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. 01, 2025
Filed:
Nov. 11, 2021
Canon Kabushiki Kaisha, Tokyo, JP;
Yuzo Seino, Shizuoka, JP;
Kenta Kamikura, Kanagawa, JP;
Noriyuki Doi, Shizuoka, JP;
Takuho Sato, Shizuoka, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing apparatus comprising a toner and a toner bearing member for bearing the toner, wherein the volume resistivity of the toner is from 1.0×10Ω·cm to 1.0×10Ω·cm, a toner bearing member exhibits multiple elementary processes, the volume resistance value Rdr per unit area of the toner bearing member is from 5.0×10Ω/cmto 2.0×10Ω/cm, the capacitance Cdr per unit area of the toner bearing member is from 300 pF/cmto 900 pF/cm, and the capacitance per unit area and volume resistance value of the toner as converted by a parallel plate capacitor model at a thickness of 1.5 times the weight-average particle diameter of the toner are in specific relationships.