Invention Grant
- Patent Title: Image forming apparatus
- Patent Title (中): 图像形成装置
-
Application No.: US14190459Application Date: 2014-02-26
-
Publication No.: US09042802B2Publication Date: 2015-05-26
- Inventor: Takamasa Hase , Shinya Nakayama , Atsushi Yamamoto , Hideyuki Santo , Minoru Masuda , Yukiko Iwasaki , Tsuneyasu Nagatomo
- Applicant: Takamasa Hase , Shinya Nakayama , Atsushi Yamamoto , Hideyuki Santo , Minoru Masuda , Yukiko Iwasaki , Tsuneyasu Nagatomo
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2013-054298 20130315; JP2014-003692 20140110
- Main IPC: G03G15/20
- IPC: G03G15/20

Abstract:
An image forming apparatus includes: an image bearing member; a charger; an irradiator; a development device having an accommodation unit to accommodate toner to obtain a visible image; a transfer device; and a fixing device to fix the visible image transferred onto a recording medium. The fixing device having a fixing rotation member; and a pressure rotation member to form a nipping portion by contacting the fixing rotation member, wherein the surface pressure of the nipping portion is 1.5 kgf/cm2 or less, wherein the fixing rotation member has a Martens hardness of 1.0 N/mm2 or less at 23° C., wherein the ratio of the projected area of a single particle of the toner onto the recording medium at 120° C. to the projected area of a single particle of the toner onto the recording medium at 23° C. is 1.60 or less.
Public/Granted literature
- US20140270874A1 IMAGE FORMING APPARATUS Public/Granted day:2014-09-18
Information query