JPS6136776A - Transfer device of electronic copying machine - Google Patents
Transfer device of electronic copying machineInfo
- Publication number
- JPS6136776A JPS6136776A JP15758084A JP15758084A JPS6136776A JP S6136776 A JPS6136776 A JP S6136776A JP 15758084 A JP15758084 A JP 15758084A JP 15758084 A JP15758084 A JP 15758084A JP S6136776 A JPS6136776 A JP S6136776A
- Authority
- JP
- Japan
- Prior art keywords
- shield
- copy
- copy form
- transfer
- copy paper
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
- G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
- G03G15/163—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
- G03G15/1635—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
- G03G15/165—Arrangements for supporting or transporting the second base in the transfer area, e.g. guides
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野）
本発明は、電子複写機の転写装置に関するものであり、
特に、高い湿度環境下においても、良好なコピー濃度が
得られるようにした電子複写様の転写装置に関するもの
である。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a transfer device for an electronic copying machine.
In particular, the present invention relates to an electronic copying type transfer device that can obtain good copy density even in a high humidity environment.
（従来の技術）
従来の電子複写機の転写装置の概略を第４図および第５
図に示す。図において、１は感光ドラム、２はコピー用
紙を案内するシュート、３はコピー用紙を帯電させるた
めの直流放電を用いた転写コロトロン、４は１００ＭΩ
程度の抵抗である。該転写コロトロン３はアースされた
シールド３ａとワイヤ３ｂとによって構成されている。(Prior Art) The outline of a transfer device of a conventional electronic copying machine is shown in Figs. 4 and 5.
As shown in the figure. In the figure, 1 is a photosensitive drum, 2 is a chute that guides the copy paper, 3 is a transfer corotron that uses DC discharge to charge the copy paper, and 4 is 100 MΩ.
This is a degree of resistance. The transfer corotron 3 is composed of a grounded shield 3a and a wire 3b.
このような転写装置において、コピー用紙がシュート２
を通って転写コロトロン３の位置に来ると、転写コロト
ロン３の放電によって該コピー用紙の裏面に電荷が帯電
される。一方、感光ドラム１の表面には、原稿情報に対
応したトナー像が形成されており、該トナー像が感光ド
ラム１の回転によって、転写コロトロン３と対向する位
置に担持されてくる。In such a transfer device, the copy paper is transferred to the chute 2.
When the copy paper passes through the transfer corotron 3 and reaches the transfer corotron 3, the back surface of the copy paper is charged with an electric charge due to the discharge of the transfer corotron 3. On the other hand, a toner image corresponding to document information is formed on the surface of the photosensitive drum 1, and as the photosensitive drum 1 rotates, the toner image is carried at a position facing the transfer corotron 3.
この時、前記コピー用紙の裏面に付着した電荷と、前記
トナーが有する電荷とは逆極性であるので、感光ドラム
１の表面に付着しているトナー像はコピー用紙の方に吸
引され、コピー用紙の表側の面にトナーが移される。こ
のようにして、感光ドラム１上のトナー像は次々にコピ
ー用紙に転写され、転写されたコピー用紙は、図示され
ていない定着装置に向かって搬送される。At this time, since the electric charge attached to the back side of the copy paper and the electric charge possessed by the toner are opposite in polarity, the toner image attached to the surface of the photosensitive drum 1 is attracted toward the copy paper, and the toner image is attracted to the copy paper. Toner is transferred to the front side of the . In this way, the toner images on the photosensitive drum 1 are transferred one after another onto copy paper, and the transferred copy paper is conveyed toward a fixing device (not shown).
〈発明が解決しようとする問題点）
ところで、複写機が高湿度の環境下にある場合には、コ
ピー用紙が含水し、コピー用紙の抵抗が下ることになる
。<Problems to be Solved by the Invention> By the way, when a copying machine is in a high humidity environment, copy paper becomes hydrated and the resistance of the copy paper decreases.
そうすると、第４図の転写装置においては、転写コロト
ロン３によってコピー用紙に帯電された電荷はシュート
２を通ってリークする。また、転写コロトロン３のシー
ルド３ａにコピー用紙が接触又は接近すると、コピー用
紙に帯電された電荷は該シールド３ａを通ってリーク又
は放電することになる。Then, in the transfer apparatus shown in FIG. 4, the electric charge charged to the copy paper by the transfer corotron 3 leaks through the chute 2. Further, when the copy paper comes into contact with or approaches the shield 3a of the transfer corotron 3, the electric charge charged on the copy paper leaks or is discharged through the shield 3a.
一方、第５図の転写装置では、抵抗４によってシュート
２が高い電圧に保持されているため、コピー用紙に帯電
された電荷がシュート２を通ってリークすることは低減
される。しかし、前述のように、コピー用紙が転写コロ
トロン３のシールド３ａに接触又は接近すると、コピー
用紙の帯電電荷はシールド３ａを通ってリーク又は放電
される。On the other hand, in the transfer device shown in FIG. 5, since the chute 2 is held at a high voltage by the resistor 4, leakage of electric charges on the copy paper through the chute 2 is reduced. However, as mentioned above, when the copy paper contacts or approaches the shield 3a of the transfer corotron 3, the electrical charge on the copy paper leaks or discharges through the shield 3a.
このようにして、コピー用紙の電位が低下すると、感光
ドラム１とコピー用紙との間に転写に必要な電界が得ら
れなくなり、コピー濃度が急激に低下し、良好なコピー
が得られなくなるという問題点があった。実験的には、
前記した第４図および第５図の転写装置においては、コ
ピー用紙の含水率が８％を越えると、コピー濃度が急激
に低下した。In this way, when the potential of the copy paper decreases, the electric field necessary for transfer cannot be obtained between the photosensitive drum 1 and the copy paper, and the copy density rapidly decreases, making it impossible to obtain good copies. There was a point. Experimentally,
In the transfer apparatus shown in FIGS. 4 and 5 described above, when the moisture content of the copy paper exceeded 8%, the copy density sharply decreased.
本発明は、前述の問題点を解決するためになされ１＝も
のである。The present invention has been made to solve the above-mentioned problems.
〈問題点を解決するための手段および作用）前記の問題
点を解決するために、本発明は、感光ドラムに対向して
配置され、シールドとその中に設けられたワイヤを有す
る転写コロトロンと、高抵抗を介して接地され、かつ前
記感光ドラムと転写コロトロンとの間に用紙を導く用紙
送行シュートとからなる電子複写機の転写装置において
、前記シールドをアースから直流的に遮断すると共に、
前記シールドと前記用紙送行シュートとを直接又は抵抗
を介して接続した点に特徴がある。(Means and operations for solving the problems) In order to solve the above-mentioned problems, the present invention provides a transfer corotron that is disposed opposite to the photosensitive drum and has a shield and a wire provided therein; In a transfer device of an electronic copying machine, which includes a paper feeding chute that is grounded through a high resistance and that guides paper between the photosensitive drum and the transfer corotron, the shield is electrically isolated from the ground, and
The present invention is characterized in that the shield and the paper feeding chute are connected directly or through a resistor.
（実施例） 以下に、図面を参照して、本発明の詳細な説明する。(Example) The present invention will be described in detail below with reference to the drawings.
第１図は本発明の一実施例の概略図である。FIG. 1 is a schematic diagram of one embodiment of the present invention.
図において５は、１００ＭΩ程度の第１の抵抗、６はシ
ュート２とシールド３ａとの闇に設けられた２０ＭΩ程
度の第２の抵抗、７はシールド３ａの電位をアースから
遮断するためのコンデンサであり、これは高抵抗でもよ
く、又これらの両方を直列又は並列に接続したものであ
ってもよい。なお、これら以外の符号は第４．５図と同
じ物又は同等物を示す。In the figure, 5 is a first resistor of about 100MΩ, 6 is a second resistor of about 20MΩ installed between the chute 2 and the shield 3a, and 7 is a capacitor for cutting off the potential of the shield 3a from the ground. This may be a high resistance, or both may be connected in series or in parallel. Note that the symbols other than these indicate the same or equivalent items as in Fig. 4.5.
また、第２図は本実施例の転写装置の特性を示し、横軸
に転写コロトロン印加電圧が取られ、縦軸にシュート流
入電流とシュートの自己バイアス電圧が取られている。Further, FIG. 2 shows the characteristics of the transfer device of this embodiment, in which the horizontal axis represents the voltage applied to the transfer corotron, and the vertical axis represents the chute inflow current and the self-bias voltage of the chute.
本実施例の転写コロトロン電圧は約５．４ＫＶで使用し
た結果、シュート流入電流は５〜６μＡ、シュートの自
己バイアス電圧は５００〜６００Ｖ程度になった。また
、シールド３ａの電位は６００〜７００Ｖ程度になった
。In this embodiment, the transfer corotron voltage was approximately 5.4 KV, and as a result, the chute inflow current was 5 to 6 μA, and the chute self-bias voltage was approximately 500 to 600 V. Further, the potential of the shield 3a was about 600 to 700V.
本実施例において、コピー用紙がシュート２の間を通っ
て転写コロトロン３の位置に送られてくると、コピー用
紙は、従来装置と同様にワイヤ３ｂとシールド３ａとの
間で発生している直流コロナ放電によって帯電させられ
る。今、コピー用紙の含水率が８％以上であるとすると
コピー用紙の表面抵抗が小さくなり、該用紙の帯電電荷
がシュート２あるいはシールド３ａを伝達してリークし
ようとするが、本実施例では、シュート２およびシール
ド３ａが高電圧に保持されているため、リークすること
はない。In this embodiment, when the copy paper is sent through the chute 2 to the transfer corotron 3, the copy paper is exposed to the direct current generated between the wire 3b and the shield 3a, as in the conventional device. Charged by corona discharge. Now, if the moisture content of the copy paper is 8% or more, the surface resistance of the copy paper becomes small, and the electrical charges on the paper tend to transmit and leak through the chute 2 or the shield 3a, but in this embodiment, Since the chute 2 and the shield 3a are maintained at a high voltage, there will be no leakage.
このため、コピー用紙と感光ドラム１との間に大きな電
界が生じ、感光ドラム１上に形成されているトナー像は
、コピー用紙が乾燥している時と略同様に、コピー用紙
に転写される。したがって、本実施例によれば、高湿度
の環境の下で複写機を稼動しても、コピー濃度が低下す
るのを防止することができる。Therefore, a large electric field is generated between the copy paper and the photosensitive drum 1, and the toner image formed on the photosensitive drum 1 is transferred to the copy paper in almost the same way as when the copy paper is dry. . Therefore, according to this embodiment, even if the copying machine is operated in a high humidity environment, it is possible to prevent the copy density from decreasing.
第３図は本発明の他の実施例を示す。この実施例が前記
第１実施例と異なる点は、コロトロン８のシールド８ａ
を共通にして、直流が印加される転写コロトロンワイヤ
８ｂと、交流が印加される剥離コロトロンワイヤ８Ｃを
設けた点、およびシールド８ａを交流的にアースするた
めに、抵抗９とコンデンサ１０の直列接続回路をシール
ド８ａとアース問に設けた点である。これ以外は、第１
実施例と同−又は同等である。FIG. 3 shows another embodiment of the invention. This embodiment differs from the first embodiment in that the shield 8a of the corotron 8
A transfer corotron wire 8b to which a direct current is applied and a peeled corotron wire 8C to which an alternating current is applied are provided, and in order to ground the shield 8a in an alternating current manner, a resistor 9 and a capacitor 10 are connected. The point is that a series connection circuit is provided between the shield 8a and the ground. Other than this, the first
Same as or equivalent to the example.
本実施例においても、シュート２およびシールド８ａは
、それぞれ５００〜６００Ｖおよび６００〜７００Ｖ程
度の直流電位を有するので、第１実施例と同様の効果が
ある。In this embodiment as well, the chute 2 and the shield 8a have DC potentials of about 500 to 600 V and 600 to 700 V, respectively, so that the same effects as in the first embodiment can be obtained.
なお、上記の第１および第２実施例においてはシュート
２とシールド３ａ又はシュート２とシールド８ａとの間
に第２の抵抗６を設けたがこれは必ずしも設ける必要は
ない。In the first and second embodiments described above, the second resistor 6 is provided between the chute 2 and the shield 3a or between the chute 2 and the shield 8a, but this is not necessarily required.
（発明の効果）
以上の説明から明らかなように、本発明によれば、つぎ
のような効果が達成される。(Effects of the Invention) As is clear from the above description, according to the present invention, the following effects are achieved.
（１）本発明によれば、第６図の実線ａに示されている
ように、コピー用紙の含水率が１１％位になっても、転
写抜けのないきれいなコピーが得られた。なお、点線す
は従来装置の特性を示す。(1) According to the present invention, as shown by the solid line a in FIG. 6, even when the moisture content of the copy paper was about 11%, clean copies without transfer omissions could be obtained. Note that the dotted line indicates the characteristics of the conventional device.
（′２Ｊ 簡単な構成であるので、安価に実施できる
。('2J Since it has a simple configuration, it can be implemented at low cost.
第１図は本発明の第１実施例の概略図、第２図は第１図
の装置の特性図、第３図は本発明の第２実施例の概略図
、第４図および第５図は、それぞれ従来装置の概略図、
第６図は本発明の効果を示す特性図である。
１・・・感光ドラム、２・・・シュート、３・・・転写
コロトロン、３ａ・・・シールド、３ｂ・・・ワイヤ、
５・・・第１の抵抗、６・・・第２の抵抗、７・・・コ
ンデンサ、８・・・コロトロン、９・・・抵抗、１０・
・・コンデンサ代理人弁理士 平木通人 外１名
２１ 図
ｈ’ｆｐｙｏト０７＃Ｆ＃ｏｌＨ
才３圀FIG. 1 is a schematic diagram of a first embodiment of the present invention, FIG. 2 is a characteristic diagram of the device shown in FIG. 1, FIG. 3 is a schematic diagram of a second embodiment of the present invention, and FIGS. 4 and 5 are a schematic diagram of the conventional device, and
FIG. 6 is a characteristic diagram showing the effects of the present invention. 1... Photosensitive drum, 2... Chute, 3... Transfer corotron, 3a... Shield, 3b... Wire,
5... First resistor, 6... Second resistor, 7... Capacitor, 8... Corotron, 9... Resistor, 10...
...Condenser agent Patent attorney Michito Hiraki and 1 other person 21 Figure h'fpyoto07#F#olH Sai3kuni
Claims (1)
中に設けられたワイヤを有する転写コロトロンと、前記
感光ドラムと転写コロトロンとの間に用紙を導く高抵抗
を介して接地された用紙送行シュートとからなる電子複
写機の転写装置において、前記シールドをアースから直
流的に遮断すると共に、前記シールドと前記用紙送行シ
ュートとを直接又は抵抗を介して接続したことを特徴と
する電子複写機の転写装置。(1) Paper feeding grounded through a transfer corotron placed opposite the photosensitive drum and having a shield and a wire provided therein, and a high resistance that guides the paper between the photosensitive drum and the transfer corotron. A transfer device for an electronic copying machine comprising a chute, wherein the shield is electrically isolated from earth, and the shield and the paper feeding chute are connected directly or through a resistor. Transfer device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15758084A JPS6136776A (en) | 1984-07-30 | 1984-07-30 | Transfer device of electronic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15758084A JPS6136776A (en) | 1984-07-30 | 1984-07-30 | Transfer device of electronic copying machine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5019330A Division JPH0734134B2 (en) | 1993-01-11 | 1993-01-11 | Transfer peeling device for electronic copier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6136776A true JPS6136776A (en) | 1986-02-21 |
| JPH048795B2 JPH048795B2 (en) | 1992-02-18 |
Family
ID=15652798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15758084A Granted JPS6136776A (en) | 1984-07-30 | 1984-07-30 | Transfer device of electronic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6136776A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6197677A (en) * | 1984-10-15 | 1986-05-16 | ゼロツクス コーポレーシヨン | Electrophotostatic apparatus |
| US8013107B2 (en) | 2003-10-10 | 2011-09-06 | Asahi Kasei Chemicals Corporation | Process for producing polyalkylene terephthalate, process for producing polyalkylene terephthalate molding and polyalkylene terephthalate molding |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5571356U (en) * | 1978-11-07 | 1980-05-16 | ||
| JPS56110441U (en) * | 1980-01-28 | 1981-08-26 | ||
| JPS5728454U (en) * | 1980-07-24 | 1982-02-15 | ||
| JPS5767969A (en) * | 1980-10-16 | 1982-04-24 | Olympus Optical Co Ltd | Transcription device for electrophotographic copier for copying plural sheets |
| JPS57197572A (en) * | 1981-05-29 | 1982-12-03 | Sharp Corp | Corona discharger for transfer |
| JPS58108469U (en) * | 1982-01-18 | 1983-07-23 | 株式会社リコー | Copying machine transfer paper separation auxiliary device |
| JPS5930154U (en) * | 1982-08-18 | 1984-02-24 | 富士ゼロックス株式会社 | copier corotron device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5362133A (en) * | 1976-11-16 | 1978-06-03 | Nippon Musical Instruments Mfg | Method of manufacturing cap for battery |
| JPS5930154B2 (en) * | 1977-11-16 | 1984-07-25 | 株式会社東芝 | How to decolorize and purify human waste |
-
1984
- 1984-07-30 JP JP15758084A patent/JPS6136776A/en active Granted
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5571356U (en) * | 1978-11-07 | 1980-05-16 | ||
| JPS56110441U (en) * | 1980-01-28 | 1981-08-26 | ||
| JPS5728454U (en) * | 1980-07-24 | 1982-02-15 | ||
| JPS5767969A (en) * | 1980-10-16 | 1982-04-24 | Olympus Optical Co Ltd | Transcription device for electrophotographic copier for copying plural sheets |
| JPS57197572A (en) * | 1981-05-29 | 1982-12-03 | Sharp Corp | Corona discharger for transfer |
| JPS58108469U (en) * | 1982-01-18 | 1983-07-23 | 株式会社リコー | Copying machine transfer paper separation auxiliary device |
| JPS5930154U (en) * | 1982-08-18 | 1984-02-24 | 富士ゼロックス株式会社 | copier corotron device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6197677A (en) * | 1984-10-15 | 1986-05-16 | ゼロツクス コーポレーシヨン | Electrophotostatic apparatus |
| US8013107B2 (en) | 2003-10-10 | 2011-09-06 | Asahi Kasei Chemicals Corporation | Process for producing polyalkylene terephthalate, process for producing polyalkylene terephthalate molding and polyalkylene terephthalate molding |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH048795B2 (en) | 1992-02-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |