Inline Slitters for Edge-to-Edge Printing
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Solution Overview
Problem
Existing printing technologies face challenges in achieving edge-to-edge printing due to misalignment issues with ink applicators, leading to ink wastage, chad formation, and limitations in side-by-side printing.
Innovation Solution
The implementation of an exemplary printer system equipped with inline slitters, edge detectors, and calibration targets, which allows for precise alignment and cutting of print media along transport paths, ensuring accurate ink application and cutting without waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-cutting is applied before printing, then ink application is prevented from falling into space, but ink is wasted and chads of discarded material are created
Solution Approach 1:
The system performs preliminary alignment calibration using calibration targets and detectors before actual printing. The slitter is positioned and aligned in advance based on detected media edges and printed calibration patterns, ensuring that during production no ink is wasted through premature cutting. The actual cutting occurs after precise alignment is established.
Solution Approach 2:
The system uses edge detectors and calibration targets to continuously monitor and feedback on media alignment during the printing process. Based on this feedback, the slitter position is dynamically adjusted to maintain precise alignment with the ink applicator, preventing both ink wastage and the need for pre-cutting.
2Manufacturing precision
If printing beyond target print size is allowed, then edge-to-edge printing is achieved, but excess bleed must be trimmed off creating waste
Solution Approach 1:
The system performs preliminary alignment of the slitter with the ink applicator using calibration targets before production printing. This pre-alignment ensures that the cut edges will precisely match the printed content edges, eliminating the need to print beyond the target size and subsequent trimming of excess material.
Solution Approach 2:
The system replaces manual measurement and mechanical adjustment methods with automated optical detection using edge detectors and printed calibration targets. This substitution enables precise alignment without physical trial-and-error adjustments, ensuring accurate edge-to-edge printing that eliminates material wastage.
3Measurement precision
If manual adjustment is used for alignment, then some degree of precision can be achieved, but productivity is reduced due to periodic emptying and adjustments
Solution Approach 1:
The system performs self-alignment using automated edge detectors and calibration targets that automatically adjust the slitter position without manual intervention. The calibration process is integrated into the printing workflow, allowing the system to maintain precise alignment continuously without periodic stops for manual adjustment or chad removal.
Solution Approach 2:
The alignment calibration is performed continuously or near-continuously during the printing process rather than periodically. The edge detectors continuously monitor media position and the slitter remains dynamically aligned with the ink applicator, eliminating interruptions for manual adjustment and maintaining continuous productive operation.
Data Source
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AI summary
A computer-implemented method for operating a printer comprising providing a controller, an edge detector, and one or more inline slitters attached to a slitter bracket associated with the printer; using the edge detector to determine a lateral position of a print medium along a transport path of the printer; using the controller to move the one or more inline slitter attached to the slitter bracket to an appropriate position for a desired cut; and using the edge detector to make calibration adjustments in real-time.