Patent · US Active

Image forming apparatus

US10871726B2 · kind B2 · utility

0Cited by

1References

12Claims

0Family size

Assignee

Canon Kabushiki Kaisha · JP

Inventor

Kota Mori · Abiko, JP

Key dates

Filing date	Apr 24, 2019
Grant date	Dec 22, 2020
Priority date	—
Expiry date	Apr 24, 2039

Classification

Technology area (CPC G)Physics
CPC primaryG03G15/0233
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An image forming apparatus includes an image bearing member configured to bear an image and a charging roller to which a direct current voltage is applied and which is configured to charge a surface of the image bearing member. The charging roller includes a shaft member, an elastic layer formed around the shaft member, and a surface layer formed around the elastic layer. Particles having particle diameters within a range of 2 μm or larger and 15 μm or smaller are dispersed in the surface layer. A maximum height Sz (μm) and an autocorrelation length Sal (μm) with respected to the surface layer of the charging roller satisfy 8≤Sz≤16 and 13≤Sal≤30.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.