公开(公告)号：EP1550919A1

公开(公告)日：2005-07-06

申请号：EP04029545.3

申请日：2004-12-14

申请人： Ricoh Company, Ltd.

发明人： Satoh, Masahiko c/oRicoh Company, Ltd. ,  Tomita, Masami c/oRicoh Company, Ltd. ,  Soga, Setsuo c/oRicoh Company, Ltd. ,  Yoshikawa, Takahiro c/oRicoh Company, Ltd. ,  Hachisuka, Toshiharu c/oRicoh Company, Ltd. ,  Kohira, Yasuhiro c/oRicoh Company, Ltd. ,  Omura, Ken c/oRicoh Company, Ltd. ,  Shinshi, Akira c/oRicoh Company, Ltd. ,  Iwaya, Naoki c/oRicoh Company, Ltd.

IPC分类号： G03G15/20

CPC分类号： G03G15/2064 ,  G03G2215/2016 ,  G03G2215/2032 ,  G03G2215/2041 ,  G03G2215/2083

摘要： A belt fixing unit, an image forming apparatus incorporating the fixing unit and a toner material suitably used in the fixing unit, capable of obviating undesirable fixing belt deformation and concomitant results of partial underdevelopment of electrophotographic images. The belt fixing unit for use in an image forming apparatus includes at least a fixing roller (1), a heating roller (2), a fixing belt (4), and a pressing roller (8) disposed in contact with the fixing roller (1) to form a fixing nip having the fixing belt (4) intervening in-between, in which the fixing belt (4) includes at least a base member formed of heat-resisting resin having the thickness of 90 µm or smaller, and the fixing belt (4) is exerted by a tensile force of 0.49 N/mm or less. The toner is a low-melting point toner formed by subjecting a toner preparatory solution, which contains at least a prepolymer having a functional group containing a nitrogen atom, polyester, colorant and releasing agent, dispersed in an organic solvent, to extension and/or crosslinking reaction in an aqueous medium.

摘要翻译： 带固定单元，包括定影单元的图像形成装置和适合用于定影单元的调色剂材料，能够消除不期望的定影带变形和电子照相图像的部分不发达的伴随结果。 用于图像形成装置的带固定单元至少包括定影辊（1），加热辊（2），定影带（4）以及与定影辊接触设置的加压辊（8） 1）形成具有中间固定带（4）的定影辊隙，其中定影带（4）至少包括由厚度为90μm或更小的耐热树脂形成的基底构件，以及 定影带（4）通过0.49N / mm以下的张力施加。 调色剂是通过将分散在有机溶剂中的至少含有具有氮原子的官能团的预聚物，聚酯，着色剂和脱模剂的调色剂制备溶液经受延伸和/或调色剂而形成的低熔点调色剂， 在水介质中交联反应。