DE19534577C2 - Ink cartridge and ink jet recorder - Google Patents

Ink cartridge and ink jet recorder

Info

Publication number
DE19534577C2
DE19534577C2 DE1995134577 DE19534577A DE19534577C2 DE 19534577 C2 DE19534577 C2 DE 19534577C2 DE 1995134577 DE1995134577 DE 1995134577 DE 19534577 A DE19534577 A DE 19534577A DE 19534577 C2 DE19534577 C2 DE 19534577C2
Authority
DE
Germany
Prior art keywords
ink
ink supply
sealing part
ink cartridge
cannula
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.)
Expired - Lifetime
Application number
DE1995134577
Other languages
German (de)
Other versions
DE19534577A1 (en
Inventor
Satoshi Shinada
Seiji Mochizuki
Yoshinori Miyazawa
Takao Kobayashi
Hisashi Koike
Yukiharu Suda
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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
Family has litigation
Priority to JP24851694 priority Critical
Priority to JP11928995A priority patent/JP3513979B2/en
Application filed by Seiko Epson Corp filed Critical Seiko Epson Corp
Priority claimed from DE29520949U external-priority patent/DE29520949U1/en
Publication of DE19534577A1 publication Critical patent/DE19534577A1/en
Application granted granted Critical
Publication of DE19534577C2 publication Critical patent/DE19534577C2/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26457052&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE19534577(C2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/17Ink jet characterised by ink handling
    • B41J2/175Ink supply systems ; Circuit parts therefor
    • B41J2/17503Ink cartridges
    • B41J2/17536Protection of cartridges or parts thereof, e.g. tape
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/17Ink jet characterised by ink handling
    • B41J2/175Ink supply systems ; Circuit parts therefor
    • B41J2/17503Ink cartridges
    • B41J2/17513Inner structure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/17Ink jet characterised by ink handling
    • B41J2/175Ink supply systems ; Circuit parts therefor
    • B41J2/17503Ink cartridges
    • B41J2/1752Mounting within the printer
    • B41J2/17523Ink connection

Description

The present invention relates to an ink cartridge according to the preamble of claim 1 and on a ink jet using such an ink cartridge Recorder.

A known ink jet printer in which an ink unit and a print head is arranged on a carriage in EP 0 581 531 A1. With this printer the Ink tank to avoid printing failures that due to variations in ink level or air bubbles can, which in turn by movements of the sled co-moving ink tank caused in two Areas divided. A first one, next to the printhead arranged area of the container contains an inked impregnated, porous element, such as. B. a foam, and a second area contains liquid ink without a porous one Element. This structure enables the ink to reach the printhead through the porous element so that the occurrence of problems caused by movement of the ink in the container is prevented to a certain extent.

The porous element protrudes with the printhead protruding part, which by a in the side area of the Container-formed hole is inserted in permanent Fluid connection. However, such a structure cannot be applied to a printhead that has penetration of air bubbles in a pressure chamber must be prevented, such as they z. B. occurs in printheads in which a piezoelectric vibrator as an actuator of the Ink ejection is used.  

DE 28 12 562 C2 describes an optional device Shutting off ink flow in ink pens described, wherein a hollow needle through a in the wall an ink reservoir plug inserted is introduced.

Furthermore, an ink cartridge is known from EP 0553535 A1, where a cannula over a film as a sealing material is introduced.

EP 0581531 A1 describes an ink container which has several Has chambers and for example via an opening is accessible.

Finally, from DE 27 25 270 C2 a device for Connect an ink head to one Ink supply known, with a partition of one Cannula is pierced to create a fluid connection between a cavity and the inside of a bubble.

It is an object of the invention to have a removable one Inkjet recording device attachable ink cartridge create a seal between the Ink supply opening of the ink cartridge and one Ink supply cannula is guaranteed even if the Ink cartridge offset or at an angle on the inkjet Recording device is attached.

This object is achieved by an ink cartridge solved with the features of claim 1.

Advantageous developments of the invention result from the subclaims.

The sealing part is funnel-shaped and preferably has a wide one End and a narrow end, the narrow end of the chamber  is located remotely. The sealing part serves advantageously to an ink flow through the Ink supply port that is not through the ink supply cannula leads to prevent when the ink supply cannula in the Ink supply port is positioned.

According to another aspect, there is provided an ink jet printer for dispensing ink onto a recording medium comprising:
a printhead for ejecting ink;
an ink supply cannula connected to the printhead and having at least one through hole for the passage of ink; and
an ink cartridge according to the invention, which is preferably detachably or removably attached to the ink supply cannula.

When an ink supply cannula is inserted into the printhead When the ink supply port is inserted, it touches the port the cannula in a flexible manner the sealing part. Since that Sealing part has an upwardly open, funnel-like shape, it is easily deformed to the ink supply cannula to give in. In addition, this compliance causes one close contact of the sealing part with the cannula. This can a possible incorrect alignment of Ink supply cannula and ink supply opening balanced so that the ink supply port is securely sealed can be.

An additional, further aspect of the invention is that Provision of a cartridge for an inkjet printer, that with minimal effort under large tolerances used with respect to the alignment of the ink supply cannula can be, and which is attached to the printhead that a hermetic seal is achieved during the Dead space is as small as possible.

The invention is described below with reference to a drawing illustrated embodiment explained.

Fig. 1 is a schematic view showing the ink supply system of an ink jet printer.

Fig. 2 is a cross sectional view of a multi-color ink jet printer cartridge in accordance with an embodiment of the present invention.

FIG. 3 is a cross-sectional view of the embodiment rotated 90 degrees compared to the view of FIG. 2.

Fig. 4 is a perspective view showing the ink cartridge of Figs. 2 and 3 with the cover removed.

Fig. 5 (a) is a cross-sectional view showing a seal member with an ink supply cannula inserted therein.

Fig. 5 (b) is a cross-sectional view of the sealing member before the cannula is inserted.

A printhead can be in a four-color printer plotter or Color printers are used and have four Color ink systems and associated ink nozzles. The Four color printer plotter sets black, red, green and blue Ink and move the printhead or a sheet of paper, or both, to then create ink in one of the desired Colors like in a conventional print head on one spraying predetermined location of the paper to be printed, to form an ink dot. Desired letters and Drawings can thus be repeated by repeating the above Sequence can be recorded. The present invention can can be applied to all types of inkjet printers, including those with printheads that use heat Generate resistors or the like, or on the  Displacement of piezoelectric elements or transducers based on a drop of ink after applying a Eject pressure signal from a chamber. The Ink supply containers can pass ink through said chambers Feed capillary paths continuously.

In a color printer, the inks in four colors is used, i.e. in black, red, green and blue, a Sheet of paper through a printhead in one direction scanned that are orthogonal to the direction of paper transport to form a dotted line in one scan pass whereby the paper is continued line by line in order to Record pictures. Seven-color printers use inks four colors, namely black, yellow, magenta, and cyan, used, with red, green and blue due to overlapping inks in two of the three desired colors (except black) on one Sheets of paper are formed, creating color images in total seven colors can be recorded.

Fig. 1 is a schematic view showing an ink supply system of an ink jet recording apparatus.

An ink jet type print head unit 1 is connected to an ink tank 3 by means of a connector 2 . Ink from the ink tank 3 to the print head 1 through a cannula 2 a and an ink supply passage 2b of the fastener 2 fed so that the printing head unit 1 is capable of ejecting ink droplets in accordance with print signals.

The apparatus shown in Fig. 1 further includes a cap member 4 located outside the printing area, which is abuttingly applied to the nozzle plate of the printhead unit 1 by a drive mechanism, not shown, in order to prevent the nozzle openings from drying out.

The cap member 4 is connected by a pipe 8 to a suction pump 5 , which is operated by a control unit 6 to suck ink from the print head unit 1 through the cap member 4 . The device in FIG. 1 is further equipped with an outflow tank 7 which is connected to an outlet opening of the suction pump 5 by a pipe 9 .

The ink cartridge is designed so that it can be used with little effort and with adaptation to certain positioning deviations. Reference is first made to Figs. 2 and 3 which show an ink cartridge constructed in accordance with the present invention. A main container 501 is divided by compartments 502 and 503 into three compartments or units 504 , 505 and 506 , as shown in FIG. 3. Each of the three compartments 504 , 505 and 506 is separated by a central partition 510 in foam chambers 511 , 511 'and 511 ", each of which houses a corresponding porous element 520 , 520 ', and 520 ", as well as in ink chambers 512 , 512 'and 512 "for holding liquid ink. The foam chambers 511 , 511 ', and 511 " are dimensioned so that they can accommodate a corresponding porous element 520 , 520 ', and 520 ".

The volume of each of the porous elements 520 , 520 ', and 520 "is set to be greater than the capacity of the foam chambers 511 , 511 ' and 511 " so that it is preferably compressed in the foam chamber 511 , 511 'and 511 " The capacity ratio of the individual foam chambers 511 , 511 'and 511 "to the ink chambers 512 , 512 ' and 512 " is chosen so that each of the foam chambers 511 , 511 'and 511 "can hold 20 to 30% more ink than the associated ink chambers 512 , 512 'and 512 ".

If, such as For example, in Figures 2-4 , which have three colored inks in an ink cartridge, it can be difficult to determine whether there are different amounts of ink remaining in each chamber, which can be caused by unbalanced consumption of the different colored inks. If the ink of one color is exhausted and the user wants to throw the cartridge away, there is no need to worry about the other color inks in the leaking cartridge. If a cartridge according to the invention is thrown away, leakage from the cartridge is prevented by the respective inks being absorbed by the associated porous elements, so that the environment is protected from leakage of the inks.

The ink supply openings 513 , 513 'and 513 "(not shown), as shown by way of example with the foam chamber 511 for foam chambers 511 , 511 ' and 511 ", are formed in the main container 501 within an associated foam chamber 511 , 511 'and 511 ". Each of the Ink supply ports 513 , 513 'and 513 "are designed for connection to a corresponding ink supply cannula (not shown) of the printhead which are inserted at the lower end of each of the foam chambers 511 , 511 ' and 511 ".

As shown in FIGS. 2 and 3, the upper end of the main container 501 is closed with a lid 516 . Two ink fill openings 514 and 515 are located above the foam chamber 511 in the lid. Similarly, each of the chambers 511 , 511 'and 511 "includes associated ink fill ports 514 and 515 , 514 ' and 515 ', 514 " and 515 ". Protrusions 516a and 516b ( Fig. 2) are in the inner surface of the lid 516 integrated and arranged in the foam chamber 511 so that they surround the filling openings 515 and 514. The porous element 520 is pressed by the projections 516 a and 516 b against the lower wall of the foam chamber 511 , in which the ink supply opening 513 is formed Similarly, the protrusions 516 a 'and 516 b', 516 a "and 516 b" are formed on the inner wall of the lid 516. They are correspondingly above the foam chambers 511 'and 511 "which the ink supply openings 513 ' and 513 " included, positioned as shown in Fig. 3.

The lower tip of the projection 516 a, which is opposite the ink supply opening 513 , is arranged lower than the lower tip of the projection 516 b, whereby the portion of the porous element 520 , which is in the vicinity of the ink supply opening 513, is most compressed.

The protruding portions 522 , 522 'and 522 ", which together with the lid 516 compress the porous elements 520 , 520 ' and 520 ", are formed at the bottom of each of the foam chambers 511 , 511 'and 511 ". Recesses 523 , 523 ' and 523 "(summarized as 523 ) bounding spaces with a fixed surface are formed at the top of the respective protruding portions 522 . Through holes 524 , 524 'and 524 "(collectively, 524 ) are formed in the projecting portions 522 , respectively, and serve as ink passages. One end of each of these through holes 524 is in fluid communication with the spaces defined by the recesses 523 , and the other end with the respective sealing parts (summarized as 530 ), which are described below. The recesses 523 , 523 'and 523 "preferably have a cross-sectional area that is larger than the cross-sectional area of the ink passages 524 . Filters 525 , 525 'and 525 "(not shown) are attached to the top of the recesses 523 .

The sealing parts 530 , of which only the actual 530 is shown, are arranged at the lower end of the ink supply openings 513 , 513 'and 513 "in a region of a larger cross-sectional area than that of the through holes 524 and consist of a resilient material such as rubber. The sealing parts 530 are designed as a funnel-shaped seal with an end that is open at the top The lower ends of the tubular regions 531 are thicker than the other regions The respective upper edge edges 533 of the constrictions of the constrictions 532 of the respective sealing parts 530 touch the stop or stepped region 513 a which is between the larger cross sectional area and the holes 524 of the respective ink supply ports 513 , 513 'and 513 ". Each sealing part 530 is provided with beads 535 , which engage in lateral grooves 527 within the inner wall of the ink supply opening 513 . The tubular regions 531 serving as holding sections and the constrictions 532 are connected to one another by thin connecting regions 534 .

With this construction, the sealing parts 530 are fixed or held with their tubular regions 531 at the respective ink supply openings 513 . In addition, an upward movement of the upper edge 533 is prevented by the stops 513 a. Thus, even when the associated ink supply cannula is inserted or withdrawn, the sealing parts 530 are suitably connected to the ink supply openings 513 . Furthermore, since the constrictions serve to achieve a hermetic seal between the sealing part of the respective ink supply opening and the ink supply cannula, the constrictions can be moved somewhat without deforming because of the thin connecting regions 534 . As a result, the airtight seal between the respective sealing member and the ink supply cannula can be obtained because a relative misalignment between the respective ink supply cannula and the ink supply opening can be compensated for.

Passages or communication openings 519 , 519 'and 519 "are formed in the central partition 510 which separates the foam chambers 511 , 511 ' and 511 " from the ink chambers 512 , 512 'and 512 ". Slots 519 a, 519 a' and 519 a "are formed up to a certain height in the partition 510 and are connected to the connection openings for the purpose of gas-liquid exchange. The porous elements 520 , 520 'and 520 "are inserted into the foam chambers 511 , 511 ' and 511 " such that each against the connection opening 519 , 519 'and 519 "between each pair of foam and ink chambers 511 and 512 , 511 ' and 512 ', as well as 511 "and 512 ". Ribs 518 , 518 ' and 518 "are formed on the rear wall 501a of the container 501 in each of the ink chambers 512 , 512 'and 512 ". In each case, an individual connection opening is formed between the Chamber pairs 511 , 512 formed, which extends only over a portion of the partition 510 formed therebetween.

As shown in Figs. 5 (a) and 5 (b), an ink supply port 513 of the ink cartridge is positioned so that it is aligned with the ink supply cannula 550 of the printhead. The ink cartridge is then pushed towards the printhead for insertion. A narrowed area 551 of the ink cannula 550 passes through the film seal 546 and contacts the opening of the sealing member 530 , as shown in FIG. 5 (a). Since the sealing part 530 is open at the top, it allows the ink supply cannula to pass through the narrowed area 551 of the ink supply cannula 550 with resilient deformation.

When the cartridge is used, the ink supply cannula 550 extends through the sealing part 530 . The compliance of the connection area 534 of the sealing part 530 allows the constriction 532 to touch the ink supply cannula 550 . Even if the ink supply cannula 550 of the print head and the center of the sealing member 530 are slightly offset from each other, the ink supply opening 513 and the ink supply cannula 550 are hermetically sealed.

In order to supply ink to the printhead after insertion of the ink cartridge, or to restore ink ejection, a negative pressure is applied to the printhead and thus through the ink supply cannula, so that ink flows from the cartridge via the cannula to the printhead. Due to the pressure differential due to the high negative pressure applied to the cartridge, the throat 532 of the sealing member 530 , which hermetically seals the cartridge and isolates it from the ambient air, is caused to rise upward in Fig. 5 (a) toward the interior the cartridge is deformed. The pressure difference thus helps to press the constriction 532 of the sealing part 530 resiliently against the ink supply cannula, which supports the hermetic sealing of the ink cartridge.

Even if the ink supply cannula does not fully extend through the sealing part 530 , the resilient force in the constriction 532 of the sealing part 530 allows it to remain in contact with the ink supply cannula as long as the constricted region 551 of the ink supply cannula 550 remains in contact with the constriction 532 as shown in Fig. 5 (b). As a result, it is possible to ensure the airtightness of the sealing member 530 and the ink supply cannula 550 even if the cannula is not properly inserted, and prevent ink flow outside the ink supply cannula 550 .

Since the constricted area of the ink supply cannula 550 is sealed when it comes into contact with the sealing part 530 , the dead space in the cartridge can be kept very small, and air bubbles which may have arisen as a result of a "pestle effect" when the cartridge is placed on the printhead will penetrate hindered in the cartridge.

Claims (7)

1. Ink cartridge, which can be removably attached to an ink jet recording device, with:
  • 1. a chamber ( 511 );
  • 2. an ink supply port ( 513 ) extending through a wall of the chamber ( 511 ) to deliver ink to the outside of the ink cartridge; and
  • 3. a sealing member ( 530 ), which is provided in the ink supply opening ( 513 ) and has a through opening, wherein the sealing part ( 530 ) has dimensions and is made of a material to receive an ink supply cannula ( 550 ) from an ink jet recording device and resiliently hitting an outer boundary of the ink supply cannula ( 550 ),
characterized in that
  • 1. the sealing part ( 530 ) has a funnel-shaped area for sealing against the ink supply opening ( 513 ), a thick tubular holding section ( 531 ) fixed to the wall of the chamber ( 511 ) and a thin connecting area ( 534 ) between the funnel-shaped area and the thick tubular Holding section ( 531 ) has.
2. Ink cartridge according to claim 1, characterized in that the sealing part ( 530 ) has a constriction ( 532 ) with a wide end and a narrow end, the narrow end being arranged away from the chamber ( 511 ).
3. Ink cartridge according to claim 1 or 2, characterized in that the ink supply opening ( 513 ) has an ink passage ( 524 ) which is defined by an inner wall, the thick tubular holding portion ( 531 ) of the sealing part ( 530 ) through the inner wall of the ink supply opening ( 513 ) is held.
4. Ink cartridge according to claim 3, characterized in that the ink passage ( 524 ) through the ink supply opening ( 513 ) has a stepped region ( 513 a) between an area of relatively small cross-sectional area closer to the chamber ( 511 ) and an area of larger cross-sectional area.
5. Ink cartridge according to claim 4, characterized in that the sealing part ( 530 ) abuts the stepped region ( 513 a).
6. Ink cartridge according to claim 4 or 5, characterized in that the region of larger cross-sectional area of the passage ( 524 ) has a lateral groove ( 527 ), the thick tubular holding section ( 531 ) of the sealing part ( 530 ) having a bead ( 535 ) for receiving in the groove ( 527 ).
7. An ink jet recording apparatus for discharging ink onto a recording medium, comprising:
a printhead for ejecting ink;
an ink supply cannula ( 550 ) connected to the printhead and having at least one through opening for the passage of ink; and
an ink cartridge according to any one of claims 1 to 6.
DE1995134577 1994-09-16 1995-09-18 Ink cartridge and ink jet recorder Expired - Lifetime DE19534577C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP24851694 1994-09-16
JP11928995A JP3513979B2 (en) 1994-09-16 1995-04-20 Ink cartridge for inkjet printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE29520949U DE29520949U1 (en) 1994-09-16 1995-09-18 Inkjet printer, ink cartridge for inkjet printers and ink supply system

Publications (2)

Publication Number Publication Date
DE19534577A1 DE19534577A1 (en) 1996-03-28
DE19534577C2 true DE19534577C2 (en) 1999-12-23

Family

ID=26457052

Family Applications (2)

Application Number Title Priority Date Filing Date
DE1995134613 Expired - Fee Related DE19534613C2 (en) 1994-09-16 1995-09-18 Ink cartridge for an inkjet printer
DE1995134577 Expired - Lifetime DE19534577C2 (en) 1994-09-16 1995-09-18 Ink cartridge and ink jet recorder

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE1995134613 Expired - Fee Related DE19534613C2 (en) 1994-09-16 1995-09-18 Ink cartridge for an inkjet printer

Country Status (16)

Country Link
JP (1) JP3513979B2 (en)
KR (1) KR100381991B1 (en)
CN (6) CN1090567C (en)
AR (1) AR055387A2 (en)
AU (3) AU691021B2 (en)
BR (3) BR9504688A (en)
CH (5) CH691364A5 (en)
DE (2) DE19534613C2 (en)
ES (3) ES2123398B1 (en)
FR (3) FR2727055B1 (en)
GB (3) GB2293141B (en)
HK (7) HK1008318A1 (en)
IT (3) IT1280466B1 (en)
NL (3) NL1001207C2 (en)
NZ (3) NZ280044A (en)
TW (2) TW319386U (en)

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AU3171295A (en) 1996-03-28
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