公开(公告)号：EP0138816A4

公开(公告)日：1985-07-01

申请号：EP83902921

申请日：1983-02-07

申请人： GRAVURE RES INST INC

发明人： GEORGE HARVEY F ,  OPPENHEIMER ROBERT H

IPC分类号： B41F9/00

CPC分类号： B41F9/001

摘要： A method and associated apparatus for applying a charge directly to an impression roll (12) which engages a gravure cylinder (14) of an electrostatic assist gravure press, wherein the improvement comprises the steps of placing a plurality of spaced contacts (26 or 54) capable of applying a charge to the impression roll (12) in direct contact with the surface of the impressionroll (12), arranging the spacing between the contacts (26 or 54) and the width thereof so that predetermined groupings of the contacts (26 or 54) correspond to approximately the various web widths to be used with the gravure press, and controlling the charge applied by the contacts (26 or 54) to the surface of the impression roll (12) to minimize the current leakage between the impression roll (12) and the gravure cylinder (14) in those areas of the impression roll (12) where the impression roll (12) directly engages the gravure cylinder (14) without the interposition of a web (22) therebetween.

公开(公告)号：EP0144315A4

公开(公告)日：1987-09-07

申请号：EP83902196

申请日：1983-06-03

申请人： GRAVURE RES INST INC

发明人： GEORGE HARVEY F ,  TOOR YAIR

IPC分类号： B41C1/04 ,  B44B3/00 ,  G03F5/00 ,  H04N1/06 ,  H04N1/40 ,  H04N1/409

CPC分类号： H04N1/40075 ,  B44B3/004 ,  H04N1/4092

摘要： A method and associated apparatus for converting halftone and screened films (12A and 12B) for use with electromechanical gravure engravers (22), comprising the steps of positioning an array (26) of photosensitive elements adjacent at least one film (12A) having an image thereon in the form of transparent and opaque picture elements (pixels) (30 and 32) having predetermined dimensions, affecting relative movement between the array (26) and the film (12A) for sampling a plurality of pixels of the film by the array (26), assigning a predetermined number of photosensitive elements to a predetermined width of pixels, effectively creating a first sample area (34) bounded by the predetermined width of pixels and a pre-established number of samples, effectively creating a second sample area (36) smaller than the first sample area (34) and bounded by a plurality of pixels, the center of the second sample area (36) being coincident with that of the first sample area (34), counting the photosensitive elements which provide signals indicating transparent pixel areas within the first sample area (34), counting the photosensitive elements which provide signals indicating transparent pixel areas within the second sample area (36), adding the count of the photosensitive elements of the second sample area (36) to the count of the photosensitive elements of the second sample area (36) minus the count of the first sample area (34) to provide a signal representing the percentage dot area (PDA) for use with an electromechanical gravure engraver (22).

摘要翻译： 一种用于转换与机电凹版雕刻机（22）一起使用的半色调和屏蔽薄膜（12A和12B）的方法和相关装置，包括以下步骤：将光敏元件阵列（26）与至少一个具有图像的薄膜（12A） 其以具有预定尺寸的透明且不透明的图像元素（像素）（30和32）的形式影响阵列（26）和膜（12A）之间的相对运动，以通过阵列对膜的多个像素进行采样 将预定数量的光敏元件分配给预定宽度的像素，有效地产生由预定宽度的像素和预定数量的样本界定的第一样本区域（34），有效地产生第二样本区域（36） ）小于所述第一样本区域（34）并且由多个像素界定，所述第二样本区域（36）的中心与所述第一样本区域（34）的中心重合，对所述第一样本区域 其提供指示第一采样区域（34）内的透明像素区域的信号，计数提供指示第二采样区域（36）内的透明像素区域的信号的光敏元件，将第二采样区域 （36）与第二采样区域（36）的光敏元件的计数减去第一采样区域（34）的计数以提供表示与机电凹版雕刻机（22）一起使用的百分比点区域（PDA）的信号 ）。

公开(公告)号：EP0119188A4

公开(公告)日：1984-11-20

申请号：EP82902421

申请日：1982-07-02

申请人： GRAVURE RES INST INC

发明人： GEORGE HARVEY F ,  TOOR YAIR

IPC分类号： B41C1/04 ,  B23K26/08 ,  B41C1/05 ,  C23F1/00 ,  H04N1/23 ,  H04N1/40 ,  B23K9/00 ,  B44C1/22 ,  C03C15/00 ,  C03C25/06 ,  C23F1/02 ,  C25F3/00

CPC分类号： H04N1/23 ,  B23K26/0823 ,  B41C1/05 ,  H04N1/40081

摘要： A method and associated apparatus (10) for forming gravure cells in a gravure cylinder (12) for accurately reproducing an image, including the steps of coating the peripheral surface of a gravure cylinder (12) with an insulating coating (16), revealing a first group of predetermined portions of the coated gravure cylinder (12) by selectively removing the insulating coating (16) overlying portions of the peripheral surface of the gravure cylinder (12), ablating the first group of exposed portions of the gravure cylinder (12) to a predetermined depth, and repeating the revealing and ablating steps until a predetermined number of different groups of predetermined portions of the gravure cylinder (12) have been revealed with each previously revealed group having further portions of the gravure cylinder (12) ablated to a greater predetermined depth during each ablating step to provide a gravure cylinder (12) having the desired pattern of gravure cells of the desired depths for accurately reproducing an image.

摘要翻译： 一种用于在凹版滚筒（12）中形成凹版单元以精确再现图像的方法和相关装置（10），所述方法和相关装置包括用绝缘涂层（16）涂布凹版滚筒（12）的外周表面的步骤， 通过选择性地去除覆盖在凹版滚筒（12）的外周表面的部分上的绝缘涂层（16），烧蚀凹版滚筒（12）的第一组暴露部分，从而涂覆凹版滚筒（12）的第一组预定部分; 并且重复该暴露和消融步骤，直到凹印滚筒（12）的预定数量的不同组的预定部分已经显露，每个先前显露的组具有凹版滚筒（12）的其他部分消融为 在每个消融步骤期间提供更大的预定深度，以提供具有期望深度的期望图案的凹版单元的凹版滚筒（12） 产生一个图像。