Transfer Ribbon Accumulator for Simultaneous Printing and Lamination
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Solution Overview
Problem
Conventional credential production devices are limited in speed due to the requirement that print and transfer operations must be performed in series, preventing simultaneous execution and thus restricting the efficiency of the transfer printing process.
Innovation Solution
A credential production device is designed with a transfer ribbon accumulator and independent feeding mechanisms for the printing and laminating devices, allowing simultaneous print and lamination operations by using first, second, and third ribbon-engaging members and a drive system to manage the transfer ribbon's path and tension, enabling independent operation of the printing and laminating processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If transfer and print operations are performed in series, then the device structure is simpler, but the production speed is limited
Solution Approach 1:
The transfer ribbon path is segmented into multiple sections with independent control. The first ribbon-engaging member controls the transfer ribbon path for the transfer operation, while the second and third ribbon-engaging members control the path for printing operations. This segmentation allows independent feeding and tension control for each operation, enabling simultaneous execution of print and transfer processes without mechanical interference.
Solution Approach 2:
The system employs dynamic tension control through the drive system that can independently adjust the tension and path length of the transfer ribbon. The third ribbon-engaging member can move relative to the first and second members, dynamically adjusting the ribbon path length to accommodate simultaneous printing and transferring operations while maintaining proper tension throughout the ribbon.
2Productivity
If independent feeding mechanisms are added for simultaneous operations, then productivity increases, but device complexity increases
Solution Approach 1:
The transfer ribbon accumulator serves multiple functions: it acts as a tension control device, a path management system, and a coordination mechanism between printing and transfer operations. The drive system not only tensions the ribbon but also coordinates the timing and speed of ribbon feed for both print and transfer operations, eliminating the need for separate feeding mechanisms.
Solution Approach 2:
The transfer ribbon accumulator acts as an intermediary device between the printing device and the transfer device. It buffers and coordinates the ribbon feed from both operations, allowing them to run simultaneously without direct mechanical conflict. The accumulator absorbs timing differences and tension variations, enabling independent operation of the printing and laminating processes.
3Productivity
If the transfer ribbon path length is adjusted, then simultaneous operations are enabled, but the mechanism complexity increases
Solution Approach 1:
The third ribbon-engaging member is nested within the structure formed by the first and second members. It moves along the transfer ribbon path between them, allowing compact arrangement of the tension control mechanism while maintaining the ability to adjust path length. This nested configuration minimizes space requirements and reduces overall mechanism complexity.
Data Source
AI summary
A credential production device includes a transfer ribbon, a printing device, a laminating device, and a transfer ribbon accumulator. The printing device is configured to print an image to the transfer ribbon. The laminating device is configured to transfer printed images from the transfer ribbon to a substrate. The transfer ribbon accumulator includes first, second, and third ribbon-engaging members (REM's), and a drive system. The first and second REM's have fixed positions relative to each other. The third REM is configured to move relative to the first and second REM's along an axis that extends through a gap between the first and second REM's. The drive system is configured to generate a force that drives movement of the third REM relative to the first and second REM's along the axis. Movement of the third REM relative to the first and second REM's along the axis changes a length of a path along which a portion of the transfer ribbon travels through the accumulator.