Foldable Clamshell Carton Triangular Flap Nesting
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Solution Overview
Problem
Existing foldable paperboard containers are difficult to stack and store due to their shape, and their collapsible construction weakens sidewalls, leading to instability and potential food spillage.
Innovation Solution
A clamshell-style carton with a tray and cover portion, featuring foldable panels and triangular flaps that allow for compact stacking and increased rigidity, including angled end flaps and curved profile edges for enhanced structural integrity and interference fit, enabling secure upright configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the container is formed with sidewall flaps glued or connected together to form sidewalls, then the container structure is complete and functional, but the container becomes difficult to stack and nest together and requires significant wasted space during transport and storage
Solution Approach 1:
The container is designed with nested foldable sidewalls where the front and rear sidewalls can be folded inward and nested within the side sidewalls when collapsed. This nesting capability allows multiple containers to be stacked compactly, dramatically reducing storage space requirements while maintaining structural integrity when assembled.
2Ease of manufacture
If the container uses foldable/collapsible construction, then the container can be easily formed and compacted for storage, but the sidewalls are weakened along fold lines and can fail to maintain upright configuration
Solution Approach 1:
The sidewalls are divided into multiple segments including front sidewall, rear sidewall, and side sidewalls, connected through foldable joints. This segmentation allows the structure to collapse compactly for storage while maintaining sufficient strength when assembled. The triangular fold flaps and end flaps create a distributed structural system that reinforces the fold lines rather than weakening them.
Solution Approach 2:
The container utilizes composite construction combining paperboard material with a multi-component foldable structure. The combination of triangular fold flaps, end flaps, and sidewall panels creates a composite structural system that provides both foldability and structural strength, preventing sidewall collapse while enabling compact formation.
3Adaptability or versatility
If the container sidewalls are weakened along fold lines, then the container can be folded and collapsed, but food and items can easily fall out and the container can be easily deformed
Solution Approach 1:
The container incorporates preliminary reinforcing features in the form of triangular fold flaps and end flaps that are pre-positioned at the fold lines. These elements are designed to engage and lock together when the container is assembled, creating preliminary structural support that prevents sidewall collapse and food spillage before the container is even in use.
Data Source
AI summary
A foldable clamshell container is provided. The container may include a tray portion and a cover portion. The tray portion may include a front panel, rear panel, and side panels. The side panels may include triangular fold flaps on each end that are secured end flaps connected to the front and rear panels. The rear panel may have a height greater than the front and side panels and the cover portion may be foldably connected to an upper edge of the rear panel. The cover panel may include a cover panel, a front panel, and cover side panels with a triangular fold flap. The rear end flaps of the tray portion and the cover side panels may each include a curved edge portion. The container may be configured to transition between a folded-flattened configuration and an unfolded configuration by folding the triangular fold flaps of the tray and cover portions.