IMAGE FORMING APPARATUS, IMAGE FORMING METHOD AND PROCESS CARTRIDGE INVOLVING THE USE OF A CLEANING BLADE THAT REMOVES TONER REMAINING ON A SURFACE OF AN IMAGE BEARING MEMBER
First Claim
1. An image forming apparatus comprising:
- an image bearing member configured to bear a latent electrostatic image;
a latent electrostatic image forming device configured to form the latent electrostatic image on the image bearing member;
a developing device configured to develop and visualize the latent electrostatic image on the image bearing member with a toner;
a transfer device configured to transfer the visualized toner image to a recording medium; and
a cleaning device comprising;
a cleaning blade configured to contact a surface of the image bearing member to remove the toner remaining thereon,wherein a static friction coefficient μ
of the image bearing member ranges from 0.1 to 0.3, a contact pressure of the cleaning blade to the image bearing member ranges from 1.5 to 10 g/cm, and the image bearing member and the cleaning blade satisfy the following relationships (1) and (2);
0.01 (kg)≦
(Toff−
T0)/r≦
0.15 (kg)
Relationship (1)
1.2≦
(Ton−
T0)/(Toff−
T0)≦
3.8,
Relationship (2)wherein T0 represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is not in contact with the surface of the image bearing member, Toff represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is not used for development on the surface of the image bearing member, Ton represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is used for development on the surface of the image bearing member, and r represents a radius of the image bearing member, andan uppermost layer of the image bearing member comprises fluorine resin particulates and the following relationship is satisfied;
0.15 (μ
m)≦
D≦
3 (μ
m),wherein D represents an average diameter of projection images of the fluorine resin particulates surfacing on the uppermost layer, and a total area of the projection images of the fluorine resin particulates is not less than 10% based on a total surface area of the uppermost layer.
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Accused Products
Abstract
An image forming apparatus including an image bearing member having a static friction coefficient of from 0.1 to 0.3, a latent electrostatic image forming device, a developing device, and a cleaning device including a cleaning blade to remove remaining toner, in which the contact pressure of the cleaning blade to the image bearing member ranges from 1.5 to 10 g/cm, and the image bearing member and the cleaning blade satisfy the following relationships (1) and (2):
0.01 (kg)≦(Toff−T0)/r≦_l 0.15 (kg) Relationship (1)
1.2≦(Ton−T0)/(Toff−T0)≦3.8, Relationship (2)
wherein T0 (kgcm) represents the rotation torque of the image bearing member when the cleaning blade is not in contact therewith, Toff, the rotation torque when the cleaning blade contacts the image bearing member and the toner is not thereon, Ton, the rotation torque when the cleaning blade contacts the image bearing member and the toner is thereon for development, and r represents the radius of the image bearing member.
3 Citations
19 Claims
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1. An image forming apparatus comprising:
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an image bearing member configured to bear a latent electrostatic image; a latent electrostatic image forming device configured to form the latent electrostatic image on the image bearing member; a developing device configured to develop and visualize the latent electrostatic image on the image bearing member with a toner; a transfer device configured to transfer the visualized toner image to a recording medium; and a cleaning device comprising; a cleaning blade configured to contact a surface of the image bearing member to remove the toner remaining thereon, wherein a static friction coefficient μ
of the image bearing member ranges from 0.1 to 0.3, a contact pressure of the cleaning blade to the image bearing member ranges from 1.5 to 10 g/cm, and the image bearing member and the cleaning blade satisfy the following relationships (1) and (2);
0.01 (kg)≦
(Toff−
T0)/r≦
0.15 (kg)
Relationship (1)
1.2≦
(Ton−
T0)/(Toff−
T0)≦
3.8,
Relationship (2)wherein T0 represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is not in contact with the surface of the image bearing member, Toff represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is not used for development on the surface of the image bearing member, Ton represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is used for development on the surface of the image bearing member, and r represents a radius of the image bearing member, and an uppermost layer of the image bearing member comprises fluorine resin particulates and the following relationship is satisfied;
0.15 (μ
m)≦
D≦
3 (μ
m),wherein D represents an average diameter of projection images of the fluorine resin particulates surfacing on the uppermost layer, and a total area of the projection images of the fluorine resin particulates is not less than 10% based on a total surface area of the uppermost layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An image forming method comprising:
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forming a latent electrostatic image on an image bearing member; developing the latent electrostatic image with a toner to form a visualized image; transferring the visualized image to a recording medium; and removing the toner remaining on a surface of the image bearing member by contacting a cleaning blade therewith, wherein a static friction coefficient μ
of the image bearing member ranges from 0.1 to 0.3, a contact pressure of the cleaning blade to the image bearing member ranges from 1.5 to 10 g/cm, and the image bearing member and the cleaning blade satisfy the following relationships (1) and (2);
0.01 (kg)≦
(Toff−
T0)/r≦
0.15 (kg)
Relationship (1)
1.2≦
(Ton−
T0)/(Toff−
T0)≦
3.8,
Relationship (2)wherein T0 represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is not in contact with the surface of the image bearing member, Toff represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is not used for development on the surface of the image bearing member, Ton represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is used for development on the surface of the image bearing member, and r represents a radius of the image bearing member, and an uppermost layer of the image bearing member comprises fluorine resin particulates and the following relationship is satisfied;
0.15 (μ
m)≦
D≦
3 (μ
m),wherein D represents an average diameter of projection images of the fluorine resin particulates surfacing on the uppermost layer, and a total area of the projection images of the fluorine resin particulates is not less than 10% based on a total surface area of the uppermost layer. - View Dependent Claims (17)
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18. A process cartridge comprising:
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an image bearing member configured to bear a latent electrostatic image; at least one device selected from a group including a charging device configured to charge the image bearing member, a developing device configured to develop the latent electrostatic image with a toner, a transfer device configured to transfer the developed image to a recording medium and a discharging device; and a cleaning device comprising a cleaning blade, configured to remove a toner remaining on a surface of the image bearing member by contacting the cleaning blade therewith, wherein the process cartridge is configured to be detachably attached to an image forming apparatus and a static friction coefficient μ
of the image bearing member ranges from 0.1 to 0.3, a contact pressure of the cleaning blade to the image bearing member ranges from 1.5 to 10 g/cm, and the image bearing member and the cleaning blade satisfy the following relationships (1) and (2);
0.01 (kg)≦
(Toff−
T0)/r≦
0.15 (kg)
Relationship (1)
1.2≦
(Ton−
T0)/(Toff−
T0)≦
3.8,
Relationship (2)wherein T0 represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is not in contact with the surface of the image bearing member, Toff represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is not used for development on the surface of the image bearing member, Ton represents a rotation torque (kgcm) of the image bearing member when the cleaning blade is brought into contact with the surface of the image bearing member and the toner is used for development on the surface of the image bearing member, and r represents a radius of the image bearing member, and an uppermost layer of the image bearing member comprises fluorine resin particulates and the following relationship is satisfied;
0.15 (μ
m)≦
D≦
3 (μ
m),wherein D represents an average diameter of projection images of the fluorine resin particulates surfacing on the uppermost layer, and a total area of the projection images of the fluorine resin particulates is not less than 10% based on a total surface area of the uppermost layer. - View Dependent Claims (19)
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Specification