Apparatus for determining image areas for printing

Details Apparatus for determining image areas for printing Apparatus for determining image areas for printing

B - Operations, Transporting

41

F

101/101

B41F 31/00 (2006.01) B41F 33/00 (2006.01) B41K 1/38 (2006.01) B41L 27/00 (2006.01)

Patent

CA 1114673

Abstract of the Disclosure Apparatus for analyzing an image member such as a photographic film bearing an image to be printed and providing information as to the image area. The information may be utilized in determining initial ink key settings for a printing cylinder on which the image is to be printed. The image member is positioned on a support surface and a scanner assembly including a light source and light sensors scans the surface. Light transmission readings are taken from calibration film strips on the support surface and at positions on the support surface corresponding to the locations of the ink key columns of the printing cylinder. The data are calibrated and normalized using the calibration readings. The data are also corrected for the number of layers in the image member. Data from ink key columns which will not be utilized in printing the image analyzed are discarded. A procedure is provided for removing the effect on the data of any non-image material on the image member.

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