Abstract:
There is described a device (1) for offline inspection and color measurement of printed sheets, especially printed sheets for the production of banknotes and like printed securities, comprising (i) a console (10) having a supporting surface (10a) for supporting a sample printed sheet (S), (ii) a multipurpose measuring apparatus (20), which multipurpose measuring apparatus (20) comprises multiple sensors (22, 23) including at least one camera (22) for taking images of selected portions of the sample printed sheet (S) and a color measurement sensor (23) for performing spectrophotometric, colorimetric, and/or densitometric measurements at selected locations on the sample printed sheet (S), (iii) a display (30) for displaying the images taken by the camera (22) and the measurements performed by the color measurement sensor (23), and (iv) a control and processing unit (40) coupled to the multipurpose measuring apparatus (20) and the display (30). The device (1) comprises a moveable sensor beam (200) housing the multipurpose measuring apparatus (20), which moveable sensor beam (200) is displaceable along an x-axis over the supporting surface (10a) of the console (10) and over the entire surface of the sample printed sheet (S) located on the supporting surface (10a), the multiple sensors (22, 23) being mounted on a common sensor head (21) which is displaceable within the moveable sensor beam (200) along a y-axis so that the multipurpose measuring apparatus (20) can selectively take images of selected portions of the sample printed sheet (S) by means of the camera (22) or perform measurements at selected locations on the sample printed sheet (S) by means of the color measurement sensor (23). The control and processing unit (40) is configured to control displacement of the moveable sensor beam (200) along the x-axis and of the sensor head (21) along the y-axis.
Abstract:
There is described a color control pattern (CP) for the optical measurement of colors printed on a sheet-like or web-like substrate (S) by means of a multicolor printing press, especially by means of a multicolor security printing press, which substrate (S) exhibits an effective printed region (EF) having a multicolor printed image comprising a plurality of juxtaposed colored areas (A-H) printed with a corresponding plurality of printing inks of different colors, wherein the color control pattern (CP) is printed in a margin portion (lm) of the substrate (S) next to the effective printed region (EF). The color control pattern (CP) comprises one or more color control strips (a-d) extending transversely to a direction of transport (T) of the substrate (S), each color control strip (a-d) comprising a plurality of distinct color control fields (CF, CF A to CF H ) consisting of printed fields of each relevant printing ink that is printed in the effective printed region (EF). The color control fields (CF, CF A to CF H ) are coordinated to actual usage of the relevant printing inks in the effective printed region (EF) and are positioned transversely to the direction of transport (T) of the substrate (S) at locations corresponding to actual positions where the relevant printing inks are applied in the effective printed region (EF).
Abstract:
There is described a sheet numbering process involving feeding of individual sheets (S) in succession, which individual sheets (S) each carry a plurality of imprints (P) that are arranged in a matrix of rows and columns, and providing unique serial numbers to multiple ones of the plurality of imprints (P) carried by the individual sheets (S). The sheet numbering process comprises numbering of at least some of the individual sheets (S), wherein numbering of the individual sheets (S) is selectively commutable between a first numbering scheme (N1) and at least a second numbering scheme (N2; N2'; N*), different from the first numbering scheme (N1), without interruption of the numbering process. The first numbering scheme (N1) involves providing all imprints (P) of a first subset (S 0 ) of individual sheets (S) with a unique serial number (SN1) of the first numbering scheme (N1). The second numbering scheme (N2; N2'; N*) involves providing all or part of the imprints (P) of a second subset (S'; S*) of individual sheets (S) with a unique serial number (SN2; SN2'; SN*) of the second numbering scheme (N2; N2'; N*). Also described is a sheet-processing machine for carrying out the aforementioned sheet numbering process.
Abstract translation:描述了一张片材编号过程,包括连续送入单张纸(S),该单张纸张(S)各自承载以行和列为矩阵排列的多个印记(P),并提供唯一的序列号 由单张纸(S)承载的多个印记(P)中的多个印记(P)。 片材编号过程包括至少一些单张纸(S)的编号,其中单张纸张(S)的编号在第一编号方案(N1)和至少第二编号方案(N2; N2')之间可选择地换向, ; N *),不同于第一编号方案(N1),而不中断编号处理。 第一编号方案(N1)涉及用第一编号方案(N1)的唯一序列号(SN1)提供单张纸(S)的第一子集(S 0)的所有印记(P)。 第二编号方案(N2; N2'; N *)涉及提供具有唯一序列号(SN2; SN2)的单张纸(S)的第二子集(S'; S *)的全部或部分印记(P) '; SN *)(N2; N2'; N *)。 还描述了一种用于执行上述片材编号处理的片材加工机。
Abstract:
There is described an inspection system (50) for in-line inspection of sheet-like or web-like material on an intaglio printing press, wherein the inspection system comprises an optical quality control apparatus for carrying out inspection of a printed area on a printed side of the sheet-like or web-like material, the optical quality control apparatus including a camera system (55) with at least one line-scan camera (56) for scanning and acquiring an image of the printed area while the sheet-like or web-like material is being transported in the intaglio printing press past the camera system (55). A location of the at least one line-scan camera (56) in the intaglio printing press along a delivery path of the sheet-like or web-like material is selected in such a way that cyclical vibrations that spread periodically throughout the intaglio printing press during operation of the intaglio printing press do not occur while the camera system (55) is scanning the printed area of the sheet-like or web-like material and acquiring a complete image of the printed area.