发明授权
US07643767B2 Transfer-fixing unit and image forming apparatus for enhanced image quality
失效
传送固定单元和图像形成设备，用于提高图像质量
- 专利标题： Transfer-fixing unit and image forming apparatus for enhanced image quality
- 专利标题（中）： 传送固定单元和图像形成设备，用于提高图像质量
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申请号： US11681739申请日： 2007-03-02
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公开(公告)号： US07643767B2公开(公告)日： 2010-01-05
- 发明人: Takashi Seto , Takeshi Takemoto , Takashi Fujita , Katsuaki Miyawaki , Hiromitsu Takagaki , Shin Kayahara , Atsushi Nakafuji , Hiromi Tamura , Kazumi Suzuki
- 申请人： Takashi Seto , Takeshi Takemoto , Takashi Fujita , Katsuaki Miyawaki , Hiromitsu Takagaki , Shin Kayahara , Atsushi Nakafuji , Hiromi Tamura , Kazumi Suzuki
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Co., Ltd.
- 当前专利权人： Ricoh Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： JP2006-056158 20060302; JP2006-075921 20060320; JP2006-287318 20061023
- 主分类号： G03G15/01
- IPC分类号： G03G15/01
摘要：
A transfer unit for use in an image forming apparatus includes a transfer belt, and a counter member. The transfer belt, having a given circumferential length, receives an un-fixed image, formed of an image developer, from an image carrier at a first nip, which is defined between the transfer belt and the image carrier. The counter member faces the transfer belt to form a second nip with the transfer belt. The un-fixed image is transferred from the transfer belt to a recording medium passing through the second nip. A slack portion is generated in the transfer belt, when a front edge of the recording medium passes through the second nip. The slack portion of the transfer belt being generated in a first portion of the transfer belt returning from the second nip to the first nip.