Plastic Cap Pouring Protrusion Groove Design
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Solution Overview
Problem
Existing plastic caps with pouring protrusions either fail to maintain a consistent liquid width during pouring due to variations in container inclination or are inefficient in pouring both small and large amounts, leading to inconvenient spills.
Innovation Solution
A plastic cap design featuring a pouring protrusion with a bill at its upper end, an inclined inner surface, and a groove system that extends from the seal surface to the bill, allowing for constant liquid width and stable pouring regardless of inclination, along with a buffer protrusion to prevent discomfort and ensure smooth pouring into small containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bill is formed to greatly protrude outward at the upper end of the pouring cylinder to improve liquid cutting performance, then liquid cutting performance is improved, but the width of liquid poured varies when container inclination varies
Solution Approach 1:
The patent applies local quality by creating a groove at a specific location on the inner surface of the bill, rather than modifying the entire bill structure. This localized groove constrains the liquid flow in a specific area, maintaining liquid width consistency while preserving the bill's overall protruding structure and liquid cutting performance.
2Ease of operation
If the pouring cylinder is designed to pour liquid smoothly at constant rate, then smooth pouring is achieved, but the structure becomes complex to accommodate both small and large amount pouring
Solution Approach 1:
The patent segments the pouring control function into two distinct components: the bill structure that handles liquid cutting and the groove that handles flow constriction. This segmentation allows each component to perform its specific function independently, achieving smooth pouring for both small and large amounts without requiring a complex integrated structure.
Data Source
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AI summary
[Problems] To provide a plastic cap having a pouring cylinder capable of pouring the content liquid smoothly maintaining a constant liquid width even in case the degree of inclination of a container is varied to some extent at the time of pouring the content liquid, and of easily adjusting the liquid quantity. [Means for Solution] A bill 20 is formed at an upper end portion of the pouring cylinder 11 provided in a top panel 5 of a cap body 1, the bill 20 protruding outward in an inclined manner, a lower end of the pouring cylinder 11 is forming a seal surface 17 of nearly a cylindrical shape, a groove 30 is formed in the inner surface of the bill 20 in the pouring cylinder 11 and is extending from an upper end portion of the seal surface 17 up to an upper end of the bill 20, and a seal ring 29 is formed on the inner surface of the upper lid 2 so as to come into close contact with the seal surface 17 which is the inner surface of the pouring cylinder 11 when the upper lid 2 is closed.