JPS5942972A - Impact type printer - Google Patents

Impact type printer

Info

Publication number
JPS5942972A
JPS5942972A JP15402482A JP15402482A JPS5942972A JP S5942972 A JPS5942972 A JP S5942972A JP 15402482 A JP15402482 A JP 15402482A JP 15402482 A JP15402482 A JP 15402482A JP S5942972 A JPS5942972 A JP S5942972A
Authority
JP
Japan
Prior art keywords
ink
magnetic
magnetic ink
yokes
wire
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
JP15402482A
Other languages
Japanese (ja)
Inventor
Ko Kikuchi
菊地 曠
Minoru Tejima
手島 実
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP15402482A priority Critical patent/JPS5942972A/en
Publication of JPS5942972A publication Critical patent/JPS5942972A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/22Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/305Ink supply apparatus

Landscapes

  • Impact Printers (AREA)

Abstract

PURPOSE:To obtain an impact type printer capable of returning magnetic ink on the tip of a printing wire by using a system in which a magnetic field formed in the gap between yokes by which magnetic ink is sucked up from an ink container and directed to the printing wire is electrically reduced or annihilated. CONSTITUTION:When the power source of the printer is broken, a holding electromagnet 7 and a stopping electromagnets 9a and 9b are unexcited in such a way as to cause magnetic ink 3 held in the gaps between stopping yokes 8a and 8b and between stopping yokes 8c and 8d to drop onto an inclined face 1c under its own weight. The magnetic ink 3 which flows into the gap between holding yokes 5 and 6 along the inclined face 1c and the magnetic ink 3 already held go down under their own weights and return into the ink container 4.

Description

【発明の詳細な説明】 本発明はインiEクト型ワイヤドツト印字ヘッドで印字
を行なうプリンタに関し、特にインク容器から磁性イン
クを吸い上げて印字ワイヤ先端に付着し、印字媒体に転
写するプリンタに関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printer that prints with an ink-type wire dot print head, and more particularly to a printer that sucks up magnetic ink from an ink container, attaches it to the tip of a print wire, and transfers it to a print medium.

マグネタイトの微粒子(粒子径100〜200X)が界
面活性剤とともに分散媒体中に懸濁された磁性流体と、
インクとを混合した磁性インクを用いることによシ、イ
ンクリボンを不要としたプリンタは既に提案されておシ
、例えば印字ワイヤを横断する磁束を発生して、印字ワ
イヤ先端部に磁性インクを保持しておき、印字ワイヤを
突出して該印字ワイヤ先端部に付着した磁性インクを印
字媒体に転写せしめるものがあった。
A magnetic fluid in which fine particles of magnetite (particle size 100 to 200X) are suspended in a dispersion medium together with a surfactant;
Printers that do not require an ink ribbon by using magnetic ink mixed with ink have already been proposed. There are some devices in which the printing wire is protruded and the magnetic ink attached to the tip of the printing wire is transferred to the printing medium.

しかしながら従来のものは、磁性インクを保持すること
は考慮していても、磁性インクを回収することまでは考
慮されていなかった。
However, although the conventional method takes into account the retention of magnetic ink, it does not take into account the recovery of the magnetic ink.

このため従来のものは非印字部間中も磁性インクが同じ
場所、特に印字ワイヤ先端部に滞留される結果、磁性イ
ンク中の溶媒が蒸発し、濃度が高くなったり磁性粒子、
インク顔料等が固着し、印字不良をおこす欠点があった
For this reason, in the conventional ink, the magnetic ink remains in the same place even during the non-printing area, especially at the tip of the printing wire, and as a result, the solvent in the magnetic ink evaporates, resulting in a high concentration and magnetic particles.
There was a drawback that the ink pigments etc. would stick and cause printing defects.

本発明は前記欠点を除去するため、印字ヘッドの下方に
設けた磁性インクを貯留するインク容器と、インク容器
から磁性インクを吸い上げ印字ワイヤへ導くギャップを
形成したヨークと、このヨーク間のギャップに磁場を形
成し、かつ該磁場を電気的に減少もしくは消滅させ得る
磁束生成手段とを備えたもので、以下図面にしたがい詳
細に説明する。
In order to eliminate the above-mentioned drawbacks, the present invention provides an ink container provided below the print head for storing magnetic ink, a yoke forming a gap for sucking up the magnetic ink from the ink container and guiding it to the printing wire, and a gap between the yokes. It is equipped with a magnetic flux generating means that can form a magnetic field and electrically reduce or eliminate the magnetic field, and will be described in detail below with reference to the drawings.

第1図は本発明の実施例を示す図であって、(a)は正
面図、(b)は半断面平面図、(C)は半断面側面図で
ある。同図において1は上部フレームに先端ワイヤガイ
ド1aを形成し、下部フレームに中間ワイヤガイド1b
と傾斜面1cとを形成したノーズフレーム、2は先端ワ
イヤガイド1aと中間ワイヤガイド1bに案内され図示
せぬワイヤ駆動機構により長手方向へ駆動する磁性体の
印字ワイヤ、3は磁性インク、4は磁性インク3を貯留
するインク容器、5および6は印字°ワイヤ2を挾むよ
う字ワイヤ2の先端部に7字溝を形成したインク保持用
のヨーク(以下保持ヨークという)であシ下端がインク
容器4内の磁性インク3に浸されている。7は保持ヨー
ク5と保持ヨーク6との間に磁場を形成するインク保持
用の電磁石(以下保持電磁石という)、8a〜8dは先
端ワイヤガイド1aと中間ワイヤガイド1bとの間にあ
って磁性インク3を保持するギャップを有し、かつ印字
ワイヤ2を挾むようにして対向する2組のインク阻止用
のヨーク(以下阻止ヨークという)、9aおよび9bは
阻止ヨーク8a、8bと阻止ヨーク8c。
FIG. 1 is a diagram showing an embodiment of the present invention, in which (a) is a front view, (b) is a half-sectional plan view, and (C) is a half-sectional side view. In the same figure, 1 forms a tip wire guide 1a on the upper frame, and an intermediate wire guide 1b on the lower frame.
2 is a magnetic printing wire that is guided by a tip wire guide 1a and an intermediate wire guide 1b and is driven in the longitudinal direction by a wire drive mechanism (not shown); 3 is magnetic ink; 4 is a nose frame having an inclined surface 1c; The ink containers 5 and 6 are for storing the magnetic ink 3, and the yoke 5 and 6 is an ink holding yoke (hereinafter referred to as a holding yoke) in which a 7-shaped groove is formed at the tip of the shaped wire 2 to sandwich the printing wire 2. It is immersed in magnetic ink 3 in a container 4. Numeral 7 is an electromagnet for holding ink (hereinafter referred to as a holding electromagnet) that forms a magnetic field between the holding yoke 5 and the holding yoke 6, and 8a to 8d are located between the tip wire guide 1a and the intermediate wire guide 1b to hold the magnetic ink 3. Two sets of ink blocking yokes (hereinafter referred to as blocking yokes) having a holding gap and facing each other so as to sandwich the printing wire 2, 9a and 9b are blocking yokes 8a and 8b and blocking yoke 8c.

8d間に設けられたインク阻止用の電磁石(以下阻止電
磁石という)である。
This is an ink blocking electromagnet (hereinafter referred to as blocking electromagnet) provided between 8d.

前記構成において動作を説明する。まず保持電磁石7を
励磁すると保持ヨーク5および6のギャップに磁場が形
成される。この磁場によシインク容器4内の磁性インク
3がギャップを埋めるべく吸い上げられ、印字ワイヤ2
の先端部に保持され、付着される。次に図示せぬワイヤ
駆動機構により印字ワイヤ2を突出すると、印字ワイヤ
2に付着した磁性インク3が印字媒体に転写される。こ
の後ワイヤ駆動機構の吸引力あるいは反発力により印字
ワイヤ2が復帰するが、この復帰過程において印字ワイ
ヤ2に付着した磁性インク3が中間ガイド1bへ向かっ
て流れるように移動する。ここで阻止電磁石9aおよび
9bを予め励磁しておくと、前記中間ガイド1bへ向か
って流れるように移動する磁性インク3が、阻止ヨーク
8 a + 8 b間と、阻止ヨーク13c、Bd間に
吸い込まれ保持される。このメカニズムを第2図により
さらに詳細に説明する。即ち阻止電磁石9aが発生した
磁束は阻止ヨーク8aから阻止ヨーク8bへ流れるが、
阻止電磁石9aに近い所の磁束はど強いので、図面では
φ1〉φ2〉φ3となシ、磁力に上向きの勾配が生じる
。同様に阻止電磁石9bが発生した磁束は阻止ヨーク8
Cから阻止ヨーク8dへ流れ、φ1′〉φ2′〉φ3′
となって、磁力に下向きの勾配が生じる。このため印字
ワイヤ2に沿って流れ、阻止ヨーク8a〜8dに達した
磁性インク3は、阻止ヨーク8aお工び8bと阻止ヨー
ク8Cおよび8bによって磁気的に捕捉され、かつ上向
きと下向きに分離され、ヨーク間のギャップに吸い込ま
れ、阻止電磁石9aおよび9bに近い方へ片寄って保持
されるようになる。したがって中間ガイド1bへと流れ
る前記磁性インク3を阻止できる。
The operation in the above configuration will be explained. First, when the holding electromagnet 7 is excited, a magnetic field is formed in the gap between the holding yokes 5 and 6. Due to this magnetic field, the magnetic ink 3 in the ink container 4 is sucked up to fill the gap, and the printing wire 2
It is held and attached to the tip of the Next, when the printing wire 2 is projected by a wire drive mechanism (not shown), the magnetic ink 3 adhering to the printing wire 2 is transferred onto the printing medium. Thereafter, the printing wire 2 returns to its original position due to the suction or repulsion force of the wire drive mechanism, and during this return process, the magnetic ink 3 adhering to the printing wire 2 flows toward the intermediate guide 1b. If the blocking electromagnets 9a and 9b are excited in advance, the magnetic ink 3 flowing toward the intermediate guide 1b will be sucked between the blocking yokes 8a + 8b and between the blocking yokes 13c and Bd. is retained. This mechanism will be explained in more detail with reference to FIG. That is, the magnetic flux generated by the blocking electromagnet 9a flows from the blocking yoke 8a to the blocking yoke 8b, but
Since the magnetic flux near the blocking electromagnet 9a is very strong, an upward gradient occurs in the magnetic force as φ1>φ2>φ3 in the drawing. Similarly, the magnetic flux generated by the blocking electromagnet 9b is transferred to the blocking yoke 8.
Flows from C to the blocking yoke 8d, φ1'>φ2'>φ3'
As a result, there is a downward gradient in the magnetic force. Therefore, the magnetic ink 3 that flows along the printing wire 2 and reaches the blocking yokes 8a to 8d is magnetically captured by the blocking yokes 8a and 8b and the blocking yokes 8C and 8b, and is separated into upward and downward directions. , are sucked into the gap between the yokes and are held biased toward the blocking electromagnets 9a and 9b. Therefore, it is possible to prevent the magnetic ink 3 from flowing to the intermediate guide 1b.

このようにして印字するが、印字を終了し、装置電源を
断にすると、保持電磁石7、阻止電磁石9aおよび9b
が非励磁となって磁性インク3を保持できなくなる。こ
の結果阻止ヨーク8aと阻止ヨーク8b間、阻止ヨーク
8Cと阻止ヨーク8d間のそれぞれのギャップに保持さ
れていた磁性インク3が自重により傾斜面1cへ落下し
、この傾斜面1cに沿って保持ヨーク5と保持ヨーク6
間のギャップへ流れ込む。この磁性インク3と、保持ヨ
ーク5と保持ヨーク6間のギャップに既に保持されてい
た磁性インク3も自重により下降し、インク容器3内へ
戻る。
Printing is performed in this way, but when printing is finished and the device power is turned off, the holding electromagnet 7, blocking electromagnets 9a and 9b
becomes de-energized and cannot hold the magnetic ink 3. As a result, the magnetic ink 3 held in the gap between the blocking yoke 8a and the blocking yoke 8b and between the blocking yoke 8C and the blocking yoke 8d falls to the inclined surface 1c due to its own weight, and moves along this inclined surface 1c to the holding yoke. 5 and retaining yoke 6
flows into the gap between. This magnetic ink 3 and the magnetic ink 3 already held in the gap between the holding yoke 5 and the holding yoke 6 also descend due to their own weight and return into the ink container 3.

以上説明したように実施例では、保持電磁石7を非励磁
とすることにより、印字ワイヤ2の先端部に保持されて
いた磁性インク3をインク容器4へ戻すことができる。
As explained above, in the embodiment, by de-energizing the holding electromagnet 7, the magnetic ink 3 held at the tip of the printing wire 2 can be returned to the ink container 4.

このだめ印字ワイヤ2の先端部に吸い上げられ、保持さ
れる磁性インクの濃度は常にインク容器3内の磁性イン
ク濃度と同じになり、印字不良を生じることがなくなる
。また阻止ヨーク8ap8b、Be、8dによシ磁性イ
ンク3が阻止されるので、ワイヤ駆動部に磁性インク3
が入シ込み印字動作不良をおこすことがない。まだ傾斜
面1cにより磁性インク3を回収し再利用できる。
The concentration of the magnetic ink sucked up and held by the tip of the printing wire 2 is always the same as the concentration of the magnetic ink in the ink container 3, and printing defects will not occur. Also, since the magnetic ink 3 is blocked by the blocking yokes 8ap8b, Be, and 8d, the magnetic ink 3 is
There is no possibility of printing errors caused by ink marks. The magnetic ink 3 can still be collected and reused by the inclined surface 1c.

まだ本発明はシリアルプリンタ、ラインプリンタに利用
でき、例えばシリアルプリンタでは印字ヘッドをホーム
ポジションへ復帰するときに保持電磁石を非励磁とすれ
ばよく、ラインプリンタでは電源断まで保持電磁石を励
磁しておくと良い。
The present invention can still be used in serial printers and line printers; for example, in a serial printer, the holding electromagnet may be de-energized when returning the print head to the home position, while in a line printer, the holding electromagnet is kept energized until the power is turned off. Good.

以上詳細に説明したように本発明によれば、電磁石を非
励磁とするだけで、印字ワイヤ先端部に保持されていた
磁性インクをインク容器へ戻すことができる。このため
印字ワイヤの先端部に保持される磁性インクの濃度をイ
ンク容器内の磁性インクの濃度とほぼ同じに保つととが
でき、磁性1ンクの高濃化、固化等に伴なう印字不良が
なくなる効果がある。
As described in detail above, according to the present invention, the magnetic ink held at the tip of the printing wire can be returned to the ink container simply by de-energizing the electromagnet. Therefore, it is possible to keep the concentration of the magnetic ink held at the tip of the printing wire almost the same as the concentration of the magnetic ink in the ink container, resulting in printing defects due to high concentration and solidification of the magnetic 1 ink. It has the effect of eliminating

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

第1図(a) t (b)および(、)は本発明の一実
施例を示す図であり、(、)は正面図、(b)は半断面
平面図、(C)は半断面側面図、第2図は実施例の動作
説明図である。 1・・・ノーズフレーム、1a・・・先端ワイヤガイド
、1b・・・中間ワイヤガイド、IC・・・傾斜面、2
・・・印字ワイヤ、3・・・磁性インク、4・・・イン
ク容器、5および6・・・保持ヨーク、7・・・保持電
磁石、8a〜8d・・・阻止ヨーク、9aおよび9b・
・・阻止電磁石。 特許出願人 沖電気工業株式会社
1(a), t(b) and (,) are views showing one embodiment of the present invention, (,) is a front view, (b) is a half-sectional plan view, and (C) is a half-sectional side view. FIG. 2 is an explanatory diagram of the operation of the embodiment. DESCRIPTION OF SYMBOLS 1... Nose frame, 1a... Tip wire guide, 1b... Intermediate wire guide, IC... Inclined surface, 2
... Printing wire, 3... Magnetic ink, 4... Ink container, 5 and 6... Holding yoke, 7... Holding electromagnet, 8a to 8d... Blocking yoke, 9a and 9b.
...Blocking electromagnet. Patent applicant Oki Electric Industry Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 磁性インクを印字ワイヤの先端部に付着し、印字ワイヤ
を、突出することKより磁性インクを印字媒体へ転写す
るインパクト式プリンタにおいて、印字ヘッドの下方に
設けた磁性インクを貯留するインク容器と、インク容器
から磁性インクを吸い上げ印字ワイヤへ導くギャップを
形成したヨークと、このヨーク間のギャップに磁場を形
成し、かつ該磁場を電気的に消滅させ得る磁束生成手段
とを備えたことを特徴とするイン・臂りト式プリンタ。
In an impact printer that transfers magnetic ink to a print medium by attaching magnetic ink to the tip of a print wire and protruding the print wire, an ink container for storing magnetic ink provided below a print head; The present invention is characterized by comprising a yoke forming a gap for sucking up magnetic ink from an ink container and guiding it to a printing wire, and a magnetic flux generating means capable of forming a magnetic field in the gap between the yokes and electrically extinguishing the magnetic field. An in-rest type printer.
JP15402482A 1982-09-06 1982-09-06 Impact type printer Pending JPS5942972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15402482A JPS5942972A (en) 1982-09-06 1982-09-06 Impact type printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15402482A JPS5942972A (en) 1982-09-06 1982-09-06 Impact type printer

Publications (1)

Publication Number Publication Date
JPS5942972A true JPS5942972A (en) 1984-03-09

Family

ID=15575234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15402482A Pending JPS5942972A (en) 1982-09-06 1982-09-06 Impact type printer

Country Status (1)

Country Link
JP (1) JPS5942972A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152874A (en) * 1983-02-22 1984-08-31 Tokyo Electric Co Ltd Dot printer
US4599629A (en) * 1983-06-10 1986-07-08 Tokyo Electric Co., Ltd. Magnetic ink dot printer with means for controlling print density
US4696589A (en) * 1984-10-26 1987-09-29 Tokyo Electric Co., Ltd. Ink-dot printer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59152874A (en) * 1983-02-22 1984-08-31 Tokyo Electric Co Ltd Dot printer
US4599629A (en) * 1983-06-10 1986-07-08 Tokyo Electric Co., Ltd. Magnetic ink dot printer with means for controlling print density
US4696589A (en) * 1984-10-26 1987-09-29 Tokyo Electric Co., Ltd. Ink-dot printer

Similar Documents

Publication Publication Date Title
US4136978A (en) High speed electromagnetic printing head
JPS5942972A (en) Impact type printer
EP0140658B1 (en) Ink dot printer
EP0128558B1 (en) Ink dot printer
JPS58147373A (en) Ink jet printer
JPS5942973A (en) Impact type wire dot printing head
JPS604071A (en) Dot printer
JPH0239388B2 (en)
US4984911A (en) Ink dot printer
JPS5948165A (en) Printer
JPS5943144U (en) wire print head
JPS604073A (en) Dot printer
JPS58187375A (en) Printing head
JPH1052926A (en) Maintenance method for wire dot printer head and device therefor
JPS5836471A (en) Printing stylus driver for printer
JPH04163057A (en) Impact dot head
JPH03281354A (en) Dot printer head
JPH01262144A (en) Printer
JPS604074A (en) Dot printer
JPH0428B2 (en)
JPH0427B2 (en)
JPS5940626A (en) Iron fluid type information display method and apparatus
JPH06115063A (en) Ink jet recording method
JPS6048393A (en) Printing apparatus
JPS6313767A (en) Printing method