Ink Container Version Detection to Prevent Mixed-Formula Discharge

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Solution Overview

Problem

Existing liquid discharge apparatuses do not prevent the use of multiple liquid containers containing liquids with the same color but different versions from being used in a mixed manner, which can lead to apparatus failures or image defects due to chemical reactions or ink aggregation.

Innovation Solution

The apparatus includes multiple insertion ports for liquid containers, an acquisition unit to identify container versions, and a display to prompt the exchange of containers with different versions, ensuring identical color containers use compatible versions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If multiple liquid containers containing liquids of identical color but different versions are allowed to be used in a mixed manner, then the device complexity is reduced and ease of operation is improved, but apparatus failures or image defects may occur due to chemical reactions or ink aggregation

Engineering Contradiction:
Improveease of operationVSAvoidreliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The control unit acquires version information from each liquid container and provides feedback to the display unit to prompt users when containers of different versions are detected. This feedback mechanism maintains ease of operation by allowing mixed use while preventing reliability issues through user awareness and corrective action.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system performs preliminary detection of liquid container versions before actual use, acquiring version information and comparing it across containers. This preliminary action prevents potential failures by identifying version mismatches before they cause chemical reactions or image defects.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If version detection and comparison functions are added to the liquid discharge apparatus, then reliability is improved by preventing mixed use of different versions, but device complexity increases

Engineering Contradiction:
ImprovereliabilityVSAvoiddevice complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The liquid containers themselves carry version information that can be automatically read by the acquisition unit. The system serves itself by having the containers provide their own identification data, reducing the need for complex manual verification processes while maintaining reliability.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces potential mechanical or manual version verification methods with an automated information acquisition system that reads version data from the liquid containers. This substitution reduces device complexity by using electronic information exchange rather than complex mechanical verification mechanisms.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Manufacturing precision

If information acquisition and comparison mechanisms are implemented, then manufacturing precision is improved by ensuring consistent liquid versions, but loss of information increases due to additional sensors and processing requirements

Engineering Contradiction:
Improvemanufacturing precisionVSAvoidloss of information
Core Design Contradiction:
Manufacturing precisionVSLoss of information

Solution Approach 1:

The version information is extracted from the liquid containers themselves and read by the acquisition unit, rather than requiring the system to continuously monitor and process all liquid properties. This extraction approach maintains manufacturing precision while minimizing information loss by focusing only on the critical version identifier.

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentEP4385742B1Liquid discharge apparatus, liquid exchange method, and program
Publication Date: 2025.11.26 RICOH CO LTD
  • EP4385742B1 patent drawingFigure 1
  • EP4385742B1 patent drawingFigure 2
  • EP4385742B1 patent drawingFigure 3

AI summary

A liquid discharge apparatus includes: a discharge unit (34) to discharge a liquid; multiple liquid containers (10) to contain the liquid having an identical color to each other; multiple insertion ports (4) to which the multiple liquid containers (10) are respectively detachably attachable; an acquisition unit (314, 300) to acquire information of the multiple liquid containers (10) attached to the multiple insertion ports (4); a display (5); and circuitry (5) configured to: in response to an acquisition of the information of the multiple liquid containers (10) containing the liquid of identical color of different versions by the acquisition unit (314, 300), cause the display (5) to display information prompting an exchange of a liquid container (10) containing the different versions to a liquid container (10) containing the liquid having an identical color of an identical version to other of the multiple liquid containers (10).