Segmented Radiative Drying for Media Temperature Control
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Solution Overview
Problem
Existing printing systems face issues with image quality, lifespan of downstream components, and throughput due to overheating and power consumption when heating media both upstream and downstream of the printing station, which distorts media and delays printing.
Innovation Solution
A drying apparatus with a housing containing a first and second set of radiative heating elements and an air handling device that strategically heats and cools media, using radiative heating elements in both the front and rear regions and high-velocity air jets in the rear region to control media temperature and enhance drying efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If media is heated upstream of the printing station, then drying efficiency is improved, but media distortion occurs and image quality deteriorates
Solution Approach 1:
The heating system is segmented into multiple independent heating zones (first heating zone, second heating zone, third heating zone) with different temperature controls. The first heating zone heats to a lower temperature (50-70°C) to prevent distortion, while the second and third zones heat to higher temperatures (70-90°C) for efficient drying, allowing each zone to perform its specific function without compromising image quality
Solution Approach 2:
Different regions of the media are subjected to different temperature treatments simultaneously. The leading edge and body of the media receive lower temperature heating to prevent distortion, while the trailing edge receives higher temperature heating for efficient drying. This local differentiation resolves the contradiction between drying efficiency and image quality
2Productivity
If media is heated to target temperature quickly, then throughput is improved, but power consumption increases and downstream components overheat
Solution Approach 1:
The first heating zone performs preliminary heating of the media to a moderate temperature (50-70°C) before the media enters the main drying zones. This preliminary action reduces the temperature differential in subsequent zones, allowing faster overall drying with lower peak power consumption and preventing downstream component overheating
Solution Approach 2:
The heating elements operate in a staged, periodic manner rather than all-at-once. The first heating zone operates continuously at lower power, while the second and third zones are activated in sequence based on media position and drying requirements, optimizing power consumption while maintaining high throughput
3Productivity
If heating elements are disposed upstream of printing station, then drying efficiency is improved, but media distortion occurs
Solution Approach 1:
The upstream heating area is segmented into a first heating zone with lower temperature (50-70°C) positioned before the printing station, and second/third heating zones with higher temperature (70-90°C) positioned after the printing station. This segmentation allows the media to be heated efficiently without distortion at the critical printing area
Solution Approach 2:
The heating system applies different temperature qualities to different spatial locations of the media. The region passing through the printing station experiences gentle heating (50-70°C) that maintains media stability, while other regions experience intense heating (70-90°C) for efficient drying, resolving the contradiction between drying efficiency and media stability
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 solution improves image quality and extends the lifespan of downstream components while reducing power consumption and increasing throughput by efficiently ramping up to target temperatures and maintaining optimal media temperatures.
Implementation Method 1
a first set of radiative heating elements disposed within the front region to heat the media, a second set of radiative heating elements disposed within the rear region to heat the media
Implementation Method 2
an air handling device disposed across from the second set of radiative heating elements to jet air within the rear region to cool the media prior to passing the media through the outlet
Data Source
AI summary
A drying apparatus usable with a printing system includes a housing, a first set of radiative heating elements, a second set of radiative heating elements, and an air handling device. The housing includes a front region and a rear region adjacent to the front region. The front region includes an inlet to receive media. The rear region includes an outlet to pass media there through. The first set of radiative heating elements is disposed within the front region to heat the media. The second set of radiative heating elements is disposed within the rear region to heat the media. The air handling device is disposed across from the second set of radiative heating elements to jet air within the rear region to cool the media prior to the media being passed through the outlet.