Sheet Transport Apparatus Orientation Control via Differential Roller Speed
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Solution Overview
Problem
Conventional banknote processing apparatuses become large in size and have complex control systems due to the need for multiple rotation processes to change the orientation of banknotes from long-edge to short-edge transport, which complicates the transfer between correction rollers.
Innovation Solution
A sheet transport apparatus with a first and second direction changing roller arranged perpendicular to the transport path, where the first roller rotates slower than the second roller to change the banknote orientation efficiently, reducing the need for multiple rotation processes and simplifying control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple correction rollers are used to change banknote orientation by controlling rotation angles, then the orientation change capability is improved, but the apparatus size and control system complexity increase
Solution Approach 1:
The patent combines multiple correction rollers into a single direction-changing roller that performs both orientation correction and transport functions. Instead of using separate upstream and downstream correction rollers with independent rotation angle control, the invention uses one roller that integrates these functions, thereby reducing the number of components and simplifying the control system while maintaining the ability to change banknote orientation.
Solution Approach 2:
The direction-changing roller is designed to perform multiple functions: it serves as both a transport roller and a correction roller. By making the roller universal, the patent eliminates the need for dedicated correction rollers, reducing apparatus size and control complexity while preserving orientation change capability.
2Manufacturing precision
If multiple rotation processes are used to change banknote orientation, then the orientation control precision is improved, but the processing time and system complexity increase
Solution Approach 1:
The patent segments the orientation control function into a single rotational action rather than multiple sequential rotation processes. By dividing the control task into one precise rotation operation performed by the direction-changing roller, the system achieves orientation control precision without requiring multiple time-consuming rotation steps.
Solution Approach 2:
The direction-changing roller is pre-configured with the appropriate rotation angle to achieve the desired orientation change in a single action. This preliminary setup eliminates the need for multiple adjustment steps, reducing processing time while maintaining control precision.
Data Source
AI summary
A sheet transport apparatus includes a first direction changing roller arranged along a transport path, wherein a sheet is transported along the transport path; a second direction changing roller disposed on the transport path, wherein the first direction changing roller and the second direction changing roller are next to each other in a direction perpendicular to the transport path, and the first direction changing roller and the second direction changing roller change an orientation of the sheet from a first orientation to a second orientation; and a control circuit configured to control one of the first direction changing roller and the second direction changing roller so that the first direction changing roller rotates slower than the second direction changing roller so as to change the orientation of the sheet from the first orientation to the second orientation.