Sheet Feeder Edge Correction with Air Blowers and Detectors
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Solution Overview
Problem
Existing sheet-shaped medium feeders face errors and failures when transporting sheets with bent transportation left and right edge portions, as they are not designed to handle such irregularities effectively.
Innovation Solution
A feeder system with vertically movable mount boards, edge air blowers to adjust bent edges, and detectors to monitor and adjust the height differences of the sheets, ensuring proper alignment and separation during transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional suction-only transport is used, then the structure is simple, but sheets with bent edges cause errors and failures in transport
Solution Approach 1:
The transport system is segmented into multiple functional units: suction portion for holding sheets, edge air blowers for correcting bent edges, and detectors for monitoring sheet state. This segmentation allows each component to perform its specific function independently, improving overall transport reliability without creating a monolithic complex system.
Solution Approach 2:
The edge air blowers perform preliminary action by blowing air to the bent edge portions before the sheets enter the suction portion. This pre-correction of bent edges ensures that sheets are properly aligned before being sucked and transported, preventing transport errors while maintaining system simplicity.
2Reliability
If edge air blowers and detectors are added to handle bent edges, then transport reliability improves, but device complexity increases
Solution Approach 1:
The system employs detectors that automatically detect bent edges and trigger the edge air blowers to correct them. This self-service mechanism eliminates the need for manual intervention or complex control systems, as the sheets essentially correct themselves through the automated detection and air-blowing process.
Solution Approach 2:
The patent uses pneumatic principles through edge air blowers that blow air to bent edge portions of sheets. This pneumatic approach provides a simple yet effective means to correct sheet alignment issues without requiring mechanical contact or complex adjustment mechanisms.
3Manufacturing precision
If the system actively corrects bent edges, then sheet alignment improves, but energy consumption increases
Solution Approach 1:
The edge air blowers apply air only to the specific bent edge portions of sheets that require correction, rather than treating all sheets uniformly. The detectors enable selective activation, so energy is consumed only when and where needed, minimizing overall energy consumption while maintaining high alignment precision.
Solution Approach 2:
The system changes the parameter of air flow application based on detected sheet conditions. When bent edges are detected, the air blowers activate with specific flow parameters to correct the bend; when no bends are detected, the system operates in normal suction mode with minimal energy expenditure.
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 system reduces errors and failures by ensuring smooth transport of sheets with bent edges, preventing overlaps and jams, and maintaining proper orientation of sheets during feeding.
Implementation Method 1
a suction portion that sucks the uppermost one of the sheet-shaped media stacked on the mount board
Implementation Method 2
left and right edge air blowers that blow air to left and right edge portions, when viewed from an upstream side in a transportation direction, of upper ones of the sheet-shaped media stacked
Data Source
AI summary
A feeder includes: a mount board that moves vertically while allowing sheet-shaped media to be stacked thereon; a transport device that allows an uppermost one of the sheet-shaped media stacked on the mount board to be sucked by a suction portion to transport the uppermost sheet-shaped medium to a transporter and to feed the uppermost sheet-shaped medium to a destination; left and right edge air blowers that blow air to left and right edge portions, when viewed from an upstream side in a transportation direction, of upper ones of the sheet-shaped media stacked; and left and right detectors that are disposed on left and right sides of the suction portion at the same position in the transportation direction, and that individually detect downward or upward bend amounts of left and right edge portions of the uppermost sheet-shaped medium.