Document Deskewing Module with Moving Track Bottom
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Solution Overview
Problem
Existing document deskewing modules in self-service depositing terminals are ineffective in handling both currency notes and checks, particularly struggling with limp currency notes that tend to curl and cause jams due to their design limitations.
Innovation Solution
A document deskewing module with a moving track bottom mechanism that uses a combination of hard and soft drive rollers and a moving track bottom belt to provide variable drive force, ensuring that both stiff and limp documents are properly aligned without curling, featuring a top guide assembly and sensors for precise deskewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a document deskewing module is designed to deskew only one type of document (e.g., currency note or check), then the module is effective in deskewing that particular document type, but the module cannot handle both currency notes and checks effectively
Solution Approach 1:
The track bottom is made movable instead of fixed, allowing it to adapt its position dynamically. The track bottom can move vertically to accommodate documents of different types (currency notes or checks) while maintaining proper deskewing function for each document type
Solution Approach 2:
The system changes the position parameter of the track bottom to adapt to different document types. By adjusting the track bottom position, the module can effectively deskew both currency notes and checks despite their different dimensions and properties
2Device complexity
If a document deskewing module uses a fixed track bottom, then the structure is simple, but limp currency notes curl excessively at the corner and cause document jam conditions
Solution Approach 1:
The track bottom is made movable to dynamically adjust to the document being processed. This movement capability allows the system to handle limp currency notes by adapting the track bottom position, preventing excessive corner curling and document jams while maintaining reasonable structural complexity
3Reliability
If the track bottom is made movable to handle limp currency notes, then document jam rates are reduced, but the device complexity increases
Solution Approach 1:
The track bottom is made movable through a mechanism that allows vertical adjustment. This dynamic capability reduces document jam rates by adapting to limp currency notes while keeping the added complexity manageable through a relatively simple actuation mechanism
Solution Approach 2:
The movable track bottom mechanism appears to be self-adjusting or self-regulating based on the document properties, reducing the need for complex external control systems while maintaining reliability in handling different document types
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively deskews documents of varying stiffness, preventing curling and jamming, thereby improving image recognition, magnetic read rates, and reducing document jam rates in self-service depositing terminals.
Implementation Method 1
a moving track bottom mechanism that uses a combination of hard and soft drive rollers and a moving track bottom belt to provide variable drive force
Data Source
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AI summary
A document deskewing module (200) is provided for a self-service bunch document depositing terminal (10). The document deskewing module (200) comprises a set of sensors (208) arranged to detect when a document (280) is deskewed, a set of hard drive rollers (210) disposed along a document transport path (61), a first set of idler rollers (212) moveable towards and away from the hard drive rollers (210), a set of soft drive rollers (310) disposed along the document transport path (61), a second set of idler rollers (312) moveable towards and away from the soft drive rollers (310), a track bottom (250) disposed on one side of the document transport path (61) and movable in the first direction of document travel, and a controller (95). The controller (95) is arranged to (i) control operation of the first and second sets of idler rollers (212,312) in response to signals from the set of sensors (208), and (ii) control operation of the movable track bottom (250) such that a leading front corner (282) of the deskewed document (280) is moved in the first direction of document travel when the corner (282) moves into contact with the track bottom (250) as the document (280) is moving in the second direction of document travel.