B - Operations – Transporting – 41 – B
Patent
B - Operations, Transporting
41
B
95/15
B41B 13/00 (2006.01)
Patent
CA 1103970
Abstract A method of correcting for mis-alignment of the lens in a photocomposing machine is disclosed. The method comprises establishing a desired base line on a target, forming and projecting a small image through the lens onto the target, rotating the lens until the image falls on the line, measuring the lateral shift of the image due to the rotation, storing electrical signals representative of the shift, and utilizing the signal to correct the motion of the character spacing mechanism when the lens is being used to project characters so as to accurately locate the character images on a recording surface. Preferably, the image forming step includes projecting a laser beam through a small aperture towards the lens. The measuring step may comprise establishing a reference position on an array of closely spaced photocells, magnifying the image from the lens and projecting the magnified image onto the array, detecting the distance of the magnified image from the reference position, and con- verting the distance into electrically coded signals.
365161
Moyroud Louis M.
Smart & Biggar
LandOfFree
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