US 2020/0026234 A1Published application

Cleaning blade, manufacturing method of the cleaning blade, process cartridge and image forming apparatus

AssigneeCanon Kabushiki Kaisha

InventorShingo Hirota

Life of this patent

Estimating the term…

Loading patent…

Abstract

A cleaning blade includes an elastic material, a first surface, a second surface and an end surface. The end surface includes a first region and a second region provided on opposite sides of the first region. The elastic material of the cleaning blade has indentation elastic modulus E0 [MPa] of 3 or more and 20 or less, and indentation elastic modulus E1 [MPa] of the end surface in the first region is (E0+1) or more and 40 or less. Dynamic hardness DH1 [mM/μm2] of the first region is 0.10 or more and 0.20 or less, dynamic hardness DH2 [mM/μm2] of the second region is 0.15 or more and 0.50 or less, and a difference (DH2−DH1) is 0.05 [mM/μm2] or more. A difference in thickness between the end surface in the first region and the end surface in the second region is 25 μm or less.

Claims8

Dependent claims

A cleaning blade for cleaning a surface of an image bearing member, said cleaning blade comprising:

an elastic material as a base material;
a first surface;
a second surface opposite from said first surface with respect to a thickness direction of said cleaning blade;
and
an end surface extending in the thickness direction and connecting said first surface and said second surface,
wherein said cleaning blade is contactable to the image bearing member at an edge line portion between said first surface and said end surface,
wherein said end surface includes a first region including a central position thereof with respect to a longitudinal direction of the image bearing member and includes a second region provided on each of one side and the other side of said first region with respect to the longitudinal direction, and said elastic material has indentation elastic modulus E0 [MPa] of 3 or more and 20 or less at a depth of 1000 μm from said end surface and at an intermediary position between said first surface and said second surface,
wherein indentation elastic modulus E1 [MPa] of said end surface in said first region is (E0+1) or more and 40 or less, dynamic hardness DH1 [mM/μm2] of said first region is 0.10 or more and 0.20 or less, dynamic hardness DH2 [mM/μm2] of said second region is 0.15 or more and 0.50 or less, and a difference (DH2−DH1) in dynamic hardness between said first region and said second region is 0.05 [mM/μm2] or more, and
wherein a difference in dimension in the thickness direction between said end surface in said first region and said end surface in said second region is 25 μm or less.

6 more elements

Dependencies are inferred from the claim text.