JPH01294046A - Liquid jet recording head - Google Patents
Liquid jet recording headInfo
- Publication number
- JPH01294046A JPH01294046A JP12401088A JP12401088A JPH01294046A JP H01294046 A JPH01294046 A JP H01294046A JP 12401088 A JP12401088 A JP 12401088A JP 12401088 A JP12401088 A JP 12401088A JP H01294046 A JPH01294046 A JP H01294046A
- Authority
- JP
- Japan
- Prior art keywords
- wiring board
- liquid
- electrical wiring
- temp
- recording head
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000009429 electrical wiring Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 15
- 230000001815 facial effect Effects 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 239000010409 thin film Substances 0.000 description 10
- 239000011324 bead Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004801 process automation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 210000004916 vomit Anatomy 0.000 description 1
- 230000008673 vomiting 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
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14016—Structure of bubble jet print heads
- B41J2/14153—Structures including a sensor
Landscapes
- 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〕
本発明は液体噴射記録ヘッドに関し、特に温度センサの
ヘッド温度検知精度の向上と温度センサの実装化を簡略
化した液体噴射記録ヘッドに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a liquid jet recording head, and more particularly to a liquid jet recording head that improves the head temperature detection accuracy of a temperature sensor and simplifies the implementation of the temperature sensor. be.
〔従来の技術）
インクジェット記録法（液体噴射記録法）は、記録時に
おける騒音の発生が無視し得る程度に極めて小さいとい
う利点があり、高速記録が可能であり、しかも定着とい
う特別な処理を必要とせずに所謂普通紙に記録を行なう
ことができる利点もあり、最近関心が高まっている。[Prior art] The inkjet recording method (liquid jet recording method) has the advantage that the noise generated during recording is extremely small to the extent that it can be ignored, is capable of high-speed recording, and does not require a special process called fixing. There is also the advantage of being able to record on so-called plain paper without using paper, and interest has been increasing recently.
特に、オンデマンド型インクジェット記録装置はコンテ
ニアス型インクジェットで必要とされる高電圧発生装置
および不要インク回収装置が不要であり、装置を小型化
できるので、特にその応用が有望視されている。In particular, on-demand inkjet recording devices do not require the high voltage generator and unnecessary ink recovery device that are required in continuous inkjet, and the device can be made smaller, so its application is particularly promising.
しかしながら、前記オンデマンド型インクジェット記録
装置においては、記録に使用するインクの特性が温度と
ともに変化し、その結果、記録媒体上での記録ドツト径
力貸温度とともに変化し、環境温度がある所定の温度範
囲からはずれると、良好な印字結果が得られない場合が
ある。However, in the on-demand inkjet recording apparatus, the characteristics of the ink used for recording change with temperature, and as a result, the diameter of the recording dot on the recording medium changes with temperature, and when the environmental temperature is a certain temperature, the characteristics of the ink used for recording change with temperature. If it deviates from this range, good printing results may not be obtained.
従来より、上記欠点を解消するために、ヒーター等の加
熱手段と熱電対、サーミスタ等の温度検出手段とにより
、液体の温度がある所定の温度範囲内におさまるように
制御する方法が知られている。Conventionally, in order to eliminate the above-mentioned drawbacks, a method has been known in which the temperature of the liquid is controlled within a predetermined temperature range using a heating means such as a heater and a temperature detecting means such as a thermocouple or thermistor. There is.
第３図は、この種の従来の液体噴射記録ヘッドを模式的
に示すものである。FIG. 3 schematically shows this type of conventional liquid jet recording head.
従来の液体噴射記録ヘッドにおいては、電気配線基板９
上に、吐出液滴４を吐出する液滴形成手段としての吐出
エレメント１と、この吐出エレメント１を制御する回路
を配置したプリント基板６とが設けられている。プリン
ト基板６とフレキシブルプリント基板ｌＯとは圧着金具
１１によって圧着接続されている。記録液としてのイン
ク液はインク供給管３を通して、液溜２に送られ、適宜
に液溜２より吐出エレメントｌに送られる。プリンタ本
体から、吐出エレメント１内の電気−熱エネルギー変換
体（図示せず）に必要な電力が供給され、熱エネルギー
に変換される。この熱エネルギー供給に応じて、吐出エ
レメント１に送られたインク液は加熱され、この加熱に
よりインク液内に発泡現象を生じ、その発泡エネルギー
により吐出エレメント１よりインク液滴４が吐出される
。In a conventional liquid jet recording head, an electric wiring board 9
An ejection element 1 serving as a droplet forming means for ejecting ejection droplets 4 and a printed circuit board 6 on which a circuit for controlling the ejection element 1 is arranged are provided on the top. The printed circuit board 6 and the flexible printed circuit board 1O are crimped and connected by a crimping fitting 11. Ink liquid as a recording liquid is sent to a liquid reservoir 2 through an ink supply pipe 3, and is sent from the liquid reservoir 2 to an ejection element 1 as appropriate. Necessary power is supplied from the printer main body to an electric-thermal energy converter (not shown) in the ejection element 1, and is converted into thermal energy. In response to this thermal energy supply, the ink liquid sent to the ejection element 1 is heated, and this heating causes a bubbling phenomenon in the ink liquid, and the bubbling energy causes the ink droplet 4 to be ejected from the ejection element 1.
ベースプレート９の裏面にはビード型サーミスタ５が配
設されている。ビード型サーミスタ５は、−ｉ１２に、
ガラスコートされており、小型で、熱容量が小さく、か
つ熱応答性がよく、しかも高温に耐える等の良好な特性
があるために広く使用されている。A bead type thermistor 5 is arranged on the back surface of the base plate 9. The bead type thermistor 5 is connected to -i12,
It is widely used because it is glass-coated, small, has a small heat capacity, has good thermal response, and has good characteristics such as being able to withstand high temperatures.
かかるビード型サーミスタ５の実装にあたっては、ビー
ド型サーミスタ５を電気配線基板９の裏面に接着する。When mounting the bead-type thermistor 5, the bead-type thermistor 5 is bonded to the back surface of the electrical wiring board 9.
このビード型サーミスタ５の感温部の形状は球形であっ
て、電気配線基板９と点接触するので、ビード型サーミ
スタ５の取付作業性が悪く、感温部の位置精度もでにく
い。したがって、吐出エレメント１の温度検知性能にば
らつきが生じる。他方、ビード型サーミスタ５のリード
線１５の固定は、はんだ付は等の手作業で行なわざるを
得ないため、作業工程の自動化に対処できず、作業能率
も低下する。The temperature-sensing portion of the bead-type thermistor 5 has a spherical shape and makes point contact with the electric wiring board 9, so that the bead-type thermistor 5 has poor installation workability and the positioning accuracy of the temperature-sensing portion is difficult to achieve. Therefore, variations occur in the temperature detection performance of the discharge element 1. On the other hand, since the lead wire 15 of the bead-type thermistor 5 must be fixed manually by soldering or the like, the work process cannot be automated and work efficiency is reduced.
更に、ビード型サーミスタ５を用いると、温度検知精度
が悪いために、インク液の温度を常時−定に維持するこ
とが難かしく、インク液滴の吐出性能が一定せず、記録
紙上において良好な印字状態を得にくいという問題点が
あった。Furthermore, when the bead type thermistor 5 is used, it is difficult to maintain the temperature of the ink liquid constantly due to poor temperature detection accuracy, and the ejection performance of the ink droplets is not constant, resulting in poor quality on the recording paper. There was a problem that it was difficult to obtain a printed state.
そこで、本発明の目的は、上述した従来の問題点を解消
し、作業効率が高く、工程の自動化に対処できると共に
、温度検知精度が良好で、インク温度を常時一定に維持
することのできる液体噴射記録ヘッドを提供することに
ある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned conventional problems, to provide a liquid that has high work efficiency, can cope with process automation, has good temperature detection accuracy, and can maintain ink temperature constant at all times. An object of the present invention is to provide an ejection recording head.
かかる目的を達成するために、本発明は、記録液を吐出
噴射させて飛翔液滴を形成するための液体吐出口と、液
体吐出口に記録液を供給するための流路と、流路に沿っ
て設けられ、飛翔液滴を吐出噴射させるためのエネルギ
ーを記録液に供給するためのエネルギー発生手段とを含
む液滴形成手段と、液滴形成手段の温度を検知する温度
検知手段と、液滴形成手段に駆動信号を供給すると共に
、温度検知手段からの検知信号を伝達する第１の電気配
線基板とを具備した液体噴射記録ヘッドにおいて、第１
の電気配線基板の同一主面上に、温度検知手段と液滴形
成手段とが互いに隣接して並設され、第１の電気配線基
板の主面上には、温度検知手段および液体形成手段とは
別の区域に、第２の電気配線基板が設けられ、および温
度検知手段および液滴形成手段と、第２の電気配線基板
とを電気的に接続する接続手段を具えたことを特徴とす
る。In order to achieve such an object, the present invention provides a liquid ejection port for ejecting the recording liquid to form flying droplets, a flow path for supplying the recording liquid to the liquid ejection port, and a flow path for the liquid ejection port. a droplet forming means provided along the recording liquid and including an energy generating means for supplying the recording liquid with energy for discharging and ejecting the flying droplets; a temperature detecting means for detecting the temperature of the droplet forming means; A liquid jet recording head comprising a first electric wiring board that supplies a drive signal to the droplet forming means and also transmits a detection signal from the temperature sensing means.
On the same main surface of the first electrical wiring board, a temperature sensing means and a liquid droplet forming means are arranged adjacent to each other, and on the main surface of the first electrical wiring board, the temperature sensing means and the liquid forming means are arranged side by side. is characterized in that a second electrical wiring board is provided in a separate area, and a connecting means for electrically connecting the temperature sensing means and the droplet forming means to the second electrical wiring board. .
本発明によれば、温度センサ、吐出エレメントおよびプ
リント基板を電気配線基板の同一主面上に配置したので
、温度センサの取付作業性、位置精度が良好であり、し
かも、温度センサの感温部が面接触となるので、温度検
知精度が向上し、したがって、インク液の温度範囲を適
正に制御することができ、以て、良好な印字状態が得ら
れる。According to the present invention, since the temperature sensor, the discharge element, and the printed circuit board are arranged on the same main surface of the electrical wiring board, the mounting workability and positional accuracy of the temperature sensor are good, and the temperature sensing part of the temperature sensor Since surface contact occurs, the temperature detection accuracy is improved, and therefore the temperature range of the ink liquid can be appropriately controlled, resulting in a good printing condition.
以下、図面を参照しつつ本発明の実施例を詳細に説明す
る。Embodiments of the present invention will be described in detail below with reference to the drawings.
夫直■ユ
第１図に本発明の一実施例を示す。本実施例による液体
噴射記録ヘッドにおいては、電気配線基板９の一方の主
面上に、薄型温度センサ、たとえば抵抗体が蒸着によっ
て形成された薄膜型サーミスタ１２および吐出エレメン
ト１を互いに隣接して並設する。電気配線基板９のかか
る主面上には、薄膜型サーミスタ１２および吐出エレメ
ント１とは別の区域に、プリント基板６をも配設する。An embodiment of the present invention is shown in FIG. 1. In the liquid jet recording head according to this embodiment, a thin temperature sensor, for example a thin film thermistor 12 in which a resistor is formed by vapor deposition, and an ejection element 1 are arranged adjacent to each other on one main surface of an electric wiring board 9. Set up On this main surface of the electrical wiring board 9, a printed circuit board 6 is also arranged in an area different from the thin film thermistor 12 and the ejection element 1.
薄膜型サーミスタ１２および吐出エレメント１とプリン
ト基板６とをワイヤ８のワイヤボンディングによって電
気的に接続する。The thin film thermistor 12 and the ejection element 1 are electrically connected to the printed circuit board 6 by wire bonding of the wire 8.
プリント基板６を圧着金具１１を介して、プリンタ本体
に至るフレキシブルプリント基板ｌＯと接続すると共に
、これら両者をこの圧着金具１１で固定する。The printed circuit board 6 is connected to the flexible printed circuit board 1O leading to the printer main body via the crimp fitting 11, and both are fixed by the crimp fitting 11.
吐出エレメント１内には、吐出液滴４を形成するために
設けられたオリフィスと、オリフィスにインクを供給す
るためのインク流路と、インク流路に沿って設けられ、
吐出液滴を形成するために利用される電気−熱エネルギ
ー変換体とが設けられている。The ejection element 1 includes an orifice provided for forming ejected droplets 4, an ink flow path for supplying ink to the orifice, and an ink flow path provided along the ink flow path.
An electrical-to-thermal energy converter is provided which is used to form the ejected droplets.
吐出？＆（Ｗ４４を吐出する吐出エレメント１へのイン
ク液のインク流路には、インク中のゴミを除去するため
のフィルターが適宜に装着されている。vomit? &(A filter for removing dust in the ink is appropriately installed in the ink flow path of the ink liquid to the ejection element 1 that ejects W44.
なお、ヘッド各部の形状および材料物性値は、記録紙上
のドツト径可変範囲等の基本的な記録特性の最適な値に
管理されている。The shape and material properties of each part of the head are controlled to optimal values for basic recording characteristics such as the variable range of dot diameter on recording paper.
吐出エレメント１へのインク液の供給は、インク供給管
３および液溜２を介して行なわれる。インク液滴の吐出
方法については従来例と同様とすることができるので本
実施例においては省略する。Ink liquid is supplied to the ejection element 1 via an ink supply pipe 3 and a liquid reservoir 2. The method of ejecting ink droplets can be the same as in the conventional example, and therefore will not be described in this embodiment.
本実施例においては、薄膜型サーミスタ１２の電極はワ
イヤポンディングパッドとして形成さｎているため、吐
出エレメント１とプリント基板６との接続法はワイヤ８
をワイヤボンディングによって接続するので、同時に一
括して接続することが可能である。ワイヤ８として用い
る材料にはｌを用いることができる。In this embodiment, since the electrode of the thin film thermistor 12 is formed as a wire bonding pad, the method of connecting the ejection element 1 and the printed circuit board 6 is by wire 8.
Since they are connected by wire bonding, it is possible to connect them all at the same time. 1 can be used as the material for the wire 8.
実施例２ 第２図に、本発明の他の実施例を示す。Example 2 FIG. 2 shows another embodiment of the invention.
本実施例の液体噴射記録ヘッドでは、電気配線基板９の
一方の主面上に薄膜型サーミスタ１２および吐出エレメ
ント１を互いに隣接して並設すると共に、この電気配線
基板９の同一主面上にプリント基板６をも配設する。薄
膜型サーミスタ１２および吐出エレメント１とプリント
基板６とをフレキシブルプリント板部１３によって電気
的に接続する。薄膜型サーミスタ１２および吐出エレメ
ント１と、フレキシブルプリント板部１３との互いに対
向する位置には、それぞれ電極１４が設けられている。In the liquid jet recording head of this embodiment, the thin film thermistor 12 and the ejection element 1 are arranged adjacent to each other in parallel on one main surface of the electrical wiring board 9, and on the same main surface of the electrical wiring board 9. A printed circuit board 6 is also provided. The thin film thermistor 12 and the ejection element 1 are electrically connected to the printed circuit board 6 by a flexible printed board section 13. Electrodes 14 are provided at mutually opposing positions of the thin film thermistor 12, the discharge element 1, and the flexible printed board section 13, respectively.
一方、薄膜型サーミスタ１２．吐出エレメントｌおよび
フレキシブルプリント板部１３の各電極１４には、はん
だめっきを予め施しておく。双方に設けられた電極１４
は、電気配線基板９に薄膜型サーミスタ１２、吐出エレ
メント１およびプリント基板６を取り付けた後に、これ
ら各部の上にフレキシブルプリント板部１３を載置し、
このフレキシブルプリント板部１３の上から加熱するこ
とにより、全ての電極１４を一括して電気的に接続する
。On the other hand, the thin film thermistor 12. Solder plating is applied to each electrode 14 of the discharge element 1 and the flexible printed board section 13 in advance. Electrodes 14 provided on both sides
After attaching the thin film thermistor 12, the discharge element 1, and the printed circuit board 6 to the electric wiring board 9, the flexible printed board section 13 is placed on each of these parts,
By heating the flexible printed board section 13 from above, all the electrodes 14 are electrically connected at once.
（発明の効果）
以上説明したように、本発明によれば、温度センサ、吐
出エレメントおよびプリント基板を電気配線基板の同一
主面上に配置したので、温度センサの取付作業性、位置
精度が良好であり、しかも、温度センサの感温部が面接
触となるので、温度検知精度が向上し、したがって、イ
ンク液の温度範囲を適正に制御することができ、以て、
良好な印字状態が得られる。(Effects of the Invention) As explained above, according to the present invention, since the temperature sensor, the discharge element, and the printed circuit board are arranged on the same main surface of the electrical wiring board, the temperature sensor can be mounted easily and with good positional accuracy. Moreover, since the temperature-sensing part of the temperature sensor is in surface contact, the temperature detection accuracy is improved, and therefore the temperature range of the ink liquid can be appropriately controlled.
A good printing condition can be obtained.
更に、サーミスタの取付工程と、電気的接続工程と、液
体噴射記録ヘッドの他の部材の取付工程とを同時に実施
することができるので、作業工程数が削減され、作業工
程の自動化にも対処でき、従って、コスト的にも廉価な
液体噴射記録ヘッドを提供することができる。Furthermore, since the thermistor installation process, electrical connection process, and installation process of other parts of the liquid jet recording head can be performed simultaneously, the number of work processes can be reduced and the work process can be automated. Therefore, it is possible to provide a liquid jet recording head that is inexpensive in terms of cost.
第１図は、本発明の一実施例の液体噴射記録ヘッドを示
す斜視図、
第２図は本発明の他の実施例を示す斜視図、第３図は従
来の液体噴射記録ヘッドの一例を示す斜視図である。
１・・・吐出エレメント、
２・・・液溜、
３・・・インク供給管、
４・・・吐出液滴、
５・・・ビード型サーミスタ、
６・・・プリント基板、
７・・・ワイヤポンディングパッド、
８・・・ワイヤ、
９・・・電気配線基板、
ｌＯ・・・フレキシブルプリント基板、１１・・・圧着
金具、
１２・・・薄膜型サーミスタ、
１３・・・フレキシブルプリント板部、１４・・・電極
、
１５・・・リード線。FIG. 1 is a perspective view showing a liquid jet recording head according to an embodiment of the present invention, FIG. 2 is a perspective view showing another embodiment of the present invention, and FIG. 3 is an example of a conventional liquid jet recording head. FIG. DESCRIPTION OF SYMBOLS 1... Discharge element, 2... Liquid reservoir, 3... Ink supply pipe, 4... Discharged droplet, 5... Bead type thermistor, 6... Printed circuit board, 7... Wire Bonding pad, 8... Wire, 9... Electric wiring board, 1O... Flexible printed circuit board, 11... Crimping fitting, 12... Thin film type thermistor, 13... Flexible printed board part, 14... Electrode, 15... Lead wire.
Claims (1)
液体吐出口と、該液体吐出口に前記記録液を供給するた
めの流路と、該流路に沿って設けられ、前記飛翔液滴を
吐出噴射させるためのエネルギーを前記記録液に供給す
るためのエネルギー発生手段とを含む液滴形成手段と、 前記液滴形成手段の温度を検知する温度検知手段と、 前記液滴形成手段に駆動信号を供給すると共に、前記温
度検知手段からの検知信号を伝達する第１の電気配線基
板と を具備した液体噴射記録ヘッドにおいて、 前記第１の電気配線基板の同一主面上に、前記温度検知
手段と前記液滴形成手段とが互いに隣接して並設され、
前記第１の電気配線基板の前記主面上には、前記温度検
知手段および前記液体形成手段とは別の区域に、第２の
電気配線基板が設けられ、および前記温度検知手段およ
び前記液滴形成手段と、前記第２の電気配線基板とを電
気的に接続する接続手段を具えたことを特徴とする液体
噴射記録ヘッド。[Scope of Claims] 1) A liquid ejection port for ejecting and jetting a recording liquid to form flying droplets, a flow path for supplying the recording liquid to the liquid ejection port, and a flow path along the flow path. a droplet forming means that is provided at a location and includes an energy generating means for supplying the recording liquid with energy for discharging and ejecting the flying droplets; and a temperature detecting means for detecting the temperature of the droplet forming means. , a liquid jet recording head comprising: a first electrical wiring board that supplies a drive signal to the droplet forming means and transmits a detection signal from the temperature sensing means; The temperature sensing means and the droplet forming means are arranged adjacent to each other in parallel on the main surface,
A second electrical wiring board is provided on the main surface of the first electrical wiring board in an area separate from the temperature sensing means and the liquid forming means, and a second electrical wiring board is provided on the main surface of the first electrical wiring board, and a second electrical wiring board is provided on the main surface of the first electrical wiring board, and A liquid jet recording head comprising a connecting means for electrically connecting the forming means and the second electrical wiring board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12401088A JP2670083B2 (en) | 1988-05-23 | 1988-05-23 | Liquid jet recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12401088A JP2670083B2 (en) | 1988-05-23 | 1988-05-23 | Liquid jet recording head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01294046A true JPH01294046A (en) | 1989-11-28 |
| JP2670083B2 JP2670083B2 (en) | 1997-10-29 |
Family
ID=14874791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12401088A Expired - Lifetime JP2670083B2 (en) | 1988-05-23 | 1988-05-23 | Liquid jet recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2670083B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5904395B2 (en) | 2011-07-14 | 2016-04-13 | 株式会社リコー | Droplet discharge head, ink cartridge, and image forming apparatus |
-
1988
- 1988-05-23 JP JP12401088A patent/JP2670083B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2670083B2 (en) | 1997-10-29 |
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