Paper Cup Rim Structural Integrity for Vending Dispensing
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Solution Overview
Problem
Beverage vending machines often experience failures when dispensing paper cups due to the rim being rolled over and flattened, leading to structural integrity issues and increased recycling challenges.
Innovation Solution
A paper cup design featuring a rigid shell-coated rim, a separate moulded pulp fibre rim component with a flange portion, or an expandable filler material within the rim void, which enhances structural integrity and recyclability by preventing deformation during dispensing and eliminating plastic liners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional paper cup with a simple rim is used, then the cup is easy to manufacture and recycle, but the rim gets rolled over and flattened during dispensing, causing structural failure
Solution Approach 1:
The cup is divided into distinct functional components: a paper cup body and a separate rigid rim component. The rim component is an independent element that can be attached to the cup body, allowing the rim to have enhanced strength properties without requiring the entire cup structure to be complex. This segmentation enables the rim to be optimized for strength while keeping the cup body simple and recyclable.
Solution Approach 2:
The cup combines different materials with complementary properties: the paper cup body maintains recyclability and flexibility, while the rigid rim component (made from materials like polypropylene, polyethylene, or bioplastics) provides the necessary strength and rigidity to prevent rolling over during dispensing. This composite structure resolves the contradiction between strength and simplicity by applying material complexity only where needed.
2Reliability
If a rigid rim component is added to prevent rim deformation, then dispensing reliability improves, but the cup structure becomes more complex
Solution Approach 1:
By separating the rim function from the cup body, the invention allows the rim component to be independently optimized for reliability while maintaining a simple overall cup structure. The rim component specifically addresses the dispensing reliability issue without complicating the cup body design or manufacturing process.
Solution Approach 2:
The enhanced rigidity and strength are applied locally only to the rim component where it is needed for reliable dispensing, rather than making the entire cup structure complex. The cup body remains simple and unchanged, so the local enhancement at the rim does not propagate complexity throughout the entire device.
3Object-affected harmful factors
If plastic liners are used in paper cups, then liquid barrier properties improve, but recyclability deteriorates
Solution Approach 1:
The invention removes the plastic liner from the cup body entirely, eliminating the recycling problem. Instead, a rigid rim component is added to provide structural integrity. This extraction of the problematic plastic liner while maintaining necessary functionality through the rim component resolves the contradiction between protection and recyclability.
Solution Approach 2:
The design enables the cup body to be discarded and recycled as pure paper material without contamination from plastic liners. The rigid rim component, while separate, allows the paper portion to be recovered and recycled efficiently, addressing the harmful effect of mixed-material recyclability issues.
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 enhanced rim strength and recyclable materials ensure consistent cup dispensing and environmental sustainability by preventing deformation and allowing for full recyclability without plastic liners.
Implementation Method 1
the rigid filler material may be one that expands upon application of heat thereto
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A paper cup and a method of forming the same. The paper cup may include a sidewall and a floor portion that collectively define a cavity. In one aspect, the paper cup may include a rim that is coated with a rigid shell that encapsulates the rim. In another aspect, a void defined by a rim of the paper cup may be filled with a rigid filler material, and the rigid filler material may be one that expands upon application of heat thereto. In yet another aspect, the paper cup may include a separate rim component that is attached to the sidewall. The separate rim component may be formed from moulded pulp fibres, and it may include a flange portion that is attached to the sidewall and a rim portion that protrudes from the sidewall.