EP0778149A2 - Farbstrahldrucker für heissschmelzende Tinte und Aussstoss von Tintentröpfchen mit optimaler Menge - Google Patents

Farbstrahldrucker für heissschmelzende Tinte und Aussstoss von Tintentröpfchen mit optimaler Menge Download PDF

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Publication number
EP0778149A2
EP0778149A2 EP96308894A EP96308894A EP0778149A2 EP 0778149 A2 EP0778149 A2 EP 0778149A2 EP 96308894 A EP96308894 A EP 96308894A EP 96308894 A EP96308894 A EP 96308894A EP 0778149 A2 EP0778149 A2 EP 0778149A2
Authority
EP
European Patent Office
Prior art keywords
ink
hot melt
recording paper
recording
range
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96308894A
Other languages
English (en)
French (fr)
Other versions
EP0778149A3 (de
Inventor
Shogo c/o Brother Kogyo Kabushiki Kaisha Suzuki
Mikio c/o Brother Kogyo Kabushiki Kaisha Sakuma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP34557895A external-priority patent/JPH09156092A/ja
Priority claimed from JP34557695A external-priority patent/JPH09156090A/ja
Priority claimed from JP34557795A external-priority patent/JPH09156091A/ja
Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Publication of EP0778149A2 publication Critical patent/EP0778149A2/de
Publication of EP0778149A3 publication Critical patent/EP0778149A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2121—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter
    • B41J2/2128—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter by means of energy modulation
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0024—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using conduction means, e.g. by using a heated platen
    • B41J11/00244—Means for heating the copy materials before or during printing

Definitions

  • a hot melt ink jet printer which includes an ink jet head for ejecting an ink droplet onto a recording paper; and a paper feed unit for feeding the recording paper. Dots with a recording density more than 600 dpi by 600 dpi are printed on the recording paper by a combination of the ink jet head and the paper feed unit. A quantity of an ink droplet ejected by the ink jet head is determined so that an ink clinging amount on a unit area of the recording paper is in a range from 7.2 ⁇ 10 6 to 2.1 ⁇ 10 7 pl/inch 2 when the dots are printed in an overall area of the unit area.
  • the heating means is a plate-shaped member.
  • the plate-shaped member is disposed so that the surface thereof is in facial contact with the recording paper.
  • a heating temperature of the heating means is set to a temperature for melting the hot melt ink.
  • the ink jet head 12 includes a head portion 15 for ejecting hot melt ink; and a tank portion 16 for storing ink to be supplied to the head portion 15.
  • a piezoelectric element for ejecting ink by changing volume of an ink-filled ink chamber is provided in the head portion 15.
  • a heater portion 18 for maintaining the hot melt ink in a melted condition is also provided in the head portion 15.
  • another heater portion for performing the same function as the heater portion 18 is also provided in the tank portion 16. The heater portions enable ejecting the hot melt ink in a liquid condition.
  • each of the tank portion 16 and the head portion 15 is partitioned into four chambers R1 through R4. Hot melt inks of four primary colors are introduced into the respective chambers.
  • the inks of four primary colors are made from a mixture of colorants (2% in mixture ratio) of black (B), yellow (Y), magenta (M) and cyan (C) which is a half tone of blue and green, a paraffin wax (85% in mixture ratio), and ethylene-vinylacetate copolymer (13% in mixture ratio).
  • a color recording image is formed by the four primary color inks ejected from the corresponding nozzles 15b formed in the respective chambers of the heat portion 15.
  • FIG. 2(a) An arrangement of the print mechanism 11 as shown in Fig. 2(a) is provided in the HMI jet printer according to the first embodiment.
  • the arrangement shown in Fig. 2(a) includes a head driving section 43 for applying a drive signal to the driving element (piezoelectric element, not shown) of the ink jet head 12, and a control section 40 for controlling the drive signal output from the head driving section 43 or changing the driving voltage of the drive signal.
  • a desired quantity of ink In order to eject an ink droplet of a desired quantity, an operator inputs a desired quantity of ink to the control section 40.
  • the control section 40 computes a driving voltage based on the inputted quantity of ink for applying to the head driving section 43.
  • the HMI jet printer with such an arrangement is capable of setting a quantity of ink droplet in a range from 10 to 70 pl.
  • Table 2(a) shows the results of experiments for 720 by 720 dpi and 900 by 900 dpi recording densities performed in the same manner as described above.
  • the reason for setting the vertical and horizontal recording densities to the same value in the above instances is that almost all the popular ink jet printers have a main mode having the same recording density in the vertical and horizontal directions and that there is a high demand from the users to adopt this mode.
  • a drop quantity per one dot is computed based on the ink clinging amount ranging from 1.0 ⁇ 10 7 through 1.7 ⁇ 10 7 pl/inch 2 .
  • a value falling within this range, for example, 20 dl, is selected as the drop quantity per one droplet, and the drive voltage is set so that the drop quantity thus selected can be ejected from the nozzle.
  • the HMI jet printer according to the second embodiment is similar to that shown in Figs. 1(a) and 2(a) according to the first embodiment, the difference being in the provision of a pair of pressing rollers 30 serving as pressing means.
  • the pair of pressing rollers 30 is disposed below the ink jet head 12 and at the terminal end of the transport pathway 7 so as to nip the recording paper 20 between the rollers 30.
  • the ink droplet clinging to the recording paper 20 is in a dome shaped configuration before the recording paper 20 passes through the nip between the pressing rollers 30.
  • a drop quantity per one dot is computed based on the ink clinging amount ranging from 9.0 ⁇ 10 6 through 1.6 ⁇ 10 7 pl/inch 2 .
  • 9.0 ⁇ 10 6 /800 2 14.1 pl
  • 1.6 ⁇ 10 7 /800 2 25.0 pl Therefore, it can be appreciated that the optimum range of the drop quantity is from 14.1 to 25.0 pl.
  • a value falling within this range, for example, 20 dl, is selected as the drop quantity per one droplet, and the drive voltage is set so that the drop quantity thus selected can be ejected from the nozzle.
  • the HMI jet printer according to the third embodiment is similar to that shown in Figs. 1(a) and 2(a) according to the first embodiment, the difference being in the provision of a plate-shaped heating platen 40.
  • the heating platen 40 is disposed immediately below the ink jet head 12 so as to confront the nozzle surface 15e.
  • the heating platen 40 is disposed along the transport pathway 7 so as to be in facial contact with the surface of the recording paper 20.
  • the heating temperature of the heating platen 40 is set to 40'C or above 40°C. The hot melt ink is melted when heated up to this temperature.
  • optimum drop quantity differs depending on the recording density.
  • the drop quantity is converted to an ink clinging amount per one square inches when its overall area is recorded with ink.
  • the ink clinging amount in a range from 5.4 ⁇ 10 6 through 1.7 ⁇ 10 7 pl/inch 2 provides an allowable range of recording quality regardless of the recording density.
  • Table 2(c) indicates that the recording quality is excellent when the ink clinging amount is set in a range from 7.2 ⁇ 10 6 through 1.3 ⁇ 10 7 pl/inch 2 .
  • the arrangement of the control section shown in Fig. 2(a) is set to determine the ejection timing so that the recording density becomes 800 by 800 dpi. Also, the control section 40 controls the head driving section 43 so that the latter section outputs the driving signal set as described above to the driving element.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
EP96308894A 1995-12-07 1996-12-09 Farbstrahldrucker für heissschmelzende Tinte und Aussstoss von Tintentröpfchen mit optimaler Menge Withdrawn EP0778149A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP34557895A JPH09156092A (ja) 1995-12-07 1995-12-07 ホットメルトインクジェットプリンタ
JP345577/95 1995-12-07
JP345578/95 1995-12-07
JP34557695A JPH09156090A (ja) 1995-12-07 1995-12-07 ホットメルトインクジェットプリンタ
JP34557795A JPH09156091A (ja) 1995-12-07 1995-12-07 ホットメルトインクジェットプリンタ
JP345576/95 1995-12-07

Publications (2)

Publication Number Publication Date
EP0778149A2 true EP0778149A2 (de) 1997-06-11
EP0778149A3 EP0778149A3 (de) 1998-06-10

Family

ID=27341197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96308894A Withdrawn EP0778149A3 (de) 1995-12-07 1996-12-09 Farbstrahldrucker für heissschmelzende Tinte und Aussstoss von Tintentröpfchen mit optimaler Menge

Country Status (1)

Country Link
EP (1) EP0778149A3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790421A1 (fr) * 1999-03-01 2000-09-08 Gemplus Card Int Machine d'impression graphique pour support de memorisation de type carte, procede d'impression graphique desdits supports de memorisation et supports de memorisation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0698823B2 (ja) * 1986-12-24 1994-12-07 キヤノン株式会社 インクジェット記録方法
KR920010635B1 (ko) * 1988-06-03 1992-12-12 스펙트라, 인코포레이티드 열용융 잉크젯트 인쇄시스템
JPH0262275A (ja) * 1988-08-30 1990-03-02 Brother Ind Ltd 記録装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790421A1 (fr) * 1999-03-01 2000-09-08 Gemplus Card Int Machine d'impression graphique pour support de memorisation de type carte, procede d'impression graphique desdits supports de memorisation et supports de memorisation
WO2000051818A1 (fr) * 1999-03-01 2000-09-08 Gemplus Machine d'impression graphique pour support de memorisation de type carte, procede d'impression graphique desdits supports de memorisation et supports de memorisation
US7286257B1 (en) 1999-03-01 2007-10-23 Gemplus Graphic printing machine for card-type storage medium, method for printing said storage media and storage media

Also Published As

Publication number Publication date
EP0778149A3 (de) 1998-06-10

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