JPS5833276A - Transfer electrode mechanism of transfer system electrophotographic device - Google Patents
Transfer electrode mechanism of transfer system electrophotographic deviceInfo
- Publication number
- JPS5833276A JPS5833276A JP13236981A JP13236981A JPS5833276A JP S5833276 A JPS5833276 A JP S5833276A JP 13236981 A JP13236981 A JP 13236981A JP 13236981 A JP13236981 A JP 13236981A JP S5833276 A JPS5833276 A JP S5833276A
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive drum
- discharge wire
- printing paper
- transfer
- transfer electrode
- 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
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
- G03G15/164—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 the second base being a continuous paper band, e.g. a CFF
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、転写式電子写真装置の転写電極機構に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer electrode mechanism for a transfer type electrophotographic apparatus.
従来、この櫨の機構は、使用する印字用紙の幅によらず
有効長が一定の転写を極を有していた。Conventionally, this Hajime mechanism has a transfer pole whose effective length is constant regardless of the width of the printing paper used.
第１図は従来のこの種の機構を示し、図において、（ｉ
）は感光ドラム、（２）は紙搬送トラクタ（６）により
搬送される印字用紙、（４）は感光ドラム（１）のトナ
ーを印字用紙に転写するための放電ワイヤ、（３）はこ
の放電ワイヤ（４）に放電をさせるための転写電極、（
５）は転写電源である。FIG. 1 shows a conventional mechanism of this kind, in which (i
) is the photosensitive drum, (2) is the printing paper transported by the paper transport tractor (6), (4) is the discharge wire for transferring the toner from the photosensitive drum (1) onto the printing paper, and (3) is this discharge Transfer electrode for causing electric discharge to the wire (4), (
5) is a transfer power source.
次に動作について説明する。感光ドラム（１）上の現像
されたトナーは、転写電極（３）の放電ワイヤ（４）か
ら放電される電荷により、印字用紙（２）上に転写され
る。Next, the operation will be explained. The developed toner on the photosensitive drum (1) is transferred onto the printing paper (2) by electric charge discharged from the discharge wire (4) of the transfer electrode (3).
従来の転写電極機構は、その有効長が、印字用紙幅に依
らず一定であるので、放電ワイヤ（４）からのコロナ放
電は、印字用紙（２）のみならず、感光ドラムｆｉｌを
も帯電する。その結果、感光ドラム（１）の特性を著し
く劣化させる。特に、印字用紙（２）の幅を変えた時点
において、前回の印字用紙幅に起因する感光トリムの特
性の不均一が生じ、印字品質の低下を招く欠点がめった
。Since the effective length of the conventional transfer electrode mechanism is constant regardless of the width of the printing paper, the corona discharge from the discharge wire (4) charges not only the printing paper (2) but also the photosensitive drum fil. . As a result, the characteristics of the photosensitive drum (1) are significantly deteriorated. In particular, when the width of the printing paper (2) is changed, the characteristics of the photosensitive trims become non-uniform due to the previous width of the printing paper, which frequently leads to deterioration of printing quality.
この発明は、上記の様な従来のものの欠点を除去する為
になされたもので、転写ｇｔ極の放電ワイヤに、印字用
紙幅によって可動すＪ帯電防止カバーを設けることによ
り、感光ドラムの印字用紙幅に起因する劣化を招かない
様な転写１１１極機構を提供することを目的としている
。This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by providing the discharge wire of the transfer gt pole with a J anti-static cover that moves according to the width of the printing paper, the printing paper of the photosensitive drum It is an object of the present invention to provide a transfer 111-pole mechanism that does not cause deterioration due to width.
以下、この発明の一実施例を図について説明する。第２
図において、第１図と同一符号は同一のものを示し、（
７）は、帝′鑞防止カバーであり、感光ドラム（１）と
放電ワイヤ（４）の間に位置しており、紙搬送トラクタ
（６）と共に、印字用紙幅方向に連動して動く構造にな
っている。An embodiment of the present invention will be described below with reference to the drawings. Second
In the figures, the same symbols as in Figure 1 indicate the same things, and (
Reference numeral 7) is a dust-proofing cover, which is located between the photosensitive drum (1) and the discharge wire (4), and has a structure in which it moves in conjunction with the paper conveyance tractor (6) in the width direction of the printing paper. It has become.
次に動作について説明する。感光ドラム（１）上の現像
されたトナーは、転写電極（３）の放電ワイヤ（４）か
ら放電される電荷により、印字用紙（２）上に転写され
る。この時、印字用紙のないところも放電するが、この
部分は感光ドラム（１）と放電ワイヤ（４）の間に帯電
防止カバー（７）がるるため、放電ワイヤ（４）から発
生するコロナ電荷が感光ドラム（１）を帯電する事を防
止し、感光ドラム（１）の特性の劣化を防止する。Next, the operation will be explained. The developed toner on the photosensitive drum (1) is transferred onto the printing paper (2) by electric charge discharged from the discharge wire (4) of the transfer electrode (3). At this time, the area where there is no printing paper is also discharged, but since the antistatic cover (7) is placed between the photosensitive drum (1) and the discharge wire (4), the corona charge generated from the discharge wire (4) occurs in this area. This prevents the photosensitive drum (1) from being charged, and prevents deterioration of the characteristics of the photosensitive drum (1).
なお、上記実施例では、帯電防止カバー（７）は、紙搬
送トラクター（６）に連動して勧く場合について説明し
たが、これは独立に設置しても、同等な効果を奏する。In the above embodiment, the antistatic cover (7) is installed in conjunction with the paper transport tractor (6), but the same effect can be obtained even if the antistatic cover (7) is installed independently.
以上の様に、この発明によれば、感光ドラムが転写電極
の放電により帯電されるのを防止する機構を設けたので
、印字用紙が無い部分の感光ドラムの劣化を防ぐ事がで
き、印字用紙幅を変えた時にも、安定な印字品質が得ら
れる転写式電子写真機構を示す斜視図、第２図は本発明
の一実施例による転写電極機構を示す斜視図である。As described above, according to the present invention, since a mechanism is provided to prevent the photosensitive drum from being charged due to the discharge of the transfer electrode, it is possible to prevent deterioration of the photosensitive drum in the area where there is no printing paper, and the printing paper FIG. 2 is a perspective view showing a transfer type electrophotographic mechanism that can provide stable printing quality even when the width is changed. FIG. 2 is a perspective view showing a transfer electrode mechanism according to an embodiment of the present invention.
（１）・・・感光ドラム、（２）・・・印字用紙、（３
）・・・転写電極、（４）・・・放電ワイヤ、（６）・
・・紙搬送トラクタ、（７）・・・帯電防止カバー。(1)...Photosensitive drum, (2)...Printing paper, (3
)...Transfer electrode, (4)...Discharge wire, (6)...
...Paper transport tractor, (7)...Antistatic cover.
Claims (1)
れる印字用紙と、上記感光ドラムのトナーを上記印字用
紙に転写するための放電ワイヤを有する転写電極と、上
記感光ドラムと上記放電ワイヤとの間の上記印字用紙の
ない部分に印字用紙幅方向に出し入れ自在に介挿された
帯電防止カバーとを備えたことを特徴とする転写式電子
写真装置における転写電極機構。 （２）上記帯電防止カバーが、上記搬送トラクタと連動
するものであることを特徴とする特許請求の範囲第１項
記載の転写式電子写真装置における転写電極機構。[Scope of Claims] fi+ A photosensitive drum, a printing paper conveyed by a paper conveyance tractor, a transfer electrode having a discharge wire for transferring toner on the photosensitive drum to the printing paper, the photosensitive drum and the discharge A transfer electrode mechanism for a transfer type electrophotographic apparatus, comprising: an antistatic cover that is inserted in a portion between the wire and the printing paper where there is no printing paper so as to be freely inserted and removed in the width direction of the printing paper. (2) A transfer electrode mechanism in a transfer type electrophotographic apparatus according to claim 1, wherein the antistatic cover is interlocked with the transport tractor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13236981A JPS5833276A (en) | 1981-08-21 | 1981-08-21 | Transfer electrode mechanism of transfer system electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13236981A JPS5833276A (en) | 1981-08-21 | 1981-08-21 | Transfer electrode mechanism of transfer system electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5833276A true JPS5833276A (en) | 1983-02-26 |
Family
ID=15079759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13236981A Pending JPS5833276A (en) | 1981-08-21 | 1981-08-21 | Transfer electrode mechanism of transfer system electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5833276A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0475362U (en) * | 1990-11-15 | 1992-07-01 | ||
| JPH04112267U (en) * | 1991-03-20 | 1992-09-30 | 富士通株式会社 | Transfer charger cover structure |
| US5987299A (en) * | 1995-10-09 | 1999-11-16 | Oce Printing Systems Gmbh | Electrographic printer with adjustable corona device |
-
1981
- 1981-08-21 JP JP13236981A patent/JPS5833276A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0475362U (en) * | 1990-11-15 | 1992-07-01 | ||
| JPH04112267U (en) * | 1991-03-20 | 1992-09-30 | 富士通株式会社 | Transfer charger cover structure |
| US5987299A (en) * | 1995-10-09 | 1999-11-16 | Oce Printing Systems Gmbh | Electrographic printer with adjustable corona device |
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