JPS6184252A - Ink jet recording device - Google Patents
Ink jet recording deviceInfo
- Publication number
- JPS6184252A JPS6184252A JP20741484A JP20741484A JPS6184252A JP S6184252 A JPS6184252 A JP S6184252A JP 20741484 A JP20741484 A JP 20741484A JP 20741484 A JP20741484 A JP 20741484A JP S6184252 A JPS6184252 A JP S6184252A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- ink jet
- moistening
- jet recording
- discharge
- 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 claims description 13
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 10
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 abstract description 7
- -1 polydimethylsiloxan Polymers 0.000 abstract description 6
- 238000001035 drying Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 2
- 239000012530 fluid Substances 0.000 abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 5
- 230000005499 meniscus Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- AJDUTMFFZHIJEM-UHFFFAOYSA-N n-(9,10-dioxoanthracen-1-yl)-4-[4-[[4-[4-[(9,10-dioxoanthracen-1-yl)carbamoyl]phenyl]phenyl]diazenyl]phenyl]benzamide Chemical compound O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2NC(=O)C(C=C1)=CC=C1C(C=C1)=CC=C1N=NC(C=C1)=CC=C1C(C=C1)=CC=C1C(=O)NC1=CC=CC2=C1C(=O)C1=CC=CC=C1C2=O AJDUTMFFZHIJEM-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000001043 yellow dye 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
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16517—Cleaning of print head nozzles
- B41J2/16552—Cleaning of print head nozzles using cleaning fluids
Landscapes
- Ink Jet (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は油性インクを使用し静電力によりインクを吐出
させる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 the Invention The present invention relates to an inkjet recording apparatus that uses oil-based ink and ejects the ink using electrostatic force.
従来例の構成とその問題点
静電力によりインクを吐出させるインクジェット記録装
置は特公昭３６−１３７６８号公報、特開昭５４−１３
６３３０号公報、特開昭５６−４４６７２べ−１
号公報、特開昭５７−１２０４５２号公報等によって公
知である。Conventional configurations and their problems Inkjet recording devices that eject ink using electrostatic force are disclosed in Japanese Patent Publication No. 36-13768 and Japanese Patent Application Laid-Open No. 54-13.
This method is known from Japanese Patent Application Laid-open No. 6330, Japanese Patent Application Laid-Open No. 56-44672B-1, Japanese Patent Application Laid-Open No. 120452-1987, and the like.
第１図は、特開昭５７−１２０４５２号公報に記載のイ
ンクジェット記録装置を示す。FIG. 1 shows an inkjet recording apparatus described in Japanese Patent Application Laid-Open No. 57-120452.
第１図において、空気吐出口１とインク吐出口２が対向
して設置されており、空気吐出口１が穿孔された部材と
インク吐出口２が穿孔された部材との間隙により構成さ
れた空気層５には環状の空気室６を介して空気流が流れ
、空気吐出口１あるいはインク吐出口２近傍で急激な曲
りを生じながら空気吐出口１よシ空気流が流出している
。In FIG. 1, an air discharge port 1 and an ink discharge port 2 are installed facing each other, and air is formed by a gap between a member in which the air discharge port 1 is perforated and a member in which the ink discharge port 2 is perforated. An air stream flows through the layer 5 through an annular air chamber 6, and the air stream flows out from the air outlet 1 while making a sharp bend near the air outlet 1 or the ink outlet 2.
一方、インク吐出口２に隣接したインク室７はインク溜
り８に連通ずることにより常時インクで満たされており
、かつ空気供給源９により送られる空気圧力によシイン
ク溜り８およびインク室７内のインクには一定の圧力が
印加されている。On the other hand, the ink chamber 7 adjacent to the ink discharge port 2 communicates with the ink reservoir 8 and is constantly filled with ink. A constant pressure is applied to the ink.
これは、インクジェット記録装置の非駆動時に、空気流
により生じるインク吐出口２近傍の空気圧力とインク吐
出口２内のインクの圧力がほぼ等しくインク吐出口２に
生じるインクのメニスカスが静止して保たれるようにす
るためである。This is because when the inkjet recording device is not driven, the air pressure near the ink ejection port 2 caused by the air flow and the pressure of the ink inside the ink ejection port 2 are approximately equal, and the meniscus of ink generated at the ink ejection port 2 remains stationary. This is to make it hang down.
空気吐出口１の表面およびインク吐出口２の裏面には各
々電極３および電極４が設けられており、電極３と電極
４に電位差を設けると、この電位差による静電力によっ
てインク吐出口２に生じているインクのメニスカスが空
気吐出口１の方向に引き伸ばされる。インク吐出口２が
ら空気吐出口１に至る空間には空気流によって急激な圧
力勾配の変化が生じているため、インク吐出口２のイン
クのメニスカスは一定長さ以上引き伸ばされると急激に
加速され空気吐出口１より飛翔する。An electrode 3 and an electrode 4 are provided on the surface of the air discharge port 1 and the back surface of the ink discharge port 2, respectively. When a potential difference is provided between the electrode 3 and the electrode 4, an electrostatic force generated by this potential difference is generated at the ink discharge port 2. The meniscus of ink in the air is stretched in the direction of the air outlet 1. In the space from the ink discharge port 2 to the air discharge port 1, a sudden change in pressure gradient occurs due to the air flow, so when the ink meniscus at the ink discharge port 2 is stretched beyond a certain length, it is rapidly accelerated and the air It flies from the discharge port 1.
一般に数１ｏμと云う微小開口よりインクを吐出させる
インクジェット記録装置において、長時間放置した場合
インクの乾燥による前記微小開口の目詰りが問題となる
。ここで云う目詰りとは、まったくインク吐出が出来な
い状態と同時に多少の吐出は行なわれるが、その吐出状
態が不安定であり、通常の記録状態を示さない場合も含
める。Generally, in an inkjet recording apparatus that ejects ink from a microscopic aperture of several tens of microns, if left for a long time, the microscopic aperture may become clogged due to drying of the ink. The clogging referred to here includes a state in which ink cannot be ejected at all, and at the same time, a state in which ink is ejected to some extent, but the ejection state is unstable and does not show a normal printing state.
この原因は、空気によりインク溶媒の蒸発による組成変
化のためであり、第１図に示したインクジェット記録装
置も例外ではない。この目詰り現象を防止するため、イ
ンク吐出口付近を常に加湿してインクの乾燥を防止する
事が考えられる。しかしながら、静電力を利用した本装
置のインクシエンド記録装置においては、インク吐出の
だめのインク組成の微妙な変化が犬きく影響すると同時
に、微小開口部の先端でのインク組成変化が吐出を左右
している。この様な事から、目詰り原因の要因として粘
度、比抵抗９表面張力等の変化が考えられるが、実際に
は微小開口部の先端の変化、及び目詰り状態は、粘度等
の諸物性値開の相互依存等が複雑に影響し合っている事
から生じているため原因を明確化する事ができない。し
だがって現状目詰９防止に対する明確な方向は見いださ
れていない。また、目詰シ防止のだめの加湿液は、極端
にインク物性を変化させる様なもの、たとえばインクの
粘度に対し、非常に低い粘度のものを加湿度とした場合
、一般に吐出状態の不安定あるいは不吐出が発生する。The reason for this is a change in composition due to evaporation of the ink solvent by air, and the inkjet recording apparatus shown in FIG. 1 is no exception. In order to prevent this clogging phenomenon, it is conceivable to constantly humidify the vicinity of the ink ejection ports to prevent the ink from drying out. However, in the ink side recording device of this device that uses electrostatic force, subtle changes in the ink composition of the ink ejection reservoir have a strong influence, and at the same time, changes in the ink composition at the tip of the minute opening affect ejection. ing. Based on these facts, changes in viscosity, specific resistance9 surface tension, etc. are considered to be the cause of clogging, but in reality, changes in the tip of the minute opening and the state of clogging are determined by various physical property values such as viscosity. The cause cannot be clarified because it is caused by the interdependence of development and other factors that affect each other in a complex manner. Therefore, no clear direction for preventing clogging 9 has been found at present. In addition, if the humidifying liquid used to prevent clogging is something that will drastically change the physical properties of the ink, for example, something that has a very low viscosity compared to the viscosity of the ink, it will generally cause unstable ejection or Non-discharge occurs.
したがって、加湿液としては、インクの主溶媒に近い組
成のものが適するが、油Ａ−
性インクの場合、かならずしも、染料の溶解性等から、
各色のインクに対し同一のものが得られにくい。Therefore, a humidifying liquid with a composition close to that of the main solvent of the ink is suitable, but in the case of oil-based ink, it is not always possible to
It is difficult to obtain the same ink for each color.
更に、加湿度としては、取り扱いの容易な液体である事
は云うまでもなく、蒸発のしやすいもの、長期使用にお
いて、物性変化の少いものなどの条件が要求される。Furthermore, as for humidification, conditions such as a liquid that is easy to handle, easily evaporates, and whose physical properties change little during long-term use are required.
発明の目的
本発明は以上のような諸問題を解決するもので、目詰り
によるインクの不吐出や吐出不安定を防止するとともに
、安定性、安全性のすぐれた加湿液を得ることを目的と
する。Purpose of the Invention The present invention solves the above-mentioned problems, and aims to prevent ink non-discharge or unstable discharge due to clogging, and to obtain a humidifying liquid with excellent stability and safety. do.
発明の構成
上記目的を達成するために、本発明は油性インクを使用
するインクジェット記録ヘッドと、インクジェット記録
ヘッドのインク吐出口を加湿する加湿装置とを備え、加
湿液として平均分子量が１７０〜３，２００のポリジメ
チルシロキサンを主成分とする液を使用するようにした
インフジエラ、ト記録装置である。Structure of the Invention In order to achieve the above object, the present invention includes an inkjet recording head that uses oil-based ink, and a humidifying device that humidifies the ink ejection openings of the inkjet recording head. This is an infusiera recording device that uses a liquid whose main component is polydimethylsiloxane No. 200.
６へ−７ 実施例の説明 以下本発明の実施例について詳細に説明する。to 6-7 Description of examples Examples of the present invention will be described in detail below.
第２図は本発明に使用される加湿装置の概要を示したも
ので、第１図に示したインクジェット記録装置に適用し
た場合について説明する。FIG. 2 shows an outline of the humidifying device used in the present invention, and the case where it is applied to the inkjet recording apparatus shown in FIG. 1 will be described.
インクジェット記録装置の非駆動時に、インクジェット
記録ヘッド１０の前面をキャンプ１１で覆い、キャップ
１１に連通したパイプ１２の内包された含浸材１３によ
って供給されるケース１５内の加湿液１４の蒸気をキャ
ップ１１内に充満させ、インク吐出口内のインクの乾燥
を防止する。When the inkjet recording apparatus is not driven, the front surface of the inkjet recording head 10 is covered with a camp 11, and the vapor of the humidifying liquid 14 in the case 15 supplied by the impregnating material 13 contained in the pipe 12 communicating with the cap 11 is transferred to the cap 11. This prevents the ink from drying inside the ink ejection port.
使用インク組成として、溶媒はアルコール、セロソルブ
、ケトン系の混合溶媒、及び保土谷化学工業■の黄色染
料を使用、叉点は、アルコール。The ink composition used is a mixed solvent of alcohol, cellosolve, and ketone, and a yellow dye from Hodogaya Chemical Industry ■.The solvent used is alcohol.
グリコール系混合溶媒を用いた。A glycol-based mixed solvent was used.
加湿液としては、平均分子量が１６０〜５０００のポリ
ジメチルシロキサンを使用し、テスト法は、第２図に示
す構成により、非駆動時間により、目詰り（吐出不良）
状態をチェックした。結果は第１表に示す如くである。Polydimethylsiloxane with an average molecular weight of 160 to 5000 is used as the humidifying liquid, and the test method uses the configuration shown in Figure 2 to detect clogging (defective discharge) due to non-driving time.
I checked the condition. The results are shown in Table 1.
了・＼−
第 １ 表
第１表は、各分子量（±１０係）のポリジメチルシロキ
サンを加湿液として用いたもので、キャップを用いた状
態で非駆動時間を測定し、再駆動を行ない吐出異状が見
られる丑での時間を示したものであり、例えば平均分子
量１７０の場合５０時間非駆動の場合でも、再駆動させ
た時、正常な吐出が行なわれたことを示す。- Table 1 In Table 1, polydimethylsiloxane of various molecular weights (±10 factors) was used as a humidifying liquid.The non-driving time was measured with the cap on, and the discharge was performed by re-driving. This shows the time at which abnormalities are observed. For example, in the case of an average molecular weight of 170, even if the device was not driven for 50 hours, normal ejection was performed when the device was driven again.
第１表の結果から、インク組成とは異なる加湿液であっ
ても加湿効果が確認された。すなわち、平均分子量が１
７０〜３２００のポリジメチルシロキサンを使用すれば
、１２時間〜５０時間の不使用時間があっても再駆動を
安定して行なうことができる。平均分子量が３２００を
越えると再駆動可能な時間が１０時間以下となり、実用
性に乏しくなる。また分子量が１６０以下のものは蒸発
量が多すぎて実用的ではない。From the results in Table 1, it was confirmed that even a humidifying liquid different from the ink composition had a humidifying effect. That is, the average molecular weight is 1
If polydimethylsiloxane having a molecular weight of 70 to 3200 is used, re-driving can be performed stably even after 12 to 50 hours of non-use. If the average molecular weight exceeds 3,200, the re-driving time will be less than 10 hours, making it impractical. Further, those having a molecular weight of 160 or less are not practical because the amount of evaporation is too large.
この様に、インクの主溶媒以外を使用する事により実用
に適する加湿溶媒を見つけ出す事ができた。又この溶媒
はインクにある程度溶は込むと思われるが、特性には影
響していないと考えられる。In this way, by using a solvent other than the main solvent of the ink, we were able to find a humidifying solvent that is suitable for practical use. Although this solvent seems to dissolve into the ink to some extent, it does not seem to affect the properties.
その理由については明確ではない。さらにこの溶媒は、
安定性、安全性のすぐれたものである事から、この点に
ついても十分実用的である。The reason for this is not clear. Furthermore, this solvent
Since it has excellent stability and safety, it is also fully practical in this respect.
発明の効果
以上ようするに、本発明では、加湿液として、ポリジメ
チルシロキサンを用いる事により、実用に適する加湿効
果により目詰り防止が可能となったと同時に、溶媒の安
定性等により、加湿装置の適用範囲を広げる事の可能な
インクジェット記録装置を提供するものである。Effects of the Invention In summary, in the present invention, by using polydimethylsiloxane as the humidifying liquid, it is possible to prevent clogging due to the humidifying effect suitable for practical use, and at the same time, the range of application of the humidifying device is improved due to the stability of the solvent. The present invention provides an inkjet recording device that can expand the
第１図は本発明の適用されるインクジェット記録装置の
一例を示す一部断面概略図、第２図は本発明に使用され
る加湿装置の実施例の概略図である０
９”−゛
１・・・・・・空気吐出口、２・・・・・・インク吐出
口、３゜４・・・・電極、５・・・・・空気層、６・・
・・・・空気室、γ・・・・・・・インク室、８・・・
インク溜り、９・・・・・・空気供給源、１ｏ・・・・
・・インクジェット記録ヘッド、１１・・・・・キャッ
プ、１２・・・・パイプ、１３・・・・・含浸材、１４
・・・・・・加湿液、１５・・・・・ケース。FIG. 1 is a partially cross-sectional schematic diagram showing an example of an inkjet recording apparatus to which the present invention is applied, and FIG. 2 is a schematic diagram of an embodiment of a humidifying device used in the present invention. ...Air discharge port, 2...Ink discharge port, 3゜4...Electrode, 5...Air layer, 6...
...Air chamber, γ...Ink chamber, 8...
Ink reservoir, 9...Air supply source, 1o...
... Inkjet recording head, 11 ... Cap, 12 ... Pipe, 13 ... Impregnation material, 14
...humidifying liquid, 15...case.
Claims (1)
ドと、前記インクジェット記録ヘッドのインク吐出口を
加湿する加湿装置とを備え、前記加湿装置に供給する加
湿液として平均分子量が１７０〜３，２００のポリジメ
チルシロキサンを主成分とする液を使用することを特徴
とするインクジェット記録装置。(1) An inkjet recording head that discharges oil-based ink, and a humidifying device that humidifies the ink discharge ports of the inkjet recording head, and a polydimethyl having an average molecular weight of 170 to 3,200 is used as a humidifying liquid to be supplied to the humidifying device. An inkjet recording device characterized by using a liquid containing siloxane as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20741484A JPH0643134B2 (en) | 1984-10-03 | 1984-10-03 | Inkjet recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20741484A JPH0643134B2 (en) | 1984-10-03 | 1984-10-03 | Inkjet recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6184252A true JPS6184252A (en) | 1986-04-28 |
| JPH0643134B2 JPH0643134B2 (en) | 1994-06-08 |
Family
ID=16539349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20741484A Expired - Lifetime JPH0643134B2 (en) | 1984-10-03 | 1984-10-03 | Inkjet recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0643134B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0992354A3 (en) * | 1998-10-09 | 2000-06-14 | Eastman Kodak Company | Cleaning fluid for inkjet printers |
| EP0992355A3 (en) * | 1998-10-09 | 2000-11-22 | Eastman Kodak Company | Cleaning and repairing fluid for printhead cleaning |
-
1984
- 1984-10-03 JP JP20741484A patent/JPH0643134B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0992354A3 (en) * | 1998-10-09 | 2000-06-14 | Eastman Kodak Company | Cleaning fluid for inkjet printers |
| EP0992355A3 (en) * | 1998-10-09 | 2000-11-22 | Eastman Kodak Company | Cleaning and repairing fluid for printhead cleaning |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0643134B2 (en) | 1994-06-08 |
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