Vapor Control Heater for Inkjet Printer Condensation
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Solution Overview
Problem
Inkjet printers using water-based and low volatility inks face issues with nozzle clogging and print quality due to moisture condensation in cooler environments, leading to fog formation, especially at high print volumes.
Innovation Solution
An air heating system incorporating a print zone heater and a vapor control heater is implemented to maintain optimal print zone temperature and prevent condensation by introducing heated air into the moisture-laden air stream, comprising heating elements and fans to distribute warm air efficiently across the print zone and downstream from the printer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water-based and low volatility inks are used to prevent nozzle clogging, then nozzle reliability is improved, but moisture condensation occurs in cooler environments causing fog formation
Solution Approach 1:
The patent changes the temperature parameter of the air in the print zone by introducing a heating system. The heater raises the air temperature above the dew point, preventing moisture condensation while maintaining the use of water-based inks for nozzle reliability
Solution Approach 2:
The patent introduces heated air as an intermediary substance between the inkjet printing system and the cooler external environment. This heated air acts as a thermal buffer that prevents condensation without requiring changes to the ink formulation or printhead design
2Productivity
If blow driers are used to quickly evaporate moisture, then drying speed is improved, but condensation in the discharged air stream increases fog formation
Solution Approach 1:
The patent converts the harmful condensation in the discharged air into a beneficial effect by heating the air stream. The same moisture-laden air that causes fog is now heated to prevent condensation, turning the problematic condensation-prone air stream into a controlled environment that prevents fog formation both inside and outside the printer
3Use of energy by stationary object
If the print zone temperature is lowered to match cooler operating environments, then energy consumption is reduced, but print quality deteriorates due to condensation
Solution Approach 1:
The patent dynamically adjusts the temperature parameter of the print zone air using controlled heating. Instead of maintaining a fixed low temperature, the system raises the air temperature above the dew point to prevent condensation, ensuring consistent print quality across different operating environments
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 system effectively prevents condensation, improving print quality and reducing fog formation, allowing for consistent performance in cooler environments by maintaining a stable print zone temperature and controlling vapor condensation.
Implementation Method 1
A vapor control heater has been developed to introduce warm air into the moisture laden air leaving the printer
Implementation Method 2
The examples shown in the figures and described herein illustrate but do not limit the disclosure
Implementation Method 3
The moisture in the hot air flowing out of the printer downstream from the dryer may condense into vapor that can produce a noticeable fog
Data Source
AI summary
In one example, a vapor control heater for a printer includes a housing, a heating element at least partially enclosed by the housing, and a fan to move air over the heating element and into a flow of air from the printer dryer.