Dynamic Suction Control for Roll Paper Curling in Inkjet Printers
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Solution Overview
Problem
Inkjet printers face challenges in holding and conveying roll paper smoothly due to curling issues, which can reduce the conveying force and affect printing quality.
Innovation Solution
A recording device with a medium-supporting part featuring suction holes, where the suction force is adjusted between a first and second suction force to maintain paper flatness and facilitate smooth conveyance, with a control system managing the suction force to optimize paper alignment and reduce wrinkles during printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction part sucks outside air via the suction hole with strong suction force, then the roll paper can be held firmly on the platen, but the conveying force is reduced
Solution Approach 1:
The suction force is dynamically adjusted between a first suction force during conveying and a second suction force during printing. The switching between different suction force levels enables the system to adapt to different operational requirements, maintaining paper stability during printing while ensuring smooth conveying during transport.
Solution Approach 2:
The suction force parameter is changed between two distinct levels: a stronger second suction force for holding the paper during printing, and a weaker first suction force for conveying the paper. This parameter switching resolves the contradiction by optimizing the suction force for each specific operational phase.
2Shape
If the suction force is increased to prevent paper curling, then paper flatness is improved, but the paper conveying smoothness deteriorates
Solution Approach 1:
The suction force is applied periodically in two distinct phases: a first suction force during conveying to maintain basic paper contact, and a second suction force during printing to ensure paper flatness. This periodic switching between suction force levels allows the paper to be conveyed smoothly while preventing curling during the printing phase.
Solution Approach 2:
The suction force transitions dynamically between two states: a weaker state during conveying that allows smooth paper movement, and a stronger state during printing that ensures paper flatness. This dynamic adjustment resolves the contradiction between maintaining paper shape and ensuring conveying smoothness.
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
The solution ensures high-quality printing by maintaining paper flatness and enabling smooth conveyance, reducing the risk of curling and improving the overall printing process efficiency.
Implementation Method 1
The suction part is connected to the medium-supporting part to suck outside air via the suction hole
Data Source
AI summary
A recording device includes a medium-supporting part having a suction hole, a recording head and a suction part. The recording head is configured and arranged to perform a liquid ejection onto a medium supported on the medium-supporting part. The suction part is connected to the medium-supporting part to suck outside air via the suction hole. A liquid ejection period in which the recording head performs the liquid ejection onto the medium has a first period in which the suction part sucks by a predetermined suction force, and a second period in which the suction part sucks by a suction force which is smaller than the predetermine suction force after the first period.