Corrugated Container Removable Window Tear Line
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Solution Overview
Problem
Existing multipurpose shipping containers that convert into display cases are often labor-intensive, expensive, and require excessive materials, with prior designs often necessitating the use of cutting tools, leading to workplace hazards and material damage, and lacking sufficient strength for stacking.
Innovation Solution
A multipurpose shipping container design utilizing a unitary corrugated fiberboard blank with a removable window that can be easily converted into a display case without cutting tools, featuring a unique folding mechanism and separation lines to ensure easy assembly and strength, while minimizing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If prior container designs use removable windows for display case conversion, then ease of conversion is improved, but reliability deteriorates due to premature separation or ragged openings
Solution Approach 1:
The window panel incorporates a tear strip with a tear line that transitions the window from a fixed state to a removable state through controlled dynamic separation. The tear line allows the window to be cleanly removed by pulling along the scored line, providing both ease of conversion and reliable clean separation without premature failure or ragged edges.
Solution Approach 2:
The window panel is segmented into a fixed portion and a removable portion separated by a tear line. This segmentation allows the window to function as a single integrated panel during shipping while enabling clean separation into distinct portions for display case conversion, resolving the contradiction between retention and ease of removal.
2Adaptability or versatility
If cutting tools are used to convert containers to display cases, then conversion capability is improved, but harmful factors worsen due to workplace hazards and material damage
Solution Approach 1:
The patent replaces the mechanical cutting system (cutting tools) with a pre-scored tear line system. The tear line is a predetermined weakness in the material that allows clean separation through simple pulling motion, eliminating the need for cutting tools and associated workplace hazards while maintaining conversion capability.
Solution Approach 2:
The tear line is pre-formed during manufacturing as a scored line through the corrugated material. This preliminary action creates a controlled separation path that enables easy window removal without cutting tools, eliminating workplace hazards while preserving full conversion capability.
3Ease of manufacture
If containers are designed for easy assembly, then ease of manufacture is improved, but strength deteriorates due to insufficient stacking capability
Solution Approach 1:
The patent merges the assembly features (self-forming corners through interlocking flaps) with strength features (double-layer construction, adhesive bonding, and integrated flap structures) into a unified design. The corners are formed by combining folded flaps from both layers that interlock and are adhesively bonded, providing both ease of assembly and stacking strength in a single integrated structure.
Solution Approach 2:
The container uses a composite structure with two layers of corrugated fiberboard bonded together through adhesive applied to interior surfaces. This composite construction provides enhanced strength for stacking while maintaining ease of assembly through the self-forming corner design, resolving the contradiction between simple assembly and structural strength.
Data Source
AI summary
A shipping and display container that can be formed from one or more blanks folded and formed according to a method for creating the container such that it encloses the storage space on all sides. A portion of the blank forming the front wall can be formed from two stacked, joined layers including an interior and an exterior blank layer. An interior separation line can be formed in the interior blank layer that creates locking teeth along the line to support the removable window in the front wall during shipping and storage. A plurality of nicks extend across an exterior separation line to also structurally support and retain the removable window while enabling it to be quickly removed to display the goods.