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:
Jul. 07, 2020
Filed:
Nov. 26, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Kazutoshi Ishida, Mishima, JP;
Kazuaki Nagaoka, Susono, JP;
Minoru Nakamura, Mishima, JP;
Ryo Sugiyama, Mishima, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a developing member capable of sufficiently securing a toner conveyance amount, thereby being capable of suppressing a reduction in image density, even when a solid black image or an image having a high print percentage is continuously output. The developing member includes an electro-conductive substrate and an electro-conductive layer thereon, an outer surface of the developing member includes a first, second and third regions, when surface potentials of the respective regions with scanning probe microscope, and measured surface potential of the respective regions are defined as V1, V2, and V3, respectively, V1 is −0.70 V to −0.50 V, 1.30≤V1/V2≤25.00, and V3 is 0.00 V to 0.50 V.