JP2007114392A5

JP2007114392A5 -

Info

Publication number: JP2007114392A5
Application number: JP2005304510A
Authority: JP
Filing date: 2005-10-19
Publication date: 2008-11-27

Claims

A transfer belt having an elastic layer;
A roller around which the transfer belt is wound;
A cleaning blade in contact with the roller across the transfer belt,
When a vertical cross section of the roller is viewed, a first imaginary line passing through the roller center and a contact portion between the transfer belt and the cleaning blade, a second imaginary line perpendicular to the first imaginary line and passing through the contact portion. An angle θ formed by the second imaginary line and a contact surface of the cleaning blade of the cleaning blade when an imaginary line is formed;
An angle α formed by an opposing surface of the cleaning blade of a deformed portion caused by elastic deformation of the elastic layer by the cleaning blade coming into contact with the transfer belt, and the second imaginary line,
α> θ
A transfer apparatus characterized by having the following relationship:

The transfer device according to claim 1, wherein the elastic layer is a rubber material having a thickness of 100 to 600 μm.

The transfer device according to claim 1, wherein the elastic layer is one of polyurethane rubber, silicon rubber, and NBR.

4. The transfer device according to claim 1, wherein the elastic layer has a coating layer of fluororesin or nylon resin having a thickness of 3 to 5 μm.

5. The apparatus according to claim 1, further comprising a bias applying unit that contacts the roller via the transfer belt and applies a bias, and the cleaning blade contacts the transfer belt biased by the bias applying unit. 2. The transfer device according to item 1.

An image carrier;
An exposure unit for forming a latent image on the image carrier;
A developing unit for developing the latent image formed in the exposure unit;
An image developed by the developing unit is transferred, and a transfer belt wound by a roller;
A primary transfer portion for transferring the image of the image carrier onto the transfer belt;
A secondary transfer portion for transferring the image transferred to the transfer belt to a recording medium;
A cleaning blade in contact with the roller across the transfer belt on which the image is transferred to a recording medium at the secondary transfer unit,
When the vertical cross section of the roller is viewed, a first imaginary line passing through the roller center and the contact portion between the transfer belt and the cleaning blade, a second imaginary line perpendicular to the first imaginary line and passing through the contact portion. An angle θ formed by the second imaginary line and the contact surface of the transfer belt of the cleaning blade,
An angle α formed by an opposing surface of the cleaning blade and a second imaginary line of a deformed portion caused by elastic deformation of the elastic layer when the cleaning blade comes into contact with the transfer belt,
α> θ
An image forming apparatus having the following relationship:

The image forming apparatus according to claim 6, further comprising: a bias applying unit that applies a bias by contacting the roller with the transfer belt interposed therebetween, and the cleaning blade contacts the transfer belt biased by the bias applying unit. apparatus.