Continuous Sidewall Clam Shell Container Flex-Hinge
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Solution Overview
Problem
Conventional clam shell food containers require excessive glue, generate material waste, and are complex to produce, making them costly and inefficient for fast-food service applications.
Innovation Solution
A clam shell container design using a paperboard blank with only four adhesive points, featuring a flex-hinge construction and snap-over action, allowing for self-erection and conversion into a flat tray for easy consumption and storage, while maintaining food integrity and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional clam shell containers are made with multiple adhesive points, then structural strength is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates unnecessary adhesive points from the conventional design, reducing from multiple glue points to only four critical locations. This simplification maintains structural integrity while reducing manufacturing complexity and cost, directly addressing the contradiction between strength and manufacturing complexity.
Solution Approach 2:
The container design incorporates self-erection capabilities through strategic scoring and folding lines that allow the structure to self-assemble with minimal adhesive application. The four adhesive points are positioned to maximize structural strength while allowing the container to largely self-form during assembly, reducing the need for complex manufacturing processes.
2Reliability
If conventional clam shell containers use extensive glue application, then assembly reliability is improved, but material waste and production cost increase
Solution Approach 1:
The patent removes excess adhesive application from the manufacturing process, limiting glue to only four essential points where structural connection is required. This extraction of unnecessary material application maintains assembly reliability at the critical joints while significantly reducing material waste and production costs.
Solution Approach 2:
Instead of uniform adhesive application across multiple points, the patent applies adhesive locally and selectively at four specific high-stress connection points. This localized approach ensures reliability where needed most while minimizing material waste in areas where structural connection is less critical.
3Strength
If conventional clam shell containers are designed with complex forming, then structural integrity is improved, but production time and cost increase
Solution Approach 1:
The container design incorporates self-erection features through strategic scoring lines and geometric configuration that allow the structure to self-form into its final shape during assembly. This self-service capability eliminates complex forming operations, reducing production time and cost while maintaining structural integrity through the four-point adhesive system.
Solution Approach 2:
The blank is pre-scored and pre-configured with folding lines and geometric features that guide the self-erection process. This preliminary preparation of the blank form allows the container to automatically assume its structural configuration during assembly, eliminating the need for complex forming operations during production.
Data Source
AI summary
There is described herein a disposable clam shell food service container having a continuous sidewall which includes a novel flex-hinge panel between the lid and bottom of the container. This construction permits the container to open easily when the lid is pushed upwardly resulting in a flat tray like configuration devoid of the typical upstanding median wall or divider and which may be used as a serving plate by the consumer. The container may be easily snapped closed and locked to allow later consumption of any uneaten food products. Several additional embodiments of the invention are also presented, all of which include a continuous sidewall which ensures that the food product will remain warm and one of several lock means to secure the container in its closed condition. A triangular form of the container is also described for serving of pizza, pies and similar shaped food products.