Cup Lid Perimeter Drainage Structure for Spill and Heat Control
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Solution Overview
Problem
Existing drink-through lids fail to effectively contain liquid spills, especially for hot beverages, leading to discomfort due to heat transfer and spillage over the edges.
Innovation Solution
A reclosable cup lid design featuring a raised cover portion with a perimeter that directs liquid to drain into a central portion, incorporating a hinged tab for easy opening and a sloped ledge to prevent spillage, along with corrugations for heat management and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid is captured in an area adjacent to the drinking opening, then spillage is contained, but heat transfer causes discomfort to the drinker
Solution Approach 1:
The lid transitions from a flat two-dimensional surface to a three-dimensional contoured structure with raised perimeter portions and depressed central portions, creating depth variations that direct liquid flow away from the drinking opening while maintaining spill containment
Solution Approach 2:
The contoured perimeter portions act as intermediary structures between the liquid spill and the drinker's lips, redirecting the liquid flow path to prevent direct contact with the drinking opening area
2Reliability
If a raised cover portion is added to impede spillage, then liquid containment improves, but device complexity increases
Solution Approach 1:
The lid is segmented into distinct functional zones: raised perimeter portions for spill containment, depressed central portions for liquid drainage, and a drinking opening area, with each zone serving a specific purpose in the overall spill management system
Solution Approach 2:
Different regions of the lid have different heights and geometries optimized for their specific functions - the perimeter portions are raised to catch spills, while the central portions are depressed to facilitate drainage, creating local variations in structure that enhance overall performance
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 design effectively contains spills, reduces heat transfer discomfort, and provides a comfortable drinking experience by directing liquid into the central portion, maintaining a splash-resistant seal and accommodating condiments without lid removal.
Implementation Method 1
The sipping ledge may have a width along the perimeter of the lid of more than about 0.75′′, for example, so that the sipping ledge would feel to a drinker as the edge of an open cup. The sipping ledge may have a thickness of less than about 0.316′′, for example, to minimize the amount of liquid captured directly adjacent to the drinker's bottom lip, thereby reducing discomfort to the drinker due to heat transfer that may occur in the case of hot liquids.
Implementation Method 2
The perimeter of the raised cover portion may be adapted to cause liquid to drain away from the perimeter into a central portion of the lid.
Data Source
AI summary
A lid for a drinking cup may include a rim portion and a raised cover portion. The rim portion may be adapted to matingly engage an upper peripheral edge of the drinking cup so as to selectively maintain the lid in a covering relationship on the cup. The raised cover portion may extend from the rim portion, and have a perimeter adapted to impede spillage of liquid over a peripheral edge of the lid. Liquid spilled or released on the cover portion or perimeter portion may drain away from the periphery of the cover portion and into the drinking opening or a recess in the cover portion that is adapted to receive a reclosable tab.