WO2002028646A1 - Improved inkjet ink storage and delivery system for filling unit - Google Patents

Improved inkjet ink storage and delivery system for filling unit Download PDF

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Publication number
WO2002028646A1
WO2002028646A1 PCT/US2001/031264 US0131264W WO0228646A1 WO 2002028646 A1 WO2002028646 A1 WO 2002028646A1 US 0131264 W US0131264 W US 0131264W WO 0228646 A1 WO0228646 A1 WO 0228646A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
container assembly
ink
cap
assembly
Prior art date
Application number
PCT/US2001/031264
Other languages
French (fr)
Inventor
Bruce S. Jones
Stephen A. Anderson
Original Assignee
Nu-Kote International, Inc.
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 Nu-Kote International, Inc. filed Critical Nu-Kote International, Inc.
Priority to AU2002214558A priority Critical patent/AU2002214558A1/en
Publication of WO2002028646A1 publication Critical patent/WO2002028646A1/en

Links

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
    • B41J2/17506—Refilling of the cartridge
    • 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

Definitions

  • This application relates to printing technology, and more particularly to inkjet printing where it is important that ink used to fill inkjet cartridges is not exposed to air nor is air introduced into the cartridge prior to filling.
  • inkjet ink Existing containers of inkjet ink are typically open to ambient.
  • the open containers allow dirt, dust, or other contaminants to be introduced into the ink, and ultimately into the ink cartridge.
  • solvents and water evaporate over time from the ink left exposed in an open container. This changes the physical properties of the ink.
  • an important goal of the manufacturer of these types of inkjet cartridges is the ability to achieve a repeatable level of product quality.
  • the handling and storage of inkjet ink is just one area in which improvements in quality are required.
  • An improved container assembly is provide that stores degassed ink under vacuum and easily connects to a filling unit without having to open the container to outside contaminants prior to filling.
  • the container assembly includes a container having a cavity for storing the ink therein.
  • a first connector extends from communication with the container cavity and is adapted for connection with associated filling equipment.
  • a second connector communicates with a container cavity and is adapted for connection with an associated vacuum pump.
  • a vent opening is provided in the container and is selectively sealed with a seal member.
  • the first and second connectors are preferably dissimilar types of fittings, e.g., one is a male fitting and the other is a female fitting to assure proper connection with external equipment.
  • First and second connectors are preferably valved quick-connect couplings that are normally shut off or sealed to the external environment when no connection is made with the coupling.
  • the container assembly provides a clean manner of supplying ink to the filling equipment.
  • An air tight container is provided by using the container assembly to store ink.
  • the container permits degassed ink to be stored under vacuum and easily connects with a filling unit without having to open the container.
  • FIGURE 1 is an elevational view at least partly in cross-section of a preferred container assembly according to the present invention.
  • a preferred container assembly 10 is shown in the Figure. It includes a container or housing 12 which is preferably an integrally molded container having a bottom wall 14 and a side wall 16 that is reduced in cross- sectional area in a neck region 18. The neck region terminates in an opening 20 which is closed off by a cap member 30.
  • the cap 30 is conveniently secured to the container such as via a threaded engagement with external lugs or threads provided on the container neck region.
  • alternative means of securing the cap to the container can be used without departing from the scope and intent of the present invention.
  • the cap assembly preferably forms a seal with the upper edge of the container.
  • this is accomplished by including silicon seal ring 32 that is compressed between the upper edge of the container and the internal surface of the cap assembly. Once the cap assembly has been fully threaded onto the neck region on the container, the silicon seal ring abutingly engages the top of the container and the cap on opposite sides thereof.
  • the cap assembly includes a first connector or fitting 40 adapted for selective engagement with a suction line or tube (not shown) associated with degassing equipment. It will be appreciated that applying a vacuum to ink stored within the container at a level above the vapor pressure of the ink will remove entrained air and some of the solvent. That is, the suction causes these components to "boil" from the stored ink so that these components are removed through the suction line and the ink remaining in the container has a reduced air content.
  • the cap assembly preferably includes three passages that communicate with the interior of the container.
  • the first passage 40 has a quick-connect connector or coupling 42 extending from a first or outer end thereof.
  • the quick-connect coupling when the quick-connect coupling is not secured to the associated degassing equipment (not shown) the quick-connect coupling is valved to a normally closed position. This seals any communication through the first passage 40 between ambient or atmosphere and the ink stored within the container.
  • a second or lower end 46 receives an internal suction line or tube 48.
  • the tube is preferably elongated so that an outer terminal end 50 is disposed adjacent the bottom of the container.
  • the tube is also preferably flexible and thus may require means to locate the end 50 adjacent the container bottom.
  • the locating means is a weight 52 secured to the end of the suction passage.
  • a filter 54 is provided in the second end of the suction passage to remove any particulates or contaminants that may attempt to pass therethrough.
  • a second fitting 60 has a first end 62 and also receives a quick-connect connector or coupling 64. This quick-connect coupling is also normally closed or shut off so that when not connected to associated filling equipment (not shown) , a second passage 60 is closed off from ambient.
  • a second end 64 of the fitting communicates with the cavity of the container.
  • the third passage or vent opening 70 includes a removable venting cap 72 that normally closes this third passage from communication between ambient and the interior of the container.
  • the cap 72 When filling equipment is connected to the second quick-connect, however, the cap 72 is then removed to allow the ink efficiently pumped from the container to the filling in unit. This eliminates the vacuum pressure and aids in ink flow to a location external of the container. Once the filling operation is complete, the vent cap 72 is secured back into place as illustrated in Figure 1.
  • first and second quick-connect couplings are preferably different.
  • one is a male fitting and the other is a female fitting.
  • an operator cannot inadvertently secure the external degassing equipment to the fill side of the container assembly.
  • the external filling equipment cannot be inadvertently secured to the suction fitting 40.
  • other differences between the quick-connect couplings such as keyed or coded coupling assemblies can be used to achieve the selective connecting feature.
  • the venting cap is fitted with a suction tube, a filter cap, and means to keep the tubing located at the bottom of the container.
  • the suction tubing is attached to the inside of the venting cap and is also attached to the container with screw threads.
  • a quick- disconnect fitting is attached to a mating barb fitting with plastic tubing. This allows a mating quick-disconnect fitting to interface therewith which is then connected with an external fitting unit.
  • the quick-connect fittings are self sealing up to twenty eight inches of mercury and only open when the mating fitting are snapped or locked together.
  • a vacuum can be applied to the container through the tubing which has a second quick-disconnect connector fitting. This allows connection with the external vacuum pump for filling purposes.
  • the vent cap is removed just prior to ink from the container to the filling unit to remove vacuum pressure as an aid in ink flow.

Abstract

A container assembly (10) is provided for storing degassed ink used in a process for filling an inkjet cartridge. The container assembly includes a container (12) having a cavity for storing the degassed ink. A first quick-connect coupling (60) allows the container to be connected to associated filling equipment in an air tight manner. A second quick-connect coupling (40) provides connection with an associated vacuum pump of external degassing equipment. A vent opening (70) is provided in the container and is selectively sealed to maintain a vacuum envionment except during the filling process where the vent opening must be exposed to ambient.

Description

IMPROVED INKJET INK STORAGE AND DELIVERY SYSTEM FOR FILLING UNIT
Gross-Reference to Related Applications
[0001] This application claims priority the priority benefit of Provisional Application Serial No. 60/239,078, filed on October 6, 2000.
Background of the Invention
[0002] This application relates to printing technology, and more particularly to inkjet printing where it is important that ink used to fill inkjet cartridges is not exposed to air nor is air introduced into the cartridge prior to filling.
[0003] It is known in the inkjet art that the introduction of air into a cartridge cavity can have adverse consequences in the print quality associated with the cartridge. For example, air may actually preclude printing in its entirety by forming a pocket or interruption in a capillary ink flow path that extends between the reservoir and printhead. Thus, careful attention is provided by the manufacturer to filling inkjet cartridges in order to limit the potential for air pockets being created. Moreover, shipping, handling, and storage allows air trapped in the cartridge to mix with the liquid ink. This can result in poor quality printing or print voids being formed.
[0004] Existing containers of inkjet ink are typically open to ambient. The open containers allow dirt, dust, or other contaminants to be introduced into the ink, and ultimately into the ink cartridge. In addition, solvents and water evaporate over time from the ink left exposed in an open container. This changes the physical properties of the ink. As will be appreciated, an important goal of the manufacturer of these types of inkjet cartridges is the ability to achieve a repeatable level of product quality. Thus, the handling and storage of inkjet ink is just one area in which improvements in quality are required.
Summary of the Invention
[0005] An improved container assembly is provide that stores degassed ink under vacuum and easily connects to a filling unit without having to open the container to outside contaminants prior to filling.
[0006] The container assembly includes a container having a cavity for storing the ink therein. A first connector extends from communication with the container cavity and is adapted for connection with associated filling equipment. A second connector communicates with a container cavity and is adapted for connection with an associated vacuum pump. Still further, a vent opening is provided in the container and is selectively sealed with a seal member.
[0007] The first and second connectors are preferably dissimilar types of fittings, e.g., one is a male fitting and the other is a female fitting to assure proper connection with external equipment.
[0008] First and second connectors are preferably valved quick-connect couplings that are normally shut off or sealed to the external environment when no connection is made with the coupling.
[0009] The container assembly provides a clean manner of supplying ink to the filling equipment.
[0010] An air tight container is provided by using the container assembly to store ink.
[0011] The container permits degassed ink to be stored under vacuum and easily connects with a filling unit without having to open the container.
[0012] Still other benefits and advantages of the invention will become apparent to those skilled in the art upon reading and understanding the following detailed description. Brief Description of the Drawings
[0013] FIGURE 1 is an elevational view at least partly in cross-section of a preferred container assembly according to the present invention.
Detailed Description of the Preferred Embodiment
[0014] A preferred container assembly 10 is shown in the Figure. It includes a container or housing 12 which is preferably an integrally molded container having a bottom wall 14 and a side wall 16 that is reduced in cross- sectional area in a neck region 18. The neck region terminates in an opening 20 which is closed off by a cap member 30. Preferably the cap 30 is conveniently secured to the container such as via a threaded engagement with external lugs or threads provided on the container neck region. Of course alternative means of securing the cap to the container can be used without departing from the scope and intent of the present invention.
[0015] The cap assembly preferably forms a seal with the upper edge of the container. Here, this is accomplished by including silicon seal ring 32 that is compressed between the upper edge of the container and the internal surface of the cap assembly. Once the cap assembly has been fully threaded onto the neck region on the container, the silicon seal ring abutingly engages the top of the container and the cap on opposite sides thereof.
[0016] The cap assembly includes a first connector or fitting 40 adapted for selective engagement with a suction line or tube (not shown) associated with degassing equipment. It will be appreciated that applying a vacuum to ink stored within the container at a level above the vapor pressure of the ink will remove entrained air and some of the solvent. That is, the suction causes these components to "boil" from the stored ink so that these components are removed through the suction line and the ink remaining in the container has a reduced air content. [0017] The cap assembly preferably includes three passages that communicate with the interior of the container. The first passage 40 has a quick-connect connector or coupling 42 extending from a first or outer end thereof. As shown in Figure 1, when the quick-connect coupling is not secured to the associated degassing equipment (not shown) the quick-connect coupling is valved to a normally closed position. This seals any communication through the first passage 40 between ambient or atmosphere and the ink stored within the container. A second or lower end 46 receives an internal suction line or tube 48. The tube is preferably elongated so that an outer terminal end 50 is disposed adjacent the bottom of the container. The tube is also preferably flexible and thus may require means to locate the end 50 adjacent the container bottom. For example, in the preferred arrangement the locating means is a weight 52 secured to the end of the suction passage. In addition, a filter 54 is provided in the second end of the suction passage to remove any particulates or contaminants that may attempt to pass therethrough.
[0018] A second fitting 60 has a first end 62 and also receives a quick-connect connector or coupling 64. This quick-connect coupling is also normally closed or shut off so that when not connected to associated filling equipment (not shown) , a second passage 60 is closed off from ambient. A second end 64 of the fitting communicates with the cavity of the container. When the associated filling equipment is operatively secured to the second quick- connect, a vacuum draws degassed ink stored in the container through the end 64 of the second fitting. As will be appreciated, the third passage or vent opening 70 includes a removable venting cap 72 that normally closes this third passage from communication between ambient and the interior of the container. When filling equipment is connected to the second quick-connect, however, the cap 72 is then removed to allow the ink efficiently pumped from the container to the filling in unit. This eliminates the vacuum pressure and aids in ink flow to a location external of the container. Once the filling operation is complete, the vent cap 72 is secured back into place as illustrated in Figure 1.
[0019] It will also be appreciated that the first and second quick-connect couplings are preferably different. In the preferred arrangement, one is a male fitting and the other is a female fitting. In this manner, an operator cannot inadvertently secure the external degassing equipment to the fill side of the container assembly. Likewise, the external filling equipment cannot be inadvertently secured to the suction fitting 40. Of course, other differences between the quick-connect couplings such as keyed or coded coupling assemblies can be used to achieve the selective connecting feature. [0020] In summary, the venting cap is fitted with a suction tube, a filter cap, and means to keep the tubing located at the bottom of the container. The suction tubing is attached to the inside of the venting cap and is also attached to the container with screw threads. A quick- disconnect fitting is attached to a mating barb fitting with plastic tubing. This allows a mating quick-disconnect fitting to interface therewith which is then connected with an external fitting unit. The quick-connect fittings are self sealing up to twenty eight inches of mercury and only open when the mating fitting are snapped or locked together. A vacuum can be applied to the container through the tubing which has a second quick-disconnect connector fitting. This allows connection with the external vacuum pump for filling purposes. The vent cap is removed just prior to ink from the container to the filling unit to remove vacuum pressure as an aid in ink flow. [0021] By using the self sealing quick-disconnects, the cap of the vent passage, and the silicon seal ring between the cap and the container, a vacuum is maintained on the ink, thereby preventing air from re-entering the container. [0022] The invention has been described with reference to a preferred embodiment. Obviously, alterations and modifications will occur to others upon a reading and understanding of this specification. It should be noted that the system described may be modified slightly without departing from the scope and intent or the present invention. The specification is intended to include all such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

Having thus described the invention, it is now claimed:
1. A container assembly for storing degassed ink used in a process for filling an inkjet cartridge, the container assembly comprising: a container having a cavity for storing a predetermined quantity of ink therein; and a first connector in the container adapted to connect with associated filling equipment, a second connector in the container adapted to connect with an associated vacuum pump, and a vent opening in the container selectively sealed with a seal member.
2. The container assembly of claim 1 further comprising a cap for the container that has the first and second connectors and the vent opening therein.
3. The container assembly of claim 2 further comprising a seal interposed between the cap and the container.
4. The container assembly of claim 1 wherein the first and second connectors have dissimilar fittings to assure proper connection with associated external equipment.
5. The container assembly of claim 1 further comprising a suction tube extending into the container from the first connector.
6. The container assembly of claim 5 further comprising means for locating the suction tube adjacent a bottom of the container.
7. The container assembly of claim 6 further comprising a filter in the suction tube to remove contaminants from the ink.
8. The container assembly of claim 1 wherein the first and second connectors include valved quick-connect couplings where the valves are closed to the external environment when no connection is made.
9. A container assembly that limits air exposure and introduction into a degassed ink stored therein, the container assembly comprising: a container having a cavity for storing a predetermined quantity of ink therein; and a first quick connect coupling communicating with the container cavity and adapted to connect with associated filling equipment, a second quick connect coupling communicating with the container cavity and adapted to connect with an associated vacuum pump, and a vent opening communicating with the container cavity and selectively closed by a cap seal member.
10. The container assembly of claim 9 further comprising a cap threadably engaging around a container opening, the cap containing the first and second couplings and the vent opening therein.
11. The container assembly of claim 10 further comprising a seal interposed between the cap and the container.
12. The container assembly of claim 9 wherein the first and second couplings have dissimilar fittings to assure proper connection with associated external equipment.
13. The container assembly of claim 9 further comprising a suction tube extending into the container from the first coupling.
14. The container assembly of claim 13 further comprising means for locating the suction tube adjacent a bottom of the container.
15. The container assembly of claim 13 further comprising a filter in the suction tube to remove contaminants from the ink.
PCT/US2001/031264 2000-10-06 2001-10-05 Improved inkjet ink storage and delivery system for filling unit WO2002028646A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002214558A AU2002214558A1 (en) 2000-10-06 2001-10-05 Improved inkjet ink storage and delivery system for filling unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23907800P 2000-10-06 2000-10-06
US60/239,078 2000-10-06

Publications (1)

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WO2002028646A1 true WO2002028646A1 (en) 2002-04-11

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101117053A (en) * 2007-09-01 2008-02-06 珠海天威飞马打印耗材有限公司 Ink-filling device and ink filling method of the ink-filling device
WO2011075998A1 (en) * 2009-12-21 2011-06-30 珠海纳思达企业管理有限公司 Ink filling device
WO2011137637A1 (en) * 2010-05-01 2011-11-10 珠海纳思达企业管理有限公司 Ink cartridge refilling device and method for refilling ink cartridge using it
WO2014084825A1 (en) * 2012-11-29 2014-06-05 Hewlett-Packard Development Company, L.P. Ink tank parts

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6010210A (en) * 1997-06-04 2000-01-04 Hewlett-Packard Company Ink container having a multiple function chassis
US6058984A (en) * 1997-07-30 2000-05-09 Canon Kabushiki Kaisha Method for filling liquid into liquid container with liquid chamber, and liquid filling apparatus
US6302534B1 (en) * 1998-12-22 2001-10-16 Seiko Epson Corporation Method for recycling ink cartridge used for recording apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6010210A (en) * 1997-06-04 2000-01-04 Hewlett-Packard Company Ink container having a multiple function chassis
US6058984A (en) * 1997-07-30 2000-05-09 Canon Kabushiki Kaisha Method for filling liquid into liquid container with liquid chamber, and liquid filling apparatus
US6302534B1 (en) * 1998-12-22 2001-10-16 Seiko Epson Corporation Method for recycling ink cartridge used for recording apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101117053A (en) * 2007-09-01 2008-02-06 珠海天威飞马打印耗材有限公司 Ink-filling device and ink filling method of the ink-filling device
CN101117053B (en) * 2007-09-01 2013-05-01 珠海天威飞马打印耗材有限公司 Ink-filling device and ink filling method of the ink-filling device
WO2011075998A1 (en) * 2009-12-21 2011-06-30 珠海纳思达企业管理有限公司 Ink filling device
WO2011137637A1 (en) * 2010-05-01 2011-11-10 珠海纳思达企业管理有限公司 Ink cartridge refilling device and method for refilling ink cartridge using it
GB2495380A (en) * 2010-05-01 2013-04-10 Zhuhai Ninestar Man Co Ltd Ink cartridge refilling device and method for refilling ink cartridge using it
GB2495380B (en) * 2010-05-01 2016-04-13 Zhuhai Ninestar Man Co Ltd Ink cartridge refilling device and ink cartridge refilling method utilizing the same for ink refilling
WO2014084825A1 (en) * 2012-11-29 2014-06-05 Hewlett-Packard Development Company, L.P. Ink tank parts
US9296212B2 (en) 2012-11-29 2016-03-29 Hewlett-Packard Development Company, L.P. Ink tank parts
US9597881B2 (en) 2012-11-29 2017-03-21 Hewlett-Packard Development Company, L.P. Ink tank parts

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