JPH01110964A - Electrostatic type ink-jet recording apparatus - Google Patents
Electrostatic type ink-jet recording apparatusInfo
- Publication number
- JPH01110964A JPH01110964A JP27110787A JP27110787A JPH01110964A JP H01110964 A JPH01110964 A JP H01110964A JP 27110787 A JP27110787 A JP 27110787A JP 27110787 A JP27110787 A JP 27110787A JP H01110964 A JPH01110964 A JP H01110964A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- recording
- electrodes
- electrode
- nozzle
- 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.)
- Pending
Links
- 230000005499 meniscus Effects 0.000 abstract description 13
- 150000002500 ions Chemical class 0.000 abstract description 10
- 230000005684 electric field Effects 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
-
- 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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/06—Ink jet characterised by the jet generation process generating single droplets or particles on demand by electric or magnetic field
- B41J2002/061—Ejection by electric field of ink or of toner particles contained in ink
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【発明の詳細な説明】
技拡分夏
本発明は、静電型インクジェット記録装置、より詳細に
は、静電型インクジェット記録装置のへラド部に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic ink jet recording apparatus, and more particularly to a spatula section of an electrostatic ink jet recording apparatus.
灸久皮帆
第４図は、従来の静電型インクジェット記録装置の一例
を示す斜視図で、図中、１１はスリット状に形成された
インクの供給口、１２ａ、１２ｂは前記供給口１１を形
成する絶縁体からなる上板および下板、１３は前記下板
１２ｂ上に多数配置された記録′北極、１４は前記供給
口１１に対向して配置された背面電極、１５は該背面電
極１４に沿って移動する記録紙、１６は前記記録電極１
３の選択された電極に高電圧を供給するＩ８１！勧電源
である。上記静電型、インクジェット記録装置において
は、インク供給口１１にインクを注入すると該インク供
給口に連続したメニスカスが形成され、記録電極１３の
選択された１つ以上の電極に駆動電源１６より高電圧が
供給されると、選択された記録電極付近のインクが背面
電極１４側に引張られ、前記インク供給口１１より噴出
し、背面電極１４の前面に設けられた記録紙１５に付着
して記録情報が印写される。Figure 4 is a perspective view showing an example of a conventional electrostatic inkjet recording device. An upper plate and a lower plate made of an insulator to be formed; 13, a recording north pole arranged in large numbers on the lower plate 12b; 14, a back electrode arranged opposite to the supply port 11; 15, the back electrode 14; a recording paper 16 moving along the recording electrode 1;
I81 to supply high voltage to selected electrodes of 3! It is a source of encouragement. In the electrostatic type or inkjet recording device described above, when ink is injected into the ink supply port 11, a continuous meniscus is formed in the ink supply port, and one or more selected electrodes of the recording electrode 13 are supplied with a voltage higher than the drive power supply 16. When a voltage is supplied, the ink near the selected recording electrode is pulled toward the back electrode 14, ejected from the ink supply port 11, and adheres to the recording paper 15 provided in front of the back electrode 14 for recording. The information is printed.
このように構成された静電型インクジェット記録装置で
は、インク供給口１１がスリット状である為、インクメ
ニスカスが均一に形成され、選択された記録電極付近の
インクを噴出するためには、高い電界、或いは長いパル
ス幅が必要であり、電源構成が複雑で、記録速度の向上
が図れないという欠点があった。In the electrostatic inkjet recording device configured in this way, since the ink supply port 11 is slit-shaped, an ink meniscus is formed uniformly, and a high electric field is required to eject ink near a selected recording electrode. Alternatively, there are disadvantages in that a long pulse width is required, the power supply configuration is complicated, and the recording speed cannot be improved.
一般に、静電型インクジェット記録装置において、噴射
効率を上げるには、インクメニスカスをいかに形成する
かが第１の要因となり、いかにして最小曲率のメニスカ
スをオリフィス先端に形成し、該メニスカスに背面電極
と記録電極により生じる電界強度を集束するかに関係し
ている。そのため、ヘッド部に振動子を設け、該振動子
によりスリット状開口部のインク液面上に凹凸を生じさ
せ、静電気力によるインクメニスカスの形成を助長し、
もしくは、この形成過程の短縮、省略を図るようにした
ものが提案されているが、この場合は、噴射がランダム
に発生するため、メニスカスに一定の凹凸を作ることは
難しく、また、記録電極との対応も難しかった。In general, in an electrostatic inkjet recording device, the first factor in increasing ejection efficiency is how to form an ink meniscus. and how to focus the electric field strength generated by the recording electrode. Therefore, a vibrator is provided in the head section, and the vibrator causes unevenness on the ink liquid surface of the slit-shaped opening to promote the formation of an ink meniscus due to electrostatic force.
Alternatively, methods have been proposed in which this formation process is shortened or omitted, but in this case, since the ejection occurs randomly, it is difficult to create a constant unevenness on the meniscus, and it is difficult to create uniform irregularities in the meniscus. was also difficult to deal with.
ｌ−一旗
本発明は、上述のごとき実情に鑑みてなされたもので、
特に、安定したメニスカスを形成させて電界強度の集中
を図り、噴射効率を向上させることを目的としてなされ
たものである。The present invention was made in view of the above-mentioned circumstances.
In particular, this was done with the aim of forming a stable meniscus, concentrating the electric field strength, and improving the injection efficiency.
構 成
本発明は、上記目的を達成するために、静電誘引力を利
用してインク噴出口よりインクを噴出させて記録紙に付
着させる静電型インクジェット記録装置において、イン
ク供給路を有するボディと、複数個のノズルが一体的に
形成されたノズルプレートとからなり、前記インク供給
路の開口部に前記ノズルプレートが接合され、該ノズル
プレートの各ノズル周辺に記録電極が配設されるととも
に、前記インク供給路内に該インク供給路のインクを押
圧吐出させるための押圧電極が配設され、該押圧電極が
定常的に又は前記記録電極と同期して駆動されることを
特徴としたものである。以下、本発明の実施例に基づい
て説明する。Structure In order to achieve the above-mentioned object, the present invention provides an electrostatic inkjet recording device that uses electrostatic attraction to eject ink from an ink ejection port and adheres it to recording paper, which comprises: a body having an ink supply path; , comprising a nozzle plate in which a plurality of nozzles are integrally formed, the nozzle plate is joined to the opening of the ink supply path, recording electrodes are arranged around each nozzle of the nozzle plate, and A pressing electrode for pressing and discharging ink in the ink supply path is disposed in the ink supply path, and the pressing electrode is driven constantly or in synchronization with the recording electrode. be. Hereinafter, the present invention will be explained based on examples.
第１図は、本発明による静電型インクジェット記録装置
の一実施例を説明するための要部構成図、第２図は、ヘ
ッド部の斜視図、第３図は、インクジェットヘッドにお
けるメニスカスの形成過程を説明するための図で、図中
、１はヘッドタンク、２は長手方向に延長する溝２ａを
多数有する第１の基板、３は該溝部２ａに対向して配設
された第２の基板で、両基板によりインクジェットヘッ
ドのボディが形成されている。４は前記第１の基板２の
溝部２ａと第２の基板３とによって形成されるインク供
給路、５は前記溝部２ａに対応して前記第２の基板３に
配設された押圧電極、５ａは該押圧電極５に接続され、
押圧電極５に後述する記録電極７に同期させて、或いは
、定常的に電圧を印加するための駆動回路、６は多数の
ノズル６ａが一体的に形成され、前記インク供給路４の
開口部に各ノズル６ａが対応するように接合されたノズ
ルプレート、７は該ノズルプレート６のノズル６８周辺
に配設された記録電極、８は背面電極、９は該背面電極
８の前面に設けた記録紙で、前記インク供給路４にイン
クが供給されると、第３図に示すように、インクは正負
のイオンに分極し、インク供給路４の内壁に、親和性の
大きいイオン（本例では正イオン）が選択的に吸着され
、逆符号のイオン（負イオン）は電気二重層を構成する
。この状態において、正イオンは内壁に固着し、負イオ
ンは流動性を有するものとみなすことができる。FIG. 1 is a main part configuration diagram for explaining an embodiment of an electrostatic inkjet recording apparatus according to the present invention, FIG. 2 is a perspective view of the head section, and FIG. 3 is a formation of a meniscus in the inkjet head. This is a diagram for explaining the process. In the figure, 1 is a head tank, 2 is a first substrate having a large number of grooves 2a extending in the longitudinal direction, and 3 is a second substrate disposed opposite to the grooves 2a. Both substrates form the body of the inkjet head. 4 is an ink supply path formed by the groove 2a of the first substrate 2 and the second substrate 3; 5 is a pressing electrode disposed on the second substrate 3 corresponding to the groove 2a; 5a; is connected to the pressing electrode 5,
A drive circuit 6 is for applying a voltage to the pressing electrode 5 in synchronization with a recording electrode 7, which will be described later, or constantly. A nozzle plate is joined to correspond to each nozzle 6a, 7 is a recording electrode arranged around the nozzle 68 of the nozzle plate 6, 8 is a back electrode, and 9 is a recording paper provided in front of the back electrode 8. When ink is supplied to the ink supply path 4, the ink is polarized into positive and negative ions, as shown in FIG. ions) are selectively adsorbed, and ions of opposite sign (negative ions) form an electric double layer. In this state, positive ions are fixed to the inner wall, and negative ions can be considered to have fluidity.
したがって、前記インク供給路４の両端に配置された一
対の電極、すなわち、前記押圧電極５と記録電極７に、
これら画電極に同期して、或いは、押圧電極５に定常的
に駆動回路（５ａ）より直流電圧が印加されると１、流
動性をもつ負イオンが記録電極７側に吸引され、これら
のひきすりの力でインク液に流動が発生する。更に、前
記背面電極８に電圧が印加されると、電界が形成され、
ノズル６ａに形成されたインクメニスカスに電荷が注入
されてインクが背面電極８側に紡錘形に引張られ、背面
電極８の前面に設けた記録紙７に印写される。Therefore, the pair of electrodes disposed at both ends of the ink supply path 4, that is, the pressing electrode 5 and the recording electrode 7,
When a DC voltage is applied from the drive circuit (5a) to the press electrode 5 in synchronization with these image electrodes or on a regular basis 1, fluid negative ions are attracted to the recording electrode 7 side, and these Flow occurs in the ink liquid due to the force of the pickpocket. Furthermore, when a voltage is applied to the back electrode 8, an electric field is formed,
An electric charge is injected into the ink meniscus formed in the nozzle 6a, and the ink is pulled toward the back electrode 8 in a spindle shape, and is printed on the recording paper 7 provided in front of the back electrode 8.
噴射で消費されたインクの供給は順次行なわれ、ノズル
６ａ先端部には１．常に曲率最小のメニスカスが形成さ
れる。The ink consumed by the ejection is sequentially supplied, and the tip of the nozzle 6a has 1. A meniscus of minimum curvature is always formed.
なお、前記溝部２ａは、例えば１２０μｍのピッチの時
は６０μｍの溝となり、ダイシング加工。Note that the groove portion 2a becomes a 60 μm groove when the pitch is, for example, 120 μm, and is processed by dicing.
ガラスエツチング加工等により容易に製作できる。It can be easily manufactured by glass etching.
また、押圧電極は第２の基板３への印刷やＰＣＢ基板の
活用により容易に製作可能である。Further, the press electrode can be easily manufactured by printing on the second substrate 3 or by using a PCB substrate.
効 果
以上の説明から明らかなように、本発明によると、ノズ
ル先端部に常に曲率最小の安定したメニスカスを形成す
ることができ、噴射効率を向上させることができる。Effects As is clear from the above description, according to the present invention, a stable meniscus with minimum curvature can always be formed at the nozzle tip, and injection efficiency can be improved.
第１図は、本発明による静電型インクジェット記録装置
の一実施例を説明するための要部構成図、第２図は、ヘ
ッド部の斜視図、第３図は、インクジェットヘッドにお
けるメニスカスの形成過程を説明するための図、第４図
は、従来のインクジェットヘッドの一例を説明するため
の要部構成図である。
１・・・ヘッドタンク、２・・・第１の基板、２ａ・・
・溝、３・・・第２の基板、４・・・インク供給路、５
・・・押圧電極、５ａ・・・駆動回路、６・・・ノズル
プレート、６ａ・・・ノズル、７・・・記録電極、８・
・・背面電極、９・・・記録紙。
第 １ 図
↓
第２図
第３図
↓
第４図FIG. 1 is a main part configuration diagram for explaining an embodiment of an electrostatic inkjet recording apparatus according to the present invention, FIG. 2 is a perspective view of the head section, and FIG. 3 is a formation of a meniscus in the inkjet head. FIG. 4, which is a diagram for explaining the process, is a main part configuration diagram for explaining an example of a conventional inkjet head. 1... Head tank, 2... First board, 2a...
- Groove, 3... Second substrate, 4... Ink supply path, 5
... Pressing electrode, 5a... Drive circuit, 6... Nozzle plate, 6a... Nozzle, 7... Recording electrode, 8...
... Back electrode, 9... Recording paper. Figure 1 ↓ Figure 2 Figure 3 ↓ Figure 4
Claims (1)
せて記録紙に付着させる静電型インクジェット記録装置
において、インク供給路を有するボディと、複数個のノ
ズルが一体的に形成されたノズルプレートとからなり、
前記インク供給路の開口部に前記ノズルプレートが接合
され、該ノズルプレートの各ノズル周辺に記録電極が配
設されるとともに、前記インク供給路内に該インク供給
路のインクを押圧吐出させるための押圧電極が配設され
、該押圧電極が定常的に又は前記記録電極と同期して駆
動されることを特徴とする静電型インクジェット記録装
置。In an electrostatic inkjet recording device that ejects ink from an ink ejection port using electrostatic attraction and adheres it to recording paper, a nozzle that has a body having an ink supply path and a plurality of nozzles integrally formed. Consisting of a plate,
The nozzle plate is joined to the opening of the ink supply path, recording electrodes are arranged around each nozzle of the nozzle plate, and a recording electrode is provided for pressurizing and ejecting the ink of the ink supply path into the ink supply path. An electrostatic inkjet recording device characterized in that a pressing electrode is provided, and the pressing electrode is driven constantly or in synchronization with the recording electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27110787A JPH01110964A (en) | 1987-10-26 | 1987-10-26 | Electrostatic type ink-jet recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27110787A JPH01110964A (en) | 1987-10-26 | 1987-10-26 | Electrostatic type ink-jet recording apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01110964A true JPH01110964A (en) | 1989-04-27 |
Family
ID=17495438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27110787A Pending JPH01110964A (en) | 1987-10-26 | 1987-10-26 | Electrostatic type ink-jet recording apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01110964A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0703081A2 (en) * | 1994-09-22 | 1996-03-27 | Kabushiki Kaisha Toshiba | Ink jet printing apparatus with controlled compression and ejection of colorants in liquid ink |
| EP0836943A2 (en) * | 1996-10-17 | 1998-04-22 | Nec Corporation | Electrostatic ink jet printer and head |
| EP0933214A2 (en) * | 1998-01-30 | 1999-08-04 | H. Bollmann Manufacturers Ltd. | A method of and apparatus for directing ink towards substrate |
| US7604326B2 (en) * | 2003-08-08 | 2009-10-20 | Sharp Kabushiki Kaisha | Electrostatic suction type fluid discharge device |
-
1987
- 1987-10-26 JP JP27110787A patent/JPH01110964A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0703081A2 (en) * | 1994-09-22 | 1996-03-27 | Kabushiki Kaisha Toshiba | Ink jet printing apparatus with controlled compression and ejection of colorants in liquid ink |
| EP0703081A3 (en) * | 1994-09-22 | 1997-03-12 | Toshiba Kk | Ink jet printing apparatus with controlled compression and ejection of colorants in liquid ink |
| EP0836943A2 (en) * | 1996-10-17 | 1998-04-22 | Nec Corporation | Electrostatic ink jet printer and head |
| EP0836943A3 (en) * | 1996-10-17 | 1999-05-26 | Nec Corporation | Electrostatic ink jet printer and head |
| EP0933214A2 (en) * | 1998-01-30 | 1999-08-04 | H. Bollmann Manufacturers Ltd. | A method of and apparatus for directing ink towards substrate |
| EP0933214A3 (en) * | 1998-01-30 | 2000-04-12 | H. Bollmann Manufacturers Ltd. | A method of and apparatus for directing ink towards substrate |
| US7604326B2 (en) * | 2003-08-08 | 2009-10-20 | Sharp Kabushiki Kaisha | Electrostatic suction type fluid discharge device |
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