Duplex Image Forming System Adjustment Timing Control
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Solution Overview
Problem
In duplex printing systems, the application of adjustment values at different timings for the front and back sides of a sheet can result in incongruous image quality, as values updated at fixed intervals may be applied at varying times, leading to inconsistencies between the two sides.
Innovation Solution
The system cyclically conveys sheets to apply updated adjustment values to one side and unupdated values to the other, ensuring that both sides receive consistent adjustments by storing and using appropriate adjustment values during the image forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If adjustment values are updated at fixed timing and applied to both front and back sides, then image quality consistency is improved, but the complexity of managing adjustment value timing increases
Solution Approach 1:
The system performs preliminary actions by storing multiple sets of adjustment values (first set and second set) in advance before image formation. The control unit determines which set to use based on the timing relationship between front and back side image formation, ensuring that consistent adjustment values are applied to both sides without real-time calculation complexity.
Solution Approach 2:
The adjustment values are segmented into multiple sets (first set and second set) with different timing characteristics. The first set is used when front and back sides are formed simultaneously or nearly simultaneously, while the second set is used when there is a significant time gap. This segmentation allows the system to maintain image quality consistency without requiring complex real-time timing management.
2Manufacturing precision
If adjustment values are updated frequently to improve image quality, then image formation accuracy is improved, but the risk of applying inconsistent values to front and back sides increases
Solution Approach 1:
The system incorporates feedback mechanisms where the control unit continuously monitors the timing relationship between front and back side image formation processes. Based on this feedback, the control unit automatically determines which adjustment value set (first or second) to apply, ensuring that frequently updated adjustment values are consistently applied to both sides of the sheet without causing incongruity.
Data Source
AI summary
An image forming system cyclically conveys an Nth sheet with an image formed on a first side to an image forming unit as a sheet subject to image formation after image formation on a subsequent (N+i)th sheet, and form an image on a second side of the Nth sheet. The system includes an obtaining unit that, during image forming processes, obtains respective updated adjustment values for the first and second sides, and a control unit that performs control to simultaneously store the updated adjustment value for the first side and an unupdated adjustment value for the second side in a part of a period of the processes, form an image on the first side of the (N+i)th sheet using the updated one for the first side, and form the image on the second side of the Nth sheet using the unupdated one for the second side.