JPS6348343B2 - - Google Patents
Info
- Publication number
- JPS6348343B2 JPS6348343B2 JP55005001A JP500180A JPS6348343B2 JP S6348343 B2 JPS6348343 B2 JP S6348343B2 JP 55005001 A JP55005001 A JP 55005001A JP 500180 A JP500180 A JP 500180A JP S6348343 B2 JPS6348343 B2 JP S6348343B2
- Authority
- JP
- Japan
- Prior art keywords
- copy paper
- toner
- transfer
- separation
- conductive belt
- 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
- 238000000926 separation method Methods 0.000 claims description 15
- 230000005684 electric field Effects 0.000 claims description 5
- 230000032258 transport Effects 0.000 claims 1
- 108091008695 photoreceptors Proteins 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 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し、特に
コピー用紙の帯電ムラと無関係に転写性能を一定
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. Even if the transferred toner image is reversely transferred to the photoreceptor and transfer failure occurs, separation is performed reliably.
Once separated, the purpose is to prevent transfer failure from occurring, and in particular to maintain constant transfer performance regardless of uneven charging of the copy paper.
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
画像と同極性の電位を発生させ、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 potential of the same polarity as the toner image on the copy paper on the conductive belt through 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、定電
圧素子を介して接地し、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 via a constant voltage element, and only the separating action is performed reliably at the leading edge of the copy paper, and once the copy paper is separated, the transfer action is performed reliably to prevent transfer failure. This method eliminates the drawbacks of the conventional method.
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、定電圧素子７を介して接
地してある。 Next, one embodiment of the present invention shown in the accompanying drawings will be described in detail. 1 is a photoreceptor drum on which a charged electrostatic latent image 2 is formed, and a charged toner 3 is formed on the surface of the photoreceptor drum.
is 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 constant voltage element 7.
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上の極のトナーはコピ
ー用紙４に転写される。次いでコピー用紙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、最初のコピー用紙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、該コピー用紙４
が次第に導電性ベルト６に接触するにつれて次第
に電位が増大し、定電圧素子７により一定電
位V1となる。次いで分離が終るとそれより低い
一定電位V2となる。２枚目以降のコピー用紙
４が導電性ベルト６に接触時誘起する電圧は一定
電位V2となり、ピーク電圧は一定電位V1と
なり、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図に示すような一定極性電位V1が与え
られるので、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。導電性ベルト６に誘電されるピーク電圧は各
コピー用紙に帯電ムラがあつても定電圧素子７に
より一定の電位V1を発生するので転写性能は
一定で安定する。しかし乍ら２枚目以降の分離性
能は悪くなるが、導電性ベルト６を下方に位置さ
せコピー用紙４が感光体ドラム１から分離され易
い状態にレイアウトすれば、分離作用も円滑に行
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. Next, when the copy paper 4 approaches the conductive belt 6, the capacitance between the copy paper 4 and the conductive belt 6 is set as C 1 (t), and the capacitance between the copy paper 4 and the photoreceptor drum 1 is set as C 2 (t)
Assuming that the capacitance between the conductive belt 6 and the photosensitive drum 1 is C 3 (t), the equivalent circuit between the conductive belt 6 and the potential V(t) is as shown in FIG.
As shown in FIG. 3, the potential V(t) of the conductive belt 6 is zero potential when the leading edge of the first copy paper 4 contacts the conductive belt 6.
As it gradually comes into contact with the conductive belt 6, the potential increases gradually, and becomes a constant potential V1 by the constant voltage element 7. Then, when the separation is completed, a lower constant potential V 2 is reached. The voltage induced when the second and subsequent sheets of copy paper 4 come into contact with the conductive belt 6 becomes a constant potential V2 , the peak voltage becomes a constant potential V1 , and this is repeated. By the way, the separation performance is better when the potential of the conductive belt 6 is zero or close to zero, but for the reason mentioned above, the polar toner once transferred to the copy paper 4 is reversely transferred to the photoreceptor drum 1 at the moment of separation. easy to be However, this phenomenon occurs only at the leading edge of the copy paper 4 where it is separated from the photoreceptor drum 1; after the leading edge of the copy paper 4 is separated, the conductive belt 6
Since a constant polarity potential V 1 as shown in FIG.
Transfer defects do not occur in the image area after 8 mm). Since the peak voltage induced in the conductive belt 6 is a constant potential V1 generated by the constant voltage element 7 even if each copy sheet is unevenly charged, the transfer performance is constant and stable. However, the separation performance for the second and subsequent sheets deteriorates, but if the conductive belt 6 is positioned below and the copy paper 4 is laid out in such a way that it can be easily separated from the photoreceptor drum 1, the separation action can be performed smoothly. can.
本発明によれば導電性分離搬送部材を、定電圧
素子を介して接地しているので、２枚目以降の分
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、特にコピー用紙に
帯電ムラがあつても転写性能を一定にできるとい
う特徴を有するものである。 According to the present invention, since the conductive separation and conveyance member is grounded via a constant voltage element, the separation performance after the second sheet is somewhat unstable, but it is ensured that toner does not transfer during separation. In particular, even if there is uneven charging on copy paper, the transfer performance can be kept constant.
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…定電圧素子。
FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is an equivalent circuit diagram regarding 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. 2. 1... Photosensitive drum, 2... Electrostatic latent image, 3... Toner, 4... Copy paper, 5... Transfer charger, 6
...Conductive belt, 7... Constant voltage element.
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定電圧素子を介
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. Toner is attracted to the electrostatic latent image formed on the surface of the photoconductor, the toner image is transferred to copy paper under the application of a transfer electric field, and then the copy paper is separated from the photoconductor and transferred to a device that transports the toner. An electrophotographic copying machine is provided with a conductive separation and conveyance member for separating and conveying the copy paper after transfer, and the conductive separation and conveyance member is grounded through a constant voltage element.
Separation and conveyance equipment.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP500180A JPS56102877A (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 |
|---|---|---|---|
| JP500180A JPS56102877A (en) | 1980-01-19 | 1980-01-19 | Transferring, separating and conveying device of electrophotographic copier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56102877A JPS56102877A (en) | 1981-08-17 |
| JPS6348343B2 true JPS6348343B2 (en) | 1988-09-28 |
Family
ID=11599331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP500180A Granted JPS56102877A (en) | 1979-12-10 | 1980-01-19 | Transferring, separating and conveying device of electrophotographic copier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56102877A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60159865A (en) * | 1984-01-31 | 1985-08-21 | Matsushita Electric Ind Co Ltd | Preventing device of image blurring |
-
1980
- 1980-01-19 JP JP500180A patent/JPS56102877A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56102877A (en) | 1981-08-17 |
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