Color image forming apparatus with a line velocity difference set between image carriers,申请号US201313749897-传众专利搜索

发明名称	Color image forming apparatus with a line velocity difference set between image carriers
摘要	Provided is a color image forming apparatus that includes: image carriers that form toner image of black and other colors; an intermediate transfer body that makes contact with the image carriers; and transfer units that transfer the toner images on the image carriers to the intermediate transfer body. A line velocity difference is set between the image carriers and the intermediate transfer body. An accelerated cohesion degree of toner is equal to or larger than 54%. A linear velocity difference X1 between the image carrier for black and the intermediate transfer body satisfies a relation of 0<X1≦1.2 mm/sec. A linear velocity difference X2 between the image carriers for the colors and the intermediate transfer body satisfies a relation of 2.1≦X2≦4.0 mm/sec.
申请公布号	US8983323(B2)	申请公布日期	2015.03.17
申请号	US201313749897	申请日期	2013.01.25
申请人	Ricoh Company, Limited	发明人	Yamashita Takeshi;Nagatomo Yuji;Nakatake Naoki;Fujiwara Yasuhiro;Miyazaki Takafumi;Matsuno Yasuhide;Sanada Takahiro;Miyazaki Rumi;Abe Kyoko;Adachi Tomoya;Iwakura Yoshie
分类号	G03G15/16;G03G15/14;G03G15/01;G03G15/00	主分类号	G03G15/16
代理机构	Harness, Dickey & Pierce, P.L.C.	代理人	Harness, Dickey & Pierce, P.L.C.
主权项	1. A color image forming apparatus, comprising: a plurality of image carriers that form a toner image of black and toner images of a plurality of colors excluding black by electrophotography based on image information, and carry the toner images; an intermediate transfer body that makes contact with the image carriers; and a primary transfer unit that transfers the toner images on the image carriers to the intermediate transfer body, wherein a line velocity difference is set between the image carriers and the intermediate transfer body, an accelerated cohesion degree of toner is equal to or larger than 54%, a linear velocity difference X1 between the image carrier for black and the intermediate transfer body satisfies a relation of 0<X1≦1.2 mm/sec within which the linear velocity of the image carrier for black is smaller than the linear velocity of the intermediate transfer body, and a linear velocity difference X2 between the image carriers for the colors except the black and the intermediate transfer body satisfies a relation of 2.1≦X2≦4.0 mm/sec within which the linear velocities of the image carriers for the colors are smaller than the linear velocity of the intermediate transfer body.
地址	Tokyo JP