Calibration Pattern for Printer Misalignment Detection
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Solution Overview
Problem
Misalignments between printers and folding apparatuses, printer skew, folding skew, and incorrect dimensions in folded packages can significantly affect the quality of output, necessitating effective detection and correction methods.
Innovation Solution
A method involving the use of calibration patterns with graduated measurement scales printed on recording media to detect misalignments, allowing for corrective actions to be taken and ensuring accurate alignment between printers and folding apparatuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If misalignment detection is not implemented, then the system operates without additional complexity, but the output quality deteriorates due to misalignments
Solution Approach 1:
The calibration pattern is printed beforehand on the recording medium before the actual printing operation. This preliminary printed pattern serves as a reference for subsequent alignment detection, allowing the system to identify and correct misalignments before they affect production quality
Solution Approach 2:
A calibration pattern acts as an intermediary element between the printer and folding apparatus. This pattern includes measurement scales that serve as a common reference frame, enabling the detection of misalignments by comparing the printed pattern's position against the folding apparatus's reference positions
2Measurement precision
If calibration patterns with measurement scales are printed, then misalignment detection precision is improved, but the printing process time increases
Solution Approach 1:
The calibration pattern is printed only once as a preliminary step, rather than continuously during production. This partial action approach achieves the necessary measurement precision while minimizing the time penalty, as the pattern serves multiple detection cycles
Solution Approach 2:
The calibration pattern printing is performed in advance before the main printing operation. This preliminary action allows for accurate misalignment detection setup without interrupting or significantly extending the production printing process
3Manufacturing precision
If alignment correction is implemented, then manufacturing precision is improved, but the operational complexity increases
Solution Approach 1:
The system uses the printed calibration pattern to generate feedback information about misalignments. By detecting the position of measurement scales in the printed pattern against reference positions, the system provides feedback that guides correction actions, making the complex alignment correction process more manageable and automated
Data Source
AI summary
Examples of a method for detecting misalignment cause a printer to print a calibration pattern on a recording medium sheet. The calibration pattern includes graduated measurement scales positioned so that: when the calibration pattern is printed without misalignment on a recording medium sheet of predetermined dimensions, matching graduations of plural measurement scales in the calibration pattern are printed at respective reference locations on the recording medium sheet that correspond to corners of the recording medium sheet (or to spaced positions along a line where folding of the recording medium sheet by a folding apparatus is intended to take place). When the calibration pattern is printed with misalignment on a recording medium sheet of predetermined dimensions, non-matching graduations of the plural measurement scales are printed at the reference locations on the recording medium sheet.