Multi-Stage Pressing for Ink Jet Image Fixation
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Solution Overview
Problem
Ink jet recording techniques face challenges in efficiently absorbing liquid components from images on recording media without causing adhesion of coloring materials to porous bodies, leading to insufficient image fixation and potential deformation or crushing of images under high pressure.
Innovation Solution
An ink jet recording method and apparatus utilizing a multi-stage pressing process with different pressure levels applied by a porous body to absorb liquid components from an image, reducing adhesion and enhancing image fixation while maintaining high image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a porous body is pressed against an image under high pressure to absorb liquid components, then the absorption amount is increased, but the coloring material adheres to the porous body and the image deforms or crushes
Solution Approach 1:
The pressing process is divided into multiple stages with different pressure levels. A first pressing unit applies a first pressure, and a second pressing unit applies a second pressure that is higher than the first pressure. This segmentation allows the system to achieve both sufficient liquid absorption and prevent coloring material adhesion by using progressively increasing pressure in controlled stages.
Solution Approach 2:
The pressing pressure is made dynamic rather than static. The system transitions from a lower pressure state to a higher pressure state through multiple pressing units, allowing the pressing force to adapt to the different requirements of liquid absorption and image protection at different stages of the process.
2Quantity of substance
If only capillary pressure of a porous body is used to absorb liquid components, then the structure is simple, but the absorption amount is insufficient when liquid component content is large
Solution Approach 1:
The system introduces dynamic pressure control with multiple pressing units that apply different pressure levels. This transforms the static capillary pressure system into a dynamic system where pressure can be adjusted and increased in stages, enabling sufficient liquid absorption without excessive device complexity.
Solution Approach 2:
The pressing pressure parameter is changed and optimized through multiple stages. The first pressing unit applies a first pressure, and the second pressing unit applies a higher second pressure. This parameter change allows the system to overcome the limitations of simple capillary pressure while maintaining reasonable device complexity.
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 method effectively absorbs liquid components, reducing coloring material adhesion and ensuring high image quality by using a combination of pressures in the multi-stage pressing process, allowing for efficient liquid absorption without deforming the image.
Implementation Method 1
a capillary pressure of the porous body plays an important role in intake of the liquid components into the porous body
Data Source
AI summary
An ink jet recording apparatus includes an image forming unit configured to form an image containing a liquid and a coloring material on an ink receiving medium; a liquid absorbing member including a porous body that comes into contact with the image, the porous body being configured to absorb at least a part of the liquid from the image; and a plurality of pressure applying units configured to press the image on the ink receiving medium by the porous body. The plurality of pressure applying units include a first pressure applying unit configured to press the image at a first pressure and a second pressure applying unit configured to press the image having been pressed by the first pressure applying unit at a second pressure higher than the first pressure.