EP3437883A1 - Cartouche d'encre pour imprimante - Google Patents

Cartouche d'encre pour imprimante Download PDF

Info

Publication number
EP3437883A1
EP3437883A1 EP17184328.7A EP17184328A EP3437883A1 EP 3437883 A1 EP3437883 A1 EP 3437883A1 EP 17184328 A EP17184328 A EP 17184328A EP 3437883 A1 EP3437883 A1 EP 3437883A1
Authority
EP
European Patent Office
Prior art keywords
chamber
ink cartridge
channel
cartridge according
ink
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.)
Granted
Application number
EP17184328.7A
Other languages
German (de)
English (en)
Other versions
EP3437883B1 (fr
Inventor
Stefan Gierse
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.)
Artech GmbH Design and Production in Plastic
Original Assignee
Artech GmbH Design and Production in Plastic
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 Artech GmbH Design and Production in Plastic filed Critical Artech GmbH Design and Production in Plastic
Priority to EP17184328.7A priority Critical patent/EP3437883B1/fr
Priority to ES17184328T priority patent/ES2790125T3/es
Publication of EP3437883A1 publication Critical patent/EP3437883A1/fr
Application granted granted Critical
Publication of EP3437883B1 publication Critical patent/EP3437883B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, 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, 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
    • B41J2/17556Means for regulating the pressure in the cartridge

Definitions

  • the present invention relates to an ink cartridge for a printer, comprising a first chamber having an inlet structure for supplying ambient air into the first chamber, a second chamber for storing ink, and a connection structure for supplying ambient air supplied from the first chamber into the second one Chamber.
  • the capillary body used requires a lot of effort in production and assembly.
  • blunt cutting tools can be used when assembling the capillary body to the end Deformation of capillaries lead.
  • the resulting negative pressure level is influenced by the deformed capillaries.
  • the capillary body has to be positioned accurately and positionally in a housing in order to function reliably. Slippage or even deformation of the capillary body during assembly can influence the self-adjusting vacuum level.
  • the invention is based on the technical problem to provide an ink cartridge for a printer, which does not have the disadvantages described above, or at least to a lesser extent and in particular allows a uniform extraction of ink at a substantially constant vacuum level.
  • the invention relates to an ink cartridge for a printer, having a first chamber, an inlet structure for supplying ambient air into the first chamber, a second chamber for storing ink, and a connection structure for supplying ambient air supplied to the first chamber in the second chamber.
  • the first chamber is configured to store a free-flowing bubbling liquid and the inlet structure has at least one channel adapted to introduce ambient air into the free-flowing bubbling liquid to be stored.
  • the channel is arranged for introducing ambient air into the free-flowing bubbling liquid to be stored in the first chamber, in the printing operation
  • Foaming and associated pressure fluctuations in the area of the ink can be avoided, as bubbling occurs in the first chamber. It can be a uniform removal of ink at a substantially constant level of negative pressure by a printer. Further, by supplying air through the bubbling liquid, drying ink can prevent an air inlet from clogging and possibly clogging.
  • the assembly and manufacture is simplified compared to solutions with capillary elements.
  • a "free flowing bubbling liquid” is a liquid that is not picked up by a capillary element such as a sponge or the like.
  • a capillary element such as a sponge or the like.
  • no capillary element such as a sponge or the like, is arranged, which is adapted to receive the bubble-forming liquid to be stored in the first chamber.
  • the channel has an orifice in the first chamber, which is formed flush with a substantially planar wall of the first chamber surrounding the mouth.
  • the channel has a projecting end portion which projects into the first chamber. Bubbles formed in the region of the projecting end section dissolve faster and there is a finer blistering with bubbles of smaller diameter.
  • the projecting web can be a narrow, thin-walled web whose transverse to a flow direction measured wall thickness is smaller than a clear width of a flow cross-section of the channel in the region of the projecting end portion.
  • the channel has a local constriction.
  • the flow cross-section formed in the region of the local constriction influences the level of vacuum that is established. By sizing the local constriction, therefore, a negative pressure level within the ink cartridge can be adjusted.
  • the local restriction may be formed in the projecting end portion to prevent backflow of bubbling liquid from the first chamber into the channel.
  • a flow cross-section of the local constriction may be limited by a web projecting into the channel.
  • a dimensioning of the flow cross-section in the region of the constriction can be carried out in a simple manner.
  • the local constriction has a profile formed on the housing and the web is formed on a cover closing the housing, wherein the profile and the web limit the flow cross-section of the local constriction.
  • the ridge project into a profile cross section to form the local constriction.
  • the profile may have a U-shaped cross section and the web may have a substantially rectangular cross-section, which is bordered on two sides by profile legs of the U-shaped profile cross section.
  • the remaining flow cross section in the area of the local constriction can be defined.
  • the local constriction may have a slot, e.g. is limited by a U-profile.
  • a dimensioning of the flow cross-section in the region of the constriction can be carried out in a simple manner.
  • a slot and / or land can be manufactured reliably and cost-effectively while maintaining close manufacturing tolerances.
  • the channel has a profile formed on the housing, which is covered by a molded element formed on the cover, wherein the profile and the shaping element define a channel cross-section.
  • This can be formed in a cost effective manner a circumferentially closed channel cross-section.
  • the ink cartridge may have a housing that is capped with a lid.
  • the lid and the housing may be welded together.
  • the lid and the housing may be made of a thermoplastic, in particular by an injection molding method or the like.
  • the channel can run at least partially meandering. In this way, a large channel length can be achieved on a comparatively small base area, in order to avoid leakage of bubble-forming liquid to be stored in the first chamber and to set a flow velocity of incoming ambient air.
  • a third chamber is provided between the first chamber and the second chamber, wherein the third chamber is a part of the connecting structure. Specifically, the third chamber is adapted to prevent mixing of bubbling liquid with ink in the first chamber and the second chamber.
  • the bubbling liquid is received, that in the second chamber, ink is absorbed and that between the liquids, a gas-filled intermediate volume is formed, wherein the bubbling liquid delimits the intermediate volume relative to the inlet structure and wherein the intermediate volume is at a negative pressure relative to an environment.
  • a liquid stored in the first chamber in cooperation with the inlet structure forms a differential pressure valve to create a defined negative pressure within the ink cartridge.
  • the bubbling liquid stored in the first chamber may have a higher surface tension than the ink stored in the second chamber.
  • the blistering fluid received in the first chamber may be, for example, glycerin.
  • the inlet structure and / or the connection structure may comprise at least one semi-permeable membrane.
  • the membrane may be adapted to allow an airflow to pass while being impermeable to a liquid to be stored in the first chamber and / or to be stored in the second chamber. This may be, for example, a membrane, as used in breathable, rainproof outdoor clothing.
  • FIGS. 1 to 10 show an ink cartridge 2 for a printer, with a first chamber 4, with an inlet structure 6 for supplying ambient air from an environment U in the first chamber 4, with a second chamber 8 for storing ink 10 and with a connection structure 12 for supplying the first chamber 4 supplied ambient air into the second chamber eighth
  • the first chamber 4 is configured to store a free-flowing bubbling liquid 14, and the inlet structure 6 has at least one channel 16 adapted to introduce ambient air into the free-flowing bubbling liquid 14 to be stored.
  • the bubble-forming liquid 14 is received in the first chamber 4.
  • the ink 10 is received in the second chamber 8.
  • the bubble-forming liquid 14 stored in the first chamber 4 has a higher surface tension than the ink 10 stored in the second chamber 8.
  • the blistering fluid 14 received in the first chamber 4 is glycerine.
  • no capillary element such as a sponge or the like, arranged to receive the bubbling liquid 14 to be stored in the first chamber 4 is presently arranged.
  • the channel 16 of the inlet structure 6 has a projecting end portion 18 which projects into the first chamber 4.
  • a narrow, thin-walled web 18 In the projecting end portion 18 is a narrow, thin-walled web 18, whose measured transverse to a flow direction S wall thickness d is smaller than a clear width w of a Flow cross-section of the channel in the region of the projecting end portion 18th
  • the channel 16 has a local constriction 20.
  • a flow cross-section 22 formed in the region of the local constriction 20 influences the self-adjusting negative pressure level.
  • the channel 16 runs meandering.
  • the local constriction 20 is formed in the projecting end portion 18.
  • the local constriction 20 has a slot 24 into which a web 26 protrudes.
  • the ink cartridge 2 has a housing 28 which is closed with a lid 30.
  • the lid 30 and the housing 28 are welded together.
  • the lid 30 and the housing 28 have been made of a thermoplastic.
  • Fig. 3 shows the lid 30 and the housing 28 separately.
  • the local constriction 20 has a profile 32 formed on the housing 28.
  • the web 26 is formed on the cover 28 closing the housing 28, the profile 32 and the web 26 delimiting the flow cross-section 22 of the local constriction 20.
  • the web 26 protrudes into the profile 32 to form the local constriction 20.
  • the profile 32 has a U-shaped cross-section.
  • the web 26 has a substantially rectangular cross-section.
  • the web 26 is bordered on two sides by profile legs 34 of the U-shaped profile cross-section.
  • the profile 32 also forms the channel 16 in which the local constriction 20 is formed.
  • the profile 32 is covered by a molded element 36 formed on the cover 30, the profile 32 and the shaping element 36 defining a channel cross-section which is larger than the remaining flow cross-section 22 of the constriction 20.
  • the channel cross-section is defined by the profile 32 and the shaped element 36 peripherally completely bordered or closed, so that an inflowing air flow must completely flow through the channel 16 along its meandering shape to get into the chamber 4.
  • a third chamber 40 is provided, wherein the third chamber 40 is a part of the connecting structure 12.
  • the third chamber 40 is adapted to prevent mixing of bubbling liquid 14 with ink 10 in the first chamber 4 and the second chamber 8.
  • a gas-filled intermediate volume is formed between the liquids 14, 10, wherein the bubble-forming liquid 14 delimits the intermediate volume with respect to the inlet structure 6 and wherein there is a negative pressure in the intermediate volume relative to an environment U.
  • the intermediate volume therefore comprises the gas volumes of the chambers 4, 8 and 40.
  • the ink cartridge 2 ink 10 is removed from the chamber 8 via an ink outlet 42.
  • the ink removal causes an inflow of ambient air into the ink cartridge 2.
  • the arrows with the label L, a describe the inflow of ambient air into the ink cartridge 2 due to the ink removal.
  • the air is conducted via an inlet port 44 of the inlet structure 6 to the channel 16, wherein the air passes through a first air-permeable, liquid-impermeable membrane 45.
  • the air continues to flow along the meandering channel 16 to the projecting end portion 18 and thereby passes through the local constriction 20, in the region of which the channel cross section is reduced to the flow cross section 22 in the manner of a throttle.
  • the air flows into the bubbling liquid 14 and forms small air bubbles 46 rising toward the surface 49 of the bubbling liquid 14.
  • the air flows via a connection opening 48 into the chamber 40. From the chamber 40, the air flows through passages 50 and a second diaphragm 52 into the chamber 8. In this case, the air through the passage openings 50 along an outer side of the cartridge 2 wherein the outer region of the passage openings 50 and an inflow channel 54 is covered by a foil 56 ( Fig. 7 ). In Fig. 6 the foil 56 is blanked to illustrate the flow of air along the outside from the ports to the inflow channel 54.
  • the incoming ambient air enters the chamber 8.
  • the initially increased by the ink extraction negative pressure in the chamber 8 is adjusted by the inflow of ambient air to the intended negative pressure level.

Landscapes

  • Ink Jet (AREA)
EP17184328.7A 2017-08-01 2017-08-01 Cartouche d'encre pour imprimante Active EP3437883B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17184328.7A EP3437883B1 (fr) 2017-08-01 2017-08-01 Cartouche d'encre pour imprimante
ES17184328T ES2790125T3 (es) 2017-08-01 2017-08-01 Cartucho de tinta para una impresora

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17184328.7A EP3437883B1 (fr) 2017-08-01 2017-08-01 Cartouche d'encre pour imprimante

Publications (2)

Publication Number Publication Date
EP3437883A1 true EP3437883A1 (fr) 2019-02-06
EP3437883B1 EP3437883B1 (fr) 2020-02-12

Family

ID=59506192

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17184328.7A Active EP3437883B1 (fr) 2017-08-01 2017-08-01 Cartouche d'encre pour imprimante

Country Status (2)

Country Link
EP (1) EP3437883B1 (fr)
ES (1) ES2790125T3 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1535743A1 (fr) * 2003-11-28 2005-06-01 Print-Rite Unicorn Image Products Co. Ltd of Zhuhai Cartouche d'encre
DE202009001744U1 (de) 2009-02-11 2009-05-28 Artech Gmbh Design + Production In Plastic Tintenkartusche
WO2011147240A1 (fr) * 2010-05-27 2011-12-01 珠海天威飞马打印耗材有限公司 Cartouche d'encre pour une imprimante à jet d'encre

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1535743A1 (fr) * 2003-11-28 2005-06-01 Print-Rite Unicorn Image Products Co. Ltd of Zhuhai Cartouche d'encre
DE202009001744U1 (de) 2009-02-11 2009-05-28 Artech Gmbh Design + Production In Plastic Tintenkartusche
WO2011147240A1 (fr) * 2010-05-27 2011-12-01 珠海天威飞马打印耗材有限公司 Cartouche d'encre pour une imprimante à jet d'encre

Also Published As

Publication number Publication date
EP3437883B1 (fr) 2020-02-12
ES2790125T3 (es) 2020-10-27

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