Preheating Device for Inkjet Recording Medium
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Solution Overview
Problem
Ink jet printers face printing defects due to thermal extension and wrinkling of the recording medium caused by rapid temperature increases during preheating, which existing preheating devices fail to prevent effectively.
Innovation Solution
A recording apparatus with a preheating device that gradually increases heat application to the recording medium as it moves toward the downstream side, using a configuration of heating sources with decreasing gaps or bending portions to maintain a smooth temperature increase, preventing rapid thermal expansion and wrinkling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a preheating device rapidly increases the temperature of the recording medium, then the ink can be prevented from agglomeration and permeation, but wrinkles are caused due to thermal extension of the recording medium
Solution Approach 1:
The preheating device is divided into multiple heating sections (first, second, and third heating sections) with different heating capacities arranged in sequence along the transporting path. This segmentation allows gradual temperature increase rather than sudden heating, preventing thermal extension wrinkles while still achieving the necessary preheating effect for ink quality.
Solution Approach 2:
The heating capacity of each section is dynamically designed to match the recording medium's temperature requirements at different positions. The first heating section provides gentle initial heating, the second section provides moderate heating, and the third section provides strong heating close to the recording head, creating a dynamic temperature gradient that prevents wrinkles while ensuring printing quality.
2Stability of the object's composition
If the temperature of the recording medium is rapidly increased by preheating, then ink agglomeration and permeation are prevented, but thermal extension causes printing defects
Solution Approach 1:
The preheating device is divided into multiple heating sections (first, second, and third heating sections) with different heating capacities arranged in sequence along the transporting path. This segmentation allows gradual temperature increase rather than sudden heating, preventing thermal extension wrinkles while still achieving the necessary preheating effect for ink quality.
Solution Approach 2:
The heating capacity of each section is dynamically designed to match the recording medium's temperature requirements at different positions. The first heating section provides gentle initial heating, the second section provides moderate heating, and the third section provides strong heating close to the recording head, creating a dynamic temperature gradient that prevents wrinkles while ensuring printing quality.
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 configuration allows for high-quality printing by preventing wrinkles and thermal damage, ensuring the recording medium is preheated smoothly and efficiently, reducing the need for separate temperature control devices and lowering costs.
Implementation Method 1
a preheating device that preheats the recording medium to the upstream side of the recording head in the transporting direction of the recording medium
Implementation Method 2
printing defects may be caused by wrinkles due to thermal extension of the recording medium
Data Source
AI summary
A recording apparatus includes a recording head that ejects liquid onto a recording medium, a transporting device that transports the recording medium along a supporting surface of a supporting member, and a preheating device that preheats the recording medium to the upstream side of the recording head in a transporting direction of the recording medium. The preheating device includes a preheating unit that increases the amount of heat per unit time which is applied to the recording medium as the recording medium is moved toward the downstream side in the transporting direction. The supporting member includes the supporting surface and bending portions.