Method for direct electrostatic printing in which toner particles are
extracted directly from a magnetic brush carrying a two-component
developer with conductive carrier
    2.
    发明授权
    Method for direct electrostatic printing in which toner particles are extracted directly from a magnetic brush carrying a two-component developer with conductive carrier 失效
    用于直接静电印刷的方法,其中调色剂颗粒从带有导电载体的双组分显影剂的磁刷直接提取

    公开(公告)号:US6070966A

    公开(公告)日:2000-06-06

    申请号:US926542

    申请日:1997-09-10

    申请人: Guido Desie Raf Voets

    发明人: Guido Desie Raf Voets

    IPC分类号: G03G9/10 G03G15/34 B41J2/04

    摘要: A method for direct electrostatic printing includes the steps of providing a magnetic brush carrying carrier particles and toner particles, the carrier particles having a specific volume resistivity of between 10.sup.1 .OMEGA..multidot.cm and 10.sup.9 .OMEGA..multidot.cm and a specific density lower than 5 g/cm.sup.3, creating in an electrical field a flow of charged toner particles directly from the magnetic brush to a substrate, image wise modulating the flow of charged toner particles by a printhead structure having printing apertures and control electrodes, image wise depositing toner particles from the image wise modulated flow of charged toner particles on the substrate, and fixing the toner particles to the substrate.

    摘要翻译: 一种用于直接静电印刷的方法包括以下步骤:提供带有载体颗粒和调色剂颗粒的磁刷,所述载体颗粒的体积电阻率介于101欧姆·厘米×10 9欧米伽×厘米,比密度低于5克/厘米3,产生 在电场中,带电的调色剂颗粒直接从磁刷流到衬底,通过具有印刷孔和控制电极的打印头结构,图像地调制带电调色剂颗粒的流动,从图像调制流图像沉积调色剂颗粒 的带电调色剂颗粒,并将调色剂颗粒固定到基底上。

    Process for incorporation of a water-insoluble substance into a
hydrophilic layer
    3.
    发明授权
    Process for incorporation of a water-insoluble substance into a hydrophilic layer 失效
    将水不溶性物质并入亲水层的方法

    公开(公告)号:US5376501A

    公开(公告)日:1994-12-27

    申请号:US227387

    申请日:1994-04-14

    摘要: Processes are disclosed for incorporating a water-insoluble substance in a diffusion resistant form into a hydrophilic colloidal layer of an element. In a first process A the water-insoluble substance is present during the polycondensation of diol(s) or polyol(s) and carboxylic acids, whereby at least 6 mole % of the reagents bear a water-solubilizing group, preferably a sulpho group in the salt form; the obtained mixture of polyester and water-insoluble substance is then dispersed in an aqueous medium. In an alternative process B the polyester is first prepared and then mixed homogeneously with the hydrophobe substance by melting in a reactor or extruder; the mixture is then similarly dispersed. The obtained latex is then incorporated in a hydrophilic colloidal layer which is coated on a support.The obtained element can serve as base for a reprographic image, e.g. a color proof image, or can form part of a complete photographic material.In a preferred embodiment the water-insoluble substance is a brightening agent.

    摘要翻译: 公开了将不溶于扩散的形式的水不溶性物质引入到元件的亲水性胶体层中的方法。 在第一方法A中,在二醇或多元醇和羧酸的缩聚期间存在水不溶性物质,由此至少6摩尔%的试剂具有水溶性基团,优选的是磺基 盐形式; 将得到的聚酯和水不溶性物质的混合物分散在水性介质中。 在替代方法B中,首先制备聚酯,然后通过在反应器或挤出机中熔融而与疏水物质均匀混合; 然后混合物类似地分散。 然后将所得胶乳掺入涂覆在载体上的亲水胶体层。 所获得的元件可以用作复制图像的基底,例如。 彩色图像,或可以形成完整的照相材料的一部分。 在优选的实施方案中,水不溶性物质是增白剂。