Multi-Blade Can Opener for Safe Flat Lid Removal
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Solution Overview
Problem
Traditional can openers are limited in their ability to efficiently and safely remove the planar top surface of sealed containers, particularly those without a tabbed opening, and often leave sharp edges, making them cumbersome and unsafe for use in bar or concession environments.
Innovation Solution
A can opener device with a platform, lever, and multiple arms, where the lever rotates to extend blades that engage and cut the inner circumferential edge of the container, allowing for the removal of the entire top surface while minimizing sharp edges and accommodating various container sizes and contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single blade is used to cut around the entire circumferential edge of the container, then the device structure is simple, but the opening process requires many rotations and is time-consuming
Solution Approach 1:
The patent divides the cutting function into multiple independent blades (first blade, second blade, third blade, fourth blade) positioned at different locations. Each blade cuts a portion of the circumferential edge simultaneously, transforming a single sequential cutting action into multiple parallel cutting actions, thereby significantly reducing the number of rotations needed.
Solution Approach 2:
The patent transitions from a single-point cutting approach to a multi-point distributed cutting approach by arranging blades at different angular positions around the container. This spatial distribution across multiple dimensions enables simultaneous cutting at multiple locations, converting a one-dimensional sequential process into a two-dimensional parallel process.
2Ease of operation
If traditional opening devices are used, then the setup and engagement process is simple, but sharp edges are left on the container rim causing safety hazards
Solution Approach 1:
The patent applies different functional qualities to different parts of the cutting system. The first and third blades are configured to cut the container rim, while the second and fourth blades are positioned to fold or roll the cut edges inward. This local differentiation of blade functions ensures that cutting and edge treatment occur simultaneously at different locations around the container.
Solution Approach 2:
The patent converts the potentially harmful sharp edges created by cutting into a beneficial feature by using the second and fourth blades to fold or roll these edges inward. The harmful sharp edges are transformed into rolled-under edges that are safer and can even be used for gripping or sealing purposes.
3Strength
If a blade is positioned to cut the circumferential edge, then the cutting action is effective, but the distance the rim protrudes outward makes engagement difficult
Solution Approach 1:
The patent employs rotatable arms that can dynamically adjust their position and orientation. The arms are connected to the container opening device through rotatable joints, allowing them to adapt to the container's geometry and bring the blades into proper engagement with the circumferential edge, regardless of the rim's protrusion distance.
Solution Approach 2:
The rotatable arms serve as intermediary elements between the cutting device and the container rim. These arms extend across the protruding rim distance, acting as mechanical linkages that transmit the cutting force from the device to the rim, effectively bridging the gap created by the rim's outward protrusion.
4Productivity
If multiple blades are used to cut different portions of the inner circumferential edge simultaneously, then the opening process is faster, but the device complexity increases
Solution Approach 1:
The patent designs the multiple blades to perform different functions within the same cutting system. The first and third blades are optimized for cutting, while the second and fourth blades are configured for folding or rolling edges. This multi-functionality allows the system to achieve both high-speed opening and safety benefits without requiring separate devices for each function.
Solution Approach 2:
The patent combines multiple cutting and edge-treatment functions into a single integrated device. Rather than using separate tools for cutting and for edge rolling, the invention merges these functions into one device with multiple blades working in coordination, thereby achieving productivity gains while consolidating rather than multiplying the number of separate components needed.
Data Source
AI summary
An apparatus and methods of opening containers which permit the user to remove the entire flat upper planar surface. The apparatus and methods, incorporate a platform with a plurality of arms operatively coupled to respective blade members that engage inner circumferential edge of a container by folding the edges inward. The blade members and arms are operatively coupled to a lever and rotate outward when the lever is compressed. The inventors have determined that apparatus and methods provided herein are able to adhere to the different sizes and contours of a sealed can lid. Additionally, by way of example, the inventors have determined that apparatus and methods provided herein can permit the user to safely remove the top of the can with both ease and efficiency.