JPH06308793A - Printing device - Google Patents
Printing deviceInfo
- Publication number
- JPH06308793A JPH06308793A JP5097411A JP9741193A JPH06308793A JP H06308793 A JPH06308793 A JP H06308793A JP 5097411 A JP5097411 A JP 5097411A JP 9741193 A JP9741193 A JP 9741193A JP H06308793 A JPH06308793 A JP H06308793A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- paper
- drum
- photosensitive drum
- toner
- 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.)
- Withdrawn
Links
- 238000010586 diagram Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
- Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、印字装置に関し、特
にたとえば、給紙ローラによって給紙された用紙にドラ
ムの表面に付着したトナーを転写し、定着ローラによっ
て前記トナーを前記用紙に定着させる、印字装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus, and more particularly, to, for example, transferring toner adhering to the surface of a drum onto a sheet fed by a sheet feeding roller and fixing the toner onto the sheet by a fixing roller. , A printing device.
【０００２】[0002]
【従来の技術】従来の印字装置では、用紙の給紙から排
紙までの搬送経路が長かった。2. Description of the Related Art In a conventional printing apparatus, a conveyance path from paper feeding to paper ejection is long.
【０００３】[0003]
【発明が解決しようとする課題】これでは、搬送経路中
に、レジストローラや搬送ローラなどが必要であり、装
置を小型化する妨げとなっていた。それゆえに、この発
明の主たる目的は、小型の印字装置を提供することであ
る。In this case, registration rollers and conveyance rollers are required in the conveyance path, which hinders downsizing of the apparatus. Therefore, a main object of the present invention is to provide a compact printing device.
【０００４】[0004]
【課題を解決するための手段】この発明は、給紙ローラ
によって給紙された用紙にドラムの表面に付着したトナ
ーを圧接転写し、定着ローラによってトナーを用紙に定
着させる印字装置において、給紙ローラからドラムまで
の距離およびドラムから定着ローラまでの距離は用紙の
一辺より短くし、給紙ローラとドラムとによっておよび
ドラムと定着ローラとによって用紙を搬送するようにし
たことを特徴とする、印字装置である。SUMMARY OF THE INVENTION The present invention relates to a printing apparatus in which toner adhering to the surface of a drum is pressure-transferred to a sheet fed by a sheet feeding roller, and the toner is fixed on the sheet by a fixing roller. Printing is characterized in that the distance from the roller to the drum and the distance from the drum to the fixing roller are shorter than one side of the paper, and the paper is conveyed by the paper feeding roller and the drum and by the drum and the fixing roller. It is a device.
【０００５】[0005]
【作用】給紙ローラからドラムまでの距離とドラムから
定着ローラまでの距離とが、用紙の最小サイズより短い
ので、給紙ローラからドラムおよびドラムから定着ロー
ラへ用紙を確実に受け渡すことができる。したがって、
レジストローラや搬送ローラが不要となる。Since the distance from the paper feeding roller to the drum and the distance from the drum to the fixing roller are shorter than the minimum size of the paper, the paper can be reliably delivered from the paper feeding roller to the drum and from the drum to the fixing roller. . Therefore,
There is no need for registration rollers or conveyance rollers.
【０００６】[0006]
【発明の効果】この発明によれば、レジストローラや搬
送ローラなどが不要となるので、印字装置を小型化でき
る。この発明の上述の目的，その他の目的，特徴および
利点は、図面を参照して行う以下の実施例の詳細な説明
から一層明らかとなろう。According to the present invention, the registration roller and the conveying roller are not required, so that the printing apparatus can be downsized. The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments with reference to the drawings.
【０００７】[0007]
【実施例】図１を参照して、この実施例の印字装置１０
は、本体１２を含み、本体１２の上部中央に、印字すべ
き情報の光像を出力するＬＥＤヘッド１４が、真下に向
けて配置されている。出力された光像はＬＥＤヘッド１
４の下方に設けられた感光体ドラム１６の表面に照射さ
れる。この感光体ドラム１６は、ＬＥＤヘッド１４の左
側に配置された帯電ブラシ１８によってたとえばプラス
に帯電されており、光像が照射された部分だけマイナス
に帯電される。感光体ドラム１６は時計回り方向に回転
し、マイナスに帯電した部分が感光体ドラム１６の右側
面に位置する現像器２０に接触するため、現像器２０内
に含まれているプラスに帯電したトナー（図示せず）が
感光体ドラム１６表面のマイナス帯電部分に付着する。
なお、現像器２０は、本体１２の一部を兼ねており、適
宜着脱できる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a printer 10 of this embodiment.
Includes a main body 12, and an LED head 14 for outputting an optical image of information to be printed is arranged at the center of an upper portion of the main body 12 so as to face directly below. The output light image is the LED head 1
The surface of the photoconductor drum 16 provided below 4 is irradiated. The photoconductor drum 16 is, for example, positively charged by a charging brush 18 arranged on the left side of the LED head 14, and is negatively charged only in a portion irradiated with a light image. The photoconductor drum 16 rotates in the clockwise direction, and the negatively charged portion comes into contact with the developing device 20 located on the right side surface of the photoconductor drum 16, so that the positively charged toner contained in the developing device 20. (Not shown) adheres to the negatively charged portion on the surface of the photosensitive drum 16.
The developing device 20 also serves as a part of the main body 12, and can be appropriately attached and detached.
【０００８】感光体ドラム１６から右側に距離Ｄ1 だけ
離れた位置には、給紙ローラ２２が設けられており、こ
れによって用紙２４が給紙される。感光体ドラム１６の
下方には、感光体ドラム１６と平行に圧接させた転写ロ
ーラ２６が設けられており、これによって感光体ドラム
１６の表面に付着したトナーが用紙２４に転写される。
さらに、感光体ドラム１６から左側に距離Ｄ2 だけ離れ
た位置には、定着ローラ２８とパット３０とが設けられ
ており、定着ローラ２８の定着熱によってトナーが用紙
２４に定着され、その後用紙２４が排紙される。A paper feed roller 22 is provided at a position separated from the photosensitive drum 16 by a distance D 1 on the right side, and a paper 24 is fed by this. Below the photoconductor drum 16, a transfer roller 26 is provided in pressure contact with the photoconductor drum 16 in parallel, so that the toner attached to the surface of the photoconductor drum 16 is transferred to the paper 24.
Further, a fixing roller 28 and a pad 30 are provided on the left side of the photosensitive drum 16 by a distance D 2 , and the toner is fixed on the paper 24 by the fixing heat of the fixing roller 28, and then the paper 24 Is ejected.
【０００９】給紙ローラ２２から感光体ドラム１６まで
の距離Ｄ1 および感光体ドラム１６から定着ローラ２８
までの距離Ｄ2 は、用紙２４よりも短い。したがって、
用紙２４は給紙ローラ２２から感光体ドラム１６へ確実
に搬送され、転写ローラ２６によってトナーが用紙２４
に転写される。転写された用紙２４は定着ローラ２８ま
で確実に搬送され、定着ローラ２８とパット３０とによ
ってトナーが用紙２４に定着された後、排紙される。The distance D 1 from the paper feed roller 22 to the photosensitive drum 16 and the fixing roller 28 from the photosensitive drum 16
The distance D 2 to is shorter than the paper 24. Therefore,
The paper 24 is reliably conveyed from the paper feed roller 22 to the photoconductor drum 16, and the toner is transferred by the transfer roller 26 to the paper 24.
Is transcribed to. The transferred sheet 24 is reliably conveyed to the fixing roller 28, the toner is fixed on the sheet 24 by the fixing roller 28 and the pad 30, and then the sheet 24 is discharged.
【００１０】なお、感光体ドラム１６から定着ローラ２
８までの距離が従来に比べて短いが、低融点のトナーを
用い、プリント速度を従来の１／２とすることによっ
て、定着熱を低くすることができ、これによって感光体
ドラム１６の定着熱による熱劣化を防止できる。また、
この実施例では、感光体ドラム１６の周りにクリーニン
グユニットが配置されていないが、感光体１６表面の残
留トナーは帯電ブラシ１８によって感光体ドラム１６の
表面に薄く拡散されるため、トナーの残留による帯電む
らの発生を抑えることができ、さらにこの残留トナーは
現像器２０で回収されるため、特に問題はない。The photosensitive drum 16 to the fixing roller 2
Although the distance to 8 is shorter than that of the conventional one, the fixing heat can be lowered by using the low melting point toner and halving the printing speed of the conventional one, whereby the fixing heat of the photoconductor drum 16 can be reduced. It is possible to prevent thermal deterioration due to. Also,
In this embodiment, no cleaning unit is arranged around the photoconductor drum 16, but the residual toner on the surface of the photoconductor 16 is thinly diffused onto the surface of the photoconductor drum 16 by the charging brush 18, so that the toner remains. The occurrence of uneven charging can be suppressed, and since the residual toner is collected by the developing device 20, there is no particular problem.
【００１１】図２を参照して、他の実施例の印字装置１
０の構成は、図１に示す印字装置１０とほぼ同様である
ので、異なる点のみを説明し、その他の点の説明は省略
する。ＬＥＤヘッド１４は、感光体ドラム１６の上方や
や左側に設けられており、光像は感光体ドラム１６の真
上ではなく上方やや左側に照射される。また、帯電手段
としてコロトロン３２が感光体ドラム１６の左側面に設
けられており、コロトロン３２の下方に残留トナーによ
る帯電むらを防止するためのブラシ３４が配置されてい
る。ただし、このブラシ３４は、帯電むらの問題がなけ
れば不要である。Referring to FIG. 2, a printer 1 according to another embodiment.
Since the configuration of 0 is almost the same as that of the printer 10 shown in FIG. 1, only different points will be described, and description of other points will be omitted. The LED head 14 is provided slightly above and to the left of the photoconductor drum 16, and the light image is emitted to slightly above and to the left of the photoconductor drum 16. A corotron 32 as a charging unit is provided on the left side surface of the photoconductor drum 16, and a brush 34 for preventing uneven charging due to residual toner is arranged below the corotron 32. However, this brush 34 is unnecessary if there is no problem of uneven charging.
【００１２】感光体ドラム１６の下方には、転写ローラ
２６の代わりに転写フィルム３６が圧接されている。こ
の転写フィルム３６は、感光体ドラム１６の軸方向の長
さと同じ長さの導電性フィルムを略Ω状に成形したもの
であり、トナーと逆極性のバイアスが印加されている。
また、定着ローラ２８の下方には、パット３０の代わり
にプレスローラ３８が設けられている。A transfer film 36 is pressed below the photosensitive drum 16 instead of the transfer roller 26. The transfer film 36 is formed by forming a conductive film having the same length as the axial length of the photosensitive drum 16 into a substantially Ω shape, and a bias having a polarity opposite to that of the toner is applied.
A press roller 38 is provided below the fixing roller 28 instead of the pad 30.
【００１３】給紙ローラ２２によって給紙された用紙２
４は、図１実施例と同様に感光体ドラム１６の下方に挿
入され、転写フィルム３６によってトナーが用紙２４に
転写される。そして、定着ローラ２８とプレスローラ３
８とによってトナーが定着され、排紙される。この実施
例においても、給紙ローラ２２から感光体ドラム１６ま
での距離Ｄ1 および感光体ドラム１６から定着ローラ２
８までの距離Ｄ2 は、用紙２４より短いため、確実に用
紙２４を搬送することができる。Paper 2 fed by paper feed roller 22
4 is inserted below the photosensitive drum 16 as in the embodiment of FIG. 1, and the toner is transferred to the paper 24 by the transfer film 36. Then, the fixing roller 28 and the press roller 3
The toner is fixed by 8 and the paper is discharged. Also in this embodiment, the distance D 1 from the sheet feeding roller 22 to the photosensitive drum 16 and the fixing roller 2 from the photosensitive drum 16
Since the distance D 2 up to 8 is shorter than the paper 24, the paper 24 can be reliably transported.
【図１】この発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】この発明の他の実施例を示す回路図である。FIG. 2 is a circuit diagram showing another embodiment of the present invention.
１０ …印字装置 １４ …ＬＥＤヘッド １６ …感光体ドラム ２０ …現像器 ２２ …給紙ローラ ２８ …定着ローラ 10 ... Printing device 14 ... LED head 16 ... Photosensitive drum 20 ... Developing device 22 ... Paper feeding roller 28 ... Fixing roller
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ４１Ｊ 2/45 2/455 Ｂ６５Ｈ 5/06 Ｊ 7612−3Ｆ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location B41J 2/45 2/455 B65H 5/06 J 7612-3F
Claims (1)
ムの表面に付着したトナーを圧接転写し、定着ローラに
よって前記トナーを前記用紙に定着させる印字装置にお
いて、 前記給紙ローラから前記ドラムまでの距離および前記ド
ラムから前記定着ローラまでの距離は前記用紙の一辺よ
り短くし、前記給紙ローラと前記ドラムとによっておよ
び前記ドラムと前記定着ローラとによって前記用紙を搬
送するようにしたことを特徴とする、印字装置。1. A printing apparatus in which toner adhering to the surface of a drum is pressure-transferred to a sheet fed by a sheet feeding roller and the toner is fixed on the sheet by a fixing roller, from the sheet feeding roller to the drum. And the distance from the drum to the fixing roller are shorter than one side of the paper, and the paper is conveyed by the paper feeding roller and the drum and by the drum and the fixing roller. The printer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5097411A JPH06308793A (en) | 1993-04-23 | 1993-04-23 | Printing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5097411A JPH06308793A (en) | 1993-04-23 | 1993-04-23 | Printing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06308793A true JPH06308793A (en) | 1994-11-04 |
Family
ID=14191749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5097411A Withdrawn JPH06308793A (en) | 1993-04-23 | 1993-04-23 | Printing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06308793A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7252446B2 (en) | 2004-03-31 | 2007-08-07 | Brother Kogoy Kabushiki Kaisha | Image forming apparatus |
| JP2007226269A (en) * | 2007-05-17 | 2007-09-06 | Brother Ind Ltd | Image forming apparatus |
| US7515865B2 (en) | 2004-03-31 | 2009-04-07 | Brother Kogyo Kabushiki Kaisha | Recording medium feeding device and image forming apparatus |
| US7526226B2 (en) | 2004-03-31 | 2009-04-28 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having lowered image forming position and recessed sheet stacking portion |
-
1993
- 1993-04-23 JP JP5097411A patent/JPH06308793A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7252446B2 (en) | 2004-03-31 | 2007-08-07 | Brother Kogoy Kabushiki Kaisha | Image forming apparatus |
| US7312808B2 (en) | 2004-03-31 | 2007-12-25 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus and scanning unit |
| US7319476B2 (en) | 2004-03-31 | 2008-01-15 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus and scanning unit |
| US7410313B2 (en) | 2004-03-31 | 2008-08-12 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus |
| US7515865B2 (en) | 2004-03-31 | 2009-04-07 | Brother Kogyo Kabushiki Kaisha | Recording medium feeding device and image forming apparatus |
| US7526226B2 (en) | 2004-03-31 | 2009-04-28 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having lowered image forming position and recessed sheet stacking portion |
| US7720409B2 (en) | 2004-03-31 | 2010-05-18 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having lowered image forming position and recessed sheet stacking portion |
| US8417177B2 (en) | 2004-03-31 | 2013-04-09 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having lowered image forming position and recessed sheet stacking portion |
| JP2007226269A (en) * | 2007-05-17 | 2007-09-06 | Brother Ind Ltd | Image forming apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000704 |