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AssigneeKonica Minolta Business Technologies, Inc.
InventorsYusuke Nishisaka, Hideo Yamaki, Shigetaka Kurosu, Hiroshi Morimoto, Satoshi Nishida
Estimating the term…
An image forming apparatus including a transfer section for transferring a toner image formed on an image bearing member onto a sheet by pressure contact of the sheet against the image bearing member with a transfer member; a cleaning section having a cleaning blade to remove residual toner on the image bearing member; and a control section for controlling a rotation of the image bearing member so as to carry out a return action of a blade configuration which stops or reverses the rotation of the image bearing member, when the rotation amount reaches a predetermined value, wherein the control section additionally carries out the return action when the rotation amount reaches a value smaller than the predetermined value, in a case where a size of a sheet in a current job is larger than a size a sheet having been passed through in a previous job.
An image forming apparatus comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Using a blade; Details of cleaning blades, e.g. blade shape, layer forming: details relating to the blade support
Using at least one intermediate support: with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent
Primary transfer to an intermediate transfer belt: the linear arrangement being vertical
Electrography
About 5 years 8 months of term left · ends 18 Jun 2032 (estimated)
This application is based on Japanese Patent Application No. 2010-263288 filed on Nov. 26, 2010 in Japan Patent Office, the entire content of which is hereby incorporated by reference.
The present invention relates to an image forming apparatus comprising a cleaning device which cleans the surface of an image bearing member by bringing a blade into close contact with the surface.
In general, in a cleaning device used for an image forming apparatus, the major method has been that toner on an image bearing member is removed by continuously bringing a blade made of a material such as urethane rubber into close contact with the image bearing member. In this method, it has been known that foreign matter such as paper powder is caught at the pointed end of a blade whereby the lip of the blade or cleaning failure is caused. As a countermeasure against the problem, there is disclosed in Patent Documents 1 to 3 as shown below a method in which, to remove foreign matter from the pointed end of a blade, an image forming job being run is interrupted to stop the movement of an image bearing member or to rotate it in the reverse direction.
FIG. 1 is a sectional view showing a structure of image forming apparatus A relating to the present invention.
FIG. 2 is an expanded sectional view showing a structure of photoreceptor cleaning section 5Y, 5M, 5C, and 5K which are disposed around photoreceptors 1Y, 1M, 1C, and 1K of each color.
FIG. 3 is an expanded sectional view showing a structure of intermediate transfer cleaning section 8 as the cleaning means relating to the present invention.
Hereinafter embodiments of the present invention will be described. The technical scope of the claims or meanings of the terms are not limited by the descriptions in this section.
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FIG. 1 is a sectional view showing a structure of image forming apparatus A relating to the present invention.