JPS6310428B2 - - Google Patents
Info
- Publication number
- JPS6310428B2 JPS6310428B2 JP54063369A JP6336979A JPS6310428B2 JP S6310428 B2 JPS6310428 B2 JP S6310428B2 JP 54063369 A JP54063369 A JP 54063369A JP 6336979 A JP6336979 A JP 6336979A JP S6310428 B2 JPS6310428 B2 JP S6310428B2
- Authority
- JP
- Japan
- Prior art keywords
- transfer material
- guide member
- image
- transfer
- insulator
- 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 45
- 239000002184 metal Substances 0.000 claims description 17
- 239000012212 insulator Substances 0.000 claims description 16
- 230000005684 electric field Effects 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 108091008695 photoreceptors Proteins 0.000 description 14
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000010186 staining Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Description
【発明の詳細な説明】
本発明は、画像形成装置に係り、詳細には転写
方式の画像形成に際して転写材を汚すことなく良
好な転写画像を得ることを可能とする画像形成装
置に関する。
従来、電子写真感光体等の静電像担持体上に静
電像を形成し、これを現像し、更に、これを転写
材上に転写して利用する転写方式の画像形成装置
が広く実用に供されている。
ところが、この様な画像形成装置に於て、転写
材が汚れ画質を損う場合があつた。
そして、この原因として転写材を像担持体転写
位置へ導くガイドの汚れが大きく影響しているこ
とを見出した。即ち、従来、画像形成装置に於て
転写材の搬送ガイドは、金属が多用されている
が、この搬送ガイドの像担持体表面に接近した先
端部近傍では、像担持体上の潜像電荷に基く電界
の集中が生じ、しかも、現像器に近いその周囲に
は浮遊トナーも多く存在するので、電界で捕獲さ
れた浮遊トナーがそのガイド先端部へ集中付着す
る現象が生じた。そして、この様なガイド付着ト
ナーが転写材の汚れ原因となつたのである。
本発明は、上述の点に鑑み成されたものであつ
て、良好な転写画像を形成する画像形成装置を提
供するものである。
本発明装置は、ドラム状の像担持体上に形成し
た静電像を現像し、その現像像をガイド部材によ
り導かれた転写材に転写して画像を形成する装置
において、像担持体に対抗配設した転写手段と、
転写手段の転写材搬送方向の上流側に設けられ、
転写材の像担持体側を案内するガイド部材であつ
て、金属板と、少なくともその金属板の先端部に
設けられていて、像担持体との間での電界の集中
を阻止する絶縁体とを有する転写材ガイド部材と
を有することを特徴とする。
そして、更なる本発明装置としては、上記構成
装置に於て、前記表面側ガイド部材のシールド作
用をする金属を、装置本体と同電位に保つたこと
を特徴とする。
以下、本発明の詳細を、図面を参照して具体例
により説明する。
第１図は、本発明に基く具体例画像形成装置の
模式図で、要部を示すものである。
図示装置は、公知の電子写真法（例えば、特公
昭42―23910号或は、特公昭43―24748号）に基き
画像形成するもので、ドラム状像担持体として
は、導電層，光導電層，絶縁層を基本構成とする
感光体を用いたものである。（以下、感光体ドラ
ムと称する。）この感光体ドラム１は、支軸１1に
より回転自在に支持され、画像形成に際しては図
示しない駆動手段により矢示時計回り方向に回転
させられる。
感光体ドラム１の周沿には、潜像形成手段、現
像手段、転写手段、転写材搬送ガイド手段、分離
手段、クリーニング手段等が配置される。具体的
には、感光体ドラムの潜像形成手段として、前除
電器２、一次コロナ放電器３、光像露光Ｌと同時
に作用させるべく背面を光学的に開放した二次コ
ロナ放電器４、全面露光源５等が配置される。続
く現像手段として、マグネツトスリーブ６1と、
そのスリーブ表面に供給する現像剤を収容した現
像剤ホツパー６2を有する現像器６が配置される。
続く転写位置へ転写材を搬入する転写材搬送ガイ
ド手段７として、一対のガイド部材７1，７2と一
対のローラ７3，７4等を有する機構が配置され
る。特にガイド部材は、後に詳述する如く浮遊ト
ナーが付着し難い構成としている。転写位置に
は、転写コロナ放電器８が配置される。分離位置
には、分離ローラ９1、押えローラ９2、更に分離
補助部材９3及び除電々極９4等を有する分離手段
９が配置される。１０は、分離後の転写材を不図
示の定着手段へ移送する移送手段である。クリー
ニング位置には、チツプブレード１１1と、除去
現像剤をドラム軸方向に平行して側方に移送する
搬送スクリユーを有するクリーニング装置１１が
配置される。
上述構成により、感光体ドラム１上には繰返し
画像形成が成される。即ち、感光体ドラム１表面
は、前除電器２によりＡとコロナ放電を施され前
歴が消去される。次いで、一次コロナ放電器３に
より所定極性の一様コロナ放電が成され、続く二
次コロナ放電器４により光像露光Ｌと共に上記一
次と逆極性成分を有する直流或はAC或は偏倚AC
等のコロナ放電が成される。然る後、全面露光源
５により均一露光を成し、感光体表面に光像Ｌに
応じた静電潜像を形成する。この静電潜像は、一
成分系現像剤或は二成分系現像剤を供する現像器
６で現像顕画化される。転写材搬送ガイド手段７
で搬送された転写材が、現像々に重ねられ、背面
より転写コロナ放電器８の転写コロナを受けて現
像々の転写を完了する。転写終了後の転写材は、
分離手段９により感光体ドラム１表面より分離さ
れ、移送手段１０により不図示の定着手段へ移送
される。一方、感光体ドラム表面は、転写終了後
に残留する現像剤をクリーニング手段１１により
除去して、次の画像形成に備えられる。
本発明では、上記の様な画像形成装置の転写材
搬送ガイド手段を汚れ難い構成としているので、
転写材を美麗に保てるのである。以下、その転写
材搬送ガイド手段につき更に説明する。
第２図は、具体例転写材搬送ガイド手段の部分
拡大図で、前述第１図と共通する部材は、同一番
号で示している。転写材搬送ガイド手段の一対の
ガイド部材の内、図示上側に位置するガイド部材
７′2は、感光体ドラムと接触する転写材表面と接
する位置で、かつ現像器に近い位置にある。（以
下表面側ガイド部材と称す。）この位置にある表
面側ガイド部材は、現像器から浮遊した現像剤の
影響を受け易く、しかも転写材表面と接触する機
会を有するので汚れが生ずれば、転写材表面に影
響を及ぼし画質の低下を招く恐れがある訳であ
る。ところが以下の如く構成することでその問題
を良好に解決しているのである。即ち、図示の如
く、表面側ガイド部材７′2は、その先端部及び、
転写材と面する側を絶縁体ａとし、一方転写材と
面さない現像器側を金属ｂと構成したものであ
る。
この様にガイド先端部を絶縁体とすることで、
例え静電荷像を担持した感光体ドラム表面部分が
その先端間近を通過しても、静電荷像により形成
される電界がその先端部に集中することがなく、
従つて、例え周囲に浮遊トナーがあつても、その
先端部にトナーを付着する恐れがないのである。
一方、転写材表面と接触する絶縁体面には摩擦
電荷が誘起されるが、この電荷は、反対側の金属
ｂ間に電界を形成することになり、感光体ドラム
迄その電荷の影響を及ぼさない構成である。この
様にガイド部材内で形成された電界は、何ら周囲
の浮遊トナーを吸着することがないのである。
仮に、上記例に示した金属ｂを付けずに絶縁体
のみとした場合には、転写材との摩擦により電荷
が著積すると、この電荷が、感光体ドラムの導電
層との間に電界を形成してしまう。この様に、浮
遊トナーの存在する空内に電界を形成してしまつ
た場合には、浮遊トナーの吸着は避け得ないもの
となる。従つて、絶縁体のみでガイド部材を構成
した場合には、汚れを生じ、その為に転写材に良
好な画像形成は困難となるのである。これに対し
本発明上記具体例の如く金属を設けておく場合に
は、絶縁体に例え誘起電荷が生じても、その外部
に対する影響は小である。即ちガイド部材に設け
た金属は絶縁体上の電荷による電界をシールする
作用をするものである。そして、この金属は、シ
ール作用を有効に発揮する為、接地或は所定のバ
イアスを印加すると良好である。特にガイド部材
の周囲へ電界を漏らさない為に、装置本体、即ち
ケーシング、感光体ドラム等と同電位に保つこと
が有効である。
勿論上記具体例構成に限らず各種の変形が可能
で、第３図は、ガイド部材の先端部のみを絶縁体
とした場合を示す。この様な構成では、転写材と
の接触で摩擦電荷が生じて蓄積する傾向が減少で
きるので更に汚れを確実に防止できるのである。
以上、図示上側に位置する表面側ガイド部材で説
明したが、転写材背面と接する下側位置のガイド
部材（裏面側ガイド部材と称す）の場合にも必要
に応じて同様の構成としうることは勿論である。
以下、本発明の理解を更に良好とする為に実施
例を示す。
実施例 １
先ず、比較の為に、一対のガイド部材を表面
側、裏面側共に絶縁体であるポリカーボネートで
構成した。転写コロナ放電の影響で、転写コロナ
放電器に近い裏面側ガイド部材は＋250Vの電位
上昇が見られた。一方、表面側ガイド部材は、普
通紙（A4版）を20枚通紙しただけで＋1000〜
1500V迄帯電してしまつた。尚、裏面側ガイド部
材はほぼ＋250Vのままであつた。この表面側ガ
イド部材の急激な電位上昇を起した静電荷は、ガ
イド内側に存在し、通紙による摩擦帯電に起因す
る。
この様なガイド部材を用いて約1000枚の連続コ
ピーを実施したところガイド部材の先端部分の汚
れは少ないものであつたが、転写材と接触する絶
縁体面の汚れは決して満足すべきものではなかつ
た。
次に、第２図の如く、表面側ガイド部材の先端
部に絶縁体が出るようにし、先端部を除いた転写
材と接触しない感光体側の面を金属板として、こ
れを接地した。裏面側ガイド部材は、金属板とし
て電気的には周囲から絶縁した。この様なガイド
部材を用いて約5000枚の連続コピーを行つた処先
端部のみならず、転写材と接触する面もトナー付
着がほとんどなく良好な結果を得た。これによ
り、転写材も汚すことなく安定した画像形成が出
来た。
実施例 ２
表面側ガイド部材を第３図示の如く先端部のみ
絶縁体として実施例１と同様に連続コピーを行つ
た。この場合も、実施例１と同様にガイド部材の
汚れが少ない良好な結果を得た。
以上、具体例により詳述した如く、本発明は、
転写材搬送ガイド手段の汚れを防止して良好な画
像形成を可能とした優れたものである。 DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus, and more particularly to an image forming apparatus capable of obtaining a good transferred image without staining a transfer material during image formation using a transfer method. Conventionally, image forming apparatuses using a transfer method have been widely used in practical use, in which an electrostatic image is formed on an electrostatic image carrier such as an electrophotographic photoreceptor, developed, and then transferred onto a transfer material. It is provided. However, in such an image forming apparatus, there have been cases where the transfer material becomes smudged, impairing the image quality. It has been found that this is largely caused by dirt on the guide that guides the transfer material to the image carrier transfer position. That is, conventionally, in image forming apparatuses, metal is often used as a transfer material conveyance guide, but near the tip of this conveyance guide close to the surface of the image carrier, the latent image charge on the image carrier is Since the electric field is concentrated and there is also a large amount of floating toner around the developing device, a phenomenon has occurred in which the floating toner captured by the electric field is concentrated and adhered to the tip of the guide. Such toner adhering to the guide became the cause of staining the transfer material. The present invention has been made in view of the above-mentioned points, and provides an image forming apparatus that forms a good transferred image. The present invention is an apparatus that develops an electrostatic image formed on a drum-shaped image carrier, and transfers the developed image to a transfer material guided by a guide member to form an image. A transcription means provided,
Provided on the upstream side of the transfer material conveyance direction of the transfer means,
A guide member that guides the image carrier side of the transfer material, and includes a metal plate and an insulator provided at least at the tip of the metal plate to prevent concentration of electric field between the metal plate and the image carrier. A transfer material guide member having a transfer material guide member. A further device of the present invention is characterized in that, in the above-described device, the metal that acts as a shield for the front side guide member is kept at the same potential as the device main body. Hereinafter, details of the present invention will be explained by specific examples with reference to the drawings. FIG. 1 is a schematic diagram of a specific example image forming apparatus based on the present invention, showing the main parts. The illustrated apparatus forms an image based on a known electrophotographic method (for example, Japanese Patent Publication No. 42-23910 or Japanese Patent Publication No. 43-24748), and the drum-shaped image carrier includes a conductive layer and a photoconductive layer. , which uses a photoreceptor whose basic structure is an insulating layer. (Hereinafter, referred to as a photoreceptor drum.) This photoreceptor drum 1 is rotatably supported by a support shaft 11 , and is rotated in the clockwise direction of the arrow by a driving means (not shown) during image formation. Along the circumference of the photosensitive drum 1, a latent image forming means, a developing means, a transfer means, a transfer material conveyance guide means, a separating means, a cleaning means, etc. are arranged. Specifically, as a latent image forming means on the photoreceptor drum, a pre-static eliminator 2, a primary corona discharger 3, a secondary corona discharger 4 whose back surface is optically opened so as to operate simultaneously with the photoimage exposure L, and a front surface An exposure source 5 and the like are arranged. As a subsequent developing means, a magnetic sleeve 6 1 ,
A developing device 6 having a developer hopper 62 containing developer to be supplied to the surface of the sleeve is arranged.
A mechanism having a pair of guide members 7 1 , 7 2 , a pair of rollers 7 3 , 7 4 , etc. is arranged as the transfer material conveying guide means 7 for conveying the transfer material to the subsequent transfer position. In particular, the guide member has a structure that prevents floating toner from adhering to it, as will be described in detail later. A transfer corona discharger 8 is arranged at the transfer position. At the separation position, a separation means 9 including a separation roller 9 1 , a press roller 9 2 , a separation auxiliary member 9 3 , a static eliminating electrode 9 4 , and the like is arranged. Reference numeral 10 denotes a transport means for transporting the separated transfer material to a fixing means (not shown). At the cleaning position, a cleaning device 11 having a chip blade 11 1 and a conveying screw for laterally conveying the removed developer in parallel with the drum axis direction is arranged. With the above configuration, images are repeatedly formed on the photoreceptor drum 1. That is, the surface of the photosensitive drum 1 is subjected to corona discharge with A by the pre-static eliminator 2, and its previous history is erased. Next, a uniform corona discharge of a predetermined polarity is generated by the primary corona discharger 3, and a DC or AC or biased AC having a polarity component opposite to the primary one is generated by the secondary corona discharger 4 together with the photoimage exposure L.
A corona discharge is generated. Thereafter, uniform exposure is performed by the entire surface exposure source 5, and an electrostatic latent image corresponding to the light image L is formed on the surface of the photoreceptor. This electrostatic latent image is developed and visualized in a developing device 6 that provides a one-component developer or a two-component developer. Transfer material conveyance guide means 7
The transfer material conveyed by is superimposed on the developed images, and receives the transfer corona from the transfer corona discharger 8 from the back side to complete the transfer of the developed images. Transfer material after transfer is completed.
It is separated from the surface of the photoreceptor drum 1 by the separating means 9, and is transferred to a fixing means (not shown) by the transferring means 10. On the other hand, the cleaning means 11 removes the developer remaining on the surface of the photoreceptor drum after the transfer is completed, and the surface of the photoreceptor drum is prepared for the next image formation. In the present invention, since the transfer material conveyance guide means of the image forming apparatus as described above is configured to be resistant to dirt,
This keeps the transfer material beautiful. The transfer material conveyance guide means will be further explained below. FIG. 2 is a partially enlarged view of a concrete example of the transfer material conveyance guide means, and the same members as in FIG. 1 are designated by the same numbers. Of the pair of guide members of the transfer material conveyance guide means, the guide member 7' 2 located on the upper side in the figure is in contact with the surface of the transfer material that contacts the photosensitive drum and is located near the developing device. (Hereinafter referred to as the front side guide member.) The front side guide member in this position is easily affected by the developer floating from the developing device, and has the opportunity to come into contact with the surface of the transfer material, so if dirt occurs, This may affect the surface of the transfer material and cause a decrease in image quality. However, this problem has been successfully solved by the following configuration. That is, as shown in the figure, the front side guide member 7'2 has its tip and
The side facing the transfer material is made of insulator a, while the side of the developing device that does not face the transfer material is made of metal b. By making the guide tip an insulator in this way,
Even if the surface portion of the photoreceptor drum carrying an electrostatic charge image passes close to its tip, the electric field formed by the electrostatic charge image will not be concentrated at the tip.
Therefore, even if there is floating toner around, there is no risk of toner adhering to the tip. On the other hand, frictional charges are induced on the insulator surface that contacts the transfer material surface, but this charge forms an electric field between metal b on the opposite side, and does not affect the photoreceptor drum. It is the composition. The electric field thus formed within the guide member does not attract any surrounding floating toner. If metal b shown in the above example is not attached and only an insulator is used, if a significant amount of charge accumulates due to friction with the transfer material, this charge will create an electric field between it and the conductive layer of the photoreceptor drum. It forms. In this way, when an electric field is formed in the air where floating toner exists, adsorption of floating toner becomes unavoidable. Therefore, if the guide member is made of only an insulator, stains will occur, making it difficult to form a good image on the transfer material. On the other hand, when a metal is provided as in the above-described specific example of the present invention, even if an induced charge is generated in an insulator, its influence on the outside is small. That is, the metal provided on the guide member functions to seal the electric field caused by charges on the insulator. Since this metal effectively exhibits a sealing effect, it is best to ground it or apply a predetermined bias to it. In particular, in order to prevent the electric field from leaking around the guide member, it is effective to maintain it at the same potential as the main body of the device, that is, the casing, the photosensitive drum, etc. Of course, various modifications are possible without being limited to the above-mentioned specific example configuration, and FIG. 3 shows a case where only the tip end of the guide member is made of an insulator. With such a configuration, the tendency for frictional charges to occur and accumulate due to contact with the transfer material can be reduced, so that stains can be more reliably prevented.
The above description has been made with respect to the front-side guide member located on the upper side of the drawing, but the same structure can be applied to the lower-side guide member (referred to as the back-side guide member) that contacts the back side of the transfer material, if necessary. Of course. Examples are shown below in order to better understand the present invention. Example 1 First, for comparison, a pair of guide members were made of polycarbonate, which is an insulator, on both the front and back sides. Due to the influence of transfer corona discharge, a potential increase of +250V was observed on the back side guide member near the transfer corona discharger. On the other hand, the front side guide member costs +1000 ~ just by passing 20 sheets of plain paper (A4 size).
It was charged up to 1500V. In addition, the backside guide member remained at approximately +250V. The electrostatic charge that caused this rapid potential increase on the front side guide member exists inside the guide and is caused by frictional electrification caused by paper passing. When approximately 1,000 sheets were continuously copied using such a guide member, there was little dirt on the tip of the guide member, but the dirt on the insulator surface that came into contact with the transfer material was by no means satisfactory. . Next, as shown in FIG. 2, an insulator was made to protrude from the tip of the front-side guide member, and the surface of the photoconductor side that did not come into contact with the transfer material, except for the tip, was grounded using a metal plate. The back side guide member was electrically insulated from the surroundings as a metal plate. Approximately 5,000 sheets were continuously copied using such a guide member, and good results were obtained with almost no toner adhesion not only on the tip but also on the surface that came into contact with the transfer material. This enabled stable image formation without staining the transfer material. Example 2 Continuous copying was carried out in the same manner as in Example 1, except that only the leading end of the front side guide member was an insulator as shown in the third figure. In this case as well, as in Example 1, good results were obtained with less dirt on the guide member. As described above in detail with specific examples, the present invention includes:
This is an excellent method that prevents staining of the transfer material conveyance guide means and enables good image formation.
第１図は、本発明に基く具体例装置を説明する
模式図、第２図及び第３図は、各々転写材搬送ガ
イド手段の部分拡大図。
図中、１；感光体ドラム、２；前除電器、３；
一次コロナ放電器、４；二次コロナ放電器、５；
全面露光源、６；現像器、７；転写材搬送ガイド
手段、８；転写コロナ放電器。
FIG. 1 is a schematic diagram illustrating a specific example device according to the present invention, and FIGS. 2 and 3 are partially enlarged views of transfer material conveyance guide means. In the figure, 1; photoreceptor drum; 2; front static eliminator; 3;
Primary corona discharger, 4; Secondary corona discharger, 5;
Full-surface exposure source, 6 ; Developing device, 7 ; Transfer material conveyance guide means, 8; Transfer corona discharger.
Claims (1)
像し、その現像像をガイド部材により導かれた転
写材に転写して画像を形成する装置において、 像担持体に対抗配設した転写手段と、 転写手段の転写材搬送方向の上流側に設けら
れ、転写材の像担持体側を案内するガイド部材で
あつて、金属板と、少なくともその金属板の先端
部に設けられていて、像担持体との間での電界の
集中を阻止する絶縁体とを有する転写材ガイド部
材と、 を有することを特徴とする画像形成装置。 ２ 上記絶縁体は金属板の転写材搬送通路側に渡
つて設けられている特許請求の範囲第１項に記載
の画像形成装置。 ３ 上記絶縁体は金属板の先端部にのみ設けられ
ている特許請求の範囲第１項に記載の画像形成装
置。[Scope of Claims] 1. In an apparatus for forming an image by developing an electrostatic image formed on a drum-shaped image carrier and transferring the developed image to a transfer material guided by a guide member, the image carrier comprises: a transfer means disposed opposite to the transfer means; and a guide member disposed on the upstream side of the transfer means in the transfer material conveying direction to guide the image carrier side of the transfer material, the guide member having a metal plate and at least a tip portion of the metal plate. An image forming apparatus comprising: a transfer material guide member provided with an insulator that prevents concentration of an electric field between the image carrier and the image carrier. 2. The image forming apparatus according to claim 1, wherein the insulator is provided across the transfer material conveyance path side of the metal plate. 3. The image forming apparatus according to claim 1, wherein the insulator is provided only at the tip of the metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6336979A JPS55155373A (en) | 1979-05-23 | 1979-05-23 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6336979A JPS55155373A (en) | 1979-05-23 | 1979-05-23 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55155373A JPS55155373A (en) | 1980-12-03 |
| JPS6310428B2 true JPS6310428B2 (en) | 1988-03-07 |
Family
ID=13227289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6336979A Granted JPS55155373A (en) | 1979-05-23 | 1979-05-23 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55155373A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881549U (en) * | 1981-11-27 | 1983-06-02 | 日立工機株式会社 | Transfer mechanism of electrophotographic printing device |
| JPS6246837A (en) * | 1985-08-27 | 1987-02-28 | Fuji Xerox Co Ltd | Transfer member guide apparatus for copying machine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5285824A (en) * | 1976-01-08 | 1977-07-16 | Ricoh Co Ltd | Electrophotographic copying machine |
-
1979
- 1979-05-23 JP JP6336979A patent/JPS55155373A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5285824A (en) * | 1976-01-08 | 1977-07-16 | Ricoh Co Ltd | Electrophotographic copying machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55155373A (en) | 1980-12-03 |
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