Stamp-face platemaking device with pattern detection
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Solution Overview
Problem
Existing stamp-face platemaking devices are inefficient in detecting the size of the stamp face material, leading to incorrect platemaking and waste due to the large size and high cost of drive mechanisms, and the inability to accurately sense the size of the stamp face material, resulting in user errors.
Innovation Solution
A stamp-face platemaking device with a pattern detecting unit that scans the medium holder to identify the positions of predetermined patterns on the stamp face material, allowing for accurate size detection and a medium holder with a detachable holding unit featuring a predetermined pattern for secure ink impregnation, enabling precise platemaking without increasing device size or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a carriage-based drive mechanism with thermal head is used, then platemaking function is achieved, but device size becomes large
Solution Approach 1:
The patent extracts the thermal head from the carriage mechanism and positions it directly above the plate insertion portion, eliminating the need for a complex carriage-based drive mechanism while maintaining platemaking functionality
Solution Approach 2:
The device is segmented into distinct functional modules: a fixed thermal head unit, a separate plate insertion portion, and an independent medium holder transport mechanism, allowing compact arrangement without requiring a large carriage system
2Manufacturing precision
If an edge head thermal head is used, then platemaking precision is improved, but device cost increases significantly
Solution Approach 1:
The patent uses a conventional thermal head that replicates the essential heating function of expensive edge heads through precise control of heating elements, achieving adequate platemaking precision at lower cost
Solution Approach 2:
The patent optimizes parameters such as heating element dimensions, heating temperature, and heating duration to achieve effective platemaking with a conventional thermal head, eliminating the need for expensive edge head technology
3Device complexity
If stamp face material size is not detected, then device complexity is reduced, but platemaking accuracy deteriorates
Solution Approach 1:
The medium holder is designed with a predetermined pattern that enables the device to automatically detect and verify stamp face material size through simple optical sensing, eliminating the need for complex detection systems while ensuring platemaking accuracy
Solution Approach 2:
The patent uses a predetermined pattern with distinct visual characteristics (such as black markings on light-colored holder) that can be easily detected by simple optical sensors, enabling size verification without complex detection machinery
4Ease of manufacture
If user manually verifies stamp face material size, then detection cost is reduced, but time loss and error rate increase
Solution Approach 1:
The device performs automatic size verification through optical detection of the predetermined pattern on the medium holder, eliminating the need for manual verification by users and preventing time loss and errors
Solution Approach 2:
The detection unit provides immediate feedback on stamp face material size compatibility, allowing the device to automatically adjust or reject inappropriate materials, preventing platemaking errors and waste
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 solution allows for accurate detection of the stamp face material size, preventing platemaking errors and reducing costs by using a conventional thermal head without increasing the device's size or cost, while ensuring stable transportation and ink management.
Implementation Method 1
a sensor that detects respective positions of a top end portion of a medium holder on a sensor scanning line in an inserting direction, one pattern end portion of a predetermined pattern, and the other pattern end portion
Implementation Method 2
presses a thermal head against the surface of the porous sheet to move the stamp plate, selectively heats the heating element of the thermal head, and forms a stamp face on the stamp plate, the stamp face being formed with a melted and solidified portion that blocks ink and an unmelted portion through which ink passes
Data Source
AI summary
A stamp-face platemaking device transports a medium holder inserted into a plate insertion portion to a printing unit. The medium holder holds a stamp face material in a plate-like member, and has a predetermined pattern in a side end portion thereof. An optical sensor detects the top end portion of the medium holder on a sensor scanning line in the inserting direction, and the pattern start point and the pattern end point of the predetermined pattern. At least one of the horizontal and vertical sizes of the stamp face material is set based on the positions of two of the detected end portions. When the pattern end point is detected, platemaking with the stamp face material is started.