The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 2024
Filed:
Jan. 10, 2023
Fujifilm Business Innovation Corp., Tokyo, JP;
Takuya Yamamoto, Kanagawa, JP;
Fuyuki Kano, Kanagawa, JP;
FUJIFILM Business Innovation Corp., Tokyo, JP;
Abstract
A charging member includes: an electrically conductive base; an elastic layer disposed on the electrically conductive base; and a surface layer disposed on the elastic layer. A PFVTF value of a surface of the surface layer is 1.5 or less. The PFVTF value is obtained by Fourier transforming a roughness curve of the surface of the surface layer that is measured in a circumferential direction to thereby obtain amplitude intensities at different periods, multiplying the amplitude intensities at different periods by VTF coefficients at respective periods that are obtained from a visual characteristic VTFL* (f=period) for lightness L* represented by Formula (V) below to thereby obtain corrected amplitude intensities at different periods, and integrating the corrected amplitude intensities in a period range of from 100 μm to 1000 μm inclusive:VTFL*()=5.05×(). Formula (V):