Printing Device Overlap Feeding Error Correction
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Solution Overview
Problem
Existing printing devices often perform consecutive overlap-feeding operations without correcting overlap errors, leading to printing issues when the preceding and following media are overlapped in reverse order, resulting in decreased printing quality.
Innovation Solution
A printing device with a controller that uses sensors to detect the position of the following medium and only allows consecutive overlap-feeding if the medium is transported along a normal course, preventing overlap errors by guiding the medium with a guide surface and sensors to ensure correct overlapping order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If consecutive overlap-feeding operation is performed without detecting medium position, then printing throughput is improved, but printing quality deteriorates due to overlap errors
Solution Approach 1:
A sensor detects the position of the following medium during the overlapping operation, providing feedback to the controller. The controller adjusts the feeding speed or position based on this feedback to correct overlap errors, ensuring accurate overlapping while maintaining high printing throughput.
Solution Approach 2:
The sensor detects the leading end of the following medium before the consecutive overlap-feeding operation begins. This preliminary detection allows the controller to pre-adjust the positioning and feeding speed to prevent overlap errors from occurring in the first place.
2Manufacturing precision
If sensor detection is added to prevent overlap errors, then overlapping accuracy is improved, but device complexity increases
Solution Approach 1:
A sensor is introduced as an intermediary component between the medium transport system and the controller. This sensor provides position information to the controller, enabling accurate overlap control without requiring complex direct measurement systems.
Solution Approach 2:
The sensor creates a simple feedback loop that provides position information to the controller, allowing for automated correction of overlap errors without complex manual intervention or sophisticated control algorithms.
Data Source
AI summary
There is provided a printing device which can reduce the frequency at which a consecutive overlap-feeding operation is performed in a state where an overlap error in which a preceding medium and a following medium are overlapped in reverse order is not corrected.