Printer Cartridge Recycling via Electrical and Nozzle Evaluation
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Solution Overview
Problem
Existing methods for determining the recyclability of printer cartridges lack accuracy in assessing internal issues, leading to potential recycling of cartridges with hidden defects.
Innovation Solution
A method involving electrical evaluation of the printing element substrate and outer appearance evaluation of the cartridge, including inspection of ejection ports, to determine recyclability based on electrical and outer appearance criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only visual check is performed for recycling determination, then the operation is simple and fast, but the measurement precision of internal problems is insufficient
Solution Approach 1:
The recycling determination process is divided into two independent evaluation modules: electrical evaluation (assessing printing element substrate functionality) and outer appearance evaluation (assessing cartridge physical condition). Each module operates independently and contributes to the final recycling decision, allowing comprehensive assessment without requiring a single complex evaluation system
Solution Approach 2:
An automated evaluation system acts as an intermediary between the cartridge and the recycling decision-making process. This system objectively measures electrical characteristics and outer appearance conditions, providing data-driven inputs that eliminate subjective judgment and improve determination accuracy
2Measurement precision
If electrical evaluation and outer appearance evaluation are both performed, then the determination accuracy is improved, but the productivity decreases due to additional evaluation steps
Solution Approach 1:
Electrical evaluation and outer appearance evaluation are conducted before the recycling determination decision is made. By performing these evaluations in advance, all necessary data is collected upfront, enabling a quick and accurate final decision without requiring additional time-consuming analysis steps later in the process
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
Enhances the accuracy of determining recyclability by identifying internal and external issues, reducing waste, and extending the usable life of cartridges through targeted ink filling based on their condition.
Implementation Method 1
a plurality of printing elements configured to generate energy to eject the ink according to an electric signal
Implementation Method 2
a plurality of printing elements configured to generate energy to eject the ink according to an electric signal
Data Source
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AI summary
An object of the present disclosure is to provide a recycling method of a cartridge (120) that has the potential to contribute to the achievement of a sustainable society, such as a decarbonized society/circular society. The recycling method of the cartridge (120) includes: performing electrical evaluation to evaluate an electrical characteristic of a printing element substrate (123) by supplying electric power to the printing element substrate (123) from a wiring substrate; performing outer appearance evaluation to evaluate an outer appearance of the cartridge (120) based on the number of ejection ports (301) having a problem out of multiple ejection ports (301); and determining whether to recycle the cartridge (120) based on a result of the electrical evaluation and a result of the outer appearance evaluation.