EP0378241A2 - Vorratsbehälter - Google Patents

Vorratsbehälter Download PDF

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Publication number
EP0378241A2
EP0378241A2 EP19900100653 EP90100653A EP0378241A2 EP 0378241 A2 EP0378241 A2 EP 0378241A2 EP 19900100653 EP19900100653 EP 19900100653 EP 90100653 A EP90100653 A EP 90100653A EP 0378241 A2 EP0378241 A2 EP 0378241A2
Authority
EP
European Patent Office
Prior art keywords
recording head
ink jet
jet recording
members
storage container
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
EP19900100653
Other languages
English (en)
French (fr)
Other versions
EP0378241B1 (de
EP0378241A3 (en
Inventor
Kazuaki Masuda
Nobuyuki Kuwabara
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Publication of EP0378241A2 publication Critical patent/EP0378241A2/de
Publication of EP0378241A3 publication Critical patent/EP0378241A3/en
Application granted granted Critical
Publication of EP0378241B1 publication Critical patent/EP0378241B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J2/17533—Storage or packaging of ink cartridges

Definitions

  • the present invention relates to a storage container adapted for use in an ink jet head for forming a record by discharging liquid thereby forming a flying liquid droplet, and more particularly to a storage container adapted for delivery to general users in the commercial systems of replaceable and disposable ink jet head.
  • ink jet recording is to form a flying liquid droplet by discharging liquid ink from an orifice of an ink jet recording head and to deposit said droplet onto a recording sheet, thereby recording various characters and patterns by the group of thus formed ink dots.
  • the ink employed in ink jet recording is composed of a small amount of dye dissolved in water, with addition of a water-miscible organic solvent such as alcohol, if necessary.
  • a water-miscible organic solvent such as alcohol
  • water represents a highest proportion in the composition. Consequently, if the ink jet recording head is left unused for a prolonged period, evaporation of water from the ink takes plate from the discharge port of said head, thereby elevating the dye concentration in the ink and eventually causing solid deposition of the dye after a long period, whereby the discharge port is blocked and becomes incapable of ink discharge. This phenomenon has been pointed out as a weak point of the ink jet recording.
  • such ink jet recording head usually has 10 to 256 discharge ports, but such discharge ports are preferably present in a higher density and in a larger number, in order to achieve a higher printing speed and/or a higher print quality.
  • an increase in the number of the discharge ports will lead to an increase in the number of electric wirings for driving the ink jet recording head, or in the number of electrical contacts between the ink jet recording head and the printer.
  • a head with 48 discharge ports requires 96 contacts in total, namely two for each discharge port. It is extremely difficult technically to connect a large number of electrical contacts with sufficient reliability, simultaneous with the mounting of the ink jet recording head on the printer.
  • the use of an ordinary connector if employed for securing reliability, is impractical because of the bulkiness of the connecting part.
  • blister package often used for example for stationery goods may not be adequeate in terms of prevention of ink solidification and of electrostatic charge.
  • An object of the present invention is to provide a storage container not associated with the above-mentioned drawbacks.
  • the object of the present invention is to provide a storage container capable of satisfactorily preventing the ink solidification and the electrostatic damages required for the storage of the ink jet recording head.
  • Another object of the present invention is to provide a storage container capable of enabling prolonged storage under various circumferential conditions, particularly under a high temperature in the course of delivery from the manufacturer to the user and until the actual use by the user, and also providing sufficient safety against electrostatic destruction.
  • Still another object of the present invention is to provide a storage container of a low cost, enabling confirmation of the interior thereof.
  • a storage container for the ink jet recording head composed of a member having a recessed portion for accommodating the ink jet recording head and a plate-shaped member adherable thereto, wherein either or both of said members are composed of a material with a volume resistivity not exceeding 1010 ⁇ .cm at least in a portion thereof in contact with the ink jet recording head, either or both of said members are transparent or partially transparent and both members have permeability to nitrogen not exceeding 0.5 cc.mm/cm2.sec.cm2Hg.1010 at 25° to 30°C.
  • the storage container of the present invention composed of the material of the above-mentioned physical properties can prevent solidification of ink, also can effectively protect the ink jet recording head from electrostatic destruction and enables confirmation of the content.
  • the recessed member and the plate-shaped member constituting the storage container of the present invention may be composed of a single material, or a multi-­layered structure of different materials.
  • either or both of said members have to be composed of a material of a volume resistivity not exceeding 1010 ⁇ .cm at least in a portion thereof in contact with the ink jet recording head, namely the internal wall of the storage container. This is because an insulating materials with volume resistivity exceeding 1010 ⁇ .cm tends to generate electrostatic charge by friction, contact, peeling or corona discharge.
  • the present inventors proved that the solidification of ink by drying can be prevented if both members have nitrogen permeability not exceeding 0.01 cc.mm/cm2.sec.cmHg.1010, preferably not exceeding 0.2 cc.mm/cm2.sec.cmHg.1010.
  • nitrogen permeability not exceeding 0.01 cc.mm/cm2.sec.cmHg.1010, preferably not exceeding 0.2 cc.mm/cm2.sec.cmHg.1010.
  • Such requirement can be satisfied for example by the use of vinylidene chloride, polyamide, polyethylene terephthalate or chlorinated rubber.
  • the gas barrier property can be improved, even if the permeability of the main component exceeds. 0.2 cc.mm/cm2.sec.cmHg.1010, by dispersing fine solid particles such as calcium powder when the member is composed of a single layer, or vacuum evaporating a layer of metal such as aluminum or copper or laminating a foil of such metal when the member is composed of plural layers.
  • the thickness of the members of the storage container should be in a range from 0.01 to 10 mm in consideration of mechanical strength and molding property, preferably 0.01 to 5 mm, and most preferably 0.1 to 2 mm. Said thickness may be suitably selected within the above-­mentioned range in consideration of the material employed and the form of the container, and two members may have same or different thicknesses.
  • either or both of the members of the storage container are provided with projecting parts on the internal wall thereof, thereby the discharge ports of the ink jet recording head can be prevented from damage by contact with the internal wall of the storage container, or ink leakage, even in case the storage container, containing the ink jet recording head, is dropped or subjected to vibration.
  • At least one of the members has to be transparent or transparent in part.
  • Such transparency in part can be obtained, for example if the plate-shaped member is composed of plural layers, by employing a transparent layer and another opaque layer which is cut out corresponding to the recessed portion.
  • the storage container of the present invention is not limited to the structures or form explained above or to be explained later, but is subject to various modifications within the scope and spirit of the appended claims.
  • the ink jet recording head 110 is provided with discharge ports 111, and electrical terminals 112 for supplying electrical energy to energy generating elements (heat generating elements or piezoelectric elements) for discharging ink from the discharge ports.
  • energy generating elements heat generating elements or piezoelectric elements
  • the ink jet recording head 110 is further provided with an ink tank for storing ink to be discharged from the discharge ports 110.
  • Fig. 1 is a schematic external view showing the basic structure of the storage container for the ink jet recording head, of the present invention.
  • the storage container shown in Fig. 1 comprises a recessed member 3 molded as a box-shaped container and having an adhesion face 2 at the upper edge thereof, and a plate-shaped member 6 to be adhered to said adhesion plane 2 for closing the aperture of said recessed member 3.
  • Fig. 2 shows the recessed member alone in a schematic perspective view
  • Fig. 3 shows the plate-shaped member 6 alone in a shematic perspective view.
  • the recessed members and the plate-shaped members shown in Figs. 1 to 3 were prepared and subjected to storage test and electrostatic destruction test in the following manner, with the ink jet recording test shown in Fig. 6 sealed therein.
  • a transparent sheet of a thickness of 0.5 mm of thermoplastic acrylonitrile resin (Zacron supplied by Sohio Chemical Corp.) was formed as shown in Fig. 1 by deep drawing so as to have a recess 1 of an area of 35 x 55 mm and a depth of 25 mm, and an adhesion area 2 of a width of 10 mm, with an overall thickness of 0.4 mm.
  • the plate-shaped member 6 was composed, as shown in Fig. 3, of cardboard 4 of a thickness of 0.5 mm on which an aluminum foil of a thickness of 0.1 mm was adhered and which was cut into a size of 85 x 85 mm.
  • the recessed member for accommodating the ink jet recording head was composed of an aluminum plate of a thickness of 0.1 mm, deep drawn in the same form as in the Example 1.
  • the plate-shaped member was composed of a transparent Zacron sheet of a thickness of 0.5 mm, cut into a size of 85 x 85 mm.
  • the recessed member for accommodating the ink jet recording head was composed of an aluminum plate of a thickness of 0.1 mm, deep drawn in the same form as in the Example 1.
  • the plate-shaped member 3′ was composed, as shown in Fig. 4, of a transparent Zacron sheet 8 of a thickness of 0.5 mm, which was cut into a size of 85 x 85 mm and on which adhered was an aluminum foil 5′ of a thickness of 0.1 mm with a circular hole of a diameter of 40 mm.
  • a recessed member for accommodating the ink jet recording head was formed by deep drawing a transparent sheet of a thickness of 0.5 mm of thermoplastic acrylonitrile resin (Zacron supplied by Sohio Chemical Corp.) to obtain a molded article with a thickness of 0.4 mm, a recess of an area of 35 x 55 mm and a depth of 25 mm and an adhesion area of a width of 10 mm.
  • thermoplastic acrylonitrile resin Zacron supplied by Sohio Chemical Corp.
  • the plate-shaped member was composed of a transparent Zacron sheet of a thickness of 0.5 mm, cut into a size of 85 x 85 mm.
  • the Skytough T paint employed herein is transparent, so that the transparency was not altered by dip coating.
  • the coating had a thickness of about 2 ⁇ m, and a volume resistivity of about 1 x 1010 ⁇ .cm.
  • Both members were prepared with Zacron as in the Example 4, and coated with Skytough T by spraying instead of dipping.
  • the coating had a thickness of ca. 2 ⁇ m and a vloume resistivity of ca. 1 x 1011 ⁇ .cm.
  • Containers in which the ink jet recording heads were sealed were placed in a dry oven of 60°C, and were opened at different times.
  • the ink jet recording head taken out from the container was mounted on a printer and the state of printing was observed.
  • the ink solidification was estimated from the quality of obtained print.
  • the container was subjected to a discharge of 15kV while one of the members constituting the container (conductive one in the Examples, but not specified in the Reference Examples) is grounded. Thereafter the ink jet recording head was taken out from the container and mounted on a printer, and the state of printing was observed.
  • Table 1 Material of recessed member Material of plate shaped member Storage stability test 15kV static destruction test 1 wk 1 month 3 months
  • Example 1 Zacron Paper-Al + + + + + Example 2 Al Zacron + + + + + Example 3 Al Zacron + Al (holed) + + + + + + Example 4 Zacron + Skytough T Zacron + Skytough T + + + + + + Example 5 Al Vinylidene + + + + + Example 6 Zacron + Skytough T Vinylidene chloride + + + + + Ref.
  • the containers of the Examples showed satisfactory results both tests.
  • the containers employing polyvinyl chloride as in the Reference Examples 1 to 3 showed poor stability after 1 month, exhibiting ink deposition at the front end portion of the discharge ports of the ink jet recording head.
  • the container showing the volume resistivity higher than 1 x 1011 ⁇ .cm, as in the Reference Example 4 did not have enough durability against electrostatic destruction.
  • the plate-shaped member in the Example 2 was modified as a member 6 ⁇ shown in Fig. 7, with projections 9.
  • projections 9 were so provided as to engage with the recess of the recessed member 3, and said recessed member 3 and the member 6 ⁇ were adhered in the same manner as explained before. Said projections may be formed separately or integrally.
  • Such structure supressed the movement of the ink jet recording head in the container even when it was subjected to an external force such as dropping or vibration, and protected the discharge ports 111 of the head 110 from contacting the internal wall of the container, thereby preventing damage to the discharge ports or ink leakage.
  • the storage container of the present invention for the ink jet recording head enables prolonged storage under various circumferential conditions, particularly under high temperature, in the course of delivery from the manufacturer to the user, and provides considerable safety against unpredictable electrostatic destruction, thereby improving the reliability of the recording head. It is also rendered possible to provide an inexpensive storage container with inexpensive materials, allowing to confirm the content of the container.
  • the storage container of the present invention is usable not only for the ink jet recording head with the ink tank as explained above, but also for the ink jet recording head only.
  • a storage container for an ink jet recording head consisting of a part having a box-shaped recess for housing the recording head, and another plate-shaped part for converting the aperture of the recessed part.
  • the recessed part and/or the plate-­shaped part has volume resistivity not exceeding 1010 ⁇ .cm at least in a portion in contact with the ink jet recording head, and is transparent totally or in part, and both member have nitrogen permeability not 0.5 cc.mm/cm2.sec.cmHg.1010.
  • the container serves to prevent solidification of ink and electrostatic destruction during storage of the recording head.

Landscapes

  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP19900100653 1989-01-13 1990-01-12 Vorratsbehälter Expired - Lifetime EP0378241B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP747389A JPH02187341A (ja) 1989-01-13 1989-01-13 インクジェットヘッドの保存容器
JP7473/89 1989-01-13

Publications (3)

Publication Number Publication Date
EP0378241A2 true EP0378241A2 (de) 1990-07-18
EP0378241A3 EP0378241A3 (en) 1990-12-05
EP0378241B1 EP0378241B1 (de) 1995-06-14

Family

ID=11666757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900100653 Expired - Lifetime EP0378241B1 (de) 1989-01-13 1990-01-12 Vorratsbehälter

Country Status (3)

Country Link
EP (1) EP0378241B1 (de)
JP (1) JPH02187341A (de)
DE (1) DE69019995T2 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423374A1 (de) * 1989-05-01 1991-04-24 Canon Kabushiki Kaisha Behälter mit tintenstrahldruckkopfpatrone
EP0523635A1 (de) * 1991-07-15 1993-01-20 Canon Kabushiki Kaisha Tintenbehälter mit Belüftungsabschnitt und Aufzeichnungskopf
EP0523637A1 (de) * 1991-07-15 1993-01-20 Canon Kabushiki Kaisha Verpackung für eine Tintenstrahlpatrone
EP0603473A2 (de) * 1992-12-22 1994-06-29 Hewlett-Packard Company Thermische Tintenstrahlfeder mit einer Plastik/Metall-Befestigung für die Hülle
EP0605385A2 (de) * 1989-09-18 1994-07-06 Canon Kabushiki Kaisha Aufzeichnungskopf mit Abdeckung
CN103373092A (zh) * 2012-04-17 2013-10-30 北京联合大学 一种印刷设备污染防护装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2288688A1 (fr) * 1974-10-23 1976-05-21 Cifot Boite pour le conditionnement et la protection d'un objectif photographique ou cinematographique
US4345262A (en) * 1979-02-19 1982-08-17 Canon Kabushiki Kaisha Ink jet recording method
FR2575413A1 (fr) * 1984-12-28 1986-07-04 Canon Kk Appareil d'enregistrement par jets d'encre
EP0342930A2 (de) * 1988-05-17 1989-11-23 MITSUI TOATSU CHEMICALS, Inc. Behälter für Wafer mit integriertem Schaltkreis und Verfahren zu dessen Bereitstellung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2288688A1 (fr) * 1974-10-23 1976-05-21 Cifot Boite pour le conditionnement et la protection d'un objectif photographique ou cinematographique
US4345262A (en) * 1979-02-19 1982-08-17 Canon Kabushiki Kaisha Ink jet recording method
FR2575413A1 (fr) * 1984-12-28 1986-07-04 Canon Kk Appareil d'enregistrement par jets d'encre
EP0342930A2 (de) * 1988-05-17 1989-11-23 MITSUI TOATSU CHEMICALS, Inc. Behälter für Wafer mit integriertem Schaltkreis und Verfahren zu dessen Bereitstellung

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0423374A1 (de) * 1989-05-01 1991-04-24 Canon Kabushiki Kaisha Behälter mit tintenstrahldruckkopfpatrone
EP0423374B1 (de) * 1989-05-01 1996-01-03 Canon Kabushiki Kaisha Behälter mit tintenstrahldruckkopfpatrone
EP0605385A2 (de) * 1989-09-18 1994-07-06 Canon Kabushiki Kaisha Aufzeichnungskopf mit Abdeckung
EP0605385A3 (de) * 1989-09-18 1994-12-28 Canon Kk Aufzeichnungskopf mit Abdeckung.
US5850238A (en) * 1989-09-18 1998-12-15 Canon Kabushiki Kaisha Recording head with cover
EP0523635A1 (de) * 1991-07-15 1993-01-20 Canon Kabushiki Kaisha Tintenbehälter mit Belüftungsabschnitt und Aufzeichnungskopf
EP0523637A1 (de) * 1991-07-15 1993-01-20 Canon Kabushiki Kaisha Verpackung für eine Tintenstrahlpatrone
US5279410A (en) * 1991-07-15 1994-01-18 Canon Kabushiki Kaisha Package for ink jet cartridge
US5629728A (en) * 1991-07-15 1997-05-13 Canon Kabushiki Kaisha Ink container having atmosphere communicating section and recording head
EP0603473A2 (de) * 1992-12-22 1994-06-29 Hewlett-Packard Company Thermische Tintenstrahlfeder mit einer Plastik/Metall-Befestigung für die Hülle
EP0603473A3 (de) * 1992-12-22 1997-10-15 Hewlett Packard Co Thermische Tintenstrahlfeder mit einer Plastik/Metall-Befestigung für die Hülle.
CN103373092A (zh) * 2012-04-17 2013-10-30 北京联合大学 一种印刷设备污染防护装置

Also Published As

Publication number Publication date
EP0378241B1 (de) 1995-06-14
JPH02187341A (ja) 1990-07-23
DE69019995D1 (de) 1995-07-20
DE69019995T2 (de) 1995-12-07
EP0378241A3 (en) 1990-12-05

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