Patent ID: 8573592
Filing Date: 2013-11-05
Classification: B65H

Abstract:
1. An inline method for measuring and controlling angular orientation of sheets along a feed path of a print making device including a printed sheet, the printed sheet being a sheet of paper with a paper edge moving along the feed path and a first image printed thereon, comprising the steps of: moving, via a moving unit, the printed sheet past at least one pair of optical sensors to determine, via a computing device, a first skew of the paper edge with respect to a first fixed reference; moving, via the moving unit, the printed sheet past said at least one pair of optical sensors to determine, via the computing device, a second skew of the first image with respect to a second fixed reference; determining, via the computing device, a total skew between the paper edge and the first image using a combination of said first skew and said second skew; and correcting for the total skew for subsequent printing by adjusting the angular orientation of subsequent sheets along the feed path.