公开(公告)号：EP1701220A4

公开(公告)日：2009-05-06

申请号：EP04773205

申请日：2004-09-16

申请人： RICOH KK

发明人： NAKAYAMA SHINYA ,  MOCHIZUKI SATOSHI ,  IWAMOTO YASUAKI ,  ASAHINA YASUO ,  KOTSUGAI AKIHIRO ,  ISHII MASAYUKI ,  UCHINOKURA OSAMU ,  NAKAJIMA HISASHI ,  ICHIKAWA TOMOYUKI ,  UTSUMI TOMOKO ,  SAKATA KOICHI ,  SUGIURA HIDEKI ,  EMOTO SHIGERU ,  AWAMURA JUNICHI ,  TOMITA MASAMI ,  HONDA TAKAHIRO ,  YAGI SHINICHIRO ,  SUZUKI TOMOMI ,  YAMADA HIROSHI ,  NANYA TOSHIKI

IPC分类号： G03G9/087 ,  G03G20060101 ,  G03G5/08 ,  G03G9/08

CPC分类号： G03G9/0804 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0827 ,  G03G9/08708 ,  G03G9/08711 ,  G03G9/08755 ,  G03G9/08797

摘要： A toner that is applicable to low temperature fixing systems, excelling in both of anti-offsetting property and heat resistance storability and especially even when repeatedly used for a multiplicity of sheets over a prolonged period of time, is free from aggregation of toner particles, being minimized with respect to deterioration of fluidity, transferability and fixability, and that irrespective of the type of transfer medium, can form stable images free of transfer omission with high reproduction performance, and that does not stain the fixing apparatus and images; etc. There is provided a toner comprised of toner materials, characterized in that providing that Tma (°C) refers to the 1/2 outflow temperature, measured by Koka-type flow tester, of the toner and Tmb (°C) to the 1/2 outflow temperature, measured by Koka-type flow tester, of melt kneading matter of the toner, the relationship 0°C ≤ ΔTm (wherein ΔTm = Tma - Tmb) ≤ 20°C is satisfied and the Tma is in the range of 130 to 200°C.

公开(公告)号：EP1553458A4

公开(公告)日：2008-09-03

申请号：EP03736310

申请日：2003-06-30

申请人： RICOH KK

发明人： YAGI SHINICHIRO ,  YAMADA HIROSHI ,  YAMASHITA HIROSHI ,  WATANABE NAOHIRO ,  SUGIYAMA TSUNEMI ,  EMOTO SHIGERU ,  TOMITA MASAMI ,  NANYA TOSHIKI ,  TAKIGAWA TADAO

IPC分类号： G03G9/08 ,  G03G9/087 ,  G03G9/097 ,  G03G15/08 ,  G03G15/20

CPC分类号： G03G9/087 ,  G03G9/08 ,  G03G9/0819 ,  G03G9/0825 ,  G03G9/0827 ,  G03G9/08755 ,  G03G9/08795 ,  G03G9/08797

摘要： Electrostatic charge image developing toner which has a small particle size essential for attaining a high-quality image, and can output a high-quality image excellent in triboelectric characteristics and free from scumming, characterized in that the volumetric average particle size of the toner is 2.0-7.1 mum and the surface condition of the toner is a scab form.