Paper Cup Outer Shell Bonding for Stacking Stability
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Solution Overview
Problem
Conventional paper cups with indentations for stacking suffer from material weakening, leading to deformation under axial forces, especially in high stacks or large filling quantities, compromising stability and stacking performance.
Innovation Solution
A paper cup design featuring a conical shell with an outer shell bonded above and below the indentation, using adhesive connections to stiffen the cup and improve stacking stability, allowing for taller stacks and secure handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an indentation is provided in the shell for stacking cups, then stacking properties are improved, but the paper material is weakened at the indentation area causing deformation under axial forces
Solution Approach 1:
The outer shell is divided into multiple bonding regions (first region above indentation, second region below indentation) to distribute structural support functions, allowing the indentation to remain for stacking while preventing deformation through distributed reinforcement
Solution Approach 2:
The cup structure combines inner shell and outer shell as composite layers, where the outer shell bonded at multiple regions compensates for the local weakening at the indentation area, creating a composite structure that maintains both stacking capability and structural strength
2Stability of the object's composition
If the outer shell is bonded to the inner cup above and below the indentation, then the cup is stabilized and stacking performance is improved, but the device complexity increases
Solution Approach 1:
The outer shell is pre-formed with bonding surfaces and then bonded to the inner cup in a controlled manufacturing process, allowing the stabilization function to be achieved through a systematic assembly procedure rather than complex integrated design
Solution Approach 2:
The outer shell serves multiple functions: it provides structural stabilization through bonding above and below the indentation, maintains insulation properties by spacing from the inner cup, and enables improved stacking performance, consolidating multiple benefits into a single component
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 bonding of the outer shell to the inner cup above and below the indentation significantly stabilizes the cup, enhancing stacking properties and providing a secure feel when filled, enabling the use of thinner materials and maintaining insulation.
Implementation Method 1
the outer shell being bonded to the shell in a first region above the indentation and in a second region below the indentation
Data Source
Figure 1
Figure 2~3
AI summary
The cup (10,12) has base portion (16) and casing (14). The base portion in the region of lower end of fillable inner space is connected with casing in liquid-tight manner. The outer sheaths (28) are provided for covering the casings. The outer sheath is connected with the lower region of recess (24). The casing is connected with the upper region of recess. An independent claim is included for method for manufacturing cup.