Selective Foil Decoration via Localized Softening
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming technologies face challenges in precisely applying metallic luster to desired regions of an image, often resulting in unwanted decoration across the entire image area.
Innovation Solution
An image forming apparatus comprising a conveyor, a softener to narrow the image area, and a powder applicator that applies powder to a specific width of the image, ensuring the metallic luster is only applied to the desired region by controlling the temperature and positioning of the softening section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the foil body is applied to the entire toner image region, then the decoration covers the full image area, but it becomes difficult to apply the foil body only to a desired region for decoration
Solution Approach 1:
The patent applies local quality by creating a temperature difference between the desired decoration region and the rest of the image. The softening section heats only the specific region where powder application is desired, making that area more receptive to powder while keeping other areas at lower temperature. This allows selective decoration without requiring selective foil application, resolving the contradiction between ease of operation and controlled decoration area.
2Manufacturing precision
If the softening section has the same width as the maximum image width, then the entire image can be softened, but precise decoration of a narrower region becomes difficult
Solution Approach 1:
The patent segments the softening function by dividing the softening section into multiple independent heating units arranged in the width direction. Each heating unit can be controlled separately to soften only specific regions. This segmentation allows precise control of the decorated region width without requiring a complex overall system, as each segment can be independently activated based on the desired decoration pattern.
Solution Approach 2:
The patent implements dynamics by making the softening section adjustable in width, allowing it to be configured to match the desired decoration region rather than being fixed to the maximum image width. This dynamic adjustment capability enables precise decoration control while simplifying the system compared to using the entire image width for softening.
3Ease of manufacture
If heating and pressuring is applied to the entire image, then the toner image is fully decorated, but wrinkles may occur on the foil body and unwanted decoration occurs
Solution Approach 1:
The patent applies local quality by concentrating heating and pressuring only in the desired decoration region. The softening section creates a localized temperature increase that makes only the target area receptive to powder application. This localized approach prevents wrinkles on the foil body (since only the target area is heated) and avoids unwanted decoration in other regions, while maintaining process simplicity through the use of a targeted softening mechanism.
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
Enables precise decoration of a narrower region than the maximum image width, preventing unwanted decoration and allowing for adjustable decorated areas by varying the softening section's position and width.
Implementation Method 1
a softener that softens the image
Implementation Method 2
the applied powder adheres to a range that is narrower in a width direction
Data Source
AI summary
An image forming apparatus includes a conveyer that conveys a recording medium supporting an image; a softener that softens the image; and a powder applicator that applies powder to the surface of the softened image, in which the applied powder adheres to a range that is narrower in a width direction orthogonal to a conveyance direction of the recording medium conveyed by the conveyer than a maximum width of the image to be supported by the recording medium.