Inkjet Recording Head Support Member for Marginless Printing
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Solution Overview
Problem
In ink jet printers, the alignment of the paper is not stabilized due to the free floating of paper end portions, leading to distorted deformation and degraded printing quality, especially when the distance between transport rollers and the recording region is increased to accommodate a support surface and a recess for marginless recording.
Innovation Solution
A recording apparatus with a support member that includes a deposit recess for receiving deviated ink droplets and a support region upstream of the deposit recess, where the nozzles on the recording head extend up to the upstream end of the deposit recess but the most upstream nozzle is not used in marginless recording, allowing the deposit recess to be shorter and the support region to be positioned closer to the transport rollers, thereby stabilizing the paper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between transport rollers and the recording region is increased to accommodate a support surface and deposit recess, then the paper can be supported upstream and deviated ink droplets can be received, but the paper alignment becomes unstable and recording quality degrades
Solution Approach 1:
The patent positions the deposit recess at the end portion of the paper in the width direction (perpendicular dimension) rather than extending it in the transport direction (length dimension). This dimensional shift allows the support region to be located upstream closer to the transport rollers, reducing the distance in the transport direction while still providing both support function and deviated droplet reception capability.
Solution Approach 2:
The deposit recess is specifically located at the end portion of the paper in the width direction, creating a localized function at that specific position. This local placement allows the recess to receive deviated ink droplets without requiring the entire support surface to extend far upstream in the transport direction, thereby reducing the distance between transport rollers and recording region.
2Adaptability or versatility
If the deposit recess is made longer in the transport direction to receive deviated ink droplets, then marginless recording is enabled, but the distance between transport rollers and recording region increases
Solution Approach 1:
The patent shifts the deposit recess placement from the transport direction (length dimension) to the width direction (perpendicular dimension) at the paper's end portion. This allows marginless recording capability to be achieved without extending the deposit recess length in the transport direction, thereby keeping the distance between transport rollers and recording region short.
Solution Approach 2:
The deposit recess is positioned locally at the end portion of the paper in the width direction, creating a focused reception area for deviated ink droplets. This localized approach enables marginless recording without requiring a long deposit recess extending upstream in the transport direction.
3Area of stationary object
If the distance between transport rollers and recording region is reduced to maintain paper alignment, then the recordable region increases, but there is insufficient space to provide a support surface and receive deviated ink droplets
Solution Approach 1:
The patent places the deposit recess at the paper's end portion in the width direction rather than extending it in the transport direction. This dimensional repositioning allows the recordable region in the transport direction to be maximized while still providing space for both the support surface and deviated droplet reception capability.
Solution Approach 2:
The deposit recess is positioned at the specific location of the paper's end portion in the width direction, creating a localized function that does not encroach on the recordable region in the transport direction. This allows full utilization of the recordable area while maintaining support and droplet reception functions.
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 reduces the distance between transport rollers and the recording region, stabilizes the paper alignment, and prevents ink droplet deviation, enhancing printing quality by ensuring the paper remains flat and aligned during the recording process.
Implementation Method 1
a suction mechanism that attracts the paper, and the support member includes a suction recess that communicates with the suction mechanism
Implementation Method 2
an adsorption recess for adsorbing the paper
Data Source
AI summary
A recording apparatus includes a recording head that ejects a liquid thereby performing recording on a recording medium, and a support member disposed so as to oppose the recording head. The support member includes a deposit recess located at a position corresponding to the respective end portion of the recording medium in the width direction intersecting with the transport direction, for receiving the liquid ejected to a region deviated from the recording medium in a marginless recording process, and a support region provided upstream of the deposit recess in the transport direction so as to support a back surface of the recording medium, and most upstream nozzles in the transport direction are not used in the marginless recording process.