| 摘要 |
An automatic screen registration device for a screen having a pair of generally perpendicular intersecting fiducial lines, each of the fiducial lines having first and second edges, the second edge being generally parallel to and to the outside of the first edge, comprising a base plate having a pair of opposing end edges, air cylinders for positioning the screen on the base plate along an adjacent side edge and end edge of the base plate, servo motors for indexing translational movement of the screen on the base plate from the adjacent side and end edges of the base plate, a light source and a light detector for sensing the first edge of each of the intersecting fiducial lines of the screen, a microprocessor for generating a signal upon sensing the first edge of each of the intersecting fiducial lines, and which is responsive to the detection of the first edge for slowing translational movement of the screen, a light source and a light detector for sensing the second edges of each of the intersecting fiducial lines of the screen, and a microprocessor responsive to the detection of the second edge of the fiducial lines for ceasing translational movement of the screen from the adjacent side and end edges of the base plate upon sensing the second edges of each of the intersecting fiducial lines of the screen.
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