JPS6152675A - Picture transfer device - Google Patents
Picture transfer deviceInfo
- Publication number
- JPS6152675A JPS6152675A JP59174591A JP17459184A JPS6152675A JP S6152675 A JPS6152675 A JP S6152675A JP 59174591 A JP59174591 A JP 59174591A JP 17459184 A JP17459184 A JP 17459184A JP S6152675 A JPS6152675 A JP S6152675A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- drum
- transfer material
- toner
- image
- 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
- G03G15/1665—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
-
- 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
- G03G15/1695—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 with means for preconditioning the paper base before the transfer
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
- G03G2215/0167—Apparatus for electrophotographic processes for producing multicoloured copies single electrographic recording member
- G03G2215/0174—Apparatus for electrophotographic processes for producing multicoloured copies single electrographic recording member plural rotations of recording member to produce multicoloured copy
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/16—Transferring device, details
- G03G2215/1604—Main transfer electrode
- G03G2215/1619—Transfer drum
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/16—Transferring device, details
- G03G2215/1647—Cleaning of transfer member
- G03G2215/1657—Cleaning of transfer member of transfer drum
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〕
本発明は電子写真法等によって形成されたトナー画像を
紙等の転写材上に転写するための画像転写装置に関し、
より詳しくは同一転写材に複数回の転写を行なってトナ
ー像を重ね合せ多色画像を得るに適した画像転写装置に
関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an image transfer device for transferring a toner image formed by electrophotography or the like onto a transfer material such as paper.
More specifically, the present invention relates to an image transfer device suitable for overlapping toner images by performing multiple transfers onto the same transfer material to obtain a multicolor image.
電子写真法を用いて多色像を得ることを目的として従米
種々の方法及び装置が提案されているが、像担持体−に
に第1の色分解画像を形成せしめて対応する第1のカラ
ートナーで現像した後、紙等の転写材に伝写し、同一の
過程をf52.第3と必要な色分解数に応じて繰返して
同一転写材上に複数のカラートナー像を順次重ねて転写
し、多色像を得るのが最も一般的である。転写材上に色
画像を順次重ねてゆく方式においては、像担持体に討す
る転写材の位置合わせが極めて重要であって、これが不
正確であると色ズレを生じ得られる画像は用に耐えない
ものとなってしまう6
像担持体に対する転写材の位置を正確に規制する手段と
しては、像担持体に接する転写ドラムを設け、該ドラム
上に転写材を固定し像担持体と同期回転せしめ、転写材
が像担持体と常に一定の関係位置を保つようにした転写
装置が多く用いられている。転写ドラム上には機械的な
係止手段(グリッパ)を設は給送ローラ等によって送ら
れて来る転写材の先端部を自動的に係止しドラム上に固
定するのが普通である。Various methods and apparatuses have been proposed in the United States for the purpose of obtaining multicolor images using electrophotography. After developing with toner, transfer to a transfer material such as paper, and repeat the same process at f52. The most common method is to repeatedly transfer a plurality of color toner images onto the same transfer material in a superimposed manner in accordance with the number of required color separations to obtain a multicolor image. In the method of sequentially overlapping color images on a transfer material, alignment of the transfer material to the image carrier is extremely important, and if this is inaccurate, color misregistration may occur, making the image unusable. 6. As a means for accurately regulating the position of the transfer material relative to the image carrier, a transfer drum is provided in contact with the image carrier, the transfer material is fixed on the drum, and the transfer material is rotated synchronously with the image carrier. 2. Description of the Related Art Transfer devices in which a transfer material always maintains a constant relative position with an image carrier are often used. Generally, a mechanical locking means (gripper) is provided on the transfer drum to automatically lock the leading edge of the transfer material fed by a feed roller or the like and fix it on the drum.
像担持体上のトナー像を転写材に転写する際には、トナ
ーを転写材上に移動させるため1に写材に電荷を与える
等の静電的なプロセスが必要とされ、また像担持体も電
荷を有する等、転写材には複雑な節電力が働き、像担持
体或いは転写ドラムからの機械的力と相まって転写材は
ズレ動き易く、機械的に係止するのが最も確実な方式と
して採られているのが現状である。When transferring the toner image on the image carrier to a transfer material, an electrostatic process such as applying an electric charge to the transfer material is required in order to move the toner onto the transfer material. The transfer material has a charge, etc., so complex power saving functions work on the transfer material, and combined with the mechanical force from the image carrier or transfer drum, the transfer material tends to shift, so mechanically locking is the most reliable method. The current situation is that it is adopted.
例えば米国特許3,729,311号には像担持ドラム
に接する転写材保持ドラムを有するカラー複写へか開示
されており、転写材保持ドラムには転写材を固定するグ
リッパが設けられている。また特開昭55−18653
号公報には像担持体ドラムに接する絶縁性表面をもつ網
目スクリーンより成る転写材支持体を有するカラー複写
機が開示されている。For example, US Pat. No. 3,729,311 discloses a color copying system having a transfer material holding drum in contact with an image bearing drum, and the transfer material holding drum is provided with a gripper for fixing the transfer material. Also, JP-A-55-18653
The publication discloses a color copying machine having a transfer material support made of a mesh screen having an insulating surface in contact with an image bearing drum.
ここでは転写材が転写材支持体に静電的に吸着されるた
め、転写材を係止する機械的手段は必ずしも必要ではな
いとされているが、スクリーン状の転写材支持体は転写
材との接触面積が少なく転写材を確実に保持固定する為
にはやはり支持体に係止することが必要である。Here, since the transfer material is electrostatically attracted to the transfer material support, it is said that mechanical means for locking the transfer material is not necessarily necessary, but the screen-shaped transfer material support is In order to securely hold and fix the transfer material since the contact area is small, it is necessary to lock it to the support body.
しかしながら転写ドラム上に係止部を設けた場合、転写
材の自動係止、係止解除、分離のための複雑な環溝を必
要とする、係止位置の待ち合せ等のためコピー動作の速
度、シーケンスが制約を受ける、係止部の汚れ、係止部
に係止される転写材゛先端部に空白を生ずる、転写材保
持ドラムのクリーニング装置にグリッパ部を避ける成端
が必要となる、グリッパのトナー汚れによって転写材が
汚れる1等多くの問題が発生し、より簡単且つ確実な転
写材固定手段の開発が望まれていた6〔発明の目的〕
本発明の目的は複数のトナー像を色ズレを起こすことな
く確実に転写材上に多重転写することができる簡単な構
造の多色静電記録装置用の画像転写装置6を提供するこ
とにある。However, when a locking portion is provided on the transfer drum, a complicated ring groove is required for automatic locking, unlocking, and separation of the transfer material, and the speed of copying operation is reduced due to waiting for the locking position, etc. The sequence is restricted, the locking part becomes dirty, the transfer material locked in the locking part creates a blank at the leading edge, the cleaning device for the transfer material holding drum needs to be terminated to avoid the gripper part, the gripper Many problems have arisen, such as the transfer material being stained by toner stains, and it has been desired to develop a simpler and more reliable means for fixing the transfer material.6 [Object of the Invention] The object of the present invention is to It is an object of the present invention to provide an image transfer device 6 for a multicolor electrostatic recording device, which has a simple structure and can reliably perform multiple transfers onto a transfer material without causing misalignment.
前記の目的は、絶縁性の表面を有し、且つ転写されるべ
きトナーの電荷と逆極性及び同極性のバイアス電圧を切
換え可能に印加される転写ドラムと、註伝写ドラムに対
向して設けられた転写材の表面に前記トナーの電荷と逆
極性の電荷を与える転写材電荷付与手段とを有すること
を特徴とする画像転写装置によって達成された。The above purpose is to provide a transfer drum which has an insulating surface and which is capable of applying a bias voltage of the opposite polarity and the same polarity as the charge of the toner to be transferred, and which is provided opposite to the transfer drum. This has been achieved by an image transfer apparatus characterized by comprising a transfer material charge applying means for applying a charge of opposite polarity to the charge of the toner to the surface of the transferred transfer material.
すなわち画像転写の過程において転写ドラムにトナーと
逆極性及び同極性(転写材が最初に帯電された極性と逆
極性)のバイアス電圧を適時切換えて印加し、トナーの
転写材への移行を促進すると共に転写材を静電引力によ
って転写ドラム面に引き付は固定しようとするもので、
転写ドラム上には転写材を固定するためのグリッパ等の
係止手段は何等必要とせず、従って前述したような種々
の問題が発生することなく色ズレのないトナーの多重転
写を行うことができ、同時にトナーの転写率ら向上する
。That is, in the process of image transfer, bias voltages of the opposite polarity and the same polarity as the toner (opposite polarity to the polarity with which the transfer material was initially charged) are applied to the transfer drum by switching at appropriate times to promote the transfer of toner to the transfer material. At the same time, the transfer material is attracted to and fixed on the transfer drum surface by electrostatic attraction.
There is no need for any locking means such as a gripper to fix the transfer material on the transfer drum, so multiple toner transfers can be performed without color misregistration without causing the various problems described above. At the same time, the toner transfer rate is improved.
本発明において転写ドラムに対向して設けられる転写材
電荷付与手段は転写材の表面に電荷を与え得るものであ
ればよく特に限定されないが、コロナ放電器が特に好ま
しく用いられる。付与する電荷の極性は、転写されるべ
きトナーの電荷(像担持体上の静電像の極性に応じて決
定される)に応じ、トナーの電荷と逆極性となるよう設
定する。In the present invention, the transfer material charge applying means provided opposite to the transfer drum is not particularly limited as long as it can apply a charge to the surface of the transfer material, but a corona discharger is particularly preferably used. The polarity of the applied charge is set to be opposite to the charge of the toner, depending on the charge of the toner to be transferred (determined according to the polarity of the electrostatic image on the image carrier).
転写材電荷付与コロナ放電器への印加電圧は、像担持体
、トナーの性質等によっても異なるが、通 ′常トナー
の電荷と逆極性の5乃至8KVの範囲が適当である。The voltage applied to the corona discharger for imparting charge to the transfer material varies depending on the properties of the image bearing member, toner, etc., but is usually in the range of 5 to 8 KV, which is opposite in polarity to the charge of the toner.
転写ドラムは導電性基体表面に絶縁層を設け、導電性部
にバイアス電圧を印加し1υ・る描込のらのとすればよ
いが、転写ドラムは転写材を像担持体表面に圧着してト
ナーの転写を行う必要上、その表面は適度の弾性を有す
ることが好ましく、このため導電性基体上に導電性弾性
体層を設け、その表面に更に絶縁層を設けた構造をもつ
ものが好ましい。The transfer drum can be used by providing an insulating layer on the surface of a conductive substrate and applying a bias voltage to the conductive part to make a drawing of 1υ. Since it is necessary to perform toner transfer, it is preferable that the surface has a suitable degree of elasticity. Therefore, it is preferable to have a structure in which a conductive elastic layer is provided on a conductive substrate and an insulating layer is further provided on the surface. .
導電性基体としては、例えばアルミニウム等の金属を用
いることが好ましい。導電性弾性体としては導電性ゴム
例えばシリコン系或いはクロロプレン系の導電性ゴム等
が好ましいものとして挙げられる。これらの導電性弾性
体は40”乃至70°のゴム硬度を有し、且つ108Ω
・cm以下の体積抵抗を有するものが好ましく、その導
電性基体上での層厚は1乃至10IIII11程度とす
ることが好ましい。As the conductive substrate, it is preferable to use metal such as aluminum, for example. Preferred examples of the conductive elastic body include conductive rubber such as silicone-based or chloroprene-based conductive rubber. These conductive elastomers have a rubber hardness of 40” to 70° and a resistance of 108Ω.
- It is preferable to have a volume resistivity of cm or less, and the layer thickness on the conductive substrate is preferably about 1 to 10III11.
前記絶縁層は各種の絶縁体例えばポリエステル、ポリカ
ーボネート、ポリ塩化ビニ“−ル、ポリ塩化ビニリデン
、ポリビニルアセテート、メタクリル松(脂、アクリル
樹脂、ポリスチレン、シリコン樹脂、フッ素樹脂、スチ
レン−ブタノエン共重合体、その他各種の重合体或いは
共重合体高分子物、)ム等を用いて構成することができ
る。これら絶縁体は、導電性弾性体表面、或いは直接導
電性基体表面に塗布し、或いは熱収縮性チューブとして
被せ熱収縮させる等の方法により絶縁層を形成させれば
よい。絶縁層の厚みは10乃至100 usとすること
が好ましい。絶縁層の厚みがこれより小さいと作製が難
しく又機械的強度ら低くなって大川上困難を生じ、また
厚みが過大となると転写材の保持及びトナー転写効率等
の点で好ましくない。転写ドラムには前記の通りトナー
の電荷と同極性及び逆極性のバイアス電圧を適時切換え
て印加する。The insulating layer is made of various insulators such as polyester, polycarbonate, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, methacrylic resin, acrylic resin, polystyrene, silicone resin, fluororesin, styrene-butanoene copolymer, It can be constructed using various other polymers or copolymers, etc. These insulators can be applied to the surface of the conductive elastic body or directly to the surface of the conductive substrate, or they can be coated with heat-shrinkable tubes. The insulating layer may be formed by a method such as heat shrinking the insulating layer.The thickness of the insulating layer is preferably 10 to 100 us.If the thickness of the insulating layer is smaller than this, it will be difficult to manufacture and the mechanical strength will deteriorate. If the thickness becomes too low, it will cause major difficulties in production, and if it becomes too thick, it will be unfavorable in terms of retention of the transfer material and toner transfer efficiency.As mentioned above, the transfer drum should be supplied with a bias voltage of the same polarity and opposite polarity as the charge of the toner. Switch and apply at appropriate times.
印加電圧及びその極性の像担持体或いはトナーの性質等
によっても異なるがトナーの電荷と同極性のバイアスは
100乃至800V、逆極性のバイアスは200乃至8
00vとすることが好ましい(電圧はいずれも接地電位
に対するもの)。Although the applied voltage and its polarity vary depending on the properties of the image carrier or toner, a bias with the same polarity as the toner charge is 100 to 800 V, and a bias with the opposite polarity is 200 to 8 V.
00v (all voltages are relative to ground potential).
以下本発明の画像転写装置の機能につし・て説明する。The functions of the image transfer device of the present invention will be explained below.
第1図は本発明の画像転写装置の概略図であって、Lは
導電性基体1と光導電性感光層2より成る像担持体ドラ
ム、3は導電性基体3、導電性弾性体層4、絶縁層5よ
り成る転写ドラムである。図はセレン系或いは無定形シ
リコンのような 1正電荷のび電像を形成する感光層
を用−・た場合を示している。FIG. 1 is a schematic diagram of an image transfer apparatus of the present invention, in which L is an image bearing drum consisting of a conductive substrate 1 and a photoconductive photosensitive layer 2, 3 is a conductive substrate 3, and a conductive elastic layer 4. , a transfer drum consisting of an insulating layer 5. The figure shows a case in which a photosensitive layer, such as selenium-based or amorphous silicon, which is formed by a single positive charge and forms an electric image is used.
転写ドラムLにはスイッチ回路SHによって切換えられ
るバイアス電源6及び6′よりそれぞれ負又は正のバイ
アス電圧が印加される6
像担持体ドラムLと転写ドラムLは転写部へにおいて圧
接され、作動時においてはそれぞれ矢印B、C方向に同
一の周速度で回転する(第1図では転写時の状態を模式
的に表したため両ドラムの間は開いて画かれている)。A negative or positive bias voltage is applied to the transfer drum L from bias power supplies 6 and 6', respectively, which are switched by a switch circuit SH. rotate at the same circumferential speed in the directions of arrows B and C, respectively (in FIG. 1, the space between the two drums is shown as being open to schematically represent the state during transfer).
装置の作動開始時、転写ドラムには負のバイアス電荷を
印加する6像担持体ドラムL上に形成された静電像は負
に帯電したトナーを装填した図に画かれていない現像器
で現像されトナー像を形成する。9はトナー像を形成し
ているトナーである。When the device starts operating, a negative bias charge is applied to the transfer drum.6 The electrostatic image formed on the image carrier drum L is developed by a developing device (not shown in the figure) loaded with negatively charged toner. to form a toner image. 9 is a toner forming a toner image.
図に画かれていない給送手段によって矢印りの方向に進
行する転写材10(その長さは転写材保持ドラムとの円
周より短い)は、転写材電荷付与コ、ロナ放電器7によ
ってその表面にトナーと逆極性の正の電荷を与えられ像
担持体ドラムLと転写材保持ドラム支の接している転写
部に進入する。負に荷電したトナー粒子9は軒耳材表面
の正電荷に引かれて転写材10側に移行しfjSiのト
ナー像の転写が完了する。両ドラムの圧接部から出る際
、転写材10の先頭部には双方のドラムからの静電、引
力が掛かるが、正に帯電した転写材10は負のバイアス
電圧を印加された転写ドラムLにより強(引付けられそ
の表面に固定される(第2図−(1))。The transfer material 10 (its length is shorter than the circumference of the transfer material holding drum) is moved in the direction of the arrow by a feeding means not shown in the figure. The surface of the toner is charged with a positive charge having a polarity opposite to that of the toner, and the toner enters the transfer section where the image bearing drum L and the transfer material holding drum support are in contact with each other. The negatively charged toner particles 9 are attracted by the positive charge on the surface of the eave material and move toward the transfer material 10, completing the transfer of the fjSi toner image. When the transfer material 10 comes out from the pressure contact portion of both drums, the leading edge of the transfer material 10 is subjected to electrostatic and attractive forces from both drums, but the positively charged transfer material 10 is moved by the transfer drum L to which a negative bias voltage is applied. Strong (attracted and fixed to the surface (Fig. 2-(1)).
転写材10の先頭部が転写ドラムLに付いて数mff1
乃至10数l進行した時点(!@2図−〔2〕の状態)
転写ドラl、のバイアスを正に切換える。転写ドラム支
に印加されたバイアス電圧が負の場合、転写材10を転
写ドラムとに引き付けるには極めて効果的であるが、ト
ナー9が負に荷電しているため、)ナーの依写材10へ
の移行、付着が弱められる。従ってこの際バイアスを正
に切換えることによりトナーは転写材り側に強く引き寄
せられ、トナー転写率、転写画質を向上せしめることが
できる。バイアス極性の切換により圧接部での転写材1
0の転写ドラムLに対する吸引力は逆に弱まるが、−に
写材10の転写ドラムL上での保持には転写材10の先
頭部が像担持体ドラムLと転写ドラムLの圧接される転
写部Aに進入、離脱する際の転写ドラム3への吸着が最
も重要であって転写材10の先頭部10mm前後か確実
に保持されてA部を通過すればそれ以後の部分の圧接部
の転写ドラムへの吸引力が弱まっても連続的に転写ドラ
ムに吸着でき転写材ドラム−し上で転写材10がズした
り外れたりすることは全く起こらず、そのまま転写ドラ
ムLに巻付き安定に保持される(第2図〔3〕)。第1
図の転写が終り転写ドラムとが1回転して第2のトナー
像の転写のため転写材10の先頭が転写部に進入する際
にはバイアス電圧を再び負に切換え圧着部での11g写
材の転写ドラムへの吸着を強め転写材のズレを防止しく
第2図 〔4〕)、転写材10の先頭部が転写部Aを通
過すればまたバイアスの極性を正に戻し転写を行う(第
2図〔5〕)。必要に応じてf52図〔4〕〜〔5〕の
プロセスを繰返し完了後は分離爪11等の転写材分離手
段を働かして転写材10を転写ドラム3より剥離しく第
2図〔6〕)、図に画かれていない定着部に送り多色画
像を得る7
尚、単色の画像を得る場合には装置を最初より第2図〔
6〕のモードに置けば図中点線で示した経路で進入し、
転写の終った転写材10は直ちに剥離し定着部に送るこ
とができめため高速且つ連続°的なコピーが可能である
。これは転写ドラム上に転写材係止部がなく、1匠写ド
ラムを任意の位置で使用しうる本発明の画像転写装置に
おり・でのみ得られる利点であって係上部を有する装置
にあっては単色の場合においてら転写ドラムの位置合せ
、係止、係止解除等の動作が必要となり高速化は困難で
ある。The leading edge of the transfer material 10 is attached to the transfer drum L by several mff1
The point at which the progress has been made by more than 10 l (!@Figure 2 - [2] state)
Switch the bias of the transfer driver l to positive. When the bias voltage applied to the transfer drum support is negative, it is extremely effective in attracting the transfer material 10 to the transfer drum, but since the toner 9 is negatively charged, the toner transfer material 10 migration, the adhesion is weakened. Therefore, at this time, by switching the bias to positive, the toner is strongly attracted to the transfer material side, and the toner transfer rate and transferred image quality can be improved. Transfer material 1 at the pressure contact area by switching the bias polarity
On the contrary, the suction force on the transfer drum L of 0 is weakened, but in order to hold the photo material 10 on the transfer drum L, the leading edge of the transfer material 10 is pressed against the image carrier drum L and the transfer drum L. Adsorption to the transfer drum 3 when entering and leaving section A is the most important, and if the top 10 mm of the transfer material 10 is securely held and passes through section A, the subsequent pressure contact portions will not be transferred. Even if the suction force to the drum weakens, it can be continuously attracted to the transfer drum, and the transfer material 10 will not slip or come off on the transfer material drum, and will be wrapped around the transfer drum L and held stably. (Figure 2 [3]). 1st
When the transfer shown in the figure is completed and the transfer drum rotates once and the leading edge of the transfer material 10 enters the transfer section to transfer the second toner image, the bias voltage is switched to negative again and the 11g photo material at the pressure bonding section is transferred. In order to strengthen the adsorption of the transfer material 10 to the transfer drum and prevent the transfer material from shifting (Fig. 2 [4]), when the leading edge of the transfer material 10 passes through the transfer section A, the polarity of the bias is returned to positive again and transfer is performed (Fig. 2 [4]). Figure 2 [5]). If necessary, repeat the processes in Fig. 52 [4] to [5], and after completion, activate the transfer material separation means such as the separation claw 11 to separate the transfer material 10 from the transfer drum 3 (Fig. 2 [6]), A multicolor image is obtained by feeding the device to a fixing section not shown in the figure.
If you set it to mode 6], it will enter the route shown by the dotted line in the figure,
The transfer material 10 that has been transferred can be immediately peeled off and sent to the fixing section, making it possible to perform high-speed and continuous copying. This is an advantage that can only be obtained with the image transfer apparatus of the present invention, which does not have a transfer material locking part on the transfer drum and can be used in any position, and is not available in devices with a locking part. In the case of a single color, operations such as positioning, locking, and unlocking of the transfer drum are required, making it difficult to increase the speed.
また後述のように、本発明の画像転写装置はその構造上
、同−転写材の両面に画像を形成せしめるいわゆる両面
複写成に適して(・るとり・う利点を有する。Furthermore, as will be described later, the image transfer apparatus of the present invention has the advantage that, due to its structure, it is suitable for so-called double-sided copying in which images are formed on both sides of the same transfer material.
以上の説明はすべてセレン系、或(・は正帯電用無定形
シリコンのような正電荷靜電像を形成する感光層を用い
た場合につν・て行ったが、酸化亜8!Y、硫化カドミ
ウム、各種有機感光体、負イ:?電用無定形シリコンの
ような負帯電型の感光層を用(・た1g合にも上記の静
電荷の極性がすべて逆となるのみで上辺機能、効果は同
一である。また感光体(よドラム状のもののみならずベ
ルト状等種々の形態のものも使用することができる。All of the above explanations were made using a photosensitive layer that forms a positively charged static image, such as selenium-based or amorphous silicon for positive charging. When using cadmium, various organic photoreceptors, and a negatively charged photosensitive layer such as amorphous silicon for negative charges, the polarity of the electrostatic charges described above are all reversed, and the upper side functions, The effect is the same.Furthermore, photoreceptors (not only those in the form of a drum but also those in various forms such as a belt can also be used).
前記プロセス中におけるバイアス電圧の切替えは0電記
録装置本体の制御シーケンスにより、或いは像担持体ド
ラム、転写ドラムの回転用の読出し等からの信号等によ
り、電気的、或いは機械的にスイッチ回路5II4を適
時作動させて行えばよい。The switching of the bias voltage during the process is performed by electrically or mechanically switching the switch circuit 5II4 by a control sequence of the main body of the zero-voltage recording apparatus, or by a signal from a readout for rotation of the image bearing drum or transfer drum. All you have to do is activate it at the appropriate time.
尚本発明の画像転写装置には前記転写材分離手段の外、
必要に応じて転写材除電器、転写材保持ドラム除電器、
転写材保持ドラムクリーナー、位置合わせ用センサー等
の付帯装置を付加することができる。In addition to the transfer material separation means, the image transfer device of the present invention includes:
Transfer material static eliminator, transfer material holding drum static eliminator,
Additional devices such as a transfer material holding drum cleaner and positioning sensor can be added.
本発明の画像転写装置は3色分解法を用いた各種の公知
カラー画像形成手段、或いは例えば特公昭48−347
70号公報、特開昭56−5561号公報に開示されて
いるような黒色像の消去過程を含む公知の2色画像形成
手段等各種の多色像形成手段と組合わせて1史川するこ
とができる。また本装置に紙等の転写材を提供する給紙
手段、本装置によって転写された画像を定着する定着手
段等はいづれち公知の各種給紙、定着手段を用いること
ができる。The image transfer device of the present invention can be applied to various known color image forming means using a three-color separation method, or for example, to the Japanese Patent Publication No. 48-347
70 and Japanese Patent Application Laid-open No. 56-5561, in combination with various multicolor image forming means such as known two-color image forming means including a black image erasing process as disclosed in Japanese Patent Laid-Open No. 56-5561. I can do it. Further, various known paper feeding and fixing means can be used as a paper feeding means for supplying a transfer material such as paper to this apparatus, a fixing means for fixing an image transferred by this apparatus, and the like.
次に第3図によって転写が良好におこなえ、且つ転写紙
が十分転写ドラムに保持される条件を説明する。Next, conditions under which the transfer can be performed well and the transfer paper is sufficiently held on the transfer drum will be explained with reference to FIG.
第3図は第1図の転写部の圧着部(第1図Aの部分)の
要部断面の略図であって、感光体りの感光層2の比誘電
率を6m、厚さをdm、空隙23の幅をda、転写紙の
厚さをdp、比誘電率をεp、電荷をσp、空隙33の
幅をclb%伝写ドラム1p絶縁層5の比誘電率をεd
、厚さをda、/バイアス電圧をVB+ (転写紙先端
部のみ)及び+VB2としたとき、転写電界ET (ベ
クトル方向は図示)はで表され、ET の値が負のとき
、負に帯電したトナーの転写が可能である。FIG. 3 is a schematic cross-sectional view of a main part of the pressure bonding part (part A in FIG. 1) of the transfer part in FIG. The width of the gap 23 is da, the thickness of the transfer paper is dp, the relative permittivity is εp, the electric charge is σp, the width of the gap 33 is clb%, the relative permittivity of the transfer drum 1p and the insulating layer 5 is εd
, the thickness is da, and the bias voltage is VB+ (only at the leading edge of the transfer paper) and +VB2, the transfer electric field ET (vector direction is shown) is expressed as, and when the value of ET is negative, it is negatively charged. Toner transfer is possible.
また転写紙を感光体側に引(電界E1はで表わされる。Further, the transfer paper is pulled toward the photoreceptor (the electric field E1 is expressed as .
この値が負のとき転写紙は感光体側に引かれ、その力F
1は
となる。When this value is negative, the transfer paper is pulled toward the photoreceptor, and the force F
1 becomes.
一方、転写紙を転写ドラム側に引く電界E2はで表わさ
れる。この値が正のとき転写紙は感光体側に引かれ、そ
の力F2は
となる。On the other hand, the electric field E2 that pulls the transfer paper toward the transfer drum is expressed by . When this value is positive, the transfer paper is pulled toward the photoreceptor, and the force F2 becomes.
良好な転写が行なわれるためにはIET+ が100
KV/C11以上テアルコトカ必要テア’) 、350
KV/ciI1以上であることが好ましい。IET+ is 100 for good transfer.
KV/C11 or higher (necessary tear'), 350
It is preferable that KV/ciI1 or more.
また転写紙が転写ドラムに巻付くためには、少なくとも
転写紙の先頭部すなわちバイアス電圧がVB+のどさ
+ F t + < + F
2 + ・・・ ・・・ ・・・ (1)の関係が
成立つことが必要である。In addition, in order for the transfer paper to wrap around the transfer drum, at least the leading part of the transfer paper, that is, the bias voltage, must be VB + Throat + F t + < + F
2 + ... ... ... It is necessary that the relationship (1) holds true.
上記(1)式にFl、F2を代入することにより、各パ
ラメータの条件が求められ、パラメータの一部を決める
ことにより好ましい他のパラメータを得ることができる
。By substituting Fl and F2 into the above equation (1), the conditions for each parameter can be determined, and by determining some of the parameters, other desirable parameters can be obtained.
後述の通り、実際に良好な転写が行なわれた装置では上
記の必要条件が満足されることが確かめられrこ。As will be described later, it has been confirmed that the above-mentioned requirements are satisfied in an apparatus that actually performs good transfer.
以下本発明による画像転写装置を3色分解法によるカラ
ー複写機に用いた実施例を示す。An example in which the image transfer device according to the present invention is used in a color copying machine using a three-color separation method will be described below.
第4図は本発明による画像転写装置を用−・たカラー複
写機の画像形成部、画像転写部の概要図である。尚本図
においても第1図のものと同一機能の部材については同
一の番号で表示しである。図中矢印しは図に画かれてい
ない光学系から送られる原画を走査した画像露光の光路
である。走査は3回繰返されその都度フィルタFR(赤
色)、FG(緑色)、FB(青色)を交互に光路りに挿
入して色分解露光を行う。図は青色フィルタFB が
光路に入れられている状態を示している。現像は2成分
現像剤によって行った。FIG. 4 is a schematic diagram of an image forming section and an image transfer section of a color copying machine using an image transfer device according to the present invention. In this figure as well, members having the same functions as those in FIG. 1 are indicated by the same numbers. The arrow mark in the figure indicates the optical path of image exposure that scans the original image sent from an optical system not shown in the figure. The scanning is repeated three times, and each time filters FR (red), FG (green), and FB (blue) are alternately inserted into the optical path to perform color separation exposure. The figure shows a state in which a blue filter FB is placed in the optical path. Development was performed using a two-component developer.
Lはf51図の像担持体ドラムと同様に構成された感光
体ドラムであって、比誘電率εm=6、膜厚dm=60
J4’lの5e−Te感光体が用いられている。ドラム
は矢印の方向に回転し、コロナ放電器20によって全面
に正電荷を与えられた後光路りからの光によって画像露
光される。先ず青色フィルタを光路に入れて露光を行い
、感光ドラムL上に節電像を形成した後負帯電性の黄色
現像剤を装填した現像器21Yで現像し黄色トナー像を
形成する。黄色トナー像を担持した感光ドラムは転写前
除電ランプ22によって除電され転写位置Aに進む。L is a photosensitive drum configured similarly to the image bearing drum in figure f51, and has a relative dielectric constant εm=6 and a film thickness dm=60.
A J4'l 5e-Te photoreceptor is used. The drum rotates in the direction of the arrow, and after its entire surface is positively charged by the corona discharger 20, it is exposed to image by light from the optical path. First, a blue filter is placed in the optical path for exposure, and a power-saving image is formed on the photosensitive drum L. After that, the image is developed by a developing device 21Y loaded with a negatively charged yellow developer to form a yellow toner image. The photosensitive drum carrying the yellow toner image is neutralized by the pre-transfer static eliminating lamp 22 and advances to the transfer position A.
一方給紙ロー223を経て給送される転写紙10はコロ
ナ放電器7によつてその表面にi x to−’ C/
m2の正電荷を与えられ転写位置Aに送られ、感光ドラ
ムL及び転写ドラム1間で挟圧されて黄色トナー像の転
写が開始される。この間転写ドラムエはバイアス電源6
により一500vの負のバイアスVB+を与えられ転写
材10を強(引き付けているが、転写紙の先端部110
0II1程度がA点を通過した後、バイアスはS−の作
動により電源6′よりの+500Vの正バイアス+VB
2に切換えられ黄色トナー像の転写が続行される。On the other hand, the transfer paper 10 fed through the paper feed row 223 is coated with i x to-' C/ on its surface by the corona discharger 7.
It is given a positive charge of m2 and sent to the transfer position A, and is pinched between the photosensitive drum L and the transfer drum 1 to start transferring the yellow toner image. During this time, the transfer drum is powered by bias power 6.
A negative bias VB+ of -500V is applied to the transfer material 10 (attracting it strongly), but the leading edge 110 of the transfer paper
After about 0II1 passes through point A, the bias is changed to +500V positive bias +VB from power supply 6' by the operation of S-.
2, and the transfer of the yellow toner image continues.
転写ドラムLは第1図のものと同一の構造をもつが図で
は細部が省略されている。転写ドラムLの直径は150
III11であって、導電性弾性体層は厚さ2IIIf
flの硬度50°、体積抵抗105Ωc’mの導電性ゴ
ムで構成し、絶縁層は厚さdd= 25JjI、比誘電
率εd=3のポリエステルで構成した。The transfer drum L has the same structure as that shown in FIG. 1, but the details are omitted in the figure. The diameter of the transfer drum L is 150
III11, and the conductive elastic layer has a thickness of 2IIIf.
It was made of conductive rubber with a fl hardness of 50° and a volume resistance of 105 Ωc'm, and the insulating layer was made of polyester with a thickness dd=25 JjI and a dielectric constant εd=3.
また使用した転写紙の比誘電率εp=2、厚みdp=
100Jj1であり、感光体と転写紙の間隔da、転写
ドラムと転写紙の間隔dbはいずれも1pであった。Also, the dielectric constant εp of the transfer paper used was 2, and the thickness dp was
The distance da between the photoreceptor and the transfer paper and the distance db between the transfer drum and the transfer paper were both 1 p.
転写後の感光ドラムはクリーニング装置24によって表
面に残留したトナーを除かれ、除電う°ンプ25で残留
電荷を除かれた後再使用される。After the photosensitive drum has been transferred, the toner remaining on the surface of the drum is removed by a cleaning device 24, and the residual charge is removed by a static eliminator 25 before being reused.
転写ドラムLに保持された転写紙10はドラムLの回転
に伴って進行するがその位置はセンサー26によって読
み取られ、その位置に同期して第、2回目の露光動作が
開始される。第2回目の露光は緑色フィルタFG を
用い、現像は負帯電性のマゼンタ現像剤を装填した現像
器21Mによって行なわれる。得られたマゼンタトナー
像は、転写ドラム上に保持されてA点に進入して来る転
写紙10上の黄色像に重複して転写される。転写ドラム
Lに印加されるバイアス電圧は転写紙10がA点に達す
る前に負に切換えられ転写紙10転写ドラムLに強く引
きつけるため、転写紙10が2つのドラムの圧接部に進
入する際の圧力によってg I/’fJ1 (ことはな
くマゼンタトナー像の正確な位置への転写が得られる。The transfer paper 10 held by the transfer drum L advances as the drum L rotates, and its position is read by the sensor 26, and the second exposure operation is started in synchronization with this position. The second exposure uses a green filter FG, and development is performed by a developing device 21M loaded with a negatively charged magenta developer. The obtained magenta toner image is transferred overlappingly onto the yellow image on the transfer paper 10 held on the transfer drum and entering point A. The bias voltage applied to the transfer drum L is switched to negative before the transfer paper 10 reaches point A, and the transfer paper 10 is strongly attracted to the transfer drum L. The pressure g I/'fJ1 (immediately transfers the magenta toner image to the correct position.
転写紙の先端部10mm程度がA点を通過後は再びバイ
アスの極性を正に戻す、先に転写された黄色トナーは、
転写材の正電荷の外、転写ドラムLに印加された正のバ
イアスによっても強く転写材側に吸引されているためマ
ゼンタトナー像を重複して転写する際にも黄色像が乱れ
たり感光ドラムL側に再転写したりすることはない。After about 10 mm of the leading edge of the transfer paper passes point A, the polarity of the bias is returned to positive again.The yellow toner that was transferred earlier is
In addition to the positive charge on the transfer material, the positive bias applied to the transfer drum L also causes strong attraction to the transfer material, so even when magenta toner images are transferred overlappingly, the yellow image may become distorted or the photosensitive drum L It will not be retransferred to the side.
更に同様の過程を経て赤色フィルタFRを介した露光と
シアン現像剤を装填した現像器21Cによる現像によっ
て得られたシアントナー像を重複転写する。シアントナ
ー像の転写が終った転写紙10は伝写材除電コaす放電
器27より交流コロナ放電を与えて除電され、分離爪1
1を転写ドラムL側に下げてドラム1面より分離し、図
に画かれていない熱ローラ定着器に送られトナー像が定
着される。Furthermore, through a similar process, a cyan toner image obtained by exposure through the red filter FR and development by the developing device 21C loaded with cyan developer is transferred overlappingly. The transfer paper 10 on which the cyan toner image has been transferred is neutralized by applying AC corona discharge from the transfer material static eliminator 27, and the separation claw 1
1 is lowered to the transfer drum L side and separated from the surface of the drum 1, and sent to a heat roller fixing device (not shown), where the toner image is fixed.
転写紙lO上に転写された3色のトナーは定着とともに
溶融混色し減色法によるカラー像が再現される。The three color toners transferred onto the transfer paper 10 are fixed and melted and mixed to reproduce a color image using a subtractive color method.
転写紙の分離された転写ドラムLは転写ドラム除電器2
8によって除電され、更に転写ドラムクリーナ29によ
って表面に付着したトナーを除かれて、次の複写動作サ
イクルに備える。The transfer drum L from which the transfer paper has been separated is transferred to a transfer drum static eliminator 2.
8, the transfer drum cleaner 29 removes toner adhering to the surface of the drum, and prepares for the next copying operation cycle.
本装置によって単色の複写を行う時は現像器1基のみを
働かせ、分離爪11を下げた位置に置き除電器27を連
続的に作1i1Jさせることにより連続且つ高速でコピ
ーを得ることができる。When making monochrome copies using this apparatus, only one developing device is operated, the separating claw 11 is placed in a lowered position, and the static eliminator 27 is operated continuously, so that copies can be obtained continuously and at high speed.
本実施例の各パラメータをまとめると下記の通りである
。The parameters of this example are summarized as follows.
感光体:Se/Te εm=6、d+5=601jl
datdb : 177”
紙 : εp=2 、dp= 1007j1σp :
I XlO”C/n+2
−VB+ : −500V 、 +VB2 : +5
00V 。Photoreceptor: Se/Te εm=6, d+5=601jl
datdb: 177” Paper: εp=2, dp=1007j1σp:
IXlO"C/n+2 -VB+: -500V, +VB2: +5
00V.
絶縁層:ポリエステルt d= 3 、da= 25m
こhらのパラメータを用いて計算したET−L+、F2
、Fl、F2の値は下記の通りとなり、前記の転写ドラ
ムによる転写材保持のための必要条件が満たされている
ことが確認された。Insulating layer: polyester t d=3, da=25m
ET-L+, F2 calculated using these parameters
, Fl, and F2 were as shown below, and it was confirmed that the above-mentioned requirements for holding the transfer material by the transfer drum were satisfied.
VB+のとF VrhのときET=−2,2
X 10@V/m 1.7X 10’V/mE
、= 2,2X 10’V/m −1,7X 1
0’V/mE 2 = 4.5X IO’V/m
感光体側へF 、 = 2.IX 10 N/m21
.3X 1o2N/n2F 2= 1.8X 1G2N
/m2 感光体側へ第5図は第4図のカラー複写機
に両面複写8!能を付加した例であって、現像器、その
他省略された部分は第4図と同一である。When VB+ and F Vrh, ET=-2,2
X 10@V/m 1.7X 10'V/mE
, = 2,2X 10'V/m -1,7X 1
0'V/mE2 = 4.5X IO'V/m
F toward the photoreceptor side = 2. IX 10 N/m21
.. 3X 1o2N/n2F 2= 1.8X 1G2N
/m2 To the photoreceptor side Figure 5 is a double-sided copy 8! on the color copying machine of Figure 4! This is an example with additional functions, and the developing device and other omitted parts are the same as in FIG.
転写材10は0′s4図の場合と同様に供給され、コロ
ナ放電器7によって正の電荷を与えられ、負のバイアス
電圧を印加された転写ドラムに保持され、tjIJ2図
の複写はの場合と同一の過程によって黄、マゼンタ、シ
アンのトナー像を転写される。シアン像の転写が終った
転写材10はa線で示さhた経路により転写材除電用:
yaす放電器27により除電され分離爪11により転写
ドラムLより剥離されて定着器31に送られ、その上面
にカラー画像が完成されて排紙皿32に一旦排出される
。排出された転写材はtjS2の給送ローラ33によっ
てその後尾より複写機内に引きこまれ、すでに画像の形
成されているr:tS1面を転写ドラムLに接するよう
に給送される。転写ドラムLに達した転写材はニアr:
Iす放電器34によりそのfjS2面に正電荷を与えら
れ、負のバイアス電圧を印加されている転写ドラムに吸
着、固定されてドラムとの回転と共に進行する。以下f
PSi面の場合と同様にして黄、マゼンタ、シアンの各
トナー像を順次転写された後、ドラム面より剥離され定
着器31を経て両面にカラー像を有する複写物として排
出皿32上に排出される。The transfer material 10 is supplied in the same manner as in the case of Fig. 0's4, is given a positive charge by the corona discharger 7, and is held on a transfer drum to which a negative bias voltage is applied. Yellow, magenta, and cyan toner images are transferred by the same process. After the cyan image has been transferred, the transfer material 10 is moved along the path indicated by line a to remove static electricity from the transfer material 10:
The discharger 27 removes the static electricity, and the separation claw 11 separates the paper from the transfer drum L and sends it to the fixing device 31, where a color image is completed on the upper surface and is once discharged onto the paper discharge tray 32. The ejected transfer material is drawn into the copying machine from the rear by the feed roller 33 of tjS2, and is fed so that the r:tS1 surface on which an image has already been formed is in contact with the transfer drum L. The transfer material reaching the transfer drum L is near r:
A positive charge is applied to the fjS2 surface by the I-discharger 34, and the transfer drum is attracted and fixed to the transfer drum to which a negative bias voltage is applied, and advances as it rotates with the drum. Below f
After yellow, magenta, and cyan toner images are sequentially transferred in the same manner as on the PSi surface, the toner image is peeled off from the drum surface, passes through the fixing device 31, and is ejected onto the ejection tray 32 as a copy having color images on both sides. Ru.
尚上記実施例は通常の3色分解フィルタを用い黄、マゼ
ンタ、シアンのトナーを用いたカラーコピーの場合につ
いて説明したが、色分解フィルタ及びトナーの色、数、
現像器の数等はこれに限定されるものでないことは勿論
である。In the above embodiment, the case of color copying using yellow, magenta, and cyan toners using a normal three-color separation filter was explained.
Of course, the number of developing devices is not limited to this.
転写ドラムに転写材係止手段を必要としない本発明の画
像転写装置においては、係止手段がないため献写材保持
ドラムを任意の位置で使用できる、転写ドラムと像担持
体を常時圧接しておく事が可能となり、係止手段が像担
蒋体に当たることを避けるための圧接解除或いは位置合
わせ等のは構が不要である、転写ドラムのクリーニング
が容易である等、多くの利、αが得られ、且つ転写ドラ
ムに印加するバイアス電圧の極性を適時に切換えること
によりトナーの転写率が高く色Xしのない高品質0多色
画($! /) 4*b+ 4情造0簡易な多色静電記
録装置を得ることができる。In the image transfer apparatus of the present invention, which does not require a transfer material locking means on the transfer drum, since there is no locking means, the dedication material holding drum can be used at any position, and the transfer drum and image carrier are constantly pressed against each other. It has many advantages, such as eliminating the need for pressure releasing or positioning mechanisms to avoid the locking means hitting the image carrier, and the transfer drum being easy to clean. By switching the polarity of the bias voltage applied to the transfer drum in a timely manner, you can achieve a high toner transfer rate and a high quality multi-color image without color x-rays ($! /) 4*b+ 4 emotion 0 simple A multicolor electrostatic recording device can be obtained.
fjS1図及びft52図はは本発明による画像転写装
置の作動を示す概要図、第3図は転写部圧接部分の略図
、第4図は本発明の画像転写装置を用いたカラー複写機
、第5図は第4図のカラー複写機に両面複写機能を付加
したものの概要図である。
L・・・像担持ドラム L・・・転写ドラム3・・・
導電性基体 4・・・導電性弾性体層5・・・絶縁
層
7・・・転写材電荷付与コロナ放電器
代理人 弁理士 野 1)義 親
第4図fjS1 and ft52 are schematic diagrams showing the operation of the image transfer device according to the present invention, FIG. 3 is a schematic diagram of the pressure contact portion of the transfer section, FIG. The figure is a schematic diagram of the color copying machine shown in FIG. 4 with a double-sided copying function added. L... Image bearing drum L... Transfer drum 3...
Conductive substrate 4... Conductive elastic layer 5... Insulating layer 7... Transfer material charge imparting corona discharge device Agent Patent attorney No 1) Parent-in-law Figure 4
Claims (2)
を転写材上に転写する画像転写装置において、絶縁性の
表面を有し、且つ前記トナーと逆極性及び同極性のバイ
アス電圧を切換え可能に印加される転写ドラムと、該転
写ドラムに対向して設けられた、前記転写材の表面に前
記トナーの電荷と逆極性の電荷を与える転写材電荷付与
手段とを有することを特徴とする画像転写装置。(1) In an image transfer device that transfers a charged toner image formed on an image carrier onto a transfer material, the device has an insulating surface and switches between bias voltages having opposite polarity and the same polarity as the toner. and a transfer material charge applying means provided opposite to the transfer drum to apply a charge of opposite polarity to the charge of the toner to the surface of the transfer material. Image transfer device.
ラム基体と、該基体上に設けられた導電性弾性体層と、
該導電性弾性体層表面に設けられた絶縁層を有すること
を特徴とする特許請求の範囲第1項記載の画像転写装置
。(2) The transfer drum having an insulating surface includes a conductive drum base, a conductive elastic layer provided on the base,
The image transfer device according to claim 1, further comprising an insulating layer provided on the surface of the conductive elastic layer.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59174591A JPS6152675A (en) | 1984-08-21 | 1984-08-21 | Picture transfer device |
US06/766,770 US4674860A (en) | 1984-08-21 | 1985-08-16 | Image transfer device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59174591A JPS6152675A (en) | 1984-08-21 | 1984-08-21 | Picture transfer device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6152675A true JPS6152675A (en) | 1986-03-15 |
Family
ID=15981240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59174591A Pending JPS6152675A (en) | 1984-08-21 | 1984-08-21 | Picture transfer device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6152675A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04134382A (en) * | 1990-09-26 | 1992-05-08 | Canon Inc | Image forming device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS559505A (en) * | 1978-07-05 | 1980-01-23 | Ricoh Co Ltd | Transfer and separating device of electrophotographic copier |
JPS55166671A (en) * | 1979-06-14 | 1980-12-25 | Ricoh Co Ltd | Image recorder |
JPS5772166A (en) * | 1980-10-24 | 1982-05-06 | Konishiroku Photo Ind Co Ltd | Transferring method for toner image |
JPS59174581A (en) * | 1983-03-22 | 1984-10-03 | 石川島播磨重工業株式会社 | Method of bonding aluminum to alumina |
-
1984
- 1984-08-21 JP JP59174591A patent/JPS6152675A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS559505A (en) * | 1978-07-05 | 1980-01-23 | Ricoh Co Ltd | Transfer and separating device of electrophotographic copier |
JPS55166671A (en) * | 1979-06-14 | 1980-12-25 | Ricoh Co Ltd | Image recorder |
JPS5772166A (en) * | 1980-10-24 | 1982-05-06 | Konishiroku Photo Ind Co Ltd | Transferring method for toner image |
JPS59174581A (en) * | 1983-03-22 | 1984-10-03 | 石川島播磨重工業株式会社 | Method of bonding aluminum to alumina |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04134382A (en) * | 1990-09-26 | 1992-05-08 | Canon Inc | Image forming device |
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