Thermal Printer Duplex Sequence Optimization
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Solution Overview
Problem
In Dye Diffusion Thermal Transfer printers, the aggressively textured drive roller compromises the paper surface during duplex printing, leading to visible density differences and image artifacts, which existing compensation algorithms cannot fully correct, necessitating a reduction in contact between the roller and paper.
Innovation Solution
The printing method starts the next two-sided print on the same thermal print head and paper side as the previous print, reducing unnecessary repositioning and contact with the drive roller's aggressive texture, and determines the position of the receiver media to optimize the print sequence for duplex and simplex jobs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an aggressively textured drive roller is used to maintain image registration during duplex printing, then image registration between color passes is improved, but the paper surface becomes compromised leading to visible density differences and image artifacts
Solution Approach 1:
The system determines the position of receiver media before starting the next print job and pre-configures the printing sequence to minimize contact with the drive roller. By planning the print sequence in advance based on media position, the system reduces unnecessary repositioning that would cause additional paper surface compromise while maintaining image registration.
Solution Approach 2:
The system dynamically adjusts the printing sequence based on the real-time position of receiver media. By determining which thermal print head is nearer to the media and adapting the print sequence accordingly, the system minimizes the number of times the media must be repositioned through the drive roller, thereby reducing paper surface compromise while maintaining proper image registration.
2Adaptability or versatility
If the paper is repositioned between thermal print heads during duplex printing, then both sides of the paper can be printed, but the number of contacts with the aggressive texture increases causing more artifacts
Solution Approach 1:
The system determines the position of receiver media in advance and pre-plans the printing sequence to minimize repositioning operations. By knowing the media position before starting printing, the system can configure the sequence to print on both sides while reducing the number of times the media passes through the aggressive drive roller texture.
Solution Approach 2:
Instead of always printing side A first then side B, the system inverts the traditional approach by determining which side should be printed first based on media position. If the media is positioned nearer to the second thermal print head, the system prints side B first, then repositions and prints side A, thereby reducing unnecessary repositioning contacts with the drive roller.
3Manufacturing precision
If compensation algorithms are used to correct density variations, then some image artifacts are reduced, but hardware and firmware limitations prevent complete compensation
Solution Approach 1:
The system extracts and addresses the root cause of density variations by minimizing paper surface compromise through optimized print sequencing, rather than relying solely on post-processing compensation algorithms. By reducing the number of contacts with the aggressive drive roller texture, the system prevents density variations before they occur, reducing the burden on compensation algorithms.
Solution Approach 2:
The system takes preliminary action to prevent density variations by optimizing the print sequence before printing begins. By determining media position in advance and configuring the sequence to minimize repositioning, the system prevents paper surface compromise that would lead to density variations, reducing the need for complex compensation algorithms.
4Object-affected harmful factors
If unnecessary repositioning is eliminated to reduce paper contact, then image artifacts are reduced, but proper page sequence must be maintained
Solution Approach 1:
The system determines the position of receiver media in advance and pre-configures the printing sequence to maintain proper page order while minimizing repositioning. By planning the sequence beforehand based on media position, the system can eliminate unnecessary contacts with the drive roller while ensuring pages are printed in the correct sequence.
Solution Approach 2:
The system dynamically adjusts the printing sequence based on media position while maintaining proper page sequence. By determining which thermal print head is nearer and adapting the sequence accordingly, the system minimizes repositioning operations while ensuring that pages are printed in the correct order for duplex and simplex jobs.
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 approach minimizes paper surface compromise, reduces image artifacts, and maximizes printer throughput by eliminating one repositioning step, ensuring proper page order in photo books while reducing printer-generated artifacts.
Implementation Method 1
Dye Diffusion Thermal Transfer printers
Implementation Method 2
an aggressively textured drive roller... that applies a load between the paper and drive roller
Data Source
AI summary
A printing method wherein a position of a receiver media in a printer is determined to be nearer to one of two thermal printheads at an end of a print job. A next print job is started using either one of the two thermal printheads depending on which one was determined to be nearer the receiving media.