Drip Bag Hook Design for Octagonal Opening and Shape Stability
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Solution Overview
Problem
Conventional drip bags face challenges in increasing the opening area while maintaining a stable shape irrespective of the cup's opening diameter, as the difference in rigidity between the water-permeable filtering sheet and thin plate-shaped hook members makes it difficult to open the bag in a perfect circle.
Innovation Solution
The drip bag features special-shaped hook members with oblique and vertical folding lines on the outer surfaces, allowing the bag to open in a generally octagonal shape, which can be easily maintained and adjusted for various cup diameters by pulling the hook parts in opposite directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the opening is opened in a perfect circle shape to maximize opening area, then the opening area is increased, but the difference in rigidity between the water permeable filtering sheet and thin plate-shaped hook members makes it difficult to maintain shape stability and ease of opening manipulation
Solution Approach 1:
The opening is segmented into multiple straight edges forming an octagonal shape rather than a continuous circular curve. This segmentation allows the opening to achieve near-maximal area while maintaining structural stability through discrete geometric elements that are easier to control with thin plate-shaped hook members.
Solution Approach 2:
The invention uses an octagonal approximation of a circle, which captures the area-maximizing benefit of circular geometry while using straight edges that are more compatible with the rigidity constraints of thin plate-shaped hook members. This compromise achieves approximately 90% of the maximal circular area with improved shape stability.
2Ease of manufacture
If the opening is opened in a rectangular shape as in conventional drip bags, then the structure is simple and easy to manufacture, but the opening area is not maximized and pouring is less facilitated
Solution Approach 1:
The invention transitions from rectangular to octagonal geometry, which approximates the optimal circular shape for area maximization. The octagonal form with straight edges maintains compatibility with simple manufacturing processes while achieving significantly larger opening area compared to conventional rectangular designs.
3Ease of operation
If the opening area is increased to facilitate pouring, then hot water can be more easily poured into the bag body, but the opening shape becomes unstable and difficult to maintain irrespective of cup diameter
Solution Approach 1:
The opening is divided into multiple straight edges forming an octagon, which provides structural stability through discrete geometric elements. This segmentation allows the opening to maintain its shape when pulled open, regardless of the cup diameter, while still providing sufficient area for easy pouring operation.
Data Source
AI summary
A drip bag including a bag body having an upper end to be opened and two opposing surfaces, and a pair of hook members provided on outer faces of the opposing surfaces and spaced apart from vertical side edges of the bag body. Each of the hook members including an upper stuck part adhered along an opening of the bag body, a center part located below the upper stuck part, and a hook part not adhered to the bag body. For each of the hook members, a pair of oblique folding lines are formed on the upper stuck part, and a vertical folding line is formed downwardly from a lower end of each oblique folding line, whereby, in use, at least the oblique folding lines and the vertical folding lines cause the outer faces of the bag body to protrude outward from a bottom end of the bag body.