Overlap-Feeding Printing Device Ink Landing Control
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Solution Overview
Problem
Consecutive overlap-feeding operations in printing devices often result in decreased printing quality due to differences in surface levels or gaps between overlapping and non-overlapping areas of mediums, with existing technologies failing to address this issue effectively.
Innovation Solution
A printing device with a controller that performs specific processes to control the landing position of liquid and suppress deviations during consecutive overlap-feeding, ensuring the proportion of the printing region to the nozzle row length meets a predetermined value, and adjusting the movement speed and printing direction based on conditions to maintain printing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If consecutive overlap-feeding operation is performed to transport preceding medium and following medium together while maintaining partial overlap, then printing throughput is improved, but printing quality decreases due to surface level differences and gaps between overlapping and non-overlapping areas
Solution Approach 1:
The patent applies local quality by differentiating the treatment of overlapping and non-overlapping areas. The printing unit adjusts printing parameters specifically for the overlap area where surface level differences occur, while maintaining normal printing parameters for non-overlap areas. This localized adjustment ensures high printing quality in critical overlap regions without compromising overall throughput.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting printing parameters based on the overlap state. When the printing unit detects that it is printing on the overlap area between preceding and following mediums, it modifies parameters such as printing speed, ink discharge amount, or head position to compensate for surface level differences and gap variations, thereby maintaining consistent printing quality throughout the consecutive overlap-feeding operation.
2Duration of action of stationary object
If printing is performed on the overlap area between preceding medium and following medium, then printing continuity is maintained, but printing quality decreases due to different surface levels and gaps
Solution Approach 1:
The patent employs feedback mechanisms where the printing unit continuously monitors the printing state and detects when it is operating on the overlap area. Based on this feedback information, the system automatically adjusts printing parameters in real-time to compensate for surface level differences and gaps, ensuring that printing continuity is maintained without sacrificing quality in the overlap regions.
3Manufacturing precision
If the proportion of printing region to nozzle row length is increased to meet predetermined value, then printing quality on overlap area is improved, but device complexity increases due to additional control processes
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-positioning the printing parameters before entering the overlap area. The controller determines the overlap region boundaries in advance and prepares the appropriate printing parameters beforehand, allowing for smooth transitions into and out of the overlap zone without requiring complex real-time adjustments, thus improving quality while minimizing added complexity.
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 printing disorders and reduces the frequency of decreased printing quality by ensuring proper alignment and ink distribution during consecutive overlap-feeding, enhancing overall printing performance.
Implementation Method 1
a printing unit that performs printing by discharging liquid on the medium transported by the transporting unit
Data Source
AI summary
There is provided a printing device which can suppress a decrease in printing quality with respect to a following medium which is generated when performing a consecutive overlap-feeding operation of transporting a preceding medium and a following medium together to a printing start position of the following medium in a state where the preceding medium and the following medium partially overlap each other.