JPS61118261A - Multi-nozzle head for ink jet printer - Google Patents

Multi-nozzle head for ink jet printer

Info

Publication number
JPS61118261A
JPS61118261A JP24030584A JP24030584A JPS61118261A JP S61118261 A JPS61118261 A JP S61118261A JP 24030584 A JP24030584 A JP 24030584A JP 24030584 A JP24030584 A JP 24030584A JP S61118261 A JPS61118261 A JP S61118261A
Authority
JP
Japan
Prior art keywords
head
nozzle head
electrode
nozzle
jet printer
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
Application number
JP24030584A
Other languages
Japanese (ja)
Inventor
Toshitaka Hirata
平田　俊敞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP24030584A priority Critical patent/JPS61118261A/en
Publication of JPS61118261A publication Critical patent/JPS61118261A/en
Pending legal-status Critical Current

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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14201—Structure of print heads with piezoelectric elements
    • B41J2/14298—Structure of print heads with piezoelectric elements of disc type

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

PURPOSE:To obtain good-quality pictures by equalizing jet characteristics as well as to improve maintenance by making head units exchangeable by trimming the electrode face of a piezoelectric element for exciting the multi-nozzle head for an ink jet printer. CONSTITUTION:A part 22 of the electrode 21 of a piezoelectric element 20 is trimmed and attached with a leader line 23. At a time when a head is assembled, the jet characteristics of ink are checked by a characteristics measurer and the electrode 21 deposited with the element 20 is trimmed by a trimmer so that the characteristics between nozzles and heads are equalized. The impedance of the element 20 is changed thereby, and the jet characteristics under the same drive conditions can be varied.

Description

【発明の詳細な説明】 １良た夏 本発明は、オンデマンド型インクジェットプリンタのマ
ルチノズルヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-nozzle head for an on-demand inkjet printer.

災米致亙 一般に、マルチノズルタイプのインクジェットプリンタ
においては、各ノズル間の噴射特性のばらつきにより印
字時のドツトに大小を生じ、印字品質が低下する等の問
題がある。この噴射特性のばらつきは、振動子によるも
のは、振動子の大きさ、厚さ、材質、積電容量等のばら
つきにより発生し、また全体から見れば、ノズルの大き
さ、液室形状、インク通路、ドライブ回路等のばらつき
によって発生する。そこで、従来のマルチノズルタイプ
のプリンタにおいては、駆動回路に、各ノズルの噴射特
性のばらつき補正用の可変抵抗を挿入し、プリンタ装置
として組立てた時点で、各ノ　″ズルからの噴射特性が
均一になるよう駆動回路側の可変抵抗を調整している（
特開昭５６−１０６８６９号公報）。In general, multi-nozzle type inkjet printers have problems such as variations in jetting characteristics between the nozzles, which cause dots to vary in size during printing, resulting in deterioration in printing quality. Variations in jetting characteristics are caused by variations in the vibrator's size, thickness, material, cumulative capacitance, etc., and from an overall perspective, they are caused by the nozzle size, liquid chamber shape, ink This occurs due to variations in passages, drive circuits, etc. Therefore, in conventional multi-nozzle type printers, a variable resistor is inserted into the drive circuit to compensate for variations in the jetting characteristics of each nozzle, so that when assembled as a printer device, the jetting characteristics from each nozzle are uniform. The variable resistance on the drive circuit side is adjusted so that (
JP-A No. 56-106869).

第２図は、斯かるマルチノズルタイプのオンデマンドヘ
ッドを示し、駆動装置１によりマルチノズルヘッド２の
各ピエゾ素子３を励振して、ノズル４からインク滴５を
噴射し、印字している。FIG. 2 shows such a multi-nozzle type on-demand head, in which each piezo element 3 of the multi-nozzle head 2 is excited by the driving device 1, and ink droplets 5 are ejected from the nozzle 4 to print.

第３図は、前述した従来の駆動回路の例を示し。FIG. 3 shows an example of the conventional drive circuit mentioned above.

１０は駆動用トランシタ、１１は抵抗、１２は噴射特性
のばらつき補正用の可変抵抗、１３はピエゾ素子であり
、可変抵抗１２を調整することにより噴射特性を均一化
している。しかしながら、このような従来の噴射特性補
正方式では、ヘッドの故障等でヘッドを交換した場合、
再度噴射特性を見ながら可変抵抗を調整する必要があり
、メンチナンスの作業性が良くなかった。10 is a driving transistor, 11 is a resistor, 12 is a variable resistor for correcting variations in injection characteristics, and 13 is a piezo element. By adjusting the variable resistor 12, the injection characteristics are made uniform. However, with such conventional jetting characteristic correction methods, when the head is replaced due to a head failure, etc.,
It was necessary to adjust the variable resistance while checking the injection characteristics again, and the maintenance workability was not good.

１−一血 本発明は、斯かる事情に鑑みてなされたもので、インク
ジェットプリンタ用マルチノズルヘッドの駆動特性、噴
射特性を均一化し、品質の良い画像を得ると共に、ヘッ
ドユニットに互換性を持たせ、メンテナン性を良くする
ことを目的としてなされたものである。1-1 The present invention has been made in view of the above circumstances, and aims to equalize the driving characteristics and ejection characteristics of a multi-nozzle head for an inkjet printer, obtain high-quality images, and make the head unit compatible. This was done with the aim of improving maintainability.

１ニー−戊 本発明は、前記目的を達成するために、ヘッド励振用ピ
エゾ素子の電極面をトリミングすることにより噴射特性
を均一化したことを特徴としたものである。以下１本発
明を実施例に基づいて説□明する。In order to achieve the above object, the present invention is characterized in that the jetting characteristics are made uniform by trimming the electrode surface of the head excitation piezo element. The present invention will be explained below based on examples.

第１図は５本発明によるマルチノズルヘッドの加圧用ピ
エゾ素子の実施例を示す図である。同図において、２０
はピエゾ素子、２１は電極部であり、その一部２２がト
リミングされている。２３は引出し線である。このトリ
ミングは、ヘッドが組立てられた時点で、特性測定装置
によりインクの噴射特性を調べ、各ノズル間及び各ヘッ
ジ間での特性ばらつきが無くなるにうにピエゾ素子２０
の蒸着された電極面２１をトリミング装置でトリミング
することにより行なう。このトリミングによりピエゾ素
子２０のインピーダンスが変化し、同一駆動条件下での
噴射特性を変えることが可能となる。FIG. 1 is a diagram showing an embodiment of a piezo element for pressurizing a multi-nozzle head according to the present invention. In the same figure, 20
2 is a piezo element, and 21 is an electrode portion, a portion 22 of which is trimmed. 23 is a leader line. This trimming is performed by checking the ink ejection characteristics using a characteristic measuring device when the head is assembled, and checking the piezo element 20 to eliminate variations in characteristics between each nozzle and between each hedge.
This is done by trimming the vapor-deposited electrode surface 21 using a trimming device. This trimming changes the impedance of the piezo element 20, making it possible to change the injection characteristics under the same driving conditions.

勿−一一艮 以上のように本発明によれば、ヘッドの組立工程で均一
のマルチノズルヘッドができるので、プリンタ本体の組
立工程においては、無調整で組立でき、サービス時もヘ
ッドの交換のみでよく、サービス性の向上が計れると共
に、ユーザ側での交換も可能となる。また、駆動回路に
ついては、外部に調整用可変抵抗を使用しないので、ｌ
Ｓｌ！Ｓｌ踏動集積化し、小型化を計る上で有利となる
。As described above, according to the present invention, a uniform multi-nozzle head can be created in the head assembly process, so the printer body can be assembled without adjustment during the assembly process, and only the head can be replaced during service. This can improve serviceability and also allow for replacement on the user side. In addition, as for the drive circuit, since no external adjustment variable resistor is used,
Sl! This is advantageous in terms of integrating Sl pedals and downsizing.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明によるヘッド加圧用ピエゾ索子を示す
図、第２図は、マルチノズルヘッドの例を示す図、第３
図は、従来のヘッド駆動回路を示す図である。 ２０・・・ピエゾ素子、２１・・・電極部、２２・・・
トリミング、２３・・・引出し線。 第２図 第３図 第１図1 is a diagram showing a piezo rod for pressurizing a head according to the present invention, FIG. 2 is a diagram showing an example of a multi-nozzle head, and FIG. 3 is a diagram showing an example of a multi-nozzle head.
The figure shows a conventional head drive circuit. 20... Piezo element, 21... Electrode part, 22...
Trimming, 23...Leader line. Figure 2 Figure 3 Figure 1

Claims (1)

【特許請求の範囲】[Claims] ヘッド励振用ピエゾ素子の電極面をトリミングすること
により噴射特性を均一化したことを特徴とするインクジ
ェットプリンタ用マルチノズルヘッド。A multi-nozzle head for an inkjet printer, characterized in that jetting characteristics are made uniform by trimming the electrode surface of a piezo element for head excitation.
JP24030584A 1984-11-14 1984-11-14 Multi-nozzle head for ink jet printer Pending JPS61118261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24030584A JPS61118261A (en) 1984-11-14 1984-11-14 Multi-nozzle head for ink jet printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24030584A JPS61118261A (en) 1984-11-14 1984-11-14 Multi-nozzle head for ink jet printer

Publications (1)

Publication Number Publication Date
JPS61118261A true JPS61118261A (en) 1986-06-05

Family

ID=17057477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24030584A Pending JPS61118261A (en) 1984-11-14 1984-11-14 Multi-nozzle head for ink jet printer

Country Status (1)

Country Link
JP (1) JPS61118261A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519708A2 (en) * 1991-06-17 1992-12-23 Tektronix Inc. Array jet velocity normalization
US5389956A (en) * 1992-08-18 1995-02-14 Xerox Corporation Techniques for improving droplet uniformity in acoustic ink printing
EP0972641A2 (en) * 1998-06-18 2000-01-19 Xerox Corporation Controlling acoustic ink printing print uniformity by adjusting row electrode area and shape
JP2006150955A (en) * 2004-10-28 2006-06-15 Brother Ind Ltd Manufacturing method for piezoelectric actuator, manufacturing method for liquid transfer device, and manufacturing apparatus for piezoelectric actuator
JP2006156987A (en) * 2004-11-01 2006-06-15 Brother Ind Ltd Piezoelectric actuator, method of manufacturing piezoelectric actuator, liquid transfer apparatus and method of manufacturing liquid transfer apparatus
EP3642042A4 (en) * 2017-06-22 2021-03-10 Fujifilm Dimatix, Inc. A piezoelectric device and method for manufacturing an inkjet head

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0519708A2 (en) * 1991-06-17 1992-12-23 Tektronix Inc. Array jet velocity normalization
US5389956A (en) * 1992-08-18 1995-02-14 Xerox Corporation Techniques for improving droplet uniformity in acoustic ink printing
EP0972641A2 (en) * 1998-06-18 2000-01-19 Xerox Corporation Controlling acoustic ink printing print uniformity by adjusting row electrode area and shape
EP0972641A3 (en) * 1998-06-18 2000-02-09 Xerox Corporation Controlling acoustic ink printing print uniformity by adjusting row electrode area and shape
US6217151B1 (en) 1998-06-18 2001-04-17 Xerox Corporation Controlling AIP print uniformity by adjusting row electrode area and shape
JP2006150955A (en) * 2004-10-28 2006-06-15 Brother Ind Ltd Manufacturing method for piezoelectric actuator, manufacturing method for liquid transfer device, and manufacturing apparatus for piezoelectric actuator
JP2006156987A (en) * 2004-11-01 2006-06-15 Brother Ind Ltd Piezoelectric actuator, method of manufacturing piezoelectric actuator, liquid transfer apparatus and method of manufacturing liquid transfer apparatus
EP3642042A4 (en) * 2017-06-22 2021-03-10 Fujifilm Dimatix, Inc. A piezoelectric device and method for manufacturing an inkjet head

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