JPH03221471A - Led printer - Google Patents
Led printerInfo
- Publication number
- JPH03221471A JPH03221471A JP2017211A JP1721190A JPH03221471A JP H03221471 A JPH03221471 A JP H03221471A JP 2017211 A JP2017211 A JP 2017211A JP 1721190 A JP1721190 A JP 1721190A JP H03221471 A JPH03221471 A JP H03221471A
- Authority
- JP
- Japan
- Prior art keywords
- led head
- gap
- photosensitive drum
- led
- 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.)
- Pending
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims 2
- 230000007246 mechanism Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000008531 maintenance mechanism Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Led Devices (AREA)
- Dot-Matrix Printers And Others (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はＬＥＤプリンタにおいてＬＥＤヘッドと感光体
間のギャップを精度よく維持するギャップ保持機構に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a gap holding mechanism for accurately maintaining a gap between an LED head and a photoreceptor in an LED printer.
第１図にＬＥＤプリンタの構成を模式的に示した。感光
ドラム１は電子写真方式による印刷の潜像を形成する感
光体である。感光ドラム１の表面は、帯電器２によって
一様に帯電される（約７００Ｖ）。−様に帯電された感
光ドラム１は、ＬＥＤヘッド３によって、印刷データ信
号に対応した露光が行なわれて印刷データの静電潜像を
形成する。ＬＥＤヘッド３は、印刷の画素であるドツト
数に対応したＬＥＤ （発光ダイオード）を−列に並べ
たＬＥＤアレイ３ａとＬＥＤアレイ３ａを駆動するＬＥ
Ｄドライバ３ｂとこれらを実装したセラミック基板３ｃ
とＬＥＤヘッド１の基台となるＬＥＤヘッドベース３ｄ
及びＬＥＤアレイ３ａの光を自己集光して感光ドラム１
の上に結像するためのセルフォックレンズ３０等で構成
されている。感光ドラム１上の前記静電潜像は、現像機
４でトナーが付着されて可視化されたトナー像で現像さ
れる。一方、用紙カセット６の印刷用紙５はピックアッ
プローラ７で取り出され、インプットローラ８を介して
感光ドラム１に向かって送り出される。FIG. 1 schematically shows the configuration of an LED printer. The photosensitive drum 1 is a photosensitive member that forms a latent image printed by electrophotography. The surface of the photosensitive drum 1 is uniformly charged (approximately 700 V) by the charger 2. The photosensitive drum 1 charged in the negative direction is exposed by the LED head 3 to light corresponding to the print data signal, thereby forming an electrostatic latent image of the print data. The LED head 3 includes an LED array 3a in which LEDs (light emitting diodes) corresponding to the number of dots that are printing pixels are arranged in a row, and an LED that drives the LED array 3a.
D driver 3b and ceramic substrate 3c on which these are mounted
and an LED head base 3d which is the base of the LED head 1.
and the light of the LED array 3a is self-condensed to the photosensitive drum 1.
It is composed of a SELFOC lens 30 and the like for forming an image on the image. The electrostatic latent image on the photosensitive drum 1 is developed into a visualized toner image by adhering toner in a developing device 4. On the other hand, the printing paper 5 from the paper cassette 6 is taken out by a pickup roller 7 and sent toward the photosensitive drum 1 via an input roller 8.
インプットローラ８を通った用紙５は、裏面から転写コ
ロナ９ａの高電圧が印加され、感光ドラム１上の前記ト
ナー像を転写する。続いてはく離コロナ９ｂによって用
紙５は感光ドラム１からはく離される。はく離された用
紙５は搬送ベルト１０を通ってヒートローラ１３に入い
る。バックアップローラ１４による押圧とヒートローラ
１３の熱によって用紙５のトナー像は加熱押圧されて用
紙５に定着する。トナー像が定着された用紙５は、プラ
ーローラ１５で取り出されて、アウトプットトレイ１６
に蓄積される。A high voltage of a transfer corona 9a is applied to the paper 5 that has passed through the input roller 8 from the back side, and the toner image on the photosensitive drum 1 is transferred thereto. Subsequently, the paper 5 is peeled off from the photosensitive drum 1 by the peeling corona 9b. The separated paper 5 passes through the conveyor belt 10 and enters the heat roller 13. The toner image on the paper 5 is heated and pressed by the pressure from the backup roller 14 and the heat from the heat roller 13, and is fixed on the paper 5. The paper 5 on which the toner image has been fixed is taken out by a puller roller 15 and transferred to an output tray 16.
is accumulated in
転写コロナ９ａ及びはく離コロナ９ｂの部位で感光ドラ
ム１上のトナー像を用紙５に転写させた感光トラム１は
、クリーナ１１の部位で転写されずに残ったトナーを除
去する清掃が行われる。クリーナ↓１は、クリーナブラ
シｌｌａとフリッカバー１１ｂとクリーナハウジングｌ
ｌｃで構成され、クリーナブラシｌｌａで感光ドラム１
上に残留しているトナーを掃き取り、クリーナブラシ１
１ａの毛に付着したトナーは、フリッカバー１１ｂにた
たかれることによってクリーナブラシ１１ａより離され
、クリーナハウジングｌｌｃ内の吸気にのって回収され
る。The photosensitive tram 1, which has transferred the toner image on the photosensitive drum 1 onto the paper 5 at the transfer corona 9a and the peeling corona 9b, is cleaned at the cleaner 11 to remove the toner remaining without being transferred. Cleaner ↓1 consists of cleaner brush lla, flicker cover 11b, and cleaner housing l
It consists of a photosensitive drum 1 with a cleaner brush lla.
Sweep up the toner remaining on the top and use cleaner brush 1.
The toner attached to the bristles of the brush 1a is struck by the flicker bar 11b, separated from the cleaner brush 11a, and collected by the suction air inside the cleaner housing llc.
残留トナーの清掃が行われた感光ドラム１の表面は、イ
レーズランズ１２によって除電され、次の帯電工程で電
位むらがない−様な帯電ができるように作動している。The surface of the photosensitive drum 1, which has been cleaned of residual toner, is neutralized by the erase lands 12, and operates so that it can be charged without potential unevenness in the next charging process.
帯電工程から次の印刷プロセスが始まる。The next printing process begins with the charging step.
上記した一連の動作を繰り返すことで連続的に印刷が行
われる。Printing is performed continuously by repeating the series of operations described above.
第１図に示すようなＬＥＤプリンタにおいて、セルフォ
ックレンズ３ｅの焦点深度が約０．３ｍｍ程度であるた
め、感光ドラムｌに偏心があったり、また、感光ドラム
１の支持機構に芯ずれがある場合に感光ドラム１上の静
電潜像が場所によって（偏心、芯ずれの大きい場所に相
当している。）結像ぼけしていることがある。In the LED printer shown in FIG. 1, the depth of focus of the SELFOC lens 3e is approximately 0.3 mm, so the photosensitive drum 1 may be eccentric, or the supporting mechanism of the photosensitive drum 1 may be misaligned. In some cases, the electrostatic latent image on the photosensitive drum 1 may be blurred depending on the location (corresponding to a location where eccentricity or misalignment is large).
結像ぼけを起していると、現像した場合にトナーの付着
が整然としていないため、不鮮明な印刷結果となる状況
にあった。If the image formation is blurred, the toner is not adhered in an orderly manner when it is developed, resulting in an unclear print result.
感光ドラム１の偏心量と支持機構の芯ずれ量を合計で０
．３ｍｍ以下に抑えることは、加工精度、組立精度、熱
膨張などの変動の点を考慮するときわめて難しく、この
欠点に対して従来技術では第２図に示すようにＬＥＤヘ
ッド３の支持体である取付ホルダ２２を突当ローラ２３
を介して感光ドラム１に突当てることで偏心、芯ずれに
対してＬＥＤヘッド３が感光ドラム１に対して一定のギ
ャップが維持できるようにしていた。The total eccentricity of the photosensitive drum 1 and the misalignment of the support mechanism are 0.
．． It is extremely difficult to keep the thickness to 3 mm or less when considering fluctuations in processing accuracy, assembly accuracy, thermal expansion, etc. In order to overcome this drawback, conventional technology has developed a mounting system that is a support for the LED head 3, as shown in Figure 2. The holder 22 is pressed against the abutting roller 23
By abutting against the photosensitive drum 1 through the LED head 3, a constant gap can be maintained between the LED head 3 and the photosensitive drum 1 against eccentricity and misalignment.
第２図においてＬＥＤヘッド３は、ＬＥＤヘッド取付ホ
ルダ２２に取付けられ、感光ドラムｌと対向している。In FIG. 2, the LED head 3 is attached to an LED head attachment holder 22 and faces the photosensitive drum l.
ＬＥＤヘッド取付ベース２２の両側に突当ローラ２３ａ
、２３ｂが取付けられて感光ドラム↓の外周にならって
ＬＥＤヘッド３の位置（上下方向）が変化する構造にな
っている。Abutment rollers 23a are provided on both sides of the LED head mounting base 22.
, 23b are attached so that the position (vertical direction) of the LED head 3 changes along the outer periphery of the photosensitive drum ↓.
ＬＥＤヘッド取付ホルダ２２は、奥行き方向に位置を変
えないように、図示していない案内溝で拘束されている
かまたは板バネ等で保持される構成になる。The LED head attachment holder 22 is configured to be restrained by a guide groove (not shown) or held by a plate spring or the like so as not to change its position in the depth direction.
押圧スプリング２４ａ、２４ｂは、突当ローラ２３ａ、
２３ｂと感光ドラム１の接触状態が崩れるのを防止する
ために予圧を与えている。The pressing springs 24a, 24b are abutting rollers 23a,
A preload is applied to prevent the contact between the photosensitive drum 23b and the photosensitive drum 1 from breaking.
ドラムモータ２５は感光ドラム１を駆動するモータで、
一定の速度で感光ドラム１を回転させるためにステッピ
ングモータ等が用いられる。伝達ベルト２６は、ドラム
モータ２５の動力を感光ドラム１に伝える。The drum motor 25 is a motor that drives the photosensitive drum 1.
A stepping motor or the like is used to rotate the photosensitive drum 1 at a constant speed. The transmission belt 26 transmits the power of the drum motor 25 to the photosensitive drum 1.
ＬＥＤヘッド３と感光ドラム１とのギャップは、突当ロ
ーラ２３ａ、２３ｂの上下方向の位置を調整して所定の
ギャップ値に合わせられる。The gap between the LED head 3 and the photosensitive drum 1 is adjusted to a predetermined gap value by adjusting the vertical positions of the abutment rollers 23a and 23b.
係る第２図のようなギャップ維持機構を採ったＬＥＤプ
リンタにおいて、■突当ローラ２３ａ、２３ｂと感光ド
ラム１の表面との間にトナーが浸入し、そのトナーが圧
着して堆積するため、ギャップがずれてしまう。また、
■突当ローラ２３ａ２３ｂによって感光ドラム１の表面
が損傷されて、現像機におけるバイアス電圧がリークし
て。In an LED printer that employs a gap maintenance mechanism as shown in FIG. becomes misaligned. Also,
(2) The surface of the photosensitive drum 1 is damaged by the abutting roller 23a23b, and the bias voltage in the developing machine leaks.
印刷品質が損われるという問題があった。There was a problem that print quality was impaired.
本発明の目的は、突当ローラ方式におけるトナー堆積に
起因するギャップ変動、更に突当ローラによる感光ドラ
ム表面の損傷に起因する現像バイアス電圧のリークによ
る印刷品質の劣化を未然に防ぎ、かつ感光ドラムの偏心
と支持機構の芯ずれに伴なうギャップ変化を抑えること
である。It is an object of the present invention to prevent deterioration of print quality due to gap fluctuations caused by toner accumulation in the abutting roller method, as well as leakage of developing bias voltage caused by damage to the surface of the photosensitive drum caused by the abutting roller. The goal is to suppress gap changes due to eccentricity of the support mechanism and misalignment of the support mechanism.
本発明は、非接触状態で前記ギャップを維持できる方法
があれば、上記した問題が発生しないことに着目し、感
光ドラムの表面に近接して近接センサを設け、該センサ
よりのギャップ情報をフィードバックしてＬＥＤヘッド
を保持しているホルダの位置を制御することによって、
ＬＥＤヘッドを感光ドラム表面とのギャップが常に一定
になるように工夫したものである。The present invention focuses on the fact that the above-mentioned problems will not occur if there is a method that can maintain the gap in a non-contact state.The present invention provides a proximity sensor close to the surface of the photosensitive drum and feeds back gap information from the sensor. By controlling the position of the holder holding the LED head,
The LED head is designed so that the gap between it and the photosensitive drum surface is always constant.
本発明の実施例を第３図に示す。第３図において近接セ
ンサ３１が感光トラム１の偏心量と芯ずれ量の合計値を
検出する。近接センサ３１は、誘電性の感光ドラムの素
管（アルミ）との空隙（ギャップ）量に応じて、誘導電
圧がとり出せるように工夫したものである。An embodiment of the invention is shown in FIG. In FIG. 3, the proximity sensor 31 detects the total value of the eccentricity and misalignment of the photosensitive tram 1. The proximity sensor 31 is devised so that an induced voltage can be detected depending on the amount of the gap between the dielectric photosensitive drum and the tube (aluminum).
近接センサ３１の出力電圧は、サーボ制御回路３２にフ
ィードバックされて、プッシュプルソレノイド３４の電
流を変化させて、プランジャー３４ｃの出入りを制御す
る。ブツシュプレソレノイド３４は、コイル３４ａと磁
気回路を構成するための３−り３４ｂとプランジャー３
４ｃとプランジャ３４ｃに復帰力を与える圧縮バネ３４
ｄで構成される。近接センサ３１と感光ドラム１のギャ
ップが増して、近接センサ３１の出力電圧が小さくなる
と、サーボ制御回路３２は、コイル３４ａに流す電流値
を小さくし、プランジャー３４ｃが圧縮バネ３４ｄに押
されて突き出てきてＬＥＤヘッド取付ホルダ２２′を下
方に押し出してＬＥＤヘッド３を感光体ドラムエに近づ
けるように作動する。すなわち、感光ドラム１の表面が
偏心量や芯ずれ量に伴なって下方に下った時、上記の作
用動作でＬＥＤヘット３も下方に下がることでギャップ
が一定に保たれる。回転支軸３０は、ＬＥＤヘッド取付
ホルダ２２′の回転支点となる。抑圧スプリング機構３
３は、ＬＥＤヘッド取付ホルダ２２′の最下点を規制す
るストッパとプランジャー３４ｃとＬＥＤヘッド取付ホ
ルダ２２′の接触を確実にするためのバネ機構を具備さ
せている。The output voltage of the proximity sensor 31 is fed back to the servo control circuit 32 to change the current of the push-pull solenoid 34 to control the entry and exit of the plunger 34c. The push solenoid 34 includes a coil 34a, a three-way 34b for forming a magnetic circuit, and a plunger 3.
4c and a compression spring 34 that provides a return force to the plunger 34c.
Consists of d. When the gap between the proximity sensor 31 and the photosensitive drum 1 increases and the output voltage of the proximity sensor 31 decreases, the servo control circuit 32 reduces the current value flowing through the coil 34a, causing the plunger 34c to be pushed by the compression spring 34d. It protrudes and pushes out the LED head attachment holder 22' downward to move the LED head 3 closer to the photoreceptor drum. That is, when the surface of the photosensitive drum 1 moves downward due to the amount of eccentricity or misalignment, the LED head 3 also moves downward due to the above-described operation, thereby keeping the gap constant. The rotation support shaft 30 serves as a rotation support for the LED head attachment holder 22'. Suppression spring mechanism 3
Reference numeral 3 includes a stopper for regulating the lowest point of the LED head mounting holder 22' and a spring mechanism for ensuring the contact between the plunger 34c and the LED head mounting holder 22'.
ネジ３５は、ＬＥＤプリントヘッド３をＬＥＤヘッド取
付ホルダ２２′に取付けるための固定用ネジである。The screw 35 is a fixing screw for attaching the LED print head 3 to the LED head attachment holder 22'.
近接センサ３１と感光ドラム１のギャップが減少して、
近接センサの出力電圧が増した場合は、サーボ制御回路
３２は、コイル３４ａの電流を大きくする方向に作用し
、プランジャー３４ｃを吸引するためＬＥＤヘッド取付
ホルダ２２′は、上方に押し上げられる。この動作に伴
なってＬＥＤヘッド３も上方に移動するので、ＬＥＤヘ
ッド３と感光ドラム１のギャップが維持できる。The gap between the proximity sensor 31 and the photosensitive drum 1 is reduced,
When the output voltage of the proximity sensor increases, the servo control circuit 32 acts to increase the current in the coil 34a, and the LED head attachment holder 22' is pushed upward to attract the plunger 34c. Since the LED head 3 also moves upward with this operation, the gap between the LED head 3 and the photosensitive drum 1 can be maintained.
第４図に本発明の他の実施例を示す。第３図のプッシュ
プルソレノイド３４による直線運動に代えて１回転運動
を利用した構成である。ストロークカム３６は、回転角
に応じて回転軸からの距離が徐々に変わる形状のカムで
、ＬＥＤヘッド取付ホルダ２２′を徐々に変位させるた
めに供される。ストロークカム３６の能動（回転）には
、スッテッピングモータ３７が用いられる。近接センサ
３１の出力電圧に応じて、ステッピングモータ３７の回
転角が変わるようにサーボ制御回路３２で制御される。FIG. 4 shows another embodiment of the invention. This configuration utilizes one-rotation motion in place of the linear motion by the push-pull solenoid 34 shown in FIG. The stroke cam 36 is a cam whose distance from the rotation axis gradually changes depending on the rotation angle, and is used to gradually displace the LED head attachment holder 22'. A stepping motor 37 is used for active (rotating) the stroke cam 36. The servo control circuit 32 controls the stepping motor 37 so that the rotation angle of the stepping motor 37 changes according to the output voltage of the proximity sensor 31 .
制御動作は上記実施例で説明した内容と同様なので省略
する。The control operation is the same as that explained in the above embodiment, so a description thereof will be omitted.
本発明によれば、非接触状態でＬＥＤヘッドと感光体ド
ラムとの空隙（ギャップ）を高精度に維持できるので、
鮮明な印刷結果が得られる。また、接触方式に起因する
感光ドラムの損傷も未然に防止できるので、現像バイア
ス電圧のリーク等の障害も発生せず、信頼性の向上が図
れる。According to the present invention, the gap between the LED head and the photoreceptor drum can be maintained with high precision in a non-contact state.
Clear printing results can be obtained. Further, damage to the photosensitive drum due to the contact method can be prevented, so problems such as leakage of developing bias voltage do not occur, and reliability can be improved.
第１図はＬＥＤプリンタの一例を示す側面図、第２図は
従来のＬＥＤヘッドと感光体との間のギャップを維持す
る維持機構を示す正面図、第３図及び第４図は本発明の
実施例を示す側面図である図において、１は感光体、２
は帯電器、３はＬＥＤヘッド、４は現像器、５は用紙、
６は用紙カセット、７はピックアップローラ、８はイン
プットローラ、３０は回転支軸、３１は近接センサ３２
はサーボ制御回路、３３は押圧スプリング機構、３４は
プッシュプルソレノイド、３５はネジ、３６はストロー
クカム、３７はステッピングモータである。FIG. 1 is a side view showing an example of an LED printer, FIG. 2 is a front view showing a conventional maintenance mechanism that maintains the gap between an LED head and a photoreceptor, and FIGS. 3 and 4 are views of the present invention. In the figure which is a side view showing an example, 1 is a photoreceptor, 2
is a charger, 3 is an LED head, 4 is a developer, 5 is paper,
6 is a paper cassette, 7 is a pickup roller, 8 is an input roller, 30 is a rotating shaft, 31 is a proximity sensor 32
3 is a servo control circuit, 33 is a pressing spring mechanism, 34 is a push-pull solenoid, 35 is a screw, 36 is a stroke cam, and 37 is a stepping motor.
Claims (1)
るＬＥＤヘッドによって感光体上に静電潜像を形成する
ようにしたＬＥＤプリンタであって、 前記ＬＥＤヘッドを取り付け支持する取付手段と、ＬＥ
Ｄヘッド近傍に設けられ、感光体表面との間のギャップ
の変動を検出する近傍センサと、前記取付手段を介して
ＬＥＤヘッドを感光体に対して進退させる駆動手段と、
前記近接センサの検出出力を入力とし、該検出出力に対
応して駆動手段に駆動信号を供給するサーボ制御手段と
を備えたことを特徴とするＬＥＤプリンタ。[Scope of Claims] An LED printer that forms an electrostatic latent image on a photoreceptor using an LED head consisting of complex LEDs provided along the width direction of a photoreceptor, the LED head being attached to the photoreceptor. supporting mounting means, and LE
a proximity sensor that is provided near the D head and detects variations in the gap between the LED head and the photoreceptor surface; and a drive means that moves the LED head forward and backward relative to the photoreceptor via the mounting means;
An LED printer comprising: servo control means that receives the detection output of the proximity sensor as an input and supplies a drive signal to the drive means in response to the detection output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017211A JPH03221471A (en) | 1990-01-26 | 1990-01-26 | Led printer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017211A JPH03221471A (en) | 1990-01-26 | 1990-01-26 | Led printer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03221471A true JPH03221471A (en) | 1991-09-30 |
Family
ID=11937611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017211A Pending JPH03221471A (en) | 1990-01-26 | 1990-01-26 | Led printer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03221471A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04246668A (en) * | 1991-01-31 | 1992-09-02 | Kyocera Corp | Method for assembling image forming device |
| US7502045B2 (en) | 2005-01-06 | 2009-03-10 | Konica Minolta Business Technologies, Inc. | Image forming apparatus with LED head |
| US20090322810A1 (en) * | 2008-06-25 | 2009-12-31 | Seiko Epson Corporation | Fluid ejecting apparatus and fluid ejecting method |
-
1990
- 1990-01-26 JP JP2017211A patent/JPH03221471A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04246668A (en) * | 1991-01-31 | 1992-09-02 | Kyocera Corp | Method for assembling image forming device |
| US7502045B2 (en) | 2005-01-06 | 2009-03-10 | Konica Minolta Business Technologies, Inc. | Image forming apparatus with LED head |
| US7880756B2 (en) | 2005-01-06 | 2011-02-01 | Konica Minolta Business Technologies, Inc. | Image forming apparatus |
| US20090322810A1 (en) * | 2008-06-25 | 2009-12-31 | Seiko Epson Corporation | Fluid ejecting apparatus and fluid ejecting method |
| US8388082B2 (en) * | 2008-06-25 | 2013-03-05 | Seiko Epson Corporation | Fluid ejecting apparatus and fluid ejecting method |
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