PTP Sheet Groove Depth Variation for Code Readability
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Solution Overview
Problem
PTP sheets for pharmaceutical packaging with mesh-shaped grooves often result in partial deletion or distortion of optically readable information, making it difficult to correctly and quickly read codes such as barcodes, especially when the grooves are shallow or distorted, leading to errors in scanning and reading.
Innovation Solution
A PTP sheet design with distinct regions of different groove depths, where the second region has shallower or no grooves, reducing deletion and distortion of printed codes, and an overlapping configuration to minimize gaps and ease of breaking, ensuring accurate and quick reading of information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mesh-shaped grooves are formed in the second sheet to prevent slipping during thermal pressure bonding, then bonding reliability is improved, but optically readable information (codes) on the surface becomes distorted or deleted
Solution Approach 1:
The patent applies local quality by creating two distinct regions on the second sheet: a first region with mesh-shaped grooves for bonding reliability and a second region without grooves for accurate code printing. This allows different parts of the same component to have different surface characteristics optimized for their specific functions.
Solution Approach 2:
The second sheet is segmented into functional zones: the first region (with grooves) for anti-slip bonding and the second region (without grooves) for information display. This segmentation resolves the contradiction by spatially separating the conflicting requirements.
2Strength
If mesh-shaped grooves are formed by pressing with convex portions during manufacturing, then bonding strength is improved, but the printed code information becomes distorted requiring multiple scans
Solution Approach 1:
The patent creates local quality differences by forming grooves only in the first region while keeping the second region smooth. This ensures that code printing occurs on a flat surface without distortion, enabling single-scan accurate reading while maintaining strong bonding in the grooved region.
Solution Approach 2:
The manufacturing process is segmented to apply pressure only to specific areas (first region) during thermal bonding, preserving the flatness of the second region where codes are printed, thus avoiding reading time losses.
3Reliability
If the entire surface of the second sheet has mesh-shaped grooves for preventing slipping, then thermal pressure bonding is improved, but information printing quality deteriorates
Solution Approach 1:
The patent implements local quality by restricting mesh-shaped grooves to the first region only, while maintaining a smooth surface in the second region. This allows code information to be printed clearly without distortion while still providing adequate bonding surface area in the grooved region.
Solution Approach 2:
The second sheet is divided into two functional segments: the first region with grooves for bonding and the second region without grooves for information integrity. This segmentation prevents information loss while maintaining bonding reliability.
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 correct and quick reading of optically readable information on PTP sheets, reducing errors and improving the packaging's functionality and usability.
Implementation Method 1
A first sheet in which solid pharmaceuticals are loaded and a second sheet containing aluminum foil or the like pass through a space between the rolls 19 and 20 in a thermal pressure-contact state, so that the second sheet is pasted to the first sheet under pressure
Data Source
AI summary
A PTP sheet for pharmaceutical packaging has a first sheet in which pockets each capable of housing a solid pharmaceutical are projected to the side of a first surface which is one of a back surface and a front surface and a second sheet which is pasted to a second surface opposite to the first surface in the first sheet and covers an opening of the pocket. The second sheet has a first region having mesh-shaped grooves having a first depth in a third surface opposite to the surface to be pasted to the second surface and a second region having mesh-shaped grooves having a second depth smaller than the first depth or not having a groove.