Relay Transport Path Speed Control for Recording System Throughput
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Solution Overview
Problem
The existing recording systems experience a reduction in throughput when post-processing is performed, as the interval between sheets of paper needs to be wide to prevent collisions and allow for processing, which decreases the processing speed.
Innovation Solution
A recording system with a relay transport path that widens the interval between sheets of paper closest to the post-processing unit and shortens it upstream, incorporating a correction transport unit for skew correction and varying transport speeds in different paths to prevent collisions and maintain throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wide interval is maintained between the preceding medium and the succeeding medium in the relay transport path to allow post-processing operations, then the post-processing unit can perform stacking and processing without collision, but the throughput of the recording system decreases
Solution Approach 1:
The patent applies dynamics by making the transport speed variable rather than constant. The transport speed is dynamically adjusted based on the medium's position in the transport path and the operational state of the post-processing unit. Specifically, the transport speed is increased when the medium is far from the post-processing unit and decreased when approaching it, allowing continuous high-speed transport while ensuring proper spacing for post-processing operations.
Solution Approach 2:
The patent changes the transport speed parameter along the transport path. By setting different transport speeds in different regions (faster in upstream regions, slower in downstream regions near the post-processing unit), the system optimizes both throughput and post-processing reliability. This parameter change allows the interval between media to be dynamically controlled without reducing overall system productivity.
2Reliability
If the transport speed is reduced to maintain proper interval between media for post-processing, then collision prevention is ensured, but the processing speed and throughput decrease
Solution Approach 1:
The transport speed is made dynamic rather than static. The system continuously adjusts the transport speed based on real-time conditions, including the position of media in the transport path and the operational status of the post-processing unit. This dynamic adjustment ensures collision prevention while maintaining high processing speeds during regions where spacing is less critical.
Solution Approach 2:
The transport path is segmented into multiple regions with different speed requirements. The patent divides the relay transport path into upstream regions where higher speeds are acceptable and downstream regions near the post-processing unit where lower speeds are necessary. This segmentation allows the system to optimize speed in each region independently, preventing collisions while maximizing overall throughput.
3Reliability
If a constant wide interval is maintained throughout the entire relay transport path, then post-processing operations can be performed safely, but the overall throughput and efficiency of the recording system is reduced
Solution Approach 1:
The patent applies local quality by setting different transport speed requirements for different locations in the transport path. Rather than maintaining a uniform wide interval throughout, the system maintains appropriate spacing only in the critical downstream region near the post-processing unit, while allowing faster transport in upstream regions. This localized approach ensures post-processing safety without sacrificing overall system throughput.
Solution Approach 2:
The system dynamically adjusts transport speed based on the medium's position and the post-processing unit's state. The transport speed is increased when media are in upstream regions and decreased when they approach the post-processing unit, creating a dynamic interval management system that optimizes both safety and throughput rather than enforcing a constant wide interval throughout the entire path.
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
This configuration ensures the necessary interval for post-processing while minimizing the reduction in throughput by optimizing the transport path and speeds, allowing for efficient processing and drying of sheets.
Implementation Method 1
a recording unit that performs recording by ejecting liquid onto a medium to be transported
Implementation Method 2
a correction transport unit that is provided in the relay transport path and to which a leading edge of the medium is butted to perform a skew correction operation and then to transport the medium
Data Source
AI summary
There is provided a recording system that can suppress a reduction in throughput when post-processing is performed in a post-processing apparatus.