 includes a light-emitting element and a light-receiving element, and outputs signals to the controller 100 based on whether the light-receiving element receives light. Specifically, the photosensor 170 outputs a signal C when the light-receiving element is receiving light and outputs a signal D, different from the signal C, when the light-receiving element is not receiving light.
  • the photosensor 170 opposes the protrusion 41d when the ink cartridge 40 is completely mounted in the mounting unit 150 (the first valve 50 changes to the open state at the same time mounting is completed). Since the light outputted from the light-emitting element at this time is reflected off the protrusion 41d and received by the light receiving element, the photosensor 170 outputs the signal C to the controller 100. In this way, the controller 100 can detect when mounting of the ink cartridge 40 in the mounting unit 150 is complete (when the first valve 50 has switched from the closed state to the open state).
  • the photosensor 170 When the ink cartridge 40 is removed from the mounting unit 150, as shown in Fig. 7(a) , the photosensor 170 is not positioned opposite the protrusion 41d and, hence, light outputted from the light-emitting element is not reflected off the protrusion 41 d and not received by the light-receiving element. Accordingly, the photosensor 170 outputs the signal D to the controller 100, whereby the controller 100 can detect that the ink cartridge 40 is not mounted in the mounting unit 150 (that the first valve 50 is in the closed state).
  • the photosensor 170 outputs the signal C to indicate that the ink cartridge 40 is mounted in the mounting unit 150 (the first valve 50 is in the open state) and outputs the signal D to indicate that the ink cartridge 40 is not mounted in the mounting unit 150 (that the first valve 50 is in the closed state).
  • the controller 100 can distinguish when the ink cartridge 40 is mounted in and not mounted in the first valve 50 and can detect the open and closed state of the first valve 50. Through this simple construction, it is possible to detect the open and closed state of the first valve 50 without directly detecting the operation of the first valve 50 itself.
  • a buzzer 13 is also provided inside the casing 1a.
  • the controller 100 controls the buzzer 13 to emit various sounds intended to notify the user when, for example, an error has occurred in one of the second valve 60 and photosensor 69, an ink cartridge 40 is not properly mounted in its mounting unit 150, and the inkjet printer 1 is ready to print.
  • FIG. 8 The process described in Fig. 8 begins when the user mounts an ink cartridge 40 into the body of the inkjet printer 1 by opening the door 1c on the printer body and gradually inserting the ink cartridge 40 into the mounting unit 150.
  • the hollow needle 153 is gradually inserted into the slit 51a formed in the sealing member 51, and electrical connections are established between the contact point 91 and contact point 161 and between the contact point 163 of the power output part 162 and the power input unit 92.
  • the controller 90 and controller 100 are electrically connected to each other and are capable of exchanging signals.
  • power is supplied to the controller 90, actuator 70, storage unit 125, and photosensor 69.
  • the photosensor 170 When the ink cartridge 40 is mounted in the mounting unit 150, the photosensor 170 is positioned opposite the protrusion 41d, as shown in Fig. 7(b) , and outputs the signal C to the controller 100.
  • the controller 100 detects that the ink cartridge 40 has been mounted in the mounting unit 150 upon receiving the signal C from the photosensor 170.
  • the hollow needle 153 inserted through the slit 51a separates the spherical member 52 from the annular protrusion 51b, moving the first valve 50 from the closed state to the open state.
  • the controller 100 outputs a signal to the controller 90 indicating the time that the photosensor 170 detected completion of the mounting operation.
  • the controller 90 Upon receiving the signal from the controller 100 indicating that the ink cartridge 40 was mounted, in S2 the controller 90 reads data from the storage unit 125 indicating the current ink quantity in the ink cartridge 40 and the wait time (prescribed time). In S3 the controller 90 determines whether data was read from the storage unit 125 in S2. If the controller 90 was unable to read the above data because the data is not stored in the storage unit 125 (S3: NO), then in S4 the controller 90 outputs a first error signal to the controller 100 and, upon receiving this error signal, the controller 100 controls the buzzer 13 to emit a sound for notifying the user that data is not stored in the storage unit 125.
  • the controller 90 determines in S3 that data was successfully read from the storage unit 125 (S3: YES)
  • the controller 90 determines whether the prescribed time has elapsed after mounting was detected. The controller 90 continues to wait while the prescribed time has not elapsed (S5: NO).
  • the controller 90 outputs a signal to the controller 100 instructing the controller 100 to operate the actuator 70 and, upon receiving this signal, the controller 100 initiates a control operation to operate the actuator 70.
  • the actuator 70 moves the rod-shaped member 71 so as to extend the rod-shaped member 71 further into the first valve 50 in the main scanning direction, as shown in Fig. 5(b) .
  • the controller 90 waits till a default time has elapsed after mounting was detected. Date indicating the default time is stored in the storage unit in the printer body. The default time is an enough time required for the fluctuation in ink pressure to abate to a level that will not break the meniscuses and is longer than the prescribed time. After the default time has elapsed, the controller 90 advances to S6.
  • the tip of the rod-shaped member 71 passes through the opening 41a formed in the case 41 and is inserted between the roller 83 and the cap 67.
  • the roller 83 is forced upward in Fig. 5 along the tapered portion 71a. Consequently, the valve member 61 also moves upward in Fig. 5 along with the roller 83, shifting from the position blocking the channel 66 to a position retracted from the channel 66.
  • the second valve 60 is shifted from the closed state to the open state, allowing ink in the ink bag 42 to flow through the ink delivery tube 43 into the hollow needle 153. Accordingly, ink can be supplied from the ink cartridge 40 to the inkjet head 2.
  • the roller 83 is positioned opposite the photosensor 69, causing the photosensor 69 to output the signal A to the controller 90 indicating the open state of the second valve 60.
  • the controller 90 determines whether the operation of the actuator 70 is completed and continues to wait while the operation of the actuator 70 is not completed (S7: NO).
  • the controller 90 determines whether the operation of the actuator 70 has completed by determining whether an operating time stored in the storage unit 125 or in a storage unit (not shown) in the printer body has elapsed since the operation of the actuator 70 was started.
  • the controller 90 determines whether the second valve 60 has shifted from the closed state to the open state. Specifically, the controller 90 determines the state of the second valve 60 based on the signal outputted from the photosensor 69 (signal A indicating the open state and signal B indicating the closed state).
  • the controller 90 If the controller 90 has received the signal B from the photosensor 69, indicating that the second valve 60 is still in the closed state (S8: NO), in S9 the controller 90 outputs a second error signal to the controller 100 and, upon receiving this second error signal, the controller 100 controls the buzzer 13 to emit a sound for notifying the user that an error has occurred with one of the second valve 60, photosensor 69, and the actuator 70. After the buzzer 13 emits the sound in S9, the controller 100 ends the process in Fig. 8 .
  • the user Based on the sound of the buzzer 13, the user replaces the present ink cartridge 40 with a new ink cartridge 40 if the error has occurred on the second valve 60 and the photosensor 69 and the user repairs the printer body of the inkjet printer 1 if the error has occurred on the actuator 70.
  • the controller 90 determines that the ink cartridge 40 was properly mounted in the mounting unit 150 and in S10 enters a standby state, i.e., a print-ready state. In S11 the controller 90 outputs a signal to the controller 100 indicating this print-ready state and, upon receiving this signal, the controller 100 controls the buzzer 13 to emit a sound indicating that the inkjet printer 1 is ready to print. At this point, the operation for mounting the ink cartridge 40 is complete.
  • the controller 100 recognizes that the first valve 50 is in the closed state and that the ink cartridge 40 is being removed from the printer body.
  • the controller 100 outputs a control signal to the controller 90 for operating the actuator 70. Upon receiving this control signal, the controller 90 controls the actuator 70 to retract the rod-shaped member 71.
  • the second valve 60 changes from the open state to the closed state, blocking the ink channel in the ink delivery tube 43.
  • the roller 83 does not oppose the photosensor 69 in the main scanning direction and, hence, the photosensor 69 outputs the signal B to the controller 90. Consequently, the controller 90 outputs a signal to the controller 100 indicating the closed state of the second valve 60.
  • the controller 90 continues to output the signal to the controller 100 indicating the closed state of the second valve 60 until the contact point 91 and contact point 161 have separated from each other (i.e., until the hole 153b has passed through the center of the slit 51a).
  • the hollow needle 153 is withdrawn from the slit 51a of the sealing member 51, and both the contact point 91 and contact point 161 and the power input unit 92 and contact point 163 are disconnected. Thereafter, the user replaces the ink cartridge 40 that was removed from the printer body with a new ink cartridge 40, mounting the new ink cartridge 40 in the printer body according to the procedure described above.
  • the photosensor 69 When the inkjet heads 2 are ejecting ink on a sheet P in a printing operation, for example, and one of the actuators 70 is operated through control of the controller 100 to move the corresponding second valve 60 from the open state to the closed state due to a malfunction of the actuator 70, a problem with power supply, or the like, the photosensor 69 outputs the signal A to the controller 90. Upon receiving this signal, the controller 90 outputs a signal to the controller 100 indicating the closed state of the second valve 60. Upon receiving this signal, the controller 100 controls the inkjet heads 2 to halt ink ejection, and controls the feeding roller 25, conveying rollers 26, conveying unit 21, and conveying rollers 28 to discharge the sheet P currently being printed onto the paper discharging unit 11.
  • the controller 100 halts ink ejection from the inkjet heads 2 when the second valves 60 are placed in the closed state for any reason. This can prevent a large negative pressure from being produced in the ink channels leading from the second valves 60 to the inkjet heads 2 caused by continuing to eject ink from the inkjet heads 2. Avoiding the generation of negative pressure prevents breakage of the meniscuses formed near the ejection openings in the inkjet heads 2 and prevents air from entering these openings.
  • the second valve 60 of the ink cartridge 40 is shifted to the open state the prescribed time (first and second prescribed times) after the ink cartridge 40 is mounted in the corresponding mounting unit 150.
  • a time difference equivalent to the prescribed time is produced after the ink cartridge 40 is mounted in the mounting unit 150 and until the ink channel connecting the ink bag 42 of the ink cartridge 40 to the inkjet head 2 is formed.
  • the storage unit 125 stores data indicating prescribed times that are longer when the initial quantity of ink in the ink cartridge 40 is greater. Therefore, the present embodiment ensures that ink in the ink cartridge 40 is not supplied to the inkjet head 2 until changes in ink pressure have subsided, even when mounting an ink cartridge containing a large quantity of ink (a cartridge storing black ink). Hence, the inkjet printer 1 according to this embodiment can better suppress breakage of ink meniscuses formed in the ejection openings of the inkjet heads 2.
  • the second valve 60 is placed in the closed state when the ink cartridge 40 is removed from the body of the inkjet printer 1. Since the second valve 60 blocks communication in the ink channel 43a, the second valve 60 can suppress the quantity of ink leakage if the first valve 50 becomes damaged when shifted to the closed state.
  • a sensor 270 may be provided in the ink cartridge in place of the photosensor 170 provided in the body of the printer for producing a signal indicating whether the ink cartridge 40 is mounted in the mounting unit 150 (whether the first valve 50 is in the open state or the closed state).
  • Fig. 9 is a block diagram showing the electrical configuration of the inkjet printer 1 and ink cartridge 40 according to this variation. As shown in Fig. 9 , the sensor 270 outputs a signal to the controller 90, and the controller 90 transfers this signal to the controller 100.
  • the sensor 270 may be a reflective-type photosensor, for example, and is configured to generate different signals for when the ink cartridge 40 is mounted and not mounted in the mounting unit 150.
  • Fig. 10 is a block diagram showing the electrical configuration of the inkjet printer 1 and ink cartridge 40 according to the second embodiment.
  • the ink cartridge 40 according to the second embodiment is not provided with the controller 90 and a direct signal transmission path is established between the storage unit 125 and photosensor 69 and the controller 100 when the contact point 91 and contact point 161 are electrically connected.
  • the remaining structure is identical to that described in the first embodiment.
  • the controller 100 executes all processes and determinations shown in Fig. 8 that were performed by the controller 90 in the first embodiment.
  • the controller 100 reads data from the storage unit 125.
  • the controller 100 determines whether data was properly read from the storage unit 125.
  • the controller 100 determines whether the prescribed time has elapsed since mounting of the ink cartridge 40 was detected.
  • the controller 100 outputs a signal to the actuator 70 for operating the actuator 70.
  • the controller 100 determines whether the operation of the actuator 70 is completed.
  • the controller 100 determines whether the second valve 60 has shifted from the closed state to the open state.
  • the controller 100 waits till the default time has elapsed after mounting was detected.
  • a sensor 370 may be provided in the ink cartridge 40 in place of the photosensor 170 provided in the body of the inkjet printer 1.
  • the sensor 370 generates a signal indicating whether the ink cartridge 40 is mounted in the mounting unit 150 (whether the first valve 50 is in the open state or the closed state).
  • Fig. 11 is a block diagram illustrating the electrical configuration of the inkjet printer 1 and ink cartridge 40 according to this variation of the second embodiment. As shown in Fig. 11 , a direct signal transmission path is established between the sensor 370 and the controller 100 when the contact point 91 and contact point 161 are electrically connected, enabling the sensor 370 to output signals to the controller 100.
  • the sensor 370 may be configured of a reflective-type optical sensor, for example, and produces different signals indicating whether the ink cartridge 40 is mounted and not mounted in the mounting unit 150.
  • the first valve may have a configuration other than that described in the above embodiments, provided that the first valve is disposed in the ink delivery tube and can be selectively switched between an open state for allowing communication in the ink delivery tube and a closed state for blocking communication in the ink delivery tube.
  • the first valve may be configured of an electrically-operated valve that can be controlled to open and close. The valve is normally in the closed state and the controller 90 or controller 100 controls the valve to open only when the ink cartridge 40 is mounted in the body of the inkjet printer 1.
  • the second valve may have a structure different from that described in the above embodiments, provided that the second valve is disposed in the ink delivery tube between the ink bag and the first valve and can be selectively switched between an open state for allowing communication in the ink channel in the ink delivery tube leading from the ink bag to the fist valve, and a closed state for blocking this channel.
  • a display may be provided on the casing 1a in place of the buzzer 13 for displaying images representing error message in place of the sounds emitted by the buzzer 13 in order to notify the user.
  • both the buzzer and display may be used in combination.
  • the power supply unit provided in the body of the inkjet printer 1 is configured to supply electrical power to the ink cartridge 40 when the ink cartridge 40 is mounted in the mounting unit 150, but the ink cartridges 40 may be configured to be self-powered. Further, the ink cartridges 40 are not limited to cartridges that supply ink, but may be cartridges that supply a liquid other than ink that require maintenance.

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EP11164283A 2011-04-29 2011-04-29 Flüssigkeitskartusche für eine Bilderzeugungsvorrichtung Withdrawn EP2517885A1 (de)

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CN103568567A (zh) * 2012-07-31 2014-02-12 珠海纳思达企业管理有限公司 喷墨墨盒、喷墨墨盒组以及喷墨墨盒的控制方法
JP2020019154A (ja) * 2018-07-30 2020-02-06 ブラザー工業株式会社 液体カートリッジ及び液体供給装置
JP2022109318A (ja) * 2018-07-30 2022-07-27 ブラザー工業株式会社 液体カートリッジ及び液体供給装置

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EP1285764A1 (de) * 2000-05-18 2003-02-26 Seiko Epson Corporation Verfahren und vorrichtung zur detektion des tintenverbrauchs
JP2005238815A (ja) 2004-01-30 2005-09-08 Seiko Epson Corp 液体容器
US20060192818A1 (en) * 2005-02-28 2006-08-31 Cristian Penciu Cartridge for dispenser of particular fluid substances
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US20080231676A1 (en) * 2007-03-23 2008-09-25 Brother Kogyo Kabushiki Kaisha Liquid ejection device and sub tank for use with the same
US20090085942A1 (en) * 2007-10-01 2009-04-02 Seiko Epson Corporation Liquid Jetting Apparatus and Control Method for the Same
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Publication number Priority date Publication date Assignee Title
CN103568567A (zh) * 2012-07-31 2014-02-12 珠海纳思达企业管理有限公司 喷墨墨盒、喷墨墨盒组以及喷墨墨盒的控制方法
CN103568567B (zh) * 2012-07-31 2015-12-02 珠海纳思达企业管理有限公司 喷墨墨盒、喷墨墨盒组以及喷墨墨盒的控制方法
JP2020019154A (ja) * 2018-07-30 2020-02-06 ブラザー工業株式会社 液体カートリッジ及び液体供給装置
JP2022109318A (ja) * 2018-07-30 2022-07-27 ブラザー工業株式会社 液体カートリッジ及び液体供給装置

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