Transparent Toner Selection for Gloss Uniformity on Uneven Media
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Solution Overview
Problem
Conventional image forming devices using electrophotographic recording systems struggle to achieve desired gloss on printed images due to uneven toner adherence caused by varying surface qualities of recording mediums, limiting the types of paper that can be used.
Innovation Solution
An image forming device with multiple development units, including a first unit for color toners and a second unit for transparent toners of varying particle sizes, which selects the appropriate toner based on the recording medium's surface characteristics to form a base or overlay image, ensuring uniform toner adherence and gloss across different mediums.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If transparent toner is added to achieve uniform total toner adherence amount, then the toner adherence uniformity is improved, but the surface gloss uniformity deteriorates due to recording medium surface unevenness
Solution Approach 1:
The patent applies local quality by using transparent toner specifically for the base layer on recording mediums with uneven surfaces, while using opaque toner for the overlay layer. This localized application of transparent toner compensates for surface unevenness in specific areas without affecting the overall image quality, resolving the contradiction between uniform toner adherence and uniform surface gloss.
Solution Approach 2:
The patent segments the toner application into two distinct layers: a base layer using transparent toner to address surface unevenness, and an overlay layer using opaque toner for image formation. This segmentation allows each layer to perform its specific function independently, maintaining both toner adherence uniformity and surface gloss uniformity.
2Shape
If transparent toner is used to compensate for recording medium surface unevenness, then the surface gloss is improved, but the device complexity increases due to multiple development units
Solution Approach 1:
The patent implements multi-functionality by designing a single image forming device with multiple development units that can selectively apply either transparent or opaque toner based on the recording medium type and image requirements. This universal design allows the device to handle various recording mediums and application scenarios without requiring separate devices, managing complexity through integrated versatility.
Solution Approach 2:
The patent applies dynamics by enabling the system to adaptively select between transparent and opaque toners based on real-time detection of recording medium surface characteristics. This dynamic adjustment allows the device to optimize surface gloss for different mediums while maintaining a manageable structure through programmable control rather than fixed hardware complexity.
3Adaptability or versatility
If multiple transparent toners with different particle sizes are used, then the adaptability to different recording mediums is improved, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the particle size of transparent toners to match different recording medium surface characteristics. Instead of using fundamentally different developers, the system adjusts the physical parameter (particle size) of the same toner type to achieve adaptability across different mediums, reducing device complexity while maintaining versatility.
Solution Approach 2:
The patent uses local quality by selecting specific transparent toner particle sizes for specific recording medium types. Each developer is optimized for a particular medium characteristic, allowing the system to maintain simplicity through targeted specialization rather than requiring a complex universal solution for all medium types.
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 solution enables consistent achievement of desired gloss on printed images regardless of the type of recording medium used, by selecting the appropriate transparent toner based on the medium's surface characteristics, thus overcoming the limitations of conventional systems.
Implementation Method 1
an electrostatic latent image is formed on a photoreceptor drum; toner is adhered to the photoreceptor drum; the toner is transferred to the recording medium
Implementation Method 2
transparent toner is used. Toner adherence amount is calculated based on the density of a manuscript. And then, the transparent toner is added so as to make certain that the total toner adherence amount is a certain value or more
Data Source
AI summary
An image forming device includes a first development unit configured to form a first image on a recording medium with a first developer, a second development unit configured to form a second image on the recording medium with at least one of a plurality of second developers that are different from the first developer, and a print control unit configured to select the at least one of the plurality of second developers for forming the second image. The second developers are transparent developers, and the second image is a transparent image.