JPS6253826B2 - - Google Patents
Info
- Publication number
- JPS6253826B2 JPS6253826B2 JP48082914A JP8291473A JPS6253826B2 JP S6253826 B2 JPS6253826 B2 JP S6253826B2 JP 48082914 A JP48082914 A JP 48082914A JP 8291473 A JP8291473 A JP 8291473A JP S6253826 B2 JPS6253826 B2 JP S6253826B2
- Authority
- JP
- Japan
- Prior art keywords
- transfer material
- transfer
- toner image
- corona discharge
- photosensitive drum
- 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
- 239000000463 material Substances 0.000 claims description 54
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000003068 static effect Effects 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/14—Transferring a pattern to a second base
- G03G13/16—Transferring a pattern to a second base of a toner pattern, e.g. a powder pattern
-
- 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
- G03G15/1665—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 by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
- G03G15/167—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 by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
Description
【発明の詳細な説明】
本発明は電子写真法により感光体等のトナー像
保持部材上に形成されたトナー像を転写材へ転写
する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for transferring a toner image formed on a toner image holding member such as a photoreceptor to a transfer material by electrophotography.
従来、電子写真法により形成された静電潜像を
現像して得たトナー像を転写材に転写するには、
トナー像保持部材に転写材を密着させ、転写材の
裏面よりコロナ放電を印加したり、または転写ロ
ーラーを用いて静電力により転写することが一般
に行われていた。 Conventionally, in order to transfer a toner image obtained by developing an electrostatic latent image formed by electrophotography onto a transfer material,
Generally, a transfer material is brought into close contact with a toner image holding member, and a corona discharge is applied from the back side of the transfer material, or a transfer roller is used to transfer the image by electrostatic force.
第１図はこの従来の転写ローラーを用いた転写
装置の説明図で、転写材３はコロナ放電器４で感
光ドラム上のトナー像２と逆極性に帯電される。
転写ローラー５は表面に絶縁層６を有する金属ロ
ーラー７により構成されている。これにより転写
材３は放電器４からの帯電電荷と、この帯電電荷
とは逆極性であつて、このローラー７に誘起した
電荷とによりローラー５上に静電的に支持され、
その後、感光ドラム１上のトナー像が転写され
る。 FIG. 1 is an explanatory diagram of a transfer device using this conventional transfer roller, in which a transfer material 3 is charged by a corona discharger 4 to a polarity opposite to that of the toner image 2 on the photosensitive drum.
The transfer roller 5 is composed of a metal roller 7 having an insulating layer 6 on its surface. As a result, the transfer material 3 is electrostatically supported on the roller 5 by the electric charge from the discharger 4 and the electric charge which has the opposite polarity and is induced on the roller 7.
Thereafter, the toner image on the photosensitive drum 1 is transferred.
しかし、この構成では転写ローラーを複数回転
させ、転写材に順次色トナーを重ねて転写して行
くカラー装置においては、転写材に転写したトナ
ー像が十分に転写材上に保持できないと、一度転
写材に転写したトナー像を再び感光ドラムに戻し
てしまい画質を落すことになる。 However, with this configuration, in a color device that rotates the transfer roller multiple times and transfers color toners onto the transfer material one after another, if the toner image transferred to the transfer material cannot be sufficiently retained on the transfer material, once the toner image is transferred, The toner image transferred to the material is returned to the photosensitive drum, resulting in a drop in image quality.
本発明は上記従来の問題点を解決するもので、
その目的は転写材支持体上の転写材の位置ずれを
防止し、且つ、転写材上のトナー像の保持を確実
に行い、色トナーを順次重ねて転写するときの色
ずれ等の問題を防止するものである。 The present invention solves the above conventional problems,
The purpose is to prevent misalignment of the transfer material on the transfer material support, to ensure that the toner image on the transfer material is retained, and to prevent problems such as color misalignment when color toners are transferred one after another. It is something to do.
上記目的を達成する本発明は、トナー像保持部
材に形成した複数のトナー像を順次重ねて同一の
転写材に転写する転写装置であつて、転写材を支
持する導電性を有する転写材支持体と、上記転写
材支持体に転写材を静電的に保持するために、こ
の転写材支持体に対向して位置し、トナー像保持
部材に形成したトナー像と同極性のコロナ放電を
転写材に印加する静電吸着用のコロナ放電手段
と、上記トナー像保持部材に形成したトナー像を
転写する位置の上流側に位置し、このトナー像と
同極性のコロナ放電を転写に先立ち印加するコロ
ナ放電手段と、上記転写材支持体にトナー像と逆
極性のバイアス電圧を印加する電源とを有する。 The present invention, which achieves the above objects, is a transfer device that sequentially overlays a plurality of toner images formed on a toner image holding member and transfers them to the same transfer material, the present invention comprising a transfer material support having conductivity that supports the transfer material. In order to electrostatically hold the transfer material on the transfer material support, a corona discharge having the same polarity as the toner image formed on the toner image holding member is applied to the transfer material. a corona discharge means for electrostatic adsorption, which applies corona discharge means for electrostatic adsorption, and a corona disposed upstream of the position where the toner image formed on the toner image holding member is transferred, and which applies corona discharge of the same polarity as the toner image prior to transfer. The image forming apparatus includes a discharging means and a power source for applying a bias voltage having a polarity opposite to that of the toner image to the transfer material support.
以下、本発明を具体例に基いて説明する。 Hereinafter, the present invention will be explained based on specific examples.
第２図は本発明の転写装置を適用する電子写真
複写装置の構成説明図である。 FIG. 2 is an explanatory diagram of the configuration of an electrophotographic copying apparatus to which the transfer apparatus of the present invention is applied.
図において、感光ドラム１０は導電性支持層１
ａ、光導電性層１ｂ、絶縁性層１ｃとを有し、矢
印Ａ方向に回転する。感光ドラム１表面はまず一
次帯電器１１によつて均一に帯電され、次いで投
影レンズ１２による画像露光と同時に、この一次
帯電とは逆極性の二次帯電あるいは交流コロナに
よる除電がコロナ放電器１３により成され、次い
で全面露光１４を行うことによつて感光ドラム１
０の表面に静電潜像が形成される。この静電潜像
は次いで乾式或は湿式の現像器１５でトナー現像
される。 In the figure, a photosensitive drum 10 has a conductive support layer 1
a, a photoconductive layer 1b, and an insulating layer 1c, and rotates in the direction of arrow A. The surface of the photosensitive drum 1 is first uniformly charged by a primary charger 11, and then simultaneously with image exposure by a projection lens 12, a corona discharger 13 performs secondary charging with a polarity opposite to this primary charging or neutralization by AC corona. The photosensitive drum 1 is then exposed 14 on the entire surface.
An electrostatic latent image is formed on the surface of 0. This electrostatic latent image is then developed with toner in a dry or wet developing device 15.
そして、現像後は転写用前コロナ放電器１６に
よつて感光ドラム表面に帯電が行なわれ、次いで
転写材送りローラー１７、案内板１８により搬送
された転写材Ｐ上に、転写ローラー１９によつて
感光ドラム表面のトナー像が転写され、転写を済
んだ転写材は定着器２０によつて定着される。一
方、転写を終えた感光ドラム１０はクリーニング
器２１によつて清掃される。 After development, the surface of the photosensitive drum is charged by the pre-transfer corona discharger 16, and then the transfer material P, which is conveyed by the transfer material feed roller 17 and the guide plate 18, is charged by the transfer roller 19. The toner image on the surface of the photosensitive drum is transferred, and the transferred transfer material is fixed by a fixing device 20. On the other hand, the photosensitive drum 10 after the transfer is cleaned by a cleaning device 21.
以下、本発明の転写装置について詳細に説明す
る。 Hereinafter, the transfer device of the present invention will be explained in detail.
感光ドラム１０上には現像器１５により負極性
のトナー像が形成される。一方、送りローラー１
７により転写材Ｐを転写ローラー１９に送り込
む。転写材Ｐは負極性コロナ放電が静電吸着用の
放電器２２により与えられて帯電される。その結
果、転写ローラー１９にはその負極性とは逆極性
の電荷が誘起され、その結果、転写材Ｐはローラ
ー１９に吸着支持される。なお、転写ローラー１
９には固有抵抗値が106Ωcm以下の金属、導電ゴ
ム等の導電体が好ましい。 A negative toner image is formed on the photosensitive drum 10 by a developing device 15 . On the other hand, feed roller 1
7, the transfer material P is sent to the transfer roller 19. The transfer material P is charged by a negative corona discharge applied by a discharger 22 for electrostatic adsorption. As a result, a charge having a polarity opposite to the negative polarity is induced on the transfer roller 19, and as a result, the transfer material P is attracted and supported by the roller 19. In addition, transfer roller 1
9 is preferably a conductor such as metal or conductive rubber having a specific resistance value of 10 6 Ωcm or less.
一方、感光ドラム１０の表面は転写に先立ちコ
ロナ放電器１６によりトナーと同極性の負に帯電
される。これにより既に転写材上に転写したトナ
ー像が再び感光ドラムに戻つてしまい、画質を低
下させることや、感光ドラム上のこれから転写す
るトナー像が、転写材が十分に感光ドラムに密着
する前に、トナー像が転写材に飛び移ることで画
質を低下させることを防止する。 On the other hand, the surface of the photosensitive drum 10 is negatively charged with the same polarity as the toner by a corona discharger 16 prior to transfer. As a result, the toner image that has already been transferred onto the transfer material returns to the photosensitive drum, reducing the image quality, and the toner image that is about to be transferred on the photosensitive drum may be transferred before the transfer material has fully adhered to the photosensitive drum. , to prevent deterioration of image quality due to the toner image being transferred to the transfer material.
第３図はこのときの各部材の電荷状態で、ロー
ラー１９中の鎖線の（＋）は電源Ｅにより転写の
ためのバイアスを印加したときの状態を示し、２
３は分離爪で、２４はローラー１９から転写材を
分離するときの分離用コロナ放電器を示す。 FIG. 3 shows the charge state of each member at this time, and the dashed line (+) in the roller 19 indicates the state when bias for transfer is applied by the power source E,
3 is a separation claw, and 24 is a corona discharger for separating the transfer material from the roller 19.
上記構成が特に色トナーを順次重ねて多色像を
形成する転写装置に好ましい理由について述べる
と、先ず、転写材の全面が転写ローラー１９上に
静電的に吸着されている。このため、多重転写中
に転写材が動いて、転写したトナー画像に画像ず
れを生じることがない。また、転写材をローラー
１９に吸着するためのコロナ放電極性がトナー像
と同極性である点、及び転写の前に予め感光ドラ
ム上のトナー像に印加するコロナ放電がトナー像
と上記吸着用のコロナ放電と同極性であるという
点で、単に転写材を転写ローラーに押し付けて十
分に支持させるのみならず、上記の如く一度転写
した転写材上のトナー像が、次の転写の前に感光
ドラムに飛び移ることが防止できるから、色ずれ
やぼけ等のない良好なカラー画像の形成を可能に
する。 The reason why the above configuration is particularly preferable for a transfer device that forms a multicolor image by sequentially overlapping color toners is as follows. First, the entire surface of the transfer material is electrostatically attracted to the transfer roller 19. Therefore, there is no possibility that the transfer material moves during multiple transfers, causing image shift in the transferred toner images. Further, the polarity of the corona discharge for adsorbing the transfer material to the roller 19 is the same as that of the toner image, and the corona discharge applied in advance to the toner image on the photosensitive drum before transfer is the same as that of the toner image. In that it has the same polarity as corona discharge, it not only allows the transfer material to be sufficiently supported by pressing it against the transfer roller, but also allows the toner image on the transfer material that has been transferred once to be transferred to the photosensitive drum before the next transfer. Since it is possible to prevent color jumps, it is possible to form a good color image without color shift or blurring.
以下、本発明の実施例を説明する。 Examples of the present invention will be described below.
〔実施例 １〕
アルミニウム基板上に光導電性層として、ZnO
層を形成した感光板をドラムに固定して感光ドラ
ムを形成した。この感光ドラム表面は−500Vに
帯電し、像露光して潜像を形成し、正極性に帯電
したトナーで現像した。この感光ドラムは転写の
前にトナー像と同極である正極性の転写用前帯電
を行ない、＋500Vに帯電した。[Example 1] ZnO as a photoconductive layer on an aluminum substrate
The photosensitive plate on which the layers were formed was fixed to a drum to form a photosensitive drum. The surface of this photosensitive drum was charged to -500V, exposed imagewise to form a latent image, and developed with positively charged toner. Before transfer, this photosensitive drum was charged to +500V with a positive polarity that is the same as that of the toner image.
そして、上記感光ドラム上のトナー像は、転写
のために−1000Vのバイアス電圧を印加したアル
ミ製の転写ローラーに静電吸着した転写材に転写
した。なお、この転写材の静電吸着は転写用前帯
電と同極の＋6kVのコロナ放電を転写材に与える
ことで行ない、このときの転写材表面の電位は＋
200Vであつた。 Then, the toner image on the photosensitive drum was transferred to a transfer material that was electrostatically attracted to an aluminum transfer roller to which a bias voltage of -1000 V was applied for transfer. This electrostatic adsorption of the transfer material is performed by applying a +6kV corona discharge of the same polarity as the pre-transfer charge to the transfer material, and the potential on the surface of the transfer material at this time is +
It was 200V.
その結果、転写材の吸着による位置ずれはな
く、更に繰り返された色トナーによる多重転写に
おいて、転写前に転写材と感光ドラムとの間でト
ナーの移動がなく、鮮明で色ずれのないカラー画
像を得た。 As a result, there is no positional shift due to adsorption of the transfer material, and even in repeated multiple transfers using color toner, there is no movement of toner between the transfer material and the photosensitive drum before transfer, resulting in clear color images with no color shift. I got it.
〔実施例 ２〕
CdS層を光導電性層とし、第３図示の構成の感
光ドラム及び画像プロセスにより潜像を形成し
た。この潜像を負（−）極性のトナーで現像し、
このトナー像を転写用前帯電により−1kVに帯電
した。[Example 2] A CdS layer was used as a photoconductive layer, and a latent image was formed using a photosensitive drum having the configuration shown in Figure 3 and an image process. This latent image is developed with toner of negative (-) polarity,
This toner image was charged to -1 kV by pre-transfer charging.
一方、アルマイト処理したアルミローラーを転
写ローラーとし、この転写ローラーに樹脂コート
した上質紙を−5.5kVのコロナ放電を与えて静電
吸着した。このとき上質紙の表面は−500Vに帯
電した。 On the other hand, an alumite-treated aluminum roller was used as a transfer roller, and resin-coated high-quality paper was electrostatically attracted to this transfer roller by applying a -5.5 kV corona discharge. At this time, the surface of the high-quality paper was charged to -500V.
そして、転写時に転写ローラーに転写のために
＋800Vのバイアス電圧を印加した。そして、一
回毎に異なる色トナーを順次転写材に重ねて転写
し、カラー画像を形成したが、上記実施例１と同
様に良好な像形成が可能であつた。 Then, during transfer, a bias voltage of +800V was applied to the transfer roller for transfer. Then, different colored toners were sequentially transferred onto the transfer material each time to form a color image, and as in Example 1 described above, good image formation was possible.
以上の如く本発明の転写装置によれば、転写材
支持体に対する転写材の位置ずれを生じることな
く、同時に既に転写材に転写したトナーが次の転
写前にトナー像保持部材へ再び飛び移つて色ずれ
やぼけを生じることがなく、良好な多重のカラー
画像形成が可能となつた。 As described above, according to the transfer device of the present invention, the toner that has already been transferred to the transfer material is transferred to the toner image holding member again before the next transfer without causing the transfer material to be misaligned with respect to the transfer material support. It has become possible to form good multiple color images without causing color shift or blurring.
第１図は従来の転写装置の説明図、第２図は本
発明を適用する電子写真装置の簡略な断面図、第
３図は本発明の転写装置の模式的な説明図を示
す。
図において、１０は感光ドラム、１６は転写用
前コロナ放電器、１９は導電性の転写ローラー、
２２は吸着用コロナ放電器、Ｐは転写材、Ｅは転
写用バイアス電源を示す。
FIG. 1 is an explanatory diagram of a conventional transfer device, FIG. 2 is a simplified sectional view of an electrophotographic apparatus to which the present invention is applied, and FIG. 3 is a schematic explanatory diagram of the transfer device of the present invention. In the figure, 10 is a photosensitive drum, 16 is a pre-transfer corona discharger, 19 is a conductive transfer roller,
22 is a corona discharger for adsorption, P is a transfer material, and E is a transfer bias power source.
Claims (1)
を同一の転写材に順次重ねて転写する転写装置に
おいて、 転写材を支持する導電性を有する転写材支持体
と、 上記転写材支持体に転写材を静電的に保持する
ために、この転写材支持体に対向して位置し、ト
ナー像保持部材に形成したトナー像と同極性のコ
ロナ放電を転写材に印加する静電吸着用のコロナ
放電手段と、 上記トナー像保持部材に形成したトナー像を転
写する位置の上流側に位置し、このトナー像と同
極性のコロナ放電を転写に先立ちトナー像保持部
材表面に印加するコロナ放電手段と、 上記転写材支持体にトナー像と逆極性のバイア
ス電圧を印加する電源と、 を有することを特徴とする転写装置。[Scope of Claims] 1. A transfer device that sequentially transfers a plurality of toner images formed on a toner image holding member onto the same transfer material in an overlapping manner, comprising: a conductive transfer material support that supports the transfer material; In order to electrostatically hold the transfer material on the transfer material support, a static electricity source is placed opposite the transfer material support and applies a corona discharge of the same polarity as the toner image formed on the toner image holding member to the transfer material. a corona discharge means for electroadsorption; and a corona discharge means located upstream of the position where the toner image formed on the toner image holding member is transferred, and applying a corona discharge having the same polarity as the toner image to the surface of the toner image holding member prior to transfer. A transfer device comprising: a corona discharge means for applying a bias voltage having a polarity opposite to that of the toner image to the transfer material support;
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP48082914A JPS6253826B2 (en) | 1973-07-23 | 1973-07-23 | |
| GB3212874A GB1477930A (en) | 1973-07-23 | 1974-07-19 | Image transfer method and device |
| AU71485/74A AU492866B2 (en) | 1973-07-23 | 1974-07-22 | Image transfer method and device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP48082914A JPS6253826B2 (en) | 1973-07-23 | 1973-07-23 | |
| US05/489,087 US3992557A (en) | 1974-07-17 | 1974-07-17 | Image transfer method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22113486A Division JPS62168180A (en) | 1986-09-18 | 1986-09-18 | Transfer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5032947A JPS5032947A (en) | 1975-03-29 |
| JPS6253826B2 true JPS6253826B2 (en) | 1987-11-12 |
Family
ID=26423942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48082914A Expired JPS6253826B2 (en) | 1973-07-23 | 1973-07-23 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6253826B2 (en) |
| GB (1) | GB1477930A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52422A (en) * | 1975-06-23 | 1977-01-05 | Shigekazu Enoki | Transfer method of magnetic toner |
| JPS6027028B2 (en) * | 1975-07-18 | 1985-06-26 | キヤノン株式会社 | Transfer device |
| JPS6029947B2 (en) * | 1976-12-14 | 1985-07-13 | 株式会社リコー | Transfer method for multicolor electrophotography |
| JPS5657044A (en) * | 1979-10-17 | 1981-05-19 | Ricoh Co Ltd | Transferring and separating method of copying machine |
| JPS5786846A (en) * | 1980-11-20 | 1982-05-31 | Canon Inc | Transfer-material carrying device |
| JPS6152672A (en) * | 1984-08-21 | 1986-03-15 | Konishiroku Photo Ind Co Ltd | Picture transfer device |
| JPS6151180A (en) * | 1984-08-21 | 1986-03-13 | Konishiroku Photo Ind Co Ltd | Image transfer device |
| JPS6152670A (en) * | 1984-08-21 | 1986-03-15 | Konishiroku Photo Ind Co Ltd | Picture transfer device |
| JPS6152674A (en) * | 1984-08-21 | 1986-03-15 | Konishiroku Photo Ind Co Ltd | Picture transfer device |
| JP3306310B2 (en) * | 1996-08-29 | 2002-07-24 | シャープ株式会社 | Image forming device |
-
1973
- 1973-07-23 JP JP48082914A patent/JPS6253826B2/ja not_active Expired
-
1974
- 1974-07-19 GB GB3212874A patent/GB1477930A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1477930A (en) | 1977-06-29 |
| AU7148574A (en) | 1976-01-22 |
| JPS5032947A (en) | 1975-03-29 |
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