Inkjet Recording Head Height Adjustment for Variable-Thickness Media

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Solution Overview

Problem

Inkjet recording apparatuses face issues with image quality degradation when printing on thick recording media due to variations in the distance between the recording head nozzles and the medium surface, leading to ink droplet misalignment and potential contact, which degrades image clarity and quality.

Innovation Solution

The apparatus incorporates a raising/lowering mechanism to adjust the relative position of the recording head based on calculated intervals of a test pattern, ensuring an optimal distance is maintained regardless of the thickness of the recording medium.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the recording head is positioned close to thick recording media to ensure ink contact, then ink transfer efficiency is improved, but the nozzle surface may come into contact with the medium surface causing image quality degradation

Engineering Contradiction:

Improveink transfer efficiencyVSAvoidimage quality

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent implements dynamic adjustment of the recording head position through a raising/lowering mechanism that automatically changes the distance between the nozzle surface and the recording medium based on the medium thickness, allowing the system to optimize for both ink transfer efficiency and prevent contact-induced image degradation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses an imaging portion to capture images of test patterns printed on the recording medium, calculates the interval between the test pattern and reference position, and uses this feedback to determine and adjust the head height, creating a closed-loop control system that maintains optimal printing conditions

Inventive Principle:

Principle #23Feedback

2Device complexity

If the recording head position is fixed, then device complexity is reduced, but image quality degrades when printing on media of varying thickness

Engineering Contradiction:

Improverecording head positioning systemVSAvoidimage quality consistency

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The system performs self-adjustment by automatically printing test patterns, capturing images, calculating intervals, determining head height, and adjusting the recording head position without external intervention, making the complexity management autonomous

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system prints a test pattern before actual image recording to measure the interval and determine the appropriate head height, performing preliminary adjustments to ensure optimal conditions for subsequent printing operations

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12384178B2Inkjet recording apparatus and head position determining method

Publication Date: 2025.08.12 KYOCERA DOCUMENT SOLUTIONS INC

AI summary

An inkjet recording apparatus captures an image of a recording surface of a recording medium including a test pattern recorded on the recording surface, calculates an interval between the test pattern and a reference position on the recording surface based on the image of the recording surface, and determines a height position of the recording head according to the recording medium based on the interval. The inkjet recording apparatus outputs information related to the determined height position.