Carton With Double-Layered Lid And Protective Coating
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Solution Overview
Problem
Conventional cartons made from single-layer paper materials lack structural strength and are prone to dampness due to insufficient protection of their interior surfaces.
Innovation Solution
A carton design featuring a paper material with a protective layer on one surface, incorporating a double-layered lid structure with engaging components that enhance structural strength and prevent moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-layer paper material is used for the lid and box periphery walls, then the manufacturing process is simple, but the structural strength is insufficient
Solution Approach 1:
The patent uses a single-layer paper material with a protective layer (coating of protective oil or polypropylene) to create a composite structure that combines the simplicity of single-layer manufacturing with the strength and damp-proofing properties of the coated surface. The protective layer is applied to one surface of the paper material before folding, creating a strengthened structure without requiring multiple paper layers to be bonded together.
2Ease of manufacture
If the protective layer is coated on only one surface of the paper material, then the coating process is simple, but the interior surface not covered by the protective layer is prone to dampness
Solution Approach 1:
The patent addresses the damp-proofing issue by strategically positioning the protective layer on the interior surface of the lid's engaging components (engaging protrusions and engaging openings). This selective internal coating protects the critical areas where moisture would otherwise penetrate through the engaging mechanism, while maintaining the simplicity of single-sided coating for the main body surfaces.
3Ease of operation
If engaging openings and protrusions are formed on the front side of the lid, then the lid can be engaged with the box, but moisture may enter through these openings and reduce structural strength
Solution Approach 1:
The patent applies the protective layer specifically to the interior surface of the lid's engaging components (the engaging protrusions and the regions around engaging openings). This localized protection ensures that the critical areas where moisture penetration is most likely occur are shielded, while maintaining the engagement functionality. The engaging components retain their structural integrity and damp-proofing capability simultaneously.
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 structural strength and improved damp-proofing of the carton design effectively protect the contents from moisture and structural damage, surpassing the limitations of conventional cartons.
Implementation Method 1
The paper material for manufacturing the conventional carton 70 has a protective layer on one of its two opposite surfaces, wherein the protective layer can be formed by coating protective oil or polypropylene material (PP)
Data Source
AI summary
A carton made of a paper material having a protective layer formed on a surface thereof. The carton has a box and a lid being swingable relative to the box. The lid has a first front sheet and a second front sheet being foldable relatively and two first side sheets and two second side sheets being foldable relatively. The lid has a double-layered structure to improve its structural strength, and an interior side of the lid is also protected by the protective layer. The carton of the present invention has enhanced structural strength and better damp-proofing effect to preserve objects contained therein.