JP2008233937A5

JP2008233937A5 -

Info

Publication number: JP2008233937A5
Application number: JP2008170504A
Authority: JP
Filing date: 2008-06-30
Publication date: 2009-07-30

Claims

An image forming apparatus having a cleaning member made of an elastic body that comes into contact with the surface of an image carrier and cleans the surface,
When the rotation direction of the image carrier at the time of image formation is the forward direction, the image carrier in a state where the cleaning member is in contact is rotated in the reverse direction prior to the forward rotation from the stopped state. Driving means;
Control means for controlling the rotation operation of the image carrier in the reverse direction according to information indicating the magnitude of the friction force generated between the image carrier and the cleaning member when the image carrier rotates.
Equipped with a,
The information is
Elapsed time since the last image forming operation
The control means includes
When the image formation start signal is received, if the elapsed time is longer than a predetermined time, the image carrier is rotated in the reverse direction and then rotated in the forward direction. If the elapsed time is less than the predetermined time, the image carrier is reversed. An image forming apparatus that is driven in the forward direction without being driven to rotate in the direction .

The control means includes
The image forming apparatus according to claim 1, wherein the time, distance, or speed during reverse rotation is controlled.

The control means includes
The image forming apparatus according to claim 1 or 2, characterized in that to control the number of repetitions of the operation of rotating in the normal direction after reverse rotation.

The rotation of the image carrier in the forward direction is triggered when the apparatus is turned on, immediately before starting image formation, when returning from a trouble state where image formation cannot be performed, or when the power saving state is released. the image forming apparatus according to any one of claims 1 to 3, characterized.

A pressure varying means for varying the contact pressure of the cleaning member to the carrier;
The control means includes
By controlling the pressure varying means, the contact pressure during the rotation of the image carrier in the reverse direction is lower than that at the time of image formation, and when the forward rotation is started, the contact pressure is reduced at the time of image formation. the image forming apparatus according to any one of claims 1 to 4, characterized in that raised to contact pressure.

Image processing means for exposing the photoreceptor to form a latent image and developing the formed latent image;
It said image bearing member, an image forming apparatus according to any one of claims 1 to 5, wherein the a photosensitive member.

Image processing means for primary transfer of the formed image to the intermediate transfer member and secondary transfer of the image primarily transferred to the intermediate transfer member to the sheet;
Said image bearing member, an image forming apparatus according to any one of claims 1 to 5, characterized in that the an intermediate transfer member.

Image processing means for transferring the formed image onto a transfer material conveyed by a transfer material conveyance body;
Said image bearing member, an image forming apparatus according to any one of claims 1 to 5, characterized in that said a transfer material carrying member.

An image forming method executed by an image forming apparatus having a cleaning member made of an elastic body that comes into contact with and cleans the surface of an image carrier,
When the rotation direction of the image carrier at the time of image formation is the forward direction, the image carrier in a state where the cleaning member is in contact is rotated in the reverse direction prior to the forward rotation from the stopped state. A driving step;
A control step of controlling the reverse rotation of the image carrier according to information indicating the magnitude of the frictional force generated between the image carrier and the cleaning member when the image carrier is rotated;
Perform the steps including,
The information is
Elapsed time since the last image forming operation
The control step includes
When the image formation start signal is received, if the elapsed time is longer than a predetermined time, the image carrier is rotated in the reverse direction and then rotated in the forward direction. If the elapsed time is less than the predetermined time, the image carrier is reversed. An image forming method comprising driving in a forward direction without rotating in a direction .