Elastic Roller Wear Visibility Grooves for Print Accuracy
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Solution Overview
Problem
It is difficult for users to visually determine the wear volume and timing for replacement of elastic rollers, such as platen rollers, which affects print quality in thermal printers due to the inability to directly observe wear, leading to inconsistent print accuracy.
Innovation Solution
The elastic roller features a plurality of wear visibility grooves with varying heights and depths, filled with a filler of a different color, allowing for visual recognition of wear progression and timely replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the elastic roller is used for a long time, then the wear volume increases, but the print accuracy is degraded
Solution Approach 1:
The patent applies preliminary action by pre-forming wear visibility grooves at specific positions and depths on the platen roller surface before usage. These grooves are strategically placed so that as wear progresses, the coating layer gradually exposes the grooves in a predictable sequence, providing advance warning of wear-related print accuracy degradation before it becomes severe.
2Productivity
If the wear volume of the platen roller is not monitored, then the roller can be used continuously, but the user cannot determine the replacement time
Solution Approach 1:
The patent employs color changes by filling the wear visibility grooves with filler material that has a different color from the coating layer. As wear progresses and the coating layer thins, the contrasting colored filler becomes visible through the coating, providing clear visual information about wear volume and enabling users to determine replacement timing without interrupting continuous operation.
3Device complexity
If the wear visibility grooves are formed only on the coating layer, then the structure is simple, but the wear recognition is insufficient
Solution Approach 1:
The patent applies the nested doll principle by forming wear visibility grooves that extend through the coating layer and into the underlying elastic material layer. This nested structure allows the grooves to be visible at multiple stages of wear - initially visible through the coating layer, and as wear progresses, the grooves become more prominently exposed, providing progressively more accurate wear measurement information.
Data Source
AI summary
Formation of a plurality of wear visibility grooves 10 has been focused. An elastic roller includes: an inner layer side elastic material 4; a coating layer 5 disposed on an outer periphery of the inner layer side elastic material 4, the coating layer configured to make contact with the belt-shaped member; and a plurality of wear visibility grooves 10 (11, 12, 13) formed on an inner side of the coating layer 5 and formed on a surface of the inner layer side elastic material 4 in a circumferential direction, the plurality of wear visibility grooves being successively formed in an axial direction of the roller shaft, wherein at least two grooves of the plurality of wear visibility grooves have different heights, and filler is filled in the plurality of wear visibility grooves 10, the filler having a color different from that of the inner layer side elastic material 4 and different from that of the coating layer 5, and material of the filler is the same as that of the coating layer 5.