Primary Transfer Roller Dynamics for Color Misregistration Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses struggle to perform accurate color misregistration correction across various print modes with different numbers of colors or color combinations, as existing technologies are not adaptable to multiple types of print modes and rely on calibration timing adjustments that do not account for diverse color configurations.
Innovation Solution
The apparatus includes multiple image forming units, primary transfer sections, and a crimping/release mechanism that adjusts the intermediate transfer belt's tension based on the combination of image forming units used, allowing for dynamic color misregistration adjustment by switching between crimping and release positions of the primary transfer sections, and utilizing a hardware processor to perform real-time correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the intermediate transfer belt is stretched by multiple rollers to maintain stable image formation, then image formation stability is improved, but the belt cannot be easily separated from the photosensitive drum when print modes are switched
Solution Approach 1:
The primary transfer roller is designed to be movable between a crimping position (contacting the intermediate transfer belt) and a release position (separated from the belt). This dynamic positioning allows the system to switch between maintaining belt tension for stable image formation and releasing the belt for easy separation when switching print modes, resolving the contradiction between stability and adaptability
2Measurement precision
If registration patterns are formed on the intermediate transfer belt under multiple pressing force conditions, then color misregistration correction accuracy is improved, but the device complexity and calibration process become more complex
Solution Approach 1:
The system dynamically adjusts the pressing force of the primary transfer roller based on the selected print mode (single-color, multi-color, calibration modes). By matching the pressing force to the actual usage condition, the system achieves accurate color misregistration detection without requiring multiple static calibration sets, thus improving precision while controlling complexity
Solution Approach 2:
The system changes the pressing force parameter of the primary transfer roller according to different print modes. During calibration, a calibration-specific pressing force is applied to form registration patterns, while during normal operation, operation-specific pressing forces are used. This parameter adaptation allows accurate measurement under each condition without requiring permanently complex calibration infrastructure
3Measurement precision
If the primary transfer roller maintains constant contact with the intermediate transfer belt, then color misregistration correction accuracy is improved, but unnecessary rubbing and deterioration occur when certain image forming units are not used
Solution Approach 1:
The primary transfer roller is dynamically positioned based on which image forming units are actively used. When all units are used, the roller maintains contact for accurate color misregistration correction. When some units are inactive, the roller moves to a release position that prevents unnecessary rubbing between the intermediate transfer belt and inactive photosensitive drums, thus eliminating deterioration while preserving correction accuracy when needed
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
This solution enables precise color misregistration adjustment across multiple print modes with different color combinations, ensuring high-quality image formation by dynamically adjusting the intermediate transfer belt's tension and performing real-time color correction, thereby supporting a wide range of print modes.
Implementation Method 1
a plurality of primary transfer sections 21Y, 21M, 21C, 21K, and 21S that are each provided facing a corresponding one of the plurality of image carriers 31Y, 31M, 31C, and 31K and form a transfer nip by being urged toward the image carrier from an inner peripheral surface side of the intermediate transfer belt 22
Data Source
AI summary
The image forming apparatus includes a crimping/release mechanism that switches between a crimping position where a transfer nip is formed and a release position where the intermediate transfer belt and the photosensitive drum are separated from each other, by moving at least one primary transfer section of a plurality of primary transfer sections provided facing a plurality of photosensitive drums respectively, and a processor that performs color misregistration adjustment when a combination of image forming units used for image formation is changed.