Inkjet Apparatus Negative Pressure Dust Removal
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Solution Overview
Problem
Inkjet recording apparatuses face challenges in effectively preventing nozzle clogging due to paper dust accumulation, which existing paper dust removal techniques do not adequately address.
Innovation Solution
The apparatus incorporates a recording head, a conveyance section, a gap forming section, and a negative pressure applying section, where a narrow gap is created between the plate member and the conveyor belt, allowing high-velocity air flow to remove paper dust, and shield plates are used to obstruct lateral air flow, enhancing dust removal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a paper dust collector with vertical walls is used to collect paper dust, then paper dust attachment to the recording head is reduced, but the device complexity increases and the effectiveness against nozzle clogging is insufficient
Solution Approach 1:
The invention extracts the harmful paper dust from the system by introducing a negative pressure generating section that creates a suction force, actively drawing paper dust away from the recording head area through a dedicated dust collecting section, thereby preventing nozzle clogging without requiring complex mechanical collectors
Solution Approach 2:
The invention applies pneumatic principles by using a negative pressure generating section to create a controlled airflow field that sweeps paper dust away from the recording head. The negative pressure atmosphere actively transports dust particles through air flow, providing an effective and relatively simple mechanism for preventing nozzle clogging
2Productivity
If the narrow gap distance is decreased to increase air flow velocity, then paper dust removal efficiency is improved, but the risk of recording medium attachment to the conveyor belt increases
Solution Approach 1:
The invention applies local quality by creating a narrow gap only in the dust collecting section where high-velocity air flow is needed for dust removal, while maintaining normal gap dimensions in other areas. This localized approach allows high productivity in dust removal without causing unwanted attachment of the recording medium elsewhere
Solution Approach 2:
The invention changes the gap distance parameter dynamically by making it adjustable, allowing optimization of the balance between air flow velocity (for dust removal efficiency) and recording medium attachment risk. The adjustable gap enables adaptation to different operating conditions
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 configuration effectively removes paper dust from the recording medium, reducing the likelihood of nozzle clogging and improving the reliability of the inkjet recording process.
Implementation Method 1
The negative pressure applying section applies negative pressure to the narrow gap
Implementation Method 2
air flowing into the narrow gap from surrounding space
Data Source
AI summary
An inkjet recording apparatus includes a recording head, a conveyance section, a plate member, and a negative pressure applying section. The recording head ejects ink onto a recording medium. The conveyance section conveys the recording medium to a position of image forming by the recording head and has a conveying surface on which the recording medium is to be placed. The plate member is located upstream of the recording head in a conveyance direction of the recording medium to form a narrow gap with the conveying surface of the conveyance section. The negative pressure applying section applies negative pressure to the narrow gap. A distance across the narrow gap in a direction perpendicular to the conveying surface is set so as to allow air flowing into the narrow gap from surrounding space to have a higher flow velocity in the narrow gap than before flowing into the narrow gap.