Image Position Correction for Duplex Media Deviation
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Solution Overview
Problem
Existing image positioning devices fail to accurately adjust the position of images on both faces of a recording medium due to inaccuracies in grasping the shape of the medium during the fixing process, leading to relative positional deviations between the front and back faces.
Innovation Solution
An image forming apparatus that includes an image forming device, a reading device, and circuitry to scan position detection marks on both faces of the recording medium, calculate correction values based on scanned images, and adjust the image position accordingly to ensure accurate alignment on both faces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an image positioning device adjusts image position based on scanned images, then image position accuracy is improved, but relative positional deviation between first face and second face occurs due to inaccurate grasping of recording medium shape
Solution Approach 1:
The patent divides the correction process into three distinct correction values: first correction value for first face image position, second correction value for second face image position, and third correction value for relative positional relationship between faces. This segmentation allows independent optimization of each correction aspect, resolving the contradiction by addressing both individual face accuracy and inter-face alignment separately.
Solution Approach 2:
The patent introduces a third correction value that specifically addresses the relative positional relationship between first and second faces by utilizing shape information of the recording medium. This parameter change enables dynamic adjustment of the third correction value based on detected shape variations, thereby maintaining accurate relative positioning despite medium deformation during fixing.
2Measurement precision
If manual adjustment with highly dedicated skill is used, then image position accuracy is improved, but productivity and ease of operation deteriorate
Solution Approach 1:
The patent implements an automated image positioning system that performs scanning, shape detection, and multi-parameter correction without requiring manual intervention. The system automatically calculates first, second, and third correction values based on scanned images and shape information, eliminating the need for highly skilled manual adjustment while maintaining high positioning accuracy and improving productivity.
Solution Approach 2:
The patent employs a feedback mechanism where the image positioning device scans the recorded images, detects the actual positions and shape variations, and automatically adjusts image positioning using calculated correction values. This closed-loop feedback system replaces manual skill-based adjustment with automated control, improving both accuracy and efficiency.
3Measurement precision
If known image positioning devices adjust image position on each face independently, then individual face image position is improved, but relative positional deviation between faces occurs
Solution Approach 1:
The patent segments the correction process into three distinct correction values: first correction value for first face image position, second correction value for second face image position, and third correction value for relative positional relationship between faces. This segmentation allows independent optimization of each correction aspect, resolving the contradiction by addressing both individual face accuracy and inter-face alignment separately.
Solution Approach 2:
The patent merges the correction processes by integrating shape information of the recording medium into the calculation of the third correction value, which coordinates the relative positional relationship between first and second faces. This merging ensures that corrections on both faces are coordinated to maintain accurate relative positioning, preventing deviation between faces while preserving individual face accuracy.
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
The apparatus effectively eliminates positional deviations by calculating and applying correction values, ensuring precise image alignment on both faces of the recording medium, even considering variations in shape and size due to cutting errors or environmental factors.
Implementation Method 1
The reading device is configured to scan the recording medium having a position detection mark on the recording medium as the image and generate a scanned image
Data Source
AI summary
An image forming apparatus, in which an image forming method is performed, includes an image forming device to form an image on a recording medium, a reading device to scan the recording medium having a position detection mark and generate a scanned image, and circuitry to calculate a plurality of correction values to adjust a position of the image to be formed on the recording medium, based on the scanned image. The circuitry is configured to calculate a first correction value based on a first scanned image generated from a first face of the recording medium, calculate a second correction value based on a second scanned image generated from a second face of the recording medium, and calculate a third correction value to adjust a position of an image to be formed on the second face, based on the first scanned image using the first correction value.