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    Lithographic imaging with non-ablative wet printing members
    1.
    发明授权
    Lithographic imaging with non-ablative wet printing members 失效
    非烧蚀湿印刷构件的平版印刷成像

    公开(公告)号：US06374738B1

    公开(公告)日：2002-04-23

    申请号：US09564339

    申请日：2000-05-03

    申请人： Thomas E. Lewis ,  Frederick R. Kearney ,  Eugene L. Langlais, II ,  Steven J. Frank

    发明人： Thomas E. Lewis ,  Frederick R. Kearney ,  Eugene L. Langlais, II ,  Steven J. Frank

    IPC分类号： B41C110

    CPC分类号： B41C1/1016 ,  B41C2201/04 ,  B41C2201/14 ,  B41C2210/02 ,  B41C2210/04 ,  B41C2210/08 ,  B41C2210/24

    摘要： Lithographic imaging using non-ablative printing members combines the benefits of simple construction, the ability to utilize traditional metal base supports, and amenability to imaging with low-power lasers that need not impart ablation-inducing energy levels. A representative printing member has a topmost layer that is ink-receptive and does not significantly absorb imaging radiation, a second layer thereunder that is hydrophilic and does absorb imaging radiation, and a metal substrate under the second layer. The printing member is selectively exposed to laser radiation in an imagewise pattern, and laser energy passes substantially unabsorbed through the first layer and is absorbed by the second layer. Heat builds up in the second layer sufficiently to detach the first layer, which is formulated to resist reattachment. But the first layer and, more significantly, the third layer act to dissipate heat from the second layer to prevent its ablation. Where the printing member has received laser exposure—that is, where the first and second layers have been detached—remnants of the first layer are readily removed to produce a finished printing plate.

    摘要翻译： 使用非烧蚀印刷部件的平版印刷成像结合了简单结构的优点，利用传统金属基底支架的能力，以及使用不需要赋予消融诱导能量水平的低功率激光器成像的优点。 代表性的印刷部件具有吸收墨水且不显着吸收成像辐射的最顶层，其下面是亲水的并且吸收成像辐射的第二层，以及在第二层下面的金属基底。 打印构件以成像图案选择性地暴露于激光辐射，并且激光能量基本上未被吸收穿过第一层并被第二层吸收。 热量在第二层中积聚起来，足以分离第一层，其被配制成抵抗重新附着。 但是第一层，更重要的是第三层起第二层的作用，以消散第二层的热量，以防止其消融。 在印刷部件已经接收到激光曝光的情况下，也就是说，在第一层和第二层已经被分离的地方 - 第一层的残余物容易地被去除以产生成品印刷版。