Method and device for measuring a position of a passing sheet
First Claim
1. A method of measuring a position of a passing sheet, which comprises:
- transporting a sheet past an image generation system;
imaging margin regions of the sheet and generating projection data;
transmitting the projection data to a computing unit; and
calculating the position of the sheet from the projection data with an image recognition algorithm.
2 Assignments
0 Petitions
Accused Products
Abstract
The position of sheets in a printing press is measured. A problem in transporting sheets through the printing press is how to guarantee the correct orientation and lay of the sheets, which must be guaranteed particularly in the printing operation. There is provided a device for precisely determining and correcting the positions of sheets in printing presses. Margin regions of a sheet are respectively imaged, projection data are transmitted to a computing unit, and the position of the sheet is calculated with the aid of the projection data by way of an image recognition algorithm. Furthermore, the computed positions of the sheet are compared to positions which are stored in the computing unit, and from the comparison, position deviations are computed, which are transmitted to the printing press and corrected by way of a sheet registration device.
32 Citations
14 Claims
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1. A method of measuring a position of a passing sheet, which comprises:
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transporting a sheet past an image generation system;
imaging margin regions of the sheet and generating projection data;
transmitting the projection data to a computing unit; and
calculating the position of the sheet from the projection data with an image recognition algorithm. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for measuring a position of a passing sheet in a sheet-processing device, the device comprising:
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a projection device for imaging the sheet in the sheet-processing device; and
a computing unit connected to said projection device for evaluating imaging data received from said projection device, for evaluating projections of said projection device. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification