Recording Apparatus Bending Member Curling Control
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Solution Overview
Problem
Ink jet type recording apparatuses face issues with curling of recording media during high-speed printing, leading to deterioration of recording surfaces and decreased quality due to ink not being fixed, and insufficient flexibility in both transport and width directions, resulting in jamming and improper mounting.
Innovation Solution
A recording apparatus with a first bending member that displaces side portions of the recording medium relative to the central portion upstream of the discharge section, creating a three-dimensional contact structure with discharge rollers and deformation members to bend the recording medium, ensuring the recording surface is inside, thereby enhancing flexibility and preventing curling in both transport and width directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If recording speed is increased, then productivity is improved, but curling of recording medium becomes more significant and recording quality deteriorates
Solution Approach 1:
The patent applies preliminary action by bending the recording medium before it reaches the discharge section. The bending members create a predetermined bending shape that prevents curling from occurring after discharge. This advance preparation ensures that even at high recording speeds, the medium maintains proper flatness for quality recording throughout the process.
2Ease of operation
If discharge roller diameter is reduced to improve flexibility, then ease of operation is improved, but manufacturing precision deteriorates due to insufficient bending control
Solution Approach 1:
The patent segments the bending function into multiple independent bending members positioned at different locations along the transport path. Each bending member contributes to creating the overall bending shape, providing precise control over the medium's curvature. This segmentation allows the system to achieve both flexibility and manufacturing precision that a single discharge roller cannot provide.
Solution Approach 2:
The patent introduces bending control in the width direction (perpendicular to transport direction) as an additional dimension of control. By displacing side portions relative to the central portion, the system creates a three-dimensional bending shape that enhances flexibility without compromising the precision of the bending control in the transport direction.
3Ease of operation
If recording medium is transported in contact with recording surface, then ease of operation is improved, but harmful factors increase due to ink contamination and unfixed recording contents
Solution Approach 1:
The patent applies preliminary action by creating a bending shape that lifts the tip end side of the recording medium away from the recording surface before contact can occur. This advance geometric modification ensures non-contact transport, preventing ink contamination and protection of unfixed recording contents while maintaining simple transport operation.
4Productivity
If discharge roller friction coefficient is increased to improve transporting force, then productivity is improved, but manufacturing precision deteriorates due to excessive bending and jamming
Solution Approach 1:
The patent segments the transporting function across multiple rollers with different friction coefficients. The first discharge roller has a higher friction coefficient for strong transporting force, while the second discharge roller has a lower friction coefficient to prevent excessive bending. This segmentation allows the system to achieve both high productivity through strong transport and manufacturing precision through controlled bending.
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 effectively suppresses curling in both transport and width directions, reducing jamming and ensuring proper mounting of the recording medium, while maintaining the bending shape to prevent curling and enhance recording quality.
Implementation Method 1
the coefficient of friction of a surface of the discharge roller that is positioned in the central portion is set to be larger than the coefficient of friction of a surface of the discharge roller that is positioned on an end section side
Data Source
AI summary
A recording apparatus includes a recording unit that performs recording on a recording surface of a recording medium, a discharge section that discharges the recording medium, and a first bending member that is in contact with the recording medium which passes through the recording unit in the transport path and is transported toward the discharge section to bend the recording medium, in which the first bending member bends the recording medium in such a manner that the recording surface is directed inside by displacing both side portions of the recording medium in a width direction with respect to a central portion of the recording medium in the width direction of the recording medium at a position on a further upstream side in a direction of the transport than a contact position of the discharge section where a feeding force is applied to the recording medium.