	US 7,456,379 B2
	Printing plate registration and optical alignment device including locating at least a part of a reference edge in at least one digital camera image
Richard Neufeld, Burnaby (Canada); Calvin D. Cummings, Surrey (Canada); and Allan Warnes, North Vancouver (Canada)
Assigned to Kodak Graphic Communications Canada Company, Burnaby, British Columbia (Canada)
Filed on Aug. 16, 2005, as Appl. No. 11/204,223.
Application 11/204223 is a continuation in part of application No. 10/356574, filed on Feb. 03, 2003, granted, now 6,968,782.
Prior Publication US 2006/0005728 A1, Jan. 12, 2006
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 27/00 (2006.01)

U.S. Cl. 250—208.1 [250/559.3]

35 Claims

1. A method of imparting a print image on a printing plate, the method comprising:

a) mounting the printing plate on an imaging drum in an orientation wherein a reference edge of the printing plate extends around the drum in a substantially circumferential direction;

b) determining a location of at least one point on the reference edge, wherein the determining comprises for each point:

i) illuminating a region, the region comprising at least a part of the reference edge associated with each point,

ii) capturing at least one digital camera image of the region, and

iii) locating the at least a part of the reference edge in the digital camera image, and

c) imparting the print image on the printing plate in alignment with at least the determined location of the at least one point.