WO1994029110A1 - Tete d'impression du type a jet d'encre - Google Patents

Tete d'impression du type a jet d'encre Download PDF

Info

Publication number
WO1994029110A1
WO1994029110A1 PCT/JP1994/000871 JP9400871W WO9429110A1 WO 1994029110 A1 WO1994029110 A1 WO 1994029110A1 JP 9400871 W JP9400871 W JP 9400871W WO 9429110 A1 WO9429110 A1 WO 9429110A1
Authority
WO
WIPO (PCT)
Prior art keywords
nozzle
recording head
ink jet
nozzles
ink
Prior art date
Application number
PCT/JP1994/000871
Other languages
English (en)
Japanese (ja)
Inventor
Tomoaki Abe
Kazuo Koshino
Original Assignee
Seiko Epson Corporation
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 Seiko Epson Corporation filed Critical Seiko Epson Corporation
Priority to EP94916426A priority Critical patent/EP0653304B1/fr
Priority to DE69417347T priority patent/DE69417347T2/de
Priority to JP52469394A priority patent/JP3418986B2/ja
Publication of WO1994029110A1 publication Critical patent/WO1994029110A1/fr

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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14201—Structure of print heads with piezoelectric elements
    • B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
    • 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
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • B41J2/15—Arrangement thereof for serial printing
    • 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
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/51—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements serial printer type
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14387—Front shooter

Definitions

  • the present invention relates to an on-demand ink jet recording head for ejecting ink droplets in response to a print signal to form an ink image on a recording medium such as recording paper, and more particularly to an on-demand ink jet recording head.
  • the present invention relates to an arrangement of nozzles for discharging ink droplets and a shape of an ink chamber.
  • the nozzles are arranged on a plurality of oblique straight lines as shown in FIG. By arranging them in a zigzag pattern, print quality is improved regardless of the mounting dimensional accuracy.
  • the pitch between each nozzle must be adjusted. It must be narrowed, that is, the angle ⁇ must be reduced, but the angle is substantially restricted in order to prevent the occurrence of crosstalk and the like due to interference between the ink chambers at the bent part.
  • the penetration depth of the ink differs between the recorded image at the bent portion and the recorded image at the peripheral portion, and the recorded image at the entire portion as shown in FIG. A plurality of unevenness was generated.
  • the present invention provides a high-density, high-density printing
  • the purpose is to provide an integrated jet record head.
  • DISCLOSURE OF THE INVENTION The ink jet recording head of the present invention is arranged such that nozzles for ejecting ink droplets are arranged substantially along a V-shaped line opened in the main scanning direction of the recording head.
  • the nozzles are arranged substantially along the combination line of the diagonal line segment opened in the main scanning direction, and at least one of the nozzles along the adjacent diagonal line segment is oblique.
  • the feature is that the nozzles along are shifted in the main scanning direction.
  • FIG. 1 is an explanatory diagram showing the nozzle arrangement and the ink chamber arrangement of the ink jet recording head of the present invention.
  • FIG. 2 is a diagram showing a printing state of the first embodiment of the present invention.
  • FIG. 3 is an enlarged view of a part of the nozzle according to the first embodiment of the present invention.
  • FIG. 4 is a graph showing a pixel displacement according to the first embodiment of the present invention.
  • FIG. 5 is a perspective view for explaining a mounting state of the ink jet recording head of the present invention.
  • FIG. 6 is a perspective view showing a transport mechanism of the ink jet recording head of the present invention.
  • FIG. 7 is a diagram showing a print pattern according to the first embodiment of the present invention.
  • FIG. 8 is a view showing an ink jet recording head according to another embodiment of the present invention.
  • FIG. 9 is a view showing an ink jet recording head according to another embodiment of the present invention.
  • FIG. 10 is a view showing an ink jet recording head according to another embodiment of the present invention.
  • FIG. 11 is a diagram for explaining the ink jet recording head of the present invention.
  • FIG. 12 is a diagram for explaining a conventional nozzle arrangement and an ink chamber arrangement.
  • FIG. 13 is a diagram illustrating a printing state according to the related art.
  • BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the accompanying drawings.
  • FIG. 1 is an explanatory diagram of the nozzle and ink chamber arrangement of an ink jet recording head according to one embodiment of the present invention.
  • the recording head of this embodiment includes nozzles 190 to 197 for ejecting ink droplets, and ink chambers 170 to 177 communicating with the nozzles. .
  • each room has an ink chamber that communicates with a total of 64 nozzles in a row.
  • the nozzles are spaced at regular intervals along lines L1 and L2, which are straight lines inclined in the direction opposite to the X direction, which is the main scanning direction (moving direction when the carriage is mounted). Are located.
  • This line segment is inclined so that the pitch P1 of each nozzle in the sub-scanning direction becomes 1360 inch ⁇ 3 ⁇ 4, and line segment L1 and line segment L2 are almost V-shaped. It is formed in a shape.
  • the ink chambers are arranged outside the V-shape formed by the line segments L 1 and L 2, and the width d 4 of each ink chamber is 450 ⁇ m, which is sufficient. It is formed wide enough to obtain the discharge rate and 150 m deep to ensure ink flow characteristics.
  • a piezoelectric element is attached to a vibration plate that forms a wall of the ink chamber, or a piezoelectric element is printed on a gripping plate.
  • a product formed by firing can be used.
  • the nozzles are arranged in a V-shape, so that the recording head described in Japanese Patent Application Laid-Open No. HEI 4-3125859 has a light and shade.
  • the problem of multiple unevenness was reduced to a point where the print density was high only at the center of the nozzle 192 near the center, and the density was uniform near the nozzle 199 at the end.
  • Transform This makes it possible to suppress density unevenness to a minimum at one location over the entire printing width b. As a result, even when a bite image such as graphics is recorded by using the recording head of the present embodiment, high quality output is possible without deteriorating the texture.
  • FIG 3 shows a partially enlarged view of the bent portion where the nozzle is shifted.
  • the nozzle row along the line segment L2 is shifted by 2.5 nozzles in one X direction from the nozzle row along the line segment L1, so that the line segment L1 A nozzle 191 along L2 is arranged at a position of dl / 2 between the nozzle 193 and the nozzle 194.
  • the large size makes it possible to obtain sufficient rigidity of the wall between the ink chambers 17 1 and 17 4, and to eliminate adverse effects on ink discharge such as crosstalk. .
  • the basic timing in the main scanning direction can be obtained directly from the linear encoder output arranged in the same direction or the pulse number of the stepping motor for driving the recording head. In this embodiment, with such a configuration, high printing quality is achieved by accurately forming pixels even from nozzle groups shifted in the main scanning direction without adding a special timing generation mechanism. did.
  • the shape of the ink chamber near the nozzle is not formed by a simple curved surface of R, but the vicinity of the nozzle is formed by a smaller curved surface of R.
  • the distance can be made wider, interference such as crosstalk can be more reliably eliminated, and bubbles can be discharged by gradually decreasing the radius of the curved surface near the nozzle. It also has an excellent effect on properties.
  • the distance from the center to the outer shape of the ink chamber 1 74 r 1 1 0 O
  • the recording head according to the present invention is unlikely to cause a decrease in printing quality due to an attachment error or the like. This will be described in detail below.
  • the printing pitch P 1 in the present embodiment is 1/360 inch-70. 6> um, taking into account that the recording medium is completely covered,
  • the diameter of the pixel is desirably about 100 to 12 Ozm. With this pixel size, the displacement of the 20 to 30 ju pixel is visually perceived, and causes a reduction in print quality.
  • the recording head of the present invention has a problem in mounting accuracy to a carriage in an ink jet recording apparatus configured so that the user can easily replace the recording head for the above-described reason. It can be easily implemented without any problems.
  • Such a recording device can be easily mounted even if it is a recording device composed of a simple support mechanism such as an arm 360 and a pin 361, as shown in FIG.
  • This recording apparatus moves the recording head 9 in the main scanning direction (X direction in the figure) relative to the recording medium while ejecting ink droplets 50 from the nozzle 190 and the like.
  • Recording media 1 Form a pixel on top. After the pixel formation in the main scanning direction is completed in this way, the recording medium 1 is transported in the sub-scanning direction (the y direction in the figure) perpendicular to the main scanning direction, and then the main scanning direction ( Recording proceeds in the process of forming pixels in the (X direction in the figure).
  • the conveyance of the recording head is performed by driving the belt 6 via the pulley 5 by the steering motor 10 as shown in FIG. Even if an error occurs in the feed amount in the main scanning direction due to the eccentricity of the pulley 1-5, the vibration of the belt 6, or the expansion and contraction due to the external environment, printing using the recording head of this embodiment is shown in FIG. Since the pattern is smooth and continuous, there is an advantage that high-quality printing can be provided without visually conspicuous disturbance such as vertical lines.
  • FIG. 8 shows another embodiment of the present invention.
  • the present embodiment is characterized in that a part of the nozzle (nozzle 192 in the figure) along the oblique line segment L 1 is shifted in the main scanning direction (X direction in the figure).
  • the image formed by the nozzles 192 is dry, so that partial collection of ink droplets can be prevented and density unevenness at the center of printing can be further suppressed.
  • the nozzles 19 2 are shifted, but if a plurality of nozzles are shifted, the effect of density unevenness is further increased.
  • FIG. 9 shows another embodiment of the present invention.
  • the nozzle array is configured so as to be along a plurality of line segments LI, L2, L3, and L4.
  • black is assigned to L1
  • cyan is assigned to L2
  • cyan is assigned to L3.
  • Magenta and L4 are assigned different colors like yellow. Separate L1 and L2, L3 and L4 in the main scanning direction (x direction), and separate nozzles 190 and 91 and nozzles 1992 and 1993. As a result, the ink of another color flows into the nozzles 190, 191, 192, 193 to prevent color mixing and smearing.
  • FIG. 10 shows another embodiment of the present invention.
  • This recording head is formed in a diamond shape by combining two V-shaped nozzle arrangements. According to this nozzle arrangement, when printing in the main scanning direction, one V-shaped nozzle performs thinned-out printing, and then records with another V-shaped nozzle so as to fill the gap. Problems such as ink bleeding Can be resolved.
  • the structure of the ink jet recording head for realizing the above-described ink jet recording head of the present invention is a stacked ink jet head as shown in FIG.
  • a ceremony record head is preferably used.
  • the flow path from the ink chamber 17 to the nozzle 2 can be easily shifted gradually from the flow path in which the nozzles 2 are stacked. Since the position can be shifted to the outside of the ink chamber from the end of the ink chamber 17, the position of the ink chamber can be lower than the position of the nozzle.
  • the distance between adjacent ink chambers can be more sufficiently increased, and crosstalk can be reduced.
  • ink is supplied from a common ink chamber 11 to an ink chamber 17, and a diaphragm 19 laminated on the ink chamber 17 is pressurized by a piezoelectric element 20.
  • the nozzle 2 is configured to be discharged from the nozzle 2 through the flow path.
  • recording can be performed at a high recording density, printing unevenness is suppressed, and recording quality is not affected by mounting errors, and highly integrated ink jet recording is performed. Can be provided. Industrial applicability
  • the ink jet recording head of the present invention is suitable for use in a recording device such as a printer, a facsimile, and a copying machine.

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

Les buses (190 à 197) destinées à la projection de gouttelettes d'encre sont disposées selon deux segments (L1 et L2) en ligne divergeant selon des sens opposés par rapport à la direction principale de balayage. La chute de la qualité d'impression et les interférences dans la chambre d'encre peuvent être résolues pourvu que les deux segments forment un V. Ainsi, la présente invention propose une tête d'impression de type à jet d'encre permettant d'obtenir une haute densité ainsi qu'une qualité élevée d'impression.
PCT/JP1994/000871 1993-06-03 1994-05-31 Tete d'impression du type a jet d'encre WO1994029110A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP94916426A EP0653304B1 (fr) 1993-06-03 1994-05-31 Tete d'impression du type a jet d'encre
DE69417347T DE69417347T2 (de) 1993-06-03 1994-05-31 Aufzeichnungskopf nach der tintenstrahlart
JP52469394A JP3418986B2 (ja) 1993-06-03 1994-05-31 インクジェット式記録ヘッド

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP13363193 1993-06-03
JP5/133631 1993-06-03

Publications (1)

Publication Number Publication Date
WO1994029110A1 true WO1994029110A1 (fr) 1994-12-22

Family

ID=15109340

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1994/000871 WO1994029110A1 (fr) 1993-06-03 1994-05-31 Tete d'impression du type a jet d'encre

Country Status (4)

Country Link
EP (1) EP0653304B1 (fr)
JP (1) JP3418986B2 (fr)
DE (1) DE69417347T2 (fr)
WO (1) WO1994029110A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6033058A (en) * 1995-06-27 2000-03-07 Seiko Epson Corporation Actuator for an ink jet print head of the layered type with offset linear arrays of pressure generating chamber

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09272205A (ja) * 1996-04-04 1997-10-21 Seiko Epson Corp 積層型インクジェット式記録ヘッド
US6220698B1 (en) 1996-07-26 2001-04-24 Seiko Epson Corporation Ink jet type recording head
DE69718568T2 (de) * 1996-07-26 2003-05-22 Seiko Epson Corp Aufzeichnungskopf des Tintenstrahltyps
JP5871738B2 (ja) * 2011-09-13 2016-03-01 東芝テック株式会社 インクジェットヘッドおよびインクジェット記録装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57212074A (en) * 1981-06-24 1982-12-27 Fujitsu Ltd Printing head

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907080A1 (de) * 1989-03-04 1990-09-06 Philips Patentverwaltung Matrixdrucker
JPH03169656A (ja) * 1989-11-30 1991-07-23 Internatl Business Mach Corp <Ibm> 印刷装置
JP3045193B2 (ja) * 1991-04-11 2000-05-29 セイコーエプソン株式会社 インクジェット記録ヘッド

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57212074A (en) * 1981-06-24 1982-12-27 Fujitsu Ltd Printing head

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0653304A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6033058A (en) * 1995-06-27 2000-03-07 Seiko Epson Corporation Actuator for an ink jet print head of the layered type with offset linear arrays of pressure generating chamber

Also Published As

Publication number Publication date
JP3418986B2 (ja) 2003-06-23
DE69417347T2 (de) 1999-11-04
EP0653304A4 (fr) 1995-07-26
DE69417347D1 (de) 1999-04-29
EP0653304B1 (fr) 1999-03-24
EP0653304A1 (fr) 1995-05-17

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