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    • 1. 发明授权
    • Electrophotographic liquid developer and image forming apparatus
    • 电子照相液体显影剂和图像形成装置
    • US6146804A
    • 2000-11-14
    • US471266
    • 1999-12-23
    • Hidetoshi MiyamotoToshimitsu FujiwaraShuji IinoMasaharu KanazawaSeishi Ojima
    • Hidetoshi MiyamotoToshimitsu FujiwaraShuji IinoMasaharu KanazawaSeishi Ojima
    • G03G9/13
    • G03G9/13
    • (1) Electrophotographic liquid developer comprising electrically insulating medium liquid and toner dispersed in the medium liquid, wherein the toner has a melt viscosity (.eta.) in a range from 2.times.10.sup.2 poises to 1.times.10.sup.5 poises at 100.degree. C. in a dry state, and has a glass transition temperature of 20.degree. C. or more.(2) Electrophotographic liquid developer comprising electrically insulating medium liquid and toner dispersed in the medium liquid, wherein the toner contains binder resin exhibiting at least one peak in each of ranges of a molecular weight lower than 5000 and of a molecular weight of 5000 or more when detected by a gel permeation chromatography (GPC).(3) An image forming apparatus comprising an electrostatic latent image carrier for forming an electrostatic latent image; a liquid developing device developing the electrostatic latent image formed on the electrostatic latent image carrier into a visible toner image with liquid developer; an intermediate transfer member carrying the toner image transferred thereto from the electrostatic latent image carrier for further transferring the transferred toner image to a record member; and a heating device for heating the intermediate transfer member, wherein the liquid developing device develops the electrostatic latent image with the liquid developer of the above (1) or (2).
    • (1)包含电绝缘介质液体和分散在中等液体中的调色剂的电子照相液体显影剂,其中调色剂在干燥状态下在100℃下的熔体粘度(η)范围为2×102泊至1×105泊,并且具有 玻璃化转变温度为20℃以上。 (2)包含分散在中等液体中的电绝缘介质液体和调色剂的电子照相液体显影剂,其中所述调色剂含有在分子量低于5000且分子量为5000以上的范围内至少具有一个峰的粘合剂树脂 当通过凝胶渗透色谱(GPC)检测时。 (3)一种图像形成装置,包括用于形成静电潜像的静电潜像载体; 液体显影装置,其利用液体显影剂将形成在静电潜像载体上的静电潜像显影成可见的调色剂图像; 中间转印部件承载从静电潜像载体转印到其上的调色剂图像,用于将转印的调色剂图像进一步转印到记录部件上; 以及用于加热中间转印部件的加热装置,其中液体显影装置用上述(1)或(2)的液体显影剂显影静电潜像。
    • 5. 发明授权
    • Liquid developer for electrophotography
    • 电子照相用液体显影剂
    • US5981134A
    • 1999-11-09
    • US45828
    • 1998-03-23
    • Hidetoshi MiyamotoSeishi OjimaToshimitsu Fujiwara
    • Hidetoshi MiyamotoSeishi OjimaToshimitsu Fujiwara
    • G03G9/13G03G9/135
    • G03G9/132G03G9/131G03G9/1355
    • A liquid developer for electrophotography using a polyester resin as a toner binder resin which is suitable for high-speed systems and has excellent stability over time is disclosed.The invention is a novel liquid developer for electrophotography having colored particles dispersed in an electrically insulated fluid medium. The liquid developer includes an oil-soluble ionic surface active agent as a charge controller. According to one embodiment, the colored particles include a binder resin having an acid value of 40 mgKOH/g or higher but less than or equal to 100 mgKOH/g. According to another embodiment, the colored particles include a binder resin having a glass transition temperature Tg of 35.degree. C. or higher but less than or equal to 65.degree. C.
    • 公开了一种使用聚酯树脂作为调色剂粘合剂树脂的电子照相用液体显影剂,其适用于高速系统并且随时间具有优异的稳定性。 本发明是一种用于电子照相的新型液体显影剂,其具有分散在电绝缘流体介质中的着色颗粒。 液体显影剂包括作为充电控制器的油溶性离子表面活性剂。 根据一个实施方案,着色颗粒包括酸值为40mgKOH / g或更高但小于或等于100mgKOH / g的粘合剂树脂。 根据另一个实施方案,着色颗粒包括玻璃化转变温度Tg为35℃或更高但小于或等于65℃的粘合剂树脂。