JPH01145154A - Ink jet recording apparatus - Google Patents
Ink jet recording apparatusInfo
- Publication number
- JPH01145154A JPH01145154A JP30353487A JP30353487A JPH01145154A JP H01145154 A JPH01145154 A JP H01145154A JP 30353487 A JP30353487 A JP 30353487A JP 30353487 A JP30353487 A JP 30353487A JP H01145154 A JPH01145154 A JP H01145154A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- ink supply
- supply tank
- pressure
- supplied
- 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
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000035939 shock Effects 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
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
Landscapes
- Ink Jet (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ドロップオンデマンド型のインクジェット記
録装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drop-on-demand type inkjet recording device.
従来のインクジェット記録装置に用いられるドロ、プオ
ンデマンド型インクジェットヘッドの基本的原理を示す
構成断面図を第２図に示す。インク噴射室２１の壁の一
部を構成する弾性プレート２２には、圧電素子２３が貼
シ付けられており、バイモルフを構成している。初期状
態では、インク噴射室２１及びノズル２４には、インク
が満たされている。圧電素子２３に電気パルスを印加す
ると圧電素子２３と弾性プレート２２の撓みにより、イ
ンク噴射室２１内部に圧力波が発生し、この圧力波によ
シ、ノズル２４よりインク滴２５が記録媒体（図示せず
）に向かって噴射される。インク滴噴射後、ノズル２４
０毛細管現象によシインク供給タンク２６よシインク噴
射室２１にインクが再充填される。FIG. 2 is a sectional view showing the basic principle of a drop-on-demand type inkjet head used in a conventional inkjet recording apparatus. A piezoelectric element 23 is attached to an elastic plate 22 that constitutes a part of the wall of the ink ejection chamber 21, forming a bimorph. In the initial state, the ink ejection chamber 21 and the nozzle 24 are filled with ink. When an electric pulse is applied to the piezoelectric element 23, a pressure wave is generated inside the ink ejection chamber 21 due to the deflection of the piezoelectric element 23 and the elastic plate 22, and this pressure wave causes the ink droplet 25 to be ejected from the nozzle 24 onto the recording medium (Fig. (not shown). After ejecting the ink droplets, the nozzle 24
The ink supply tank 26 and the ink ejection chamber 21 are refilled with ink by capillary action.
このような従来のインクジェット記録装置の場合、前述
の様にインク供給をノズル部におけるインクとへ、ド部
材との表面張力による毛細管現象に頼っている為、単位
時間でのインク供給量に限界が有シインク滴生成周波数
が制限される。インク滴生成周波数はインク物性値、特
に表面張力、ヘッド部材およびインク滴体積に依存する
が概ね４〜５ｋＨｚ程度が限界であり１０ｋＨｚを越え
ることは甚だ困難である。In the case of such conventional inkjet recording devices, as mentioned above, the ink supply to the ink in the nozzle part relies on the capillary phenomenon caused by the surface tension with the dome member, so there is a limit to the amount of ink supplied per unit time. Shiny ink drop generation frequency is limited. Although the ink droplet generation frequency depends on the physical properties of the ink, particularly surface tension, head member, and ink droplet volume, the limit is approximately 4 to 5 kHz, and it is extremely difficult to exceed 10 kHz.
本発明の目的は、インク供給を毛細管現象だけに頼らず
、インク消費量に応じて能動的に供給するインク供給装
置を提供することにより、インク滴生成周波数を向上せ
しめ、よシ高速な記録を可能とするインクジェット記録
装置を実現することにある。An object of the present invention is to provide an ink supply device that actively supplies ink according to the amount of ink consumed, without relying solely on capillary action, thereby improving the ink droplet generation frequency and achieving faster recording. The objective is to realize an inkjet recording device that enables this.
本発明によれば、圧電素子に電気パルスを印加すること
によりインク噴射室内に圧力波を発生させ適時インク滴
を噴射させるドロップオンデマンド型インクジェットへ
、ドな用いたインクジェ。According to the present invention, an inkjet is used in a drop-on-demand type inkjet that generates pressure waves in an ink ejection chamber by applying electric pulses to a piezoelectric element and ejects ink droplets at the appropriate time.
ト記録装置において、大気圧に比して充分高いインク供
給圧を常時付与されたインク供給タンクと、該インク供
給タンクとインクジェットヘッドとの間に設けられた弁
と、噴射インク滴数をカウントする噴射滴カウント手段
と、該カウント手段のカウント値をもとに前記弁の開閉
を制御する制御手段とにより構成されるインクジェット
記録装置が得られる。In a recording device, an ink supply tank to which an ink supply pressure sufficiently higher than atmospheric pressure is constantly applied, a valve provided between the ink supply tank and an inkjet head, and the number of ejected ink droplets are counted. An inkjet recording device is obtained that includes an ejected droplet counting means and a control means for controlling opening and closing of the valve based on the count value of the counting means.
第１図は本発明の実施例を示す図である。可撓性外皮よ
りなるインク供給タンク３内に蓄えられたインクは、イ
ンク供給チー−プ２及び電磁弁６を介して印字ヘッド１
に供給される。第１図では省略しているが、通常、イン
ク供給チューブの一部にインク中の塵埃を取り除く塵埃
除去フィルタやインクチー−プを伝播する衝撃波を吸収
するためのインクダンパーが実装される。インク供給タ
ンク３の上には、重シ４が載っておシ、インク供給タン
ク内の圧力を大気圧よシ充分高くたもっている。FIG. 1 is a diagram showing an embodiment of the present invention. The ink stored in the ink supply tank 3 made of a flexible outer shell is delivered to the print head 1 via the ink supply cheep 2 and the solenoid valve 6.
is supplied to Although not shown in FIG. 1, a dust removal filter for removing dust in the ink and an ink damper for absorbing shock waves propagating through the ink cheep are usually mounted on a part of the ink supply tube. A heavy cylinder 4 is placed on top of the ink supply tank 3 to keep the pressure inside the ink supply tank sufficiently higher than atmospheric pressure.
滴カウント手段から得た噴射滴カウントによシ供給すべ
きインク量を計算し電磁弁６の開閉を制御する。電磁弁
６の開放によシインク供給タンク３内に予め付与した圧
力で、強制的に印字へ、ドｌにインクを供給することが
できる。従って、通常の毛細管現象だけに頼ったインク
供給では対応できない様なインク滴生成周波数の高いと
きでも、印字ヘッドに充分なインクを供給でき、安定し
た印字特性が得られる。インク供給タンク３を加圧する
手段としては、重シの他、第３図（ａ） 、 （ｂ）に
示すごとく予めインクカートリッジ内に圧搾空気３２を
いれ、該圧搾空気により、インク供給供給タンクに圧力
を付加する機構、またはスプリング３３で圧力を加える
機構がある。The amount of ink to be supplied is calculated based on the ejected droplet count obtained from the droplet counting means, and the opening and closing of the electromagnetic valve 6 is controlled. By opening the electromagnetic valve 6, the pressure applied in advance in the ink supply tank 3 allows ink to be forcibly supplied to the printer for printing. Therefore, even when the ink droplet generation frequency is high, which cannot be handled by ink supply relying only on normal capillary action, sufficient ink can be supplied to the print head and stable printing characteristics can be obtained. As a means for pressurizing the ink supply tank 3, in addition to the heavy cylinder, compressed air 32 is put into the ink cartridge in advance as shown in FIGS. 3(a) and 3(b), and the compressed air is used to pressurize the ink supply tank. There is a mechanism that applies pressure or a mechanism that applies pressure with a spring 33.
噴射滴カウント手段は、通常プリンタの制御に使用され
ているマイクロプロセ、すにより容易ＩＣ実現できる。The ejected droplet counting means can be easily implemented as an IC using a microprocessor commonly used to control printers.
本発明によれば、インク消費量に応じて能動的ンク滴生
成周、波数の向上に伴うインクジェットヘッド内のイン
ク供給不足を解消でき、よシ高速な記録を行うインクジ
ェット記録装置を実現することができる。According to the present invention, it is possible to solve the ink supply shortage in the inkjet head due to the improvement of the active ink droplet generation frequency and wave number according to the amount of ink consumption, and it is possible to realize an inkjet recording device that performs high-speed recording. can.
第１図は本発明の一実施例を示す図、第２図は従来のイ
ンクジェット記録装置におけるドロップオンデマンド型
インクジェットヘッドの構成断面図、第３図は本発明の
他の実施例におけるインク供給タンク加圧手段を示す図
である。
１・−・・・・印字ヘッド、２・・・・・・インク供給
チューブ、３・・・・・−インク供給タンク、４・・・
・・・重シ、５・・・・・・制御部、６・・・・・・電
磁弁。
代理人 弁理士 内 原 音
看 １ 国
箔２ 口
箭
と
叫
＜Ｕｙ＞ 。し３ 図
；″
とFIG. 1 is a diagram showing one embodiment of the present invention, FIG. 2 is a cross-sectional view of a drop-on-demand type inkjet head in a conventional inkjet recording apparatus, and FIG. 3 is an ink supply tank in another embodiment of the present invention. It is a figure which shows a pressurizing means. 1... Print head, 2... Ink supply tube, 3... Ink supply tank, 4...
...Heavy duty, 5...Control section, 6...Solenoid valve. Agent Patent Attorney Uchihara Otokan 1 Kokuhaku 2 Mouths and shouts <Uy>. 3 Figure;''
Claims (1)
室内に圧力波を発生させ適時インク滴を噴射させるドロ
ップオンデマンド型インクジェットヘッドを用いたイン
クジェット記録装置において、大気圧に比して充分高い
インク供給圧を常時付与されたインク供給タンクと、該
インク供給タンクとインクジェットヘッドとの間に設け
られた弁と、噴射インク滴数をカウントする噴射滴カウ
ント手段と、該カウント手段のカウント値をもとに前記
弁の開閉を制御する制御手段とにより構成されるインク
ジェット記録装置。In an inkjet recording device that uses a drop-on-demand type inkjet head that applies electric pulses to a piezoelectric element to generate pressure waves in the ink ejection chamber and eject ink droplets at the appropriate time, the ink supply pressure is sufficiently high compared to atmospheric pressure. an ink supply tank that is constantly supplied with the ink, a valve provided between the ink supply tank and the inkjet head, an ejected droplet counting means for counting the number of ejected ink droplets, and a count value of the counting means. An inkjet recording apparatus comprising: a control means for controlling opening and closing of the valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30353487A JPH01145154A (en) | 1987-11-30 | 1987-11-30 | Ink jet recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30353487A JPH01145154A (en) | 1987-11-30 | 1987-11-30 | Ink jet recording apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01145154A true JPH01145154A (en) | 1989-06-07 |
Family
ID=17922146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30353487A Pending JPH01145154A (en) | 1987-11-30 | 1987-11-30 | Ink jet recording apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01145154A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0733481A2 (en) * | 1995-03-23 | 1996-09-25 | Hewlett-Packard Company | Apparatus for providing ink to a printhead |
| US5966155A (en) * | 1994-10-31 | 1999-10-12 | Hewlett-Packard Company | Inkjet printing system with off-axis ink supply having ink path which does not extend above print cartridge |
| US6033064A (en) * | 1994-10-31 | 2000-03-07 | Hewlett-Packard Company | Inkjet printer with off-axis ink supply |
| JP2000070773A (en) * | 1998-09-03 | 2000-03-07 | Oce Technol Bv | Constant pressure ink storage container for ink jet printer |
| EP0983857A1 (en) * | 1998-09-03 | 2000-03-08 | Océ-Technologies B.V. | Constant pressure ink reservoir for inkjet printer |
| JP2007007902A (en) * | 2005-06-28 | 2007-01-18 | Fujifilm Holdings Corp | Ink tank and inkjet recorder |
-
1987
- 1987-11-30 JP JP30353487A patent/JPH01145154A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5966155A (en) * | 1994-10-31 | 1999-10-12 | Hewlett-Packard Company | Inkjet printing system with off-axis ink supply having ink path which does not extend above print cartridge |
| US6033064A (en) * | 1994-10-31 | 2000-03-07 | Hewlett-Packard Company | Inkjet printer with off-axis ink supply |
| EP0733481A2 (en) * | 1995-03-23 | 1996-09-25 | Hewlett-Packard Company | Apparatus for providing ink to a printhead |
| EP0733481A3 (en) * | 1995-03-23 | 1997-04-16 | Hewlett Packard Co | Apparatus for providing ink to a printhead |
| US6428152B1 (en) | 1998-03-09 | 2002-08-06 | Oce Technologies B.V. | Constant pressure ink reservoir for an ink jet printer |
| JP2000070773A (en) * | 1998-09-03 | 2000-03-07 | Oce Technol Bv | Constant pressure ink storage container for ink jet printer |
| EP0983857A1 (en) * | 1998-09-03 | 2000-03-08 | Océ-Technologies B.V. | Constant pressure ink reservoir for inkjet printer |
| JP4547054B2 (en) * | 1998-09-03 | 2010-09-22 | オセ−テクノロジーズ ビーブイ | Constant pressure ink storage container for inkjet printer |
| JP2007007902A (en) * | 2005-06-28 | 2007-01-18 | Fujifilm Holdings Corp | Ink tank and inkjet recorder |
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