Printer Sensor Assembly for Ink Level Monitoring via Pressure Differential
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Solution Overview
Problem
Ink cartridges with embedded sensors for monitoring ink levels are costly and contribute to a higher carbon footprint due to their disposable nature, as they need to be replaced when empty, and existing printing systems do not efficiently manage ink supply levels without causing damage to the print head.
Innovation Solution
A printer-based sensor assembly that includes a pressure sensor to detect ink levels by measuring the pressure differential between ink and air pressure in the ink channel, eliminating the need for an embedded sensor in the ink cartridge, thereby reducing costs and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an embedded sensor is included in the ink cartridge to determine ink supply levels, then ink level monitoring is achieved, but the cost of the ink cartridge increases and the carbon footprint increases due to disposable replacement
Solution Approach 1:
The sensor is extracted from the disposable ink cartridge and relocated to the reusable printer body. The ink cartridge becomes a simple container without embedded electronics, while the sensor assembly in the printer continuously monitors ink levels by detecting pressure changes in the ink channel, eliminating the need for sensors in each cartridge.
Solution Approach 2:
The sensor assembly in the printer serves multiple functions: it monitors ink levels across all cartridges, detects air bubbles in the ink channel, and provides warnings before the print head is damaged. This centralized sensor system replaces multiple individual sensors that would otherwise be needed in each cartridge.
2Measurement precision
If an embedded sensor is included in the ink cartridge to determine ink supply levels, then ink level monitoring is achieved, but the carbon footprint increases due to frequent disposal and replacement of ink cartridges
Solution Approach 1:
The sensor is extracted from the disposable ink cartridge and relocated to the reusable printer body. The ink cartridge becomes a simple container without embedded electronics, while the sensor assembly in the printer continuously monitors ink levels by detecting pressure changes in the ink channel, eliminating the need for sensors in each cartridge.
Solution Approach 2:
The sensor assembly is retained and reused in the printer body across multiple ink cartridge replacements. Only the ink cartridge is discarded and replaced, while the expensive sensor component is recovered and continues to serve throughout the printer's lifetime, significantly reducing waste.
3Device complexity
If existing printing systems are used without efficient ink supply level management, then system simplicity is maintained, but print head damage occurs
Solution Approach 1:
The sensor assembly detects ink level depletion and air bubble presence before they cause damage to the print head. The system provides advance warnings and can halt operation proactively, preventing catastrophic failures rather than reacting after damage occurs.
Solution Approach 2:
The sensor assembly continuously monitors ink supply conditions and provides real-time feedback to the printer controller. When air bubbles or low ink levels are detected, the system adjusts operation or alerts the user, creating a closed-loop control system that protects the print head while maintaining operational simplicity.
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 allows for precise monitoring of ink levels, reducing waste and costs by extending the life of the printer and minimizing the carbon footprint through the reuse of the sensor assembly, while preventing print head damage by detecting out-of-ink conditions effectively.
Implementation Method 1
A sensor assembly for a printer includes a sensor to identify an ink pressure
Data Source
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AI summary
An example in accordance with an aspect of the present disclosure includes an ink channel of a printer, coupleable to an ink supply to receive an ink. A sensor assembly is mounted to the ink channel, including a sensor in fluid communication with the ink channel to identify an ink level of the ink supply based on a pressure difference between an air pressure, associated with the sensor assembly, and an ink pressure, associated with the ink channel.