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11.发明授权
公开(公告)号：US6071369A
公开(公告)日：2000-06-06
申请号：US949189
申请日：1997-10-14
CPC分类号： B41M5/366 , B41C1/1025 , B41C2210/04 , B41C2210/06 , B41C2210/08 , B41C2210/24 , B41C2210/262 , G03F7/24 , Y10S430/165
摘要： According to the present invention there is provided a method for making a lithographic printing plate comprising the image-wise exposure of a heat-sensitive imaging element with a laser and developing said imaging element by rinsing it with plain water or an aqueous solution. To improve ink-uptake the imaging element is exposed on an external drum recorder whereby the pixel dwell time of the laser is above 0.1 .mu.s
摘要翻译： 根据本发明，提供了一种制备平版印刷版的方法，其包括用激光成像曝光热敏成像元件并通过用纯水或水溶液冲洗来显影所述成像元件。 为了改善吸墨性，成像元件暴露在外部鼓式记录器上，因此激光器的像素驻留时间大于0.1μs
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公开(公告)号：US5635321A
公开(公告)日：1997-06-03
申请号：US554855
申请日：1995-11-07
CPC分类号： G03F7/2055 , H04N1/047 , H04N1/1008 , H04N1/1135 , H04N2201/04729 , H04N2201/04789 , H04N2201/04791
摘要： A modulated writing light beam (18) having a wavelength to which an imaging element (33) is sensitive and a reference light beam (46) having a wavelength to which the imaging element (33) is insensitive are generated and simultaneously directed to a moving optical device (22) to cause the writing light beam (18) to scan across the surface of the imaging element (33) in a first scanning direction (C) and the reference light beam (46) to scan across the surface of a light detecting element (50) in the first scanning direction (C) to generate signals indicative of the position of the writing light beam (18) on the surface of the imaging element (33). The writing light beam (18) is modulated and the imaging element (33) is moved in a second scanning direction (B) in response to the signals generated by the light detecting element (50). Thereafter the exposed imaging element (33) is processed to prepare a lithographic printing plate. The invention is applicable to both positive and negative imaging working systems.
摘要翻译： 产生具有成像元件（33）敏感的波长的调制写入光束（18）和具有成像元件（33）不敏感的波长的参考光束（46），同时指向移动 光学装置（22），以使写入光束（18）沿第一扫描方向（C）跨越成像元件（33）的表面扫描并且参考光束（46）扫过光的表面 检测元件（50）沿第一扫描方向（C）产生指示成像元件（33）的表面上的书写光束（18）的位置的信号。 响应于由光检测元件（50）产生的信号，调制写入光束（18）并且成像元件（33）在第二扫描方向（B）上移动。 此后，对曝光的成像元件（33）进行处理以制备平版印刷版。 本发明适用于正，负成像工作系统。
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13.发明授权
公开(公告)号：US5587271A
公开(公告)日：1996-12-24
申请号：US538029
申请日：1995-10-02
CPC分类号： B41N3/08
摘要： The present invention provides a method for lithographic printing comprising the following steps:preparing a lithographic printing plate according to the silver salt diffusion transfer process by (1) image-wise exposing an imaging element comprising on a support a photosensitive layer comprising a silver halide emulsion and an image receiving layer containing physical development nuclei in water permeable relationship with said emulsion layer, (2) developing said imaging element in the presence of developing agent(s) and silver halide solvent(s) using an alkaline processing liquid and (3), if said emulsion layer is overlying said image receiving layer, removing the layers overlying said image receiving layer,mounting said lithographic printing plate to a lithographic printing press, andprinting while supplying to said lithographic printing plate a dampening solution and a printing ink characterized in that the dampening solution as used on the printing plate contains less than 1.0 g/l of a transparent pigment with an average grain diameter of less than 0.1 .mu.m and at least 0.35 g/l of a clay incorporating an inorganic polyphosphate peptiser.
摘要翻译： 本发明提供一种用于平版印刷的方法，包括以下步骤：通过以下步骤制备根据银盐扩散转移方法的平版印刷版：（1）将包含在载体上的成像元件成像曝光，所述感光层包含卤化银乳剂 以及包含与所述乳剂层具有水可渗透关系的物理发育核的图像接收层，（2）使用碱性处理液在显影剂和卤化银溶剂的存在下显影所述成像元件，和（3） 如果所述乳剂层覆盖所述图像接收层，则去除覆盖所述图像接收层的层，将所述平版印刷版安装到平版印刷机上，并且在向所述平版印刷版提供润版溶液和印刷油墨时进行印刷，其特征在于 在印版上使用的润版溶液含量小于1.0g 平均粒径小于0.1μm的透明颜料和至少0.35g / l的掺有无机聚磷酸盐胶溶剂的粘土。
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