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:
Sep. 07, 2021
Filed:
Jan. 30, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Kozue Uratani, Mishima, JP;
Daisuke Yoshiba, Suntou-gun, JP;
Shohei Tsuda, Suntou-gun, JP;
Tomoya Nagaoka, Tokyo, JP;
Mariko Yamashita, Suntou-gun, JP;
Kazuki Kaneko, Tokyo, JP;
Ryo Nagata, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A toner comprising a toner particle including a binder resin and a colorant and an external additive, wherein the external additive contains an external additive A having a Feret diameter of 60 to 200 nm, the external additive A is inorganic fine particles or organic-inorganic composite fine particles, adhesion index of the external additive A to the toner is 0.00 to 3.00, and penetration depth b and protrusion height c satisfy Relational expressions (1) and (2) below, where b (nm) denotes penetration depth of the external additive A, at a portion of the external additive A penetrating into the toner particle interior from the surface thereof, and c (nm) denotes a protrusion height of the external additive A at that portion, in an observation of an image resulting from image processing of a cross section of the toner using TEM;60≤≤200  (1),0.15≤/()≤0.30  (2).