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:
Oct. 23, 2012
Filed:
Mar. 12, 2010
Yukio Fujiwara, Numazu, JP;
Hidetoshi Kami, Numazu, JP;
Kazuhiro Egawa, Numazu, JP;
Shinji Nohsho, Numazu, JP;
Mayumi Yoshihara, Numazu, JP;
Mihoko Matsumoto, Susono, JP;
Kohsuke Yamamoto, Zama, JP;
Yukio Fujiwara, Numazu, JP;
Hidetoshi Kami, Numazu, JP;
Kazuhiro Egawa, Numazu, JP;
Shinji Nohsho, Numazu, JP;
Mayumi Yoshihara, Numazu, JP;
Mihoko Matsumoto, Susono, JP;
Kohsuke Yamamoto, Zama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An electrophotographic photoreceptor including a conductive substrate, a photosensitive layer, and a surface layer, which satisfies the following inequations:0.005<()<0.03  (i)0.010<()<0.03  (ii)0.005<()<0.20  (iii)()>()  (iv)()>()  (v)wherein WRa (μm) represents a center-line average roughness of frequency components LHH, LHL, LMH, LML, LLH, and LLL that are obtained by subjecting a one-dimensional data array of a surface profile of the electrophotographic photoreceptor to wavelet transformation multiresolution analysis so as to be separated into 6 frequency components; thinning a one-dimensional data array of the lowest frequency component so that the number of data array is reduced to 1/40; and subjecting the thinned one-dimensional data array to wavelet transformation multiresolution analysis so as to be separated into the 6 frequency components LHH, LHL, LMH, LML, LLH, and LLL.