JPS62117754A - Ink jet recording apparatus - Google Patents
Ink jet recording apparatusInfo
- Publication number
- JPS62117754A JPS62117754A JP25837485A JP25837485A JPS62117754A JP S62117754 A JPS62117754 A JP S62117754A JP 25837485 A JP25837485 A JP 25837485A JP 25837485 A JP25837485 A JP 25837485A JP S62117754 A JPS62117754 A JP S62117754A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- printing
- temperature
- recording head
- ink
- 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
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
- B41J2/07—Ink jet characterised by jet control
- B41J2/072—Ink jet characterised by jet control by thermal compensation
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明はバブルジェット記録ヘッドを備えたインクジェ
ット記録装置の当該記録ヘッドの温度制御手段に関する
。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a temperature control means for an ink jet recording apparatus equipped with a bubble jet recording head.
〔従来技術）
プリンタやファクシミリなどの記録装置の一型式として
バブルジェット記録ヘッドを備えたインクジェット記録
装置が使用されている。[Prior Art] An inkjet recording device equipped with a bubble jet recording head is used as a type of recording device such as a printer or a facsimile.
この型式のインクジェット記録装置は、印字ドツトを形
成する複数インク吐出口のそれぞれに対応して発熱抵抗
体などから成る電気熱変換体を設け、印字データに基づ
いて各電気熱変換体を駆動することにより液状のインク
内にバブル（気泡）を成長させ、その押圧力によりイン
クを吐出させ飛翔的なインク滴を形成し、もって用紙に
印字ドツトを形成するものである。This type of inkjet recording device is equipped with an electrothermal converter made of a heating resistor, etc., corresponding to each of the plurality of ink ejection ports that form print dots, and drives each electrothermal converter based on print data. This causes bubbles to grow in the liquid ink, and the ink is ejected by the pressure of the bubbles to form flying ink droplets, thereby forming printed dots on paper.
ところで、この種のバブルジェット記録ヘッドにおいて
は、安定したインク滴形成すなわち一定の印字ドツト径
を得るためには記録ヘッドの温度（バイアス温度）を制
御してインクの性状（特に粘度）を適正に維持すること
が要請される。By the way, in this type of bubble jet recording head, in order to form stable ink droplets, that is, to obtain a constant print dot diameter, it is necessary to control the temperature (bias temperature) of the recording head and adjust the ink properties (especially viscosity) appropriately. It is requested that it be maintained.
しかし、従来のバブルジェット記録ヘッドにあっては、
インク吐出時のバイアス温度を室温に近い比較的低い温
度（例えば２０℃〜２５℃）に設定していたので、季節
や時刻などで室温が変化する場合記録ヘッドの温度が室
温に左右されやすく、インク粘度の変化が大きくなって
インク滴形成が不安定になり、印字ドツト径が変化する
などして印字品位が低下しやすいという問題があった。However, with conventional bubble jet recording heads,
The bias temperature during ink ejection was set at a relatively low temperature close to room temperature (for example, 20°C to 25°C), so if the room temperature changes depending on the season or time of day, the print head temperature is likely to be affected by the room temperature. There has been a problem in that the change in ink viscosity becomes large, making ink droplet formation unstable, and the print quality tends to deteriorate due to changes in the print dot diameter.
本発明の目的は、このような従来技術の問題を解決でき
、雰囲気温度が変化する場合でもインクの粘度変化を小
さく抑えることができ、もって安定したインク吐出が得
られるバブルジェット式のインクジェット記録装置を提
供することである。An object of the present invention is to provide a bubble jet type inkjet recording device that can solve the problems of the prior art, suppress changes in ink viscosity even when the ambient temperature changes, and thereby provide stable ink ejection. The goal is to provide the following.
本発明は、インク吐出時の記録ヘッドのバイアス温度を
最高雰囲気温度より高い温度に設定することにより、上
記目的を達成するものである。The present invention achieves the above object by setting the bias temperature of the recording head during ink ejection to a temperature higher than the maximum ambient temperature.
第１図は本発明の一実施例に係るインクジェット記録装
置の要部構成を示す。FIG. 1 shows the main structure of an inkjet recording apparatus according to an embodiment of the present invention.
第１図において、用紙１は、上下に配置された一対づつ
のローラから成る紙送りローラ２，３によって支持され
、かつ矢印Ａ方向へ紙送りされる。In FIG. 1, a sheet of paper 1 is supported by paper feed rollers 2 and 3, each consisting of a pair of upper and lower rollers, and is fed in the direction of arrow A.
紙送りローラ２．３の前方にはこれと平行にガイドシャ
フト４，４が設けられ、該ガイドシャフトに沿ってキャ
リジ５が矢印Ｂ方向に往復駆動される。Guide shafts 4, 4 are provided in front of and parallel to the paper feed roller 2.3, and the carriage 5 is reciprocated in the direction of arrow B along the guide shaft.
前記キャリジ５上にはバブルジェット記録ヘッド６が搭
載されている。A bubble jet recording head 6 is mounted on the carriage 5.
このバブルジェット記録ヘッドの前面すなわち用紙１と
所定間隔（例えば０．８ｍｍ）をおいて対向する面には
縦１列に複数個（例えば２４個または３６１１）のイン
ク吐出口が形成されおり、印字データに基づいて各イン
ク吐出口の電気熱変換体を駆動することによりインク滴
を形成し、用紙１に印字ドツトを形成しながら記録が行
われる。A plurality of ink ejection openings (for example, 24 or 3611) are formed in a vertical row on the front surface of this bubble jet recording head, that is, the surface facing the paper 1 at a predetermined interval (for example, 0.8 mm). Ink droplets are formed by driving the electrothermal transducer of each ink ejection port based on the data, and recording is performed while forming print dots on the paper 1.
また、前記記録ヘッド６にはサーミスター等から成る温
度検出器７および電気熱工翠ルギー変換体から成るヒー
ター８が設けられている。Further, the recording head 6 is provided with a temperature detector 7 made of a thermistor or the like and a heater 8 made of an electrothermal energy converter.
然して、本発明による記録ヘッド温度制御手段によれば
、インク吐出時のバイアス温度を雰囲気温度の最高値よ
り高い温度（例えば４０℃）に設定し、前記温度検出器
７の検出信号に基づき、設定温度より低い時は前記ヒー
ター８をオンにし、設定温度より高い時は印字を中断す
るか、クーラー（図示せず）を作動させるなどして温度
を低下させる。However, according to the recording head temperature control means according to the present invention, the bias temperature during ink ejection is set to a temperature higher than the maximum value of the ambient temperature (for example, 40° C.), and the setting is performed based on the detection signal of the temperature detector 7. When the temperature is lower than the set temperature, the heater 8 is turned on, and when the temperature is higher than the set temperature, printing is interrupted or a cooler (not shown) is activated to lower the temperature.
第２図は第１図の記録装置の制御系を例示するブロック
図である。FIG. 2 is a block diagram illustrating a control system of the recording apparatus shown in FIG. 1.
第２図において、記録装置のＣＰＵ （マイクロプロセ
ッサ）１０は、インターフェース１１を介してホストコ
ンピュータに接続されるとともに、モータドライバ（モ
ータ駆動回路）１２に指令信号を出力してキャリジ送り
モータあるいは紙送りモータ等の駆動源１３の動作を制
御し、かつ、キャリジ５または記録へラド６に搭載した
ヘッドドライバ（ヘッド駆動回路）に指令信号および印
字データ信号を出力して記録へラド６の印字動作を制御
するよう構成されている。In FIG. 2, a CPU (microprocessor) 10 of the recording device is connected to a host computer via an interface 11, and outputs a command signal to a motor driver (motor drive circuit) 12 to drive a carriage feed motor or paper feed. It controls the operation of a drive source 13 such as a motor, and outputs a command signal and a print data signal to a head driver (head drive circuit) mounted on the carriage 5 or the recording pad 6 to perform the printing operation of the recording pad 6. configured to control.
一方、ＣＰＵｌ０には記録ヘッド６のバイアス温度の設
定信号すなわち温度範囲基準値を入力するための温度設
定器１５が接続されている。この温度範囲基準値は最高
雰囲気温度（最高室温など）より高い値例えば４０℃±
３℃などに設定される。On the other hand, a temperature setter 15 is connected to the CPU10 for inputting a bias temperature setting signal for the recording head 6, that is, a temperature range reference value. This temperature range reference value is a value higher than the maximum ambient temperature (maximum room temperature, etc.), e.g. 40℃±
It is set to 3℃, etc.
記録ヘッド６に搭載した温度検出器７がらのバイアス温
度信号はＣＰＵｌ０へ入力され、該ＣＰＵで温度範囲基
準値と比較され、インク吐出時のバイアス温度が低いと
きは記録ヘッド６に搭載したヒーター８をオンにし該バ
イアス温度が最高雰囲気温度より高い温度に制御される
。The bias temperature signal from the temperature detector 7 mounted on the print head 6 is input to the CPU10, where it is compared with a temperature range reference value. is turned on, and the bias temperature is controlled to be higher than the maximum ambient temperature.
第３図は第２図の温度制御系の動作手順を例示するフロ
ーチャートである。FIG. 3 is a flowchart illustrating the operating procedure of the temperature control system shown in FIG.
第３図において、ステップ１００で印字動作がスタート
されると、ステップ１０１で温度設定器１５の設定値が
ＣＰＵｌ０へ入力されるとともに、ステップ１０２で温
度検出器７からの検出値がＣＰＵへ入力され前記設定値
と比較される。In FIG. 3, when the printing operation is started in step 100, the set value of the temperature setting device 15 is input to the CPU10 in step 101, and the detected value from the temperature detector 7 is input to the CPU in step 102. It is compared with the set value.
・検出温度が低いときはステップ１０３へ進みヒーター
８が一定時間オンにされ記録へラド６を加温する。- When the detected temperature is low, the process proceeds to step 103 where the heater 8 is turned on for a certain period of time to heat the rad 6 for recording.
一方、検出温度が高いときはステップ１０４へ進み印字
を一定時間中断して記録ヘッド６の温度低下を待つ。On the other hand, if the detected temperature is high, the process proceeds to step 104, and printing is interrupted for a certain period of time to wait for the temperature of the recording head 6 to decrease.
この加温および冷却を適宜繰返して検出温度が設定温度
範囲（例えば４０℃±３℃）内に達すると、ステップ１
０５へ進み印字を開始する。When the detected temperature reaches the set temperature range (for example, 40°C ± 3°C) by repeating this heating and cooling as appropriate, step 1
Proceed to 05 to start printing.
以上の手順を繰返しながら、インク吐出時（印字中）の
記録ヘッド６のバイアス温度が制御される。By repeating the above procedure, the bias temperature of the recording head 6 during ink ejection (during printing) is controlled.
以上説明した温度制御手段によれば、インク吐出時の記
録ヘッド６のバイアス温度を最高雰囲気温度より高い温
度に設定し、該設定温度に維持されるので、雰囲気温度
が変化する場合でもインクの粘度変化を小さく抑えるこ
とが可能となり、したがって、安定したインク吐出が得
られ、常に一定の印字ドツト径が形成され、もって、印
字品位を向上させることができた。According to the temperature control means described above, the bias temperature of the recording head 6 during ink ejection is set to a temperature higher than the maximum ambient temperature and is maintained at the set temperature, so that even when the ambient temperature changes, the ink viscosity It became possible to suppress the change to a small level, so that stable ink ejection was obtained, and a constant print dot diameter was always formed, thereby improving the print quality.
なお、本発明は、カラー印字あるいは濃淡印字用として
バブルジェット記録ヘッド６を複数個備えたインクジェ
ット記録装置に対しても同様に適用でき、さらに、キャ
リジ走査ではなく１行分づつ印字するラインプリント方
式あるいは１頁分同時に印字するページプリント方式の
インクジェット記録装置に対しても同様に適用可能であ
る。Note that the present invention can be similarly applied to an inkjet recording apparatus equipped with a plurality of bubble jet recording heads 6 for color printing or grayscale printing. Alternatively, the present invention can be similarly applied to an inkjet recording apparatus of a page print type that prints one page at a time.
以上の説明から明らかなごとく、本発明によれば、室温
等の雰囲気温度に影響されずに常に一定の印字ドツト径
が得られ、印字品位を安定化させうるインクジェット記
録装置が得られる。As is clear from the above description, according to the present invention, it is possible to obtain an inkjet recording device that can always obtain a constant printing dot diameter without being affected by ambient temperature such as room temperature, and can stabilize printing quality.
第１図は本発明の一実施例に係るインクジェット記録装
置の要部の斜視図、第２図は第１図のインクジェット記
録装置の制御系のブロック図、第３図は第２図の温度制
御動作の手順を例示するフローチャートである。
６−・−・バブルジェット記録ヘッド、７＝・・・・温
度検出器、８−・・−ヒーター、１０・−・−ＣＰ Ｕ
、 １５−・−・・・・温度設定器。
代理人 弁理士 大 音 康 毅
第１図
第３図FIG. 1 is a perspective view of essential parts of an inkjet recording apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of a control system of the inkjet recording apparatus of FIG. 1, and FIG. 3 is a temperature control diagram of FIG. 2. 3 is a flowchart illustrating an operation procedure. 6--Bubble jet recording head, 7=--Temperature detector, 8--Heater, 10--CPU
, 15-...Temperature setting device. Agent: Yasushi Ooto, Patent Attorney Figure 1 Figure 3
Claims (1)
ト記録装置において、インク吐出時の記録ヘッドのバイ
アス温度を最高雰囲気温度より高い温度に設定すること
を特徴とするインクジェット記録装置。(1) An inkjet recording apparatus equipped with a bubble jet recording head, characterized in that the bias temperature of the recording head during ink ejection is set to a temperature higher than the maximum ambient temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25837485A JPS62117754A (en) | 1985-11-18 | 1985-11-18 | Ink jet recording apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25837485A JPS62117754A (en) | 1985-11-18 | 1985-11-18 | Ink jet recording apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62117754A true JPS62117754A (en) | 1987-05-29 |
Family
ID=17319357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25837485A Pending JPS62117754A (en) | 1985-11-18 | 1985-11-18 | Ink jet recording apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62117754A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5673069A (en) * | 1991-05-01 | 1997-09-30 | Hewlett-Packard Company | Method and apparatus for reducing the size of drops ejected from a thermal ink jet printhead |
| US5736995A (en) * | 1991-05-01 | 1998-04-07 | Hewlett-Packard Company | Temperature control of thermal inkjet printheads by using synchronous non-nucleating pulses |
| US5745132A (en) * | 1991-08-01 | 1998-04-28 | Canon Kabushiki Kaisha | Ink jet recording apparatus having temperature control function |
| US5880753A (en) * | 1990-02-19 | 1999-03-09 | Canon Kabushiki Kaisha | Temperature compensation apparatus and recording head and apparatus using the same |
| US6132023A (en) * | 1991-10-18 | 2000-10-17 | Canon Kabushiki Kaisha | Ink head recovery method and apparatus for carrying out such method |
-
1985
- 1985-11-18 JP JP25837485A patent/JPS62117754A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5880753A (en) * | 1990-02-19 | 1999-03-09 | Canon Kabushiki Kaisha | Temperature compensation apparatus and recording head and apparatus using the same |
| US5673069A (en) * | 1991-05-01 | 1997-09-30 | Hewlett-Packard Company | Method and apparatus for reducing the size of drops ejected from a thermal ink jet printhead |
| US5736995A (en) * | 1991-05-01 | 1998-04-07 | Hewlett-Packard Company | Temperature control of thermal inkjet printheads by using synchronous non-nucleating pulses |
| US5745132A (en) * | 1991-08-01 | 1998-04-28 | Canon Kabushiki Kaisha | Ink jet recording apparatus having temperature control function |
| US5751304A (en) * | 1991-08-01 | 1998-05-12 | Canon Kabushiki Kaisha | Ink jet recording having temperature control function |
| US6116709A (en) * | 1991-08-01 | 2000-09-12 | Canon Kabushiki Kaisha | Ink jet recording apparatus with temperature calculation based on prestored temperature data |
| US6139125A (en) * | 1991-08-01 | 2000-10-31 | Canon Kabushiki Kaisha | Ink jet recording apparatus having temperature control function |
| US6193344B1 (en) | 1991-08-01 | 2001-02-27 | Canon Kabushiki Kaisha | Ink jet recording apparatus having temperature control function |
| US6132023A (en) * | 1991-10-18 | 2000-10-17 | Canon Kabushiki Kaisha | Ink head recovery method and apparatus for carrying out such method |
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