Dual Reader Image Forming System Sheet Inspection Control
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Solution Overview
Problem
The existing image forming systems do not effectively determine whether a sheet should be inspected, leading to erroneous determinations and increased time and effort for users to correct these errors, particularly when dealing with uneven surfaces or non-standard sheets.
Innovation Solution
An image forming system with a first reader and a second reader, where one reader controls the other based on the reading result, to selectively inspect sheets and prevent erroneous determinations by ensuring only relevant sheets are inspected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inspection is performed on all sheets including embossed sheets, index sheets, and sheets with base images, then the automatic inspection function covers all possible sheets, but erroneous determinations occur and require user correction
Solution Approach 1:
The first reader performs preliminary reading of the sheet before the image forming process to identify sheet types (embossed, index, base image sheets). This preliminary action allows the system to determine in advance which sheets should be excluded from inspection, preventing erroneous determinations before they occur.
Solution Approach 2:
The first reader acts as an intermediary between the sheet input and the main inspection process. It reads the sheet characteristics and provides information to control whether the second reader should perform inspection, serving as a filtering mediator that prevents inappropriate inspection of unsuitable sheets.
2Measurement precision
If all sheets are inspected by comparing with reference image, then comprehensive quality check is achieved, but time and effort for user correction increases due to erroneous determinations
Solution Approach 1:
The system performs preliminary reading with the first reader to identify sheets that should be excluded from inspection. This preliminary classification prevents unnecessary inspection of unsuitable sheets, thereby reducing the number of erroneous determinations and the subsequent user correction time while maintaining thorough inspection of appropriate sheets.
Solution Approach 2:
The first reader extracts and identifies sheets with characteristics that make them unsuitable for inspection (embossed, index, base image sheets). These problematic sheets are effectively taken out from the inspection process before the comparison with reference image occurs, preventing erroneous determinations and reducing user correction burden.
3Adaptability or versatility
If both first reader and second reader operate independently, then reading flexibility is maintained, but system complexity increases and coordination becomes difficult
Solution Approach 1:
The first reader provides feedback information about sheet characteristics to control the operation of the second reader. This feedback mechanism coordinates the two readers efficiently - the second reader operates only when the first reader determines the sheet is suitable for inspection, maintaining flexibility while reducing unnecessary operations and simplifying coordination.
Solution Approach 2:
The first reader serves multiple functions: it reads sheet characteristics for identification, determines sheet type classification, and controls the operation of the second reader. This multi-functionality reduces system complexity by having one reader (the first reader) take on coordination responsibilities rather than requiring separate control mechanisms for both readers.
Data Source
AI summary
An image forming system includes an image former, a first reader, and a second reader. The image former forms an image on a recording medium. The first reader is disposed upstream of the image former in a conveyance direction of the recording medium, and reads the recording medium. The second reader is disposed downstream side of the image former in the conveyance direction of the recording medium, and reads the recording medium. Based on a result of reading the recording medium in one of the first reader and the second reader, the other of the first reader and the second reader is controlled.