JP2000267378A5

JP2000267378A5 -

Info

Publication number: JP2000267378A5
Application number: JP1999067354A
Authority: JP
Filing date: 1999-03-12
Publication date: 2005-04-21

Description

そして、イエロー、マゼンタ、シアン、ブラックの各色のトナーを収納した現像器Ｙ、Ｍ、Ｃ、ＢＫを有する回転自在な現像装置１０４を回転させて第１色目（例えばイエロー）の現像器Ｙを感光ドラム１０１と対向する現像位置Ｄに位置させ、感光ドラム１０１上の静電潜像にトナーを付着させてイエローのトナー像として現像する。 Then, the rotatable developing device 104 having the developing devices Y, M, C, and BK containing the toners of each color of yellow, magenta, cyan, and black is rotated to sensitize the developing device Y of the first color (for example, yellow). It is positioned at the development position D facing the drum 101, and toner is adhered to the electrostatic latent image on the photosensitive drum 101 to develop it as a yellow toner image.

このイエローのトナー像は、感光ドラム１０１に当接して矢印方向（時計方向）に回転する中間転写体（中間転写ドラム）１０５上に１次転写ニップ部Ｔ１にて１次転写される。そして、この１次転写工程を他の３色、即ちマゼンタ、シアン、ブラックについても順次行い、中間転写体１０５上に４色のトナー像を重ねる。 This yellow toner image is primarily transferred by the primary transfer nip portion T1 onto the intermediate transfer body (intermediate transfer drum) 105 that abuts on the photosensitive drum 101 and rotates in the arrow direction (clockwise direction). Then, this primary transfer step is sequentially performed for the other three colors, that is, magenta, cyan, and black, and the toner images of the four colors are superimposed on the intermediate transfer body 105.

この評価では、イエローのトナー像先端部で色ずれ量の最大値が１２５μｍであり、色ずれ量の平均は４５μｍであった。また、Ａ３用紙の先端から１００ｍｍ付近でイエローのトナー像の色ずれは安定して良くなっている。 In this evaluation, the maximum value of the amount of color shift at the tip of the yellow toner image was 125 μm, and the average amount of color shift was 45 μm. In addition, the color shift of the yellow toner image is stable and good at around 100 mm from the tip of the A3 paper.

【００１６】
【課題を解決するための手段】
上記目的を達成するために本発明は、画像情報に応じたトナー像を形成可能な像担持体と、前記像担持体からトナー像の転写を受ける中間転写体と、を有する画像形成装置において、前記画像情報に応じたトナー像を前記中間転写体へ転写する前に、前記中間転写体上にトナーを付着させることを特徴としている。 0016.
[Means for solving problems]
In order to achieve the above object, the present invention relates to an image forming apparatus having an image carrier capable of forming a toner image according to image information and an intermediate transfer body that receives transfer of a toner image from the image carrier. Before transferring the toner image corresponding to the image information to the intermediate transfer body, the toner is adhered onto the intermediate transfer body .

また、前記中間転写体へ転写する前に前記中間転写体上に付着させたトナーに重なるように、前記画像情報に応じたトナー像を前記中間転写体へ転写することを特徴としている。 Further, it is characterized in that a toner image corresponding to the image information is transferred to the intermediate transfer body so as to overlap the toner adhered to the intermediate transfer body before being transferred to the intermediate transfer body.

また、前記画像情報に応じたトナー像を前記中間転写体へ転写する前に前記中間転写体上に付着させるトナーは、前記像担持体上に形成されたトナーを転写することにより付着させるものであることを特徴としている。 Further, the toner to be adhered to the intermediate transfer body before transferring the toner image corresponding to the image information to the intermediate transfer body is to be adhered by transferring the toner formed on the image carrier. It is characterized in that.

また、前記像担持体を帯電する帯電手段と、前記帯電手段により帯電された前記像担持体表面を露光して前記画像情報に応じた静電潜像を形成する露光手段と、前記静電潜像に静電的にトナーを付着させてトナー像を形成する現像手段と、を有し、前記画像情報に応じたトナー像を前記中間転写体へ転写する前に前記中間転写体上に付着させるトナーを前記像担持体上に形成する場合においては、前記帯電手段と前記露光手段を作動させずに、前記現像手段を形成させることを特徴としている。 Further, a charging means for charging the image carrier, an exposure means for exposing the surface of the image carrier charged by the charging means to form an electrostatic latent image according to the image information, and the electrostatic latent image. It has a developing means for electrostatically adhering toner to an image to form a toner image, and attaches a toner image corresponding to the image information onto the intermediate transfer body before transferring it to the intermediate transfer body. When the toner is formed on the image carrier, the developing means is formed without operating the charging means and the exposure means .

Claims

1. An image forming apparatus comprising: an image carrier capable of forming a toner image according to image information; and an intermediate transfer member receiving a toner image transferred from the image carrier
An image forming apparatus characterized in that toner is adhered on the intermediate transfer body before transferring a toner image corresponding to the image information to the intermediate transfer body.

The toner image according to the image information is transferred to the intermediate transfer member so as to overlap with the toner deposited on the intermediate transfer member before transfer to the intermediate transfer member. Image forming device.

Before the toner image corresponding to the image information is transferred to the intermediate transfer member, the toner to be attached onto the intermediate transfer member is to be attached by transferring the toner formed on the image carrier. An image forming apparatus according to claim 1 or 2, characterized in that

A charging unit for charging the image carrier, an exposure unit for exposing the surface of the image carrier charged by the charging unit to form an electrostatic latent image according to the image information, and the electrostatic latent image Developing means for electrostatically adhering toner to form a toner image;
When the toner to be attached on the intermediate transfer member is formed on the image carrier before the toner image corresponding to the image information is transferred to the intermediate transfer member, the charging unit and the exposure unit are operated. The image forming apparatus according to claim 3, wherein the developing unit is formed instead.