Card Issuing Print Control for High-Speed Aligned Thermal Transfer
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Solution Overview
Problem
Conventional card issuing systems face limitations in increasing printing speed due to the need for a low-speed feeding mode when dealing with thicker cards, which hinders efficient card production.
Innovation Solution
A medium issuing device that synchronously drives the medium conveyance and ribbon feeding parts at a higher speed after alignment, allowing for high-speed printing by controlling the conveyance speed and print head movement based on sensor detection and data acquisition status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the print head moves to a standby position before contacting the card, then the alignment between the print head and card is ensured, but the printing speed is reduced
Solution Approach 1:
The patent applies dynamics by enabling the conveyance part to operate at multiple speeds dynamically. The system transitions from a fixed low-speed conveyance mode to a variable-speed mode that accelerates during printing operations. This allows the medium to be conveyed at high speed while maintaining alignment through sensor feedback, thereby resolving the contradiction between alignment accuracy and printing speed.
Solution Approach 2:
The patent implements feedback by using a sensor to detect the position of the medium in the conveyance passage. This sensor information is fed back to the control part, which adjusts the conveyance speed accordingly. The feedback mechanism ensures that the medium remains properly aligned with the print head while allowing high-speed conveyance, thus resolving the alignment-speed contradiction.
2Productivity
If the conveyance speed is increased to reduce printing time, then the printing speed increases, but the alignment between the print head and medium may be compromised
Solution Approach 1:
The sensor-based feedback system continuously monitors the medium's position during high-speed conveyance and adjusts the conveyance speed in real-time to maintain proper alignment with the print head. This feedback mechanism enables high productivity while preserving positioning accuracy.
Solution Approach 2:
The system dynamically adjusts the conveyance speed based on the printing operation requirements. During alignment phases, the system operates at lower speeds to ensure positioning accuracy, while during actual printing, it accelerates to maximize throughput. This dynamic speed adjustment resolves the contradiction between productivity and positioning accuracy.
3Manufacturing precision
If the ink ribbon is pressed firmly against the card surface, then the printing quality is improved, but the mechanical complexity and pressure requirements increase
Solution Approach 1:
The patent applies parameter changes by adjusting the conveyance speed parameter rather than increasing mechanical pressure. By optimizing the speed at which the medium moves through the printing area, the system achieves good printing quality without requiring complex pressure control mechanisms. The controlled speed ensures proper contact time between the ink ribbon and card surface.
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 enables high-speed printing by ensuring precise alignment and continuous conveyance, reducing overall printing time for cards.
Implementation Method 1
a print head which brings an ink ribbon into contact with the medium conveyed in the conveyance passage by the medium conveyance part and prints on the medium
Data Source
AI summary
A medium issuing device includes a medium conveyance part, a print head, a sensor disposed on an upstream side of a conveyance passage with respect to the print head, a head drive part which moves the print head between a standby position and a printing position, a ribbon feeding part, and a control part. The control part controls so that, when detected that the sensor is turned on by a medium, the medium is conveyed at a first speed by the medium conveyance part, and the print head is started to move to the printing position by the head drive part and, in a case that a high speed mode is set, after the print head is contacted with the medium, the medium conveyance part and the ribbon feeding part are synchronously driven so that printing to the medium is performed at the second speed higher than the first speed.