Selective Decoloring of Multi-Material Images via Authority Marks
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Solution Overview
Problem
Existing image forming apparatuses face security issues and deteriorating image visibility when reusing sheets with decolorable coloring material, as they cannot selectively decolor images using multiple decolorable materials with different temperatures, leading to incomplete removal and potential security breaches.
Innovation Solution
An image processing apparatus that generates authority information for each decolorable coloring material and forms a mark on the sheet, allowing selective decoloring based on this information, using a hybrid system with both decolorable and non-decolorable materials and different decoloring temperatures to ensure secure and clear image formation and decoloring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all images of decolorable coloring material are decolored using a single decoloring temperature, then the decoloring process is simple and fast, but images using materials with different decoloring temperatures cannot be selectively decolored, leading to security issues and poor image visibility on reused sheets
Solution Approach 1:
The patent applies parameter changes by varying the decoloring temperature to selectively decolor different types of coloring materials. The decoloring apparatus can heat the sheet to different temperatures (e.g., first decoloring temperature for first coloring material, second decoloring temperature for second coloring material) to achieve selective decoloring while maintaining operational efficiency
Solution Approach 2:
The patent segments the decoloring process into multiple stages or zones with different temperature settings. This allows different regions of the sheet or different layers of coloring materials to be decolored at appropriate temperatures, enabling selective decoloring of specific materials while preserving others for security purposes
2Ease of repair
If decolorable coloring material is used for sheet reuse, then sheet recycling is enabled, but security problems occur because the decolored image may still be visible or partially visible
Solution Approach 1:
The patent applies local quality by ensuring complete decoloring of specific regions or layers where decolorable coloring material is present, while potentially preserving other regions. The selective decoloring based on temperature ensures that the decolorable material is fully removed in areas where it exists, eliminating security concerns while enabling sheet reuse
Solution Approach 2:
The patent uses temperature control as an intermediary mechanism to differentiate between decolorable and non-decolorable coloring materials. By carefully selecting and controlling the decoloring temperature, the system can selectively target decolorable materials for complete removal while leaving non-decolorable materials intact, thus ensuring security while enabling reuse
3Reliability
If multiple decolorable coloring materials with different decoloring temperatures are used, then image visibility and security can be improved, but the decoloring apparatus cannot selectively decolor them using a single temperature setting
Solution Approach 1:
The patent applies dynamics by making the decoloring temperature adjustable and controllable during the decoloring process. The apparatus can dynamically change temperature settings between different decoloring operations or across different zones, allowing it to adapt to the specific requirements of different coloring materials while maintaining a relatively simple overall device structure
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 ensures secure image reuse by selectively decoloring specific areas with different decolorable materials, maintaining image clarity and enhancing security through controlled decoloring operations based on user authority, thereby addressing security concerns and visibility issues.
Implementation Method 1
heating unit that heats the sheet
Implementation Method 2
decolorable coloring material which can be decolored by a prescribed condition, such as to be heated at a prescribed decoloring temperature
Data Source
AI summary
In one embodiment, an image forming apparatus forms an image on a recording medium using a plurality of decolorable coloring materials having different decoloring conditions. Further, the image forming apparatus forms a mark relating to authority information indicating authority capable of decoloring one of the plurality of decolorable coloring materials for each of the decolorable coloring materials on the recording medium. Further, in another embodiment, a decoloring apparatus grasps the authority information, and decolors the image of the decolorable coloring material, in accordance with the grasped authority information.