Tandem Image Forming System with Dual Compressing Sections
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Solution Overview
Problem
In tandem image forming systems, the processing load on one image forming apparatus acting as a master machine increases due to the need for both compression and expansion of image data, leading to delays and decreased output performance.
Innovation Solution
The system includes two compressing and expanding sections in each image forming apparatus, allowing the master machine to selectively assign these processes to idle sections, thereby distributing the workload and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the master machine performs both compression and expansion of image data, then the tandem image forming system can operate, but the processing load increases and output performance decreases
Solution Approach 1:
The master machine is divided into multiple independent processing sections (first processing section and second processing section). Each section can independently perform compression or expansion operations, allowing parallel processing and distributing the overall workload across multiple units rather than concentrating all processing in a single section.
Solution Approach 2:
The master machine combines multiple processing sections into a single integrated system. The first and second processing sections work together as a unified processing unit, with the control unit coordinating their operations to handle both compression and expansion tasks simultaneously, achieving better throughput than separate machines could provide.
2Reliability
If the master machine performs both compression and expansion processes, then the system can function, but processing delays occur
Solution Approach 1:
While one processing section is performing compression, another section simultaneously performs expansion operations. This continuous parallel operation ensures that useful processing actions are occurring throughout the system without idle time, eliminating the sequential delays that would occur if one section had to complete all tasks before another could begin.
Solution Approach 2:
The system performs expansion operations in advance while compression is still ongoing. By preparing expanded image data beforehand, the system reduces waiting time for subsequent printing operations, as the data is already ready for output while compression of other data continues in parallel.
Data Source
AI summary
An image forming system includes a first image forming apparatus and a second image forming apparatus coupled in tandem to the first image forming apparatus which are assigned differently to print images on respective different regions on a recording sheet. The first image forming apparatus includes two compressing and expanding sections and is configured to receive both image data to be printed by the first image forming apparatus and image data to be printed by the second image forming apparatus. When performing any one process of a compressing process and an expanding process for the image data to be printed by the first image forming apparatus and a compressing process for the image data to be printed by the second image forming apparatus, a compressing and expanding section being used for no process is selected from the two compressing and expanding sections, and assigned to perform the any one process.


