Printing apparatus and printing method including penetration liquid
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Solution Overview
Problem
Existing ink jet recording apparatuses face challenges in achieving uniform density on both sides of a sheet-like recording medium, particularly when the type of print paper is changed, leading to insufficient ink penetration and unsuitable results for reversible products like scarves.
Innovation Solution
A printing apparatus with a discharge unit that applies ink and penetration liquid to one side of the medium, a movement unit for relative movement, and an adjustment unit that adjusts the discharge amount of the penetration liquid based on movement speed, transport speed, and reciprocating movement speed to minimize density differences between sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ink to which penetrant has been added is used to promote penetration of ink into print paper sheet, then penetration of ink is improved, but density uniformity on both sides of the sheet deteriorates when paper type changes
Solution Approach 1:
The penetrant is separated from the ink into a distinct component. The discharge unit includes separate ink discharge means and penetrant discharge means, allowing independent control and optimization of each substance's application, enabling adaptation to different paper types without compromising penetration uniformity
Solution Approach 2:
The discharge amount of penetrant is dynamically adjusted based on paper type and printing conditions. The control unit varies penetrant discharge quantities according to the specific paper being printed on, maintaining optimal penetration across different media while preserving density uniformity
2Ease of operation
If fixed discharge amount of penetrant is used, then discharge control is simplified, but density difference between front and back sides increases when movement speed varies
Solution Approach 1:
The penetrant discharge amount is dynamically adjusted according to the relative movement speed between the discharge unit and the print sheet. When movement speed increases, the discharge amount is increased proportionally to maintain consistent penetration and density uniformity across varying printing 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 ensures that the density difference between the front and back sides of the printed medium is minimized, enabling the production of reversible products like scarves with consistent appearance and quality.
Implementation Method 1
penetration liquid which promotes penetration of the ink into the other side of the recording medium
Data Source
AI summary
A printing apparatus including a discharge unit, a movement unit and an adjustment unit. The discharge unit discharges ink and penetration liquid onto one side of the recording medium. The penetration liquid promotes penetration of the ink into the other side of the recording medium. The movement unit moves the discharge unit and the recording medium relative to each other. The adjustment unit adjusts a discharge amount of the penetration liquid discharged from the discharge unit onto the recording medium based on at least a relative movement speed of the discharge unit to the recording medium.