Invention Grant
- Patent Title: Toner, developer, and image forming apparatus
- Patent Title (中): 调色剂,显影剂和成像装置
-
Application No.: US13609627Application Date: 2012-09-11
-
Publication No.: US08685604B2Publication Date: 2014-04-01
- Inventor: Yoshihiro Moriya , Masahide Yamada , Taichi Nemoto , Yukiko Nakajima , Yoshitaka Yamauchi , Daiki Yamashita , Keiji Makabe , Akiyoshi Sabu , Suzuka Amemori
- Applicant: Yoshihiro Moriya , Masahide Yamada , Taichi Nemoto , Yukiko Nakajima , Yoshitaka Yamauchi , Daiki Yamashita , Keiji Makabe , Akiyoshi Sabu , Suzuka Amemori
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-199274 20110913; JP2011-257091 20111125; JP2012-137750 20120619
- Main IPC: G03G9/087
- IPC: G03G9/087 ; G03G9/08

Abstract:
A toner including a colorant and a first binder resin is provided. The first binder resin has first and second glass transition points at a temperature Tg1 of −20 to 20° C. and a temperature Tg2 of 35 to 65° C., respectively, measured by a differential scanning calorimeter at a heating rate of 5° C./min. A ratio h1/h2 of a baseline displacement h1 observed in the first glass transition point to a baseline displacement h2 observed in the second glass transition point is less than 1.0. The first binder resin has a structure in which a first phase is dispersed in a second phase. The first and second phases consist of portions having larger and smaller phase difference values, respectively, than an intermediate value between maximum and minimum phase difference values in a binarized phase image obtained by an atomic force microscope with a tapping mode method.
Public/Granted literature
- US20130065172A1 TONER, DEVELOPER, AND IMAGE FORMING APPARATUS Public/Granted day:2013-03-14
Information query