Laser Print Quality Control for Paper Carbonization Printing
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Solution Overview
Problem
Conventional printing apparatuses face challenges with ink limitations, nozzle clogging, and byproduct contamination, particularly when dealing with various paper types and conditions, affecting print quality and safety.
Innovation Solution
An inkless printing apparatus that uses a laser to carbonize paper substrates, incorporating a print quality sensor and controller to adapt operation based on substrate characteristics and byproduct detection, with features like pre-heating, byproduct discharge, and a coating to enhance print permanency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laser is used to carbonize paper substrates, then print quality and permanency are improved, but byproduct contamination (smoke, organic volatiles, tar compounds) increases
Solution Approach 1:
The patent applies this principle by using the carbonization byproducts (tar compounds and organic volatiles) that would normally be harmful contaminants and converting them into a beneficial adhesive binder. The controller is configured to control the laser to polymerize these tar compounds, transforming them into a substance that binds the char particles to the paper substrate, thereby improving print permanency while managing the contamination issue.
Solution Approach 2:
The patent applies this principle by dynamically adjusting laser parameters (power, speed, pulse duration) based on detected substrate characteristics and byproduct levels. The controller adapts the laser settings in real-time to optimize carbonization efficiency while minimizing harmful byproduct generation, and to control the polymerization of tar compounds for optimal binding.
2Manufacturing precision
If laser power is increased to improve print quality, then carbonization effectiveness increases, but substrate damage and byproduct generation increase
Solution Approach 1:
The patent applies this principle by making the laser parameters dynamic rather than static. The controller continuously adjusts laser power, scanning speed, and pulse characteristics based on real-time feedback from substrate characteristic detection and byproduct level monitoring, allowing optimization of print quality while preventing substrate damage.
Solution Approach 2:
The patent applies this principle by implementing a closed-loop control system where the controller receives information about substrate characteristics and byproduct generation, then adjusts laser parameters accordingly. This feedback mechanism ensures that laser power is optimized for print quality while preventing excessive carbonization that would damage the substrate or generate harmful byproducts.
3Adaptability or versatility
If the printing apparatus is used with various paper types and conditions, then versatility is improved, but print quality consistency deteriorates
Solution Approach 1:
The patent applies this principle by implementing dynamic adaptation of laser parameters based on detected substrate characteristics. The controller adjusts laser power, speed, and pulse characteristics in real-time according to the specific paper type, thickness, moisture content, and surface properties detected, thereby maintaining consistent print quality across diverse substrates.
Solution Approach 2:
The patent applies this principle by systematically varying laser parameters (power, scanning speed, pulse duration, frequency) based on the detected substrate characteristics. The controller stores and retrieves optimized parameter sets for different paper types, enabling consistent print quality while maintaining versatility across various substrates.
4Object-generated harmful factors
If a transparent cover is used to obtain a low oxygen environment, then byproduct condensation on paper is reduced, but the cover gets contaminated and laser beam effectiveness decreases
Solution Approach 1:
The patent applies this principle by extracting or removing the transparent cover from the system, or by providing an alternative approach that does not require sealing the carbonization zone. The controller manages the carbonization process and byproduct polymerization in an open or partially open environment, eliminating the contamination and beam attenuation problems associated with using a transparent cover.
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 apparatus achieves high-quality, long-lasting prints on diverse substrates while minimizing byproduct contamination and ensuring user safety by adapting laser settings and using a coating to polymerize tar compounds and compress reaction products.
Implementation Method 1
The carbonization reaction on the one hand produces char that acts as a black pigment on the paper object. Furthermore, organic volatiles that are also produced by the carbonization reaction are condensed on the paper object where they function as an adhesive binder for the char
Implementation Method 2
at least one laser for selectively heating one or more parts of the surface of said paper object to a level wherein the heated part of said surface at least partly carbonizes and thereby changes color
Implementation Method 3
organic volatiles that are also produced by the carbonization reaction are condensed on the paper object where they function as an adhesive binder for the char
Implementation Method 4
the controller is configured to adapt operation of said printer based on the print quality information
Data Source
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AI summary
The present invention relates to a printing apparatus, comprising: a feed, a printer, a controller configured to control operation of the printer, and a print quality sensor configured to acquire print quality information, wherein the controller is configured to adapt operation of said printer based on the print quality information. The invention further relates to a printing method, comprising the steps of: - printing on a substrate in a printing operation; - acquiring print quality information; and - adaptation of the printing operation based on the print quality information.