Froth Coalescing Device for Ink Reservoir Sensor Accuracy
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Solution Overview
Problem
Froth formation in fluid systems, such as ink printing systems, leads to inaccurate sensor readings and inefficient ink usage due to premature triggering of out-of-ink sensors and reduced system performance.
Innovation Solution
A continuous defrothing device with an inner chamber featuring a filter screen and bubble-breaking features that separate froth into coalesced fluid and air, allowing the fluid to be re-circulated and air to be vented, improving sensor accuracy and system efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If air is introduced into the ink reservoir to maintain pressure, then pressure is maintained, but froth forms in the ink which inhibits system operation
Solution Approach 1:
The patent extracts the harmful froth from the ink reservoir by introducing a defrothing device that separates and removes froth from the ink, allowing the ink to be collected and re-circulated while venting the air and froth separately
Solution Approach 2:
The patent introduces a defrothing device as an intermediary component between the ink reservoir and the printing system, which mediates the interaction between air and ink by breaking up froth bubbles and separating the phases before the ink enters the printing system
2Quantity of substance
If froth accumulates in the ink reservoir, then fluid volume increases, but sensor readings become inaccurate
Solution Approach 1:
The patent implements continuous defrothing action through a continuously operating defrothing device that constantly breaks up froth bubbles and separates ink from air, ensuring that the ink level sensors always read accurately without froth interference
Solution Approach 2:
The patent removes froth from the ink reservoir continuously, extracting the harmful bubbles before they can accumulate to levels that would interfere with sensor readings, thereby maintaining measurement precision
3Measurement precision
If froth is present in the ink supply, then ink level appears lower than actual, but this leads to premature replacement
Solution Approach 1:
The patent maintains continuous separation of froth from ink through ongoing defrothing action, ensuring that ink level sensors continuously read accurately and prevent premature replacement decisions based on false low-level readings
Solution Approach 2:
The patent converts the harmful effect of froth (which causes false low readings) into a beneficial process by using the defrothing device to break up bubbles and separate phases, thereby enabling accurate measurement and preventing ink waste
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 continuous coalescing of froth into coalesced fluid and air enhances sensor accuracy, increases customer satisfaction, and improves fluid efficiency by preventing premature ink depletion and system failures.
Implementation Method 1
an inner chamber into which froth may be directed and an outer chamber for receiving the coalesced fluid. The inner chamber is defined at least in part by a filter screen mounted on a recessed rim within the frame
Implementation Method 2
The inner chamber includes features that restrict the flow of bubbles, allowing more time for them to combine into larger bubbles that are weaker and for breaking the bubbles in the froth
Implementation Method 3
As the bubbles are broken, the coalesced fluid passes through the filter screen and into the outer chamber
Data Source
AI summary
An example device includes a frame having at least one outer opening and at least one inner opening recessed from the outer opening, at least one filter screen mounted on a perimeter of the at least one inner opening to form an inner chamber, at least one cover layer mounted on a perimeter of the at least one outer chamber to form an outer chamber, and a series of bubblebreaking features positioned within the inner chamber. The bubble-breaking features are positioned along a depth and a height of the inner chamber. The filter screen separates the inner chamber from the outer chamber, and the filter screen prevents froth from crossing and allows coalesced fluid to cross into the outer chamber.