Patent ID: 7715778
Filing Date: 2010-05-11
Classification: G03G

Abstract:
1. A cleaning blade, for use in an image-forming apparatus, for removing toner which remains on a surface of a photoreceptor drum thereof, with said cleaning blade in contact with said photoreceptor drum, wherein said cleaning blade is formed from a sheet composed of a thermosetting elastomer composition; a roughness degree of a ridgeline formed longitudinally on a cleaning blade edge which contacts said photoreceptor is set to not more than 10 μm, and a straightness degree of said ridgeline is set to not more than 100 μm; and in a test of supplying 150,000 sheets of paper conducted by mounting said cleaning blade on said image-forming apparatus, a change rate ΔRe of an average roughness degree value Re of said ridgeline formed longitudinally on said edge is set to not more than +0.7, and a sectional length Ws45 of a wear surface of said edge, inclined at 45 degrees, which contacts said photoreceptor is set to not more than 50 μm.