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:
Dec. 29, 2020
Filed:
Aug. 06, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Ryuji Murayama, Nagareyama, JP;
Junichi Tamura, Toride, JP;
Kentaro Kamae, Kashiwa, JP;
Hayato Ida, Toride, JP;
Daisuke Yamashita, Matsudo, JP;
Masaharu Miura, Toride, JP;
Takaho Shibata, Tokyo, JP;
Wakiko Katsumata, Kashiwa, JP;
Yuichi Mizo, Toride, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner comprises a toner particle and an external additive, the toner satisfies a certain relationship with regard to σl (C/m) and σs (C/m). The toner is divided into two groups i.e. a first group and a second group with inertial classifier, the first group including a larger size of the toner particles, and the second group including a smaller size of the toner particles, and the number of the toner particles in the first group being substantially equal to the number of the toner particles in the second group. Then, al (C/m) represents an absolute value of average surface charge density of the toner included in the first group, and σs (C/m) represents an absolute value of average surface charge density of the toner included in the second group.