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. 24, 2013
Filed:
Nov. 01, 2012
Masaki Watanabe, Shizuoka, JP;
Osamu Uchinokura, Shizuoka, JP;
Junichi Awamura, Shizuoka, JP;
Takahiro Honda, Shizuoka, JP;
Satoshi Ogawa, Nara, JP;
Tsuneyasu Nagatomo, Shizuoka, JP;
Hiroshi Yamashita, Shizuoka, JP;
Masaki Watanabe, Shizuoka, JP;
Osamu Uchinokura, Shizuoka, JP;
Junichi Awamura, Shizuoka, JP;
Takahiro Honda, Shizuoka, JP;
Satoshi Ogawa, Nara, JP;
Tsuneyasu Nagatomo, Shizuoka, JP;
Hiroshi Yamashita, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner including a core particle, an inner shell layer covering the core, and an outer shell layer covering the inner shell layer is provided. The core particle includes a resin P. The inner shell layer includes fine particles of a resin A. The outer shell layer includes fine particles of a resin B. The toner satisfies the following formulae (1) to (3):4.5≦½()−()≦14  (1)20≦½()−()≦40  (2)23.5≦½()−()≦40  (3)wherein T½(P), T½(A), and T½(B) represent ½ method temperatures of the resins P, A, and B, respectively, and Tfb(P), Tfb(A), and Tfb(B) represent flow beginning temperatures of the resins P, A, and B, respectively, and wherein the ½ method temperatures and the flow beginning temperatures are measured by a flowtester.