JPS6159915B2 - - Google Patents
Info
- Publication number
- JPS6159915B2 JPS6159915B2 JP12683485A JP12683485A JPS6159915B2 JP S6159915 B2 JPS6159915 B2 JP S6159915B2 JP 12683485 A JP12683485 A JP 12683485A JP 12683485 A JP12683485 A JP 12683485A JP S6159915 B2 JPS6159915 B2 JP S6159915B2
- Authority
- JP
- Japan
- Prior art keywords
- recording
- orifice
- ink
- recording liquid
- heating
- 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.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- 230000008016 vaporization Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000005499 meniscus Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002245 particle 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
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14088—Structure of heating means
- B41J2/14112—Resistive element
- B41J2/14137—Resistor surrounding the nozzle opening
-
- 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
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14032—Structure of the pressure chamber
- B41J2/1404—Geometrical characteristics
Landscapes
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は熱エネルギを利用してインク液滴を記
録媒体に向けて飛翔させる形式の記録装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording device that uses thermal energy to fly ink droplets toward a recording medium.
（従来技術）
タンクと吐出口を結ぶ流路内に圧電素子を配設
し、これに信号電圧を印加して歪ませることによ
り、流路内のインクを加圧してその一部を吐出口
よりインク液滴として記録媒体上に吐出させるよ
うにしたオンデマンド型のインクジエツト記録装
置は、記録時に騒音が発生しないことと、普通紙
上への記録が可能な点で優れているが、反面、圧
電素子の歪量が小さいために所要粒径のインク液
滴を吐出させるためには素子の有効面積を大きく
しなければならず、多数の吐出口を高密度に配列
するのが困難であるといつた問題を有するほか、
素子が復元する際に吸引されたインクが復帰する
のに時間を要するため、記録速度を上げることが
できないといつた問題を有している。(Prior art) A piezoelectric element is placed in the flow path connecting the tank and the ejection port, and by applying a signal voltage to the element and distorting it, the ink in the flow path is pressurized and a part of it is transferred from the ejection port. On-demand inkjet recording devices that eject ink droplets onto a recording medium are superior in that they do not generate noise during recording and can record on plain paper, but on the other hand, piezoelectric elements Because the amount of distortion is small, the effective area of the element must be increased in order to eject ink droplets of the required particle size, and it has been said that it is difficult to arrange a large number of ejection ports at high density. In addition to having problems,
Since it takes time for the sucked ink to return when the element is restored, there is a problem in that the recording speed cannot be increased.
（目 的）
本発明はかかる問題に鑑みてなされたもので、
その目的とするところは、装置の小型化と高速記
録が可能な新たな記録装置を提供することにあ
る。(Purpose) The present invention was made in view of such problems, and
The purpose is to provide a new recording device that is compact and capable of high-speed recording.
（目的達成のための手段）
すなわち、本発明はかかる目的を達成すべく、
記録液体流路の液滴吐出用オリフイス近傍に記録
信号を受けて記録液体を加熱する加熱手段を設け
るとともに、一端が該加熱手段の上流側におい
て、他端が該加熱手段の下流側においてそれぞれ
上記流路に連通するバイパス流路を設けた記録液
滴吐出型記録装置にある。(Means for achieving the objective) That is, in order to achieve the objective, the present invention has the following features:
A heating means for heating the recording liquid in response to a recording signal is provided near the droplet ejection orifice of the recording liquid flow path, and one end is provided on the upstream side of the heating means and the other end is on the downstream side of the heating means. The present invention relates to a recording droplet ejection type recording device that is provided with a bypass flow path communicating with the flow path.
（実施例）
そこで以下に本発明の詳細を図示した実施例に
基づいて説明する。(Example) The details of the present invention will be described below based on illustrated examples.
第１図は本発明に係る記録装置の概要を示した
もので、ヘツド１を構成するハウジング２には、
一端が管３を介してインクタンク４と連通するイ
ンク室５が設けられ、また、このインク室５の他
端はインク液滴を吐出するオリフイス６として形
成された上、この近傍内面には、抵抗体等よりな
る筒状の発熱体７が一体的に設けられていて、そ
の両端に設けた電極８，８に駆動信号を印加する
ことによりその部分のインクを気化し、その体積
膨張を利用してオリフイス６よりインク液滴を吐
出するように構成されている。 FIG. 1 shows an outline of a recording device according to the present invention, in which a housing 2 constituting a head 1 includes:
An ink chamber 5 is provided, one end of which communicates with an ink tank 4 via a tube 3, and the other end of this ink chamber 5 is formed as an orifice 6 for discharging ink droplets. A cylindrical heating element 7 made of a resistor or the like is integrally provided, and by applying a drive signal to electrodes 8 provided at both ends of the heating element 7, the ink in that area is vaporized and the volumetric expansion is utilized. The ink droplets are ejected from the orifice 6 in this manner.
他方このハウジング２には、上記したインク室
５のほかに発熱体７の上流側においてインクタン
ク４からのインクを導入するバイパス管路９が形
成され、その他端は発熱体７の下流側においてイ
ンク室５と連通し、インクを噴射した後に生じる
負圧によつて発熱体７の下流側にインクを補給す
るように構成されている。 On the other hand, in addition to the above-mentioned ink chamber 5, this housing 2 is formed with a bypass conduit 9 for introducing ink from the ink tank 4 on the upstream side of the heating element 7, and the other end for introducing ink from the ink tank 4 on the downstream side of the heating element 7. It communicates with the chamber 5 and is configured to replenish ink to the downstream side of the heating element 7 by the negative pressure generated after ink is ejected.
したがつて、いまオリフイス６の内面に設けた
筒状の発熱体７に信号電圧を印加すると、その部
分のインクは加熱されて気化し（第２図ａ）、そ
の際の体積膨張により、それまでその前方でメニ
スカスａを形成して安定的に位置していたインク
をインク液滴として図示しない記録媒体に向けて
噴出させ、また、これと同時に発熱体７により加
熱気化したインクは、オリフイス６の内面に付着
したインク等を払拭しつつ噴出する（第２図
ｂ）。 Therefore, when a signal voltage is applied to the cylindrical heating element 7 provided on the inner surface of the orifice 6, the ink in that area is heated and vaporized (Fig. 2a), and due to the volumetric expansion at that time, it The ink that had been stably positioned in front of it by forming a meniscus a is ejected as ink droplets toward a recording medium (not shown), and at the same time, the ink heated and vaporized by the heating element 7 is heated and The liquid is ejected while wiping away ink, etc. adhering to the inner surface of the tube (Fig. 2b).
このようにしてオリフイス６からインク液滴と
気化したインクが噴出すると、発熱体７よりオリ
フイス６に至る流路部分は急激に圧力が低下する
ため、この圧力低下に伴つて上流側より発熱体７
部分に新たなインクが流入する一方、発熱体７の
下流側には、ここに連通したバイパス管路９を経
て新たなインクが流入し、この新たなインクによ
り発熱体７を効果的に冷却する一方、オリフイス
６内面との間で新たなメニスカスをいち早く形成
して次の記録のための体勢を整える（第２図
ｃ）。 When ink droplets and vaporized ink are ejected from the orifice 6 in this way, the pressure in the flow path from the heating element 7 to the orifice 6 decreases rapidly.
While new ink flows into the downstream side of the heating element 7, new ink flows into the downstream side of the heating element 7 through a bypass pipe 9 connected thereto, and the heating element 7 is effectively cooled by this new ink. On the other hand, a new meniscus is quickly formed between the inner surface of the orifice 6 and the position for the next recording is prepared (Fig. 2c).
（効 果）
以上述べたように本発明によれば、オリフイス
近傍に設けた加熱手段によつてその部分の記録液
体を加熱気化し、その際の体積膨張によつてオリ
フイスから記録液体を液滴として吐出させるよう
にしたので、記録液体を直接加圧する機構を不要
となしてこの種の記録装置の大巾な小型化を可能
にすると同時に、と複合ヘツドの高密度化を図る
ことができる。(Effects) As described above, according to the present invention, the heating means provided near the orifice heats and vaporizes the recording liquid in that area, and the volumetric expansion at that time causes the recording liquid to drop from the orifice. Since the recording liquid is ejected as a liquid, a mechanism for directly pressurizing the recording liquid is not necessary, and this type of recording apparatus can be significantly downsized, and at the same time, the density of the composite head can be increased.
しかも、記録液体流路に加熱手段をバイパスす
る流路を設けたので、液滴噴出後の加熱部へ下流
側と上流側より記録液体を迅速に充填することに
より、記録速度を大巾に向上させると同時に、新
たな記録液体の供給により加熱手段の効果的な冷
却を可能となして、記録誤動作を未然に防ぐこと
ができる。 Moreover, since the recording liquid flow path is provided with a flow path that bypasses the heating means, recording liquid can be quickly filled into the heating section from the downstream and upstream sides after the droplets are ejected, greatly improving the recording speed. At the same time, the heating means can be effectively cooled by supplying new recording liquid, thereby preventing recording malfunctions.
第１図は本発明の一実施例を示す装置の概要構
成図、第２図ａ乃至ｃはその記録動作を示す説明
図である。
１……ヘツド、２……ハウジング、５……イン
ク室、６……オリフイス、７……発熱体、９……
バイパス管路。
FIG. 1 is a schematic configuration diagram of an apparatus showing an embodiment of the present invention, and FIGS. 2 a to 2 c are explanatory diagrams showing its recording operation. 1... Head, 2... Housing, 5... Ink chamber, 6... Orifice, 7... Heating element, 9...
Bypass pipeline.
Claims (1)
記録信号を受けて記録液体を加熱気化する加熱手
段を設けるとともに、一端が上記加熱手段の上流
側において上記オリフイスと連通し、他端が上記
加熱手段の下流側において上記管路と連通するバ
イパス管路を併設し、上記オリフイスより気化し
て吐出する記録液体の負の動圧により上記バイパ
ス管路内の記録液体を吸引してこれを上記オリフ
イスより液滴として吐出飛翔させることを特徴と
する記録液滴吐出型記録装置。1. A heating means for heating and vaporizing the recording liquid in response to a recording signal is provided near the orifice for discharging droplets in the recording liquid conduit, and one end communicates with the orifice on the upstream side of the heating means, and the other end communicates with the orifice for heating the recording liquid. A bypass conduit communicating with the conduit is provided on the downstream side of the means, and the negative dynamic pressure of the recording liquid vaporized and discharged from the orifice sucks the recording liquid in the bypass conduit and transfers it to the orifice. A recording liquid droplet ejection type recording device characterized by ejecting and flying liquid droplets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12683485A JPS6116865A (en) | 1985-06-11 | 1985-06-11 | Recording globule discharge type recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12683485A JPS6116865A (en) | 1985-06-11 | 1985-06-11 | Recording globule discharge type recording device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7057278A Division JPS54161935A (en) | 1978-06-12 | 1978-06-12 | Ink jet printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6116865A JPS6116865A (en) | 1986-01-24 |
| JPS6159915B2 true JPS6159915B2 (en) | 1986-12-18 |
Family
ID=14945057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12683485A Granted JPS6116865A (en) | 1985-06-11 | 1985-06-11 | Recording globule discharge type recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6116865A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9132634B2 (en) | 2012-11-29 | 2015-09-15 | Palo Alto Research Center Incorporated | Bypass flow path for ink jet bubbles |
-
1985
- 1985-06-11 JP JP12683485A patent/JPS6116865A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6116865A (en) | 1986-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6159916B2 (en) | ||
| US4590482A (en) | Nozzle test apparatus and method for thermal ink jet systems | |
| US5539437A (en) | Hybrid thermal/hot melt ink jet print head | |
| JPS597052A (en) | Liquid injection recorder | |
| JPH0246389B2 (en) | ||
| JPS6159912B2 (en) | ||
| JP3115657B2 (en) | Inkjet printing equipment | |
| JP2846082B2 (en) | Ink jet recording device | |
| JP2753105B2 (en) | Ink jet recording device | |
| JPS6159915B2 (en) | ||
| JP3113123B2 (en) | Ink jet recording device | |
| JPS62500445A (en) | Heating the printer head of an inkjet printer | |
| JPH06126973A (en) | Method for removing foreign particle on heating means of thermal ink jet printer | |
| JPS6334832B2 (en) | ||
| JPS6158312B2 (en) | ||
| JP3320137B2 (en) | Ink jet recording head and ink jet recording apparatus | |
| JPH03275359A (en) | inkjet recording device | |
| JPH0480037A (en) | Driving method of inkjet recording device | |
| JPH03295661A (en) | inkjet recording device | |
| JPH03184854A (en) | Non-contact type recording device | |
| JPS6336951B2 (en) | ||
| JPH04197637A (en) | Ink jet type recording method and recorder | |
| JPS6317623B2 (en) | ||
| JPH0485046A (en) | Ink jet recorder | |
| JP2795740B2 (en) | Ink jet recording device |