Center De-Skew Subassembly for ATM Document Alignment
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Solution Overview
Problem
Current banking machines lack an efficient mechanism for accurately centering and aligning deposited documents, such as checks, which can lead to misalignment and errors during processing.
Innovation Solution
A center de-skew (CDS) subassembly is introduced, comprising a lower-central plate, a transport mechanism, a pair of planar plates, edge-detection sensors, and control logic, which aligns documents parallel to the centerline by moving the planar plates and rotating the document until edge sensors detect its edges, ensuring precise centering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If no centering mechanism is used, then the device complexity is reduced, but the document alignment precision deteriorates
Solution Approach 1:
The patent replaces complex mechanical centering mechanisms with a field-based detection and correction system. Edge detection sensors use optical fields to detect document edges, and the control logic processes this information to activate only the necessary transport mechanism components for alignment, substituting comprehensive mechanical centering with a more selective sensor-actuator system.
Solution Approach 2:
The document itself provides the alignment information through its edges, which are automatically detected by the sensors. The system uses the document's own geometric features (edges) as the reference for centering, eliminating the need for external marking or complex positioning fixtures.
2Measurement precision
If edge detection sensors and control logic are added, then the document centering accuracy is improved, but the device complexity increases
Solution Approach 1:
The edge detection sensors provide real-time feedback about document edge positions to the control logic, which then adjusts the transport mechanism to achieve proper centering. This closed-loop feedback system enables accurate measurement and correction of document alignment without requiring overly complex mechanical precision.
Solution Approach 2:
The control logic acts as an intermediary between the simple edge detection sensors and the transport mechanism. It processes sensor signals and generates appropriate control signals for the transport actuators, bridging the gap between detection and action while keeping each component relatively simple.
Data Source
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AI summary
A center-alignment apparatus for use in an ATM has a transport mechanism to transport a document into the ATM. One or more plates operable in tandem to move the document toward a centerline of a path the document is to travel. Edge-detection sensor(s) on the plate sense an edge of the document when the plate(s) is moved toward the centerline. A translate/rotate mechanism translates and rotates the document while the translate/rotate mechanism transversely moves the document toward the center until another edge-detection sensor detects an edge of the document to create a parallel- aligned document. The control logic controls the plate(s) to centers the parallel-aligned document about the centerline to create a centered document.