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

VSEngineering 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

Engineering Contradiction:
Improveoutput performanceVSAvoidprocessing load
Core Design Contradiction:
ProductivityVSDevice complexity

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.

Inventive Principle:
Principle #1Segmentation

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.

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If the master machine performs both compression and expansion processes, then the system can function, but processing delays occur

Engineering Contradiction:
Improvesystem functionalityVSAvoidprocessing delay
Core Design Contradiction:
ReliabilityVSLoss of time

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.

Inventive Principle:
Principle #20Continuity of useful action

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.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS8994962B2Image forming system and control method for the same
Publication Date: 2015.03.31 KONICA MINOLTA BUSINESS TECH INC
  • US8994962B2 patent drawing
  • US8994962B2 patent drawing
  • US8994962B2 patent drawing

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.