JPS6348342B2 - - Google Patents
Info
- Publication number
- JPS6348342B2 JPS6348342B2 JP55005000A JP500080A JPS6348342B2 JP S6348342 B2 JPS6348342 B2 JP S6348342B2 JP 55005000 A JP55005000 A JP 55005000A JP 500080 A JP500080 A JP 500080A JP S6348342 B2 JPS6348342 B2 JP S6348342B2
- Authority
- JP
- Japan
- Prior art keywords
- copy paper
- toner
- transfer
- conductive belt
- photoreceptor
- 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.)
- Expired
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 10
- 230000005684 electric field Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 description 9
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper Feeding For Electrophotography (AREA)
Description
【発明の詳細な説明】
本発明は感光体表面に形成した静電潜像にトナ
ーを吸着させ、該トナーを転写電界の印加のもと
にコピー用紙に転写し、次いで該コピー用紙を分
離、搬送するようにした電子写真複写機の転写、
分離、搬送装置の改良に関するもので、その目的
とするところはコピー用紙が導電性分離搬送部材
に誘電分離される際、コピー用紙の先端部に於て
は一度転写チヤージヤーによつてコピー用紙に転
写されたトナー画像が感光体に逆転写して転写抜
けを生じても分離が確実に行われるようにし、一
旦分離后は転写抜けが生じないようにせんとする
にある。DETAILED DESCRIPTION OF THE INVENTION The present invention involves adhering toner to an electrostatic latent image formed on the surface of a photoreceptor, transferring the toner to copy paper under the application of a transfer electric field, and then separating the copy paper. Transfer of an electrophotographic copying machine designed to convey
The purpose of this is to improve the separation and conveyance device, and its purpose is to transfer the leading edge of the copy paper once to the copy paper by the transfer charger when the copy paper is dielectrically separated by the conductive separation and conveyance member. The objective is to ensure separation even if a transferred toner image is reversely transferred onto a photoreceptor and a transfer defect occurs, and to prevent a transfer defect from occurring once the toner image has been separated.
本願発明者は先に、感光体表面に形成した静電
潜像にトナーを吸着させ、該トナー画像を転写電
界の印加のもとにコピー用紙に転写し、次いで該
コピー用紙を導電性ベルトに接近させ、静電誘電
作用により該導電性ベルトにコピー用紙のトナー
画像と同極性の電荷を発生させ、コピー用紙を導
電性ベルトに吸着分離することを発明したが、導
電性ベルトを直接接地していたので、コピー用紙
の電荷が導電性ベルトを介してリークし、コピー
用紙と転写されたトナーとの間の電気力線本数が
減少し、トナー粒子のコピー用紙への束縛力が減
少することにより吸引力の強い感光体表面に逆転
写され、ライン画像のようなトナー付着量の多い
画像部において転写抜けが発生し易くなるという
欠点があつた。 The inventor of the present application first adsorbed toner to an electrostatic latent image formed on the surface of a photoreceptor, transferred the toner image to copy paper by applying a transfer electric field, and then transferred the copy paper to a conductive belt. They brought the conductive belt close to each other and generated a charge of the same polarity as the toner image on the copy paper on the conductive belt by electrostatic dielectric action, and separated the copy paper by adsorption to the conductive belt. As a result, the charge on the copy paper leaks through the conductive belt, reducing the number of electric lines of force between the copy paper and the transferred toner, and reducing the binding force of the toner particles to the copy paper. Therefore, the toner is reversely transferred to the surface of the photoreceptor, which has a strong suction force, and there has been a drawback that transfer omissions tend to occur in image areas such as line images where a large amount of toner adheres.
本発明は前記した導電性分離搬送部材を、抵抗
体を介して接地し、コピー用紙の先端部に於ては
分離作用のみを確実に行い、一旦分離后は転写作
用を確実に行い転写抜けを防止するようにして従
来の欠点を除くようにしたものである。 In the present invention, the conductive separating and conveying member described above is grounded through a resistor, and only the separating action is performed reliably at the leading edge of the copy paper, and once the copy paper is separated, the transferring action is reliably performed to prevent transfer omissions. It is designed to eliminate the drawbacks of the conventional technology.
次に添附図面に示した本発明の一実施例につい
て詳細に説明する。１は感光体ドラムで、表面に
電荷の静電潜像２が形成され、電荷のトナー
３が付着している。４はコピー用紙で転写チヤー
ジヤー５により極に転写電界を印加するように
なつている。６は40μｍ厚さのシート状ニツケル
からなる導電性ベルトで、104〜108Ωcmの抵抗体
７を介して接地している。 Next, one embodiment of the present invention shown in the accompanying drawings will be described in detail. Reference numeral 1 denotes a photoreceptor drum, on the surface of which a charged electrostatic latent image 2 is formed and charged toner 3 attached. Reference numeral 4 denotes copy paper, and a transfer electric field is applied to the pole by a transfer charger 5. Reference numeral 6 denotes a conductive belt made of sheet-like nickel having a thickness of 40 μm, and is grounded via a resistor 7 having a resistance of 10 4 to 10 8 Ωcm.
次に作用について説明する。コピー用紙４に転
写チヤージヤー５により極の転写電界が印加さ
れると、感光体ドラム１上の極性のトナーはコ
ピー用紙４に転写される。次いで該コピー用紙４
が導電性ベルト６に接近すると、コピー用紙４と
導電性ベルト６間の静電容量をC1（ｔ）とし、コ
ピー用紙４と感光体ドラム１間の静電容量をC2
（ｔ）とし、導電性ベルト６と感光体ドラム１間
の静電容量をC3（ｔ）とすると、導電性ベルト６
の電位Ｖ（ｔ）との間の等価回路は第２図の如く
なり、導電性ベルト６の電位Ｖ（ｔ）は、第３図
に示す如くコピー用紙４の先端が導電性ベルト６
に接触した時点では零電位で、コピー用紙４が次
第に導電性ベルト６に接触するにつれて次第に
電位が増大する。各コピー用紙毎にこれを繰返
す。ところで導電性ベルト６の電位が零又は零に
近い状態の時程、分離性能はよいが、前述した理
由により一度コピー用紙４に転写された極性の
トナーが分離の瞬間に感光体ドラム１に逆転写さ
れ易い。しかし乍らこの様な現象はコピー用紙４
が感光体ドラム１から分離される先端部に於ての
み行われるだけで、コピー用紙４の先端が分離さ
れるとそれ以后は導電性ベルト６に第３図に示す
ように次第に極性の電位が誘起されるのでコピ
ー用紙４の先端から或る巾（７〜８mm）以降の画
像部分では転写抜けは生じない。又ピーク電圧は
各コピー用紙の帯電ムラによつて変動し分離性能
は不安定であるが、コピー用紙４の先端が分離さ
れているので導電性ベルト６を下方に位置させる
等レイアウトを工夫すれば円滑に分離を行うこと
ができる。 Next, the effect will be explained. When a polar transfer electric field is applied to the copy paper 4 by the transfer charger 5, the polar toner on the photosensitive drum 1 is transferred to the copy paper 4. Then the copy paper 4
approaches the conductive belt 6, the capacitance between the copy paper 4 and the conductive belt 6 is C 1 (t), and the capacitance between the copy paper 4 and the photosensitive drum 1 is C 2
(t), and the capacitance between the conductive belt 6 and the photoreceptor drum 1 is C 3 (t), then the conductive belt 6
The equivalent circuit between the potential V(t) of the conductive belt 6 and the potential V(t) of the conductive belt 6 is as shown in FIG.
The potential is zero at the time of contact with the conductive belt 6, and as the copy paper 4 gradually comes into contact with the conductive belt 6, the potential gradually increases. Repeat this for each copy sheet. By the way, the separation performance is good when the potential of the conductive belt 6 is zero or close to zero, but for the reason mentioned above, the polarity of toner once transferred to the copy paper 4 is reversed to the photoreceptor drum 1 at the moment of separation. Easy to photograph. However, this phenomenon occurs when copy paper 4
This is done only at the leading edge of the copy paper 4 that is separated from the photoreceptor drum 1. After the leading edge of the copy paper 4 is separated, the electrical potential of the conductive belt 6 gradually increases in polarity as shown in FIG. Since this is induced, no transfer omission occurs in the image portion beyond a certain width (7 to 8 mm) from the leading edge of the copy paper 4. In addition, the peak voltage varies depending on the uneven charging of each copy paper, and the separation performance is unstable. However, since the leading edge of the copy paper 4 is separated, if the layout is devised, such as by positioning the conductive belt 6 downward, Separation can be performed smoothly.
本発明によれば導電性分離搬送部材を抵抗体を
介して接地しているので、分離性能は幾分不安定
であるが分離の際のトナーの転写抜けを確実に防
止できるという特徴を有するものである。 According to the present invention, since the conductive separating and conveying member is grounded through the resistor, the separating performance is somewhat unstable, but it is characterized in that it is possible to reliably prevent toner from being transferred during separation. It is.
第１図は本発明の一実施例正面図、第２図は第
１図の転写、分離に関する等価回路図、第３図は
第２図の導電性分離搬送部材の電圧を示すグラフ
である。
１…感光体ドラム、２…静電潜像、３…トナ
ー、４…コピー用紙、５…転写チヤージヤー、６
…導電性ベルト、７…抵抗体。
FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is an equivalent circuit diagram relating to the transfer and separation of FIG. 1, and FIG. 3 is a graph showing the voltage of the conductive separating and conveying member of FIG. 1... Photosensitive drum, 2... Electrostatic latent image, 3... Toner, 4... Copy paper, 5... Transfer charger, 6
...Conductive belt, 7...Resistor.
Claims (1)
着させ該トナー画像を転写電界の印加のもとにコ
ピー用紙に転写し、次いで該コピー用紙を感光体
から分離し、搬送する装置に於て、転写后のコピ
ー用紙の分離、搬送を行う導電性分離搬送部材を
設け、該導電性分離搬送部材は抵抗体を介して接
地する如くなした電子写真複写機の転写、分離、
搬送装置。1. In a device that attracts toner to an electrostatic latent image formed on the surface of a photoreceptor, transfers the toner image onto copy paper under the application of a transfer electric field, then separates the copy paper from the photoreceptor and conveys it. The electrophotographic copying machine is equipped with a conductive separating and conveying member for separating and conveying the copy paper after transfer, and the conductive separating and conveying member is grounded through a resistor.
Conveyance device.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP500080A JPS56102876A (en) | 1980-01-19 | 1980-01-19 | Transferring, separating and conveying device of electrophotographic copier |
| US06/213,687 US4389112A (en) | 1979-12-10 | 1980-12-05 | Transfer sheet separating/conveying apparatus for use in electrophotographic copying machines |
| GB8039111A GB2065558B (en) | 1979-12-10 | 1980-12-05 | Sheet separating and conveying apparatus for use in electrophotographic copying machines |
| DE3046554A DE3046554C2 (en) | 1979-12-10 | 1980-12-10 | Device for stripping a sheet-shaped recording medium from the photoconductive surface of a rotating drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP500080A JPS56102876A (en) | 1980-01-19 | 1980-01-19 | Transferring, separating and conveying device of electrophotographic copier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56102876A JPS56102876A (en) | 1981-08-17 |
| JPS6348342B2 true JPS6348342B2 (en) | 1988-09-28 |
Family
ID=11599304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP500080A Granted JPS56102876A (en) | 1979-12-10 | 1980-01-19 | Transferring, separating and conveying device of electrophotographic copier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56102876A (en) |
-
1980
- 1980-01-19 JP JP500080A patent/JPS56102876A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56102876A (en) | 1981-08-17 |
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