Puncturable Cap Piercer Sealing Bead Assembly
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Solution Overview
Problem
Flexible polymeric containers often require significant force and tools to remove caps after sterilization, leading to potential spillage and contamination issues during dispensing.
Innovation Solution
A fitment assembly with a spout, cap, and piercer that includes a sealing bead and indent system to secure and seal the piercer to the cap, allowing easy access and dispensing while minimizing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cap is rigidly affixed to the spout after sterilization, then the container contents are protected from contamination, but significant force and tools are needed to remove the cap, causing potential spillage
Solution Approach 1:
The cap is divided into two functional segments: a rigid portion that maintains secure attachment to the spout after sterilization, and a flexible pierceable center portion that allows easy penetration by a piercer tool. This segmentation enables the cap to remain firmly sealed during storage while allowing simple opening without requiring excessive force or specialized tools.
Solution Approach 2:
The cap material properties are changed locally at the pierceable center, making it more flexible and easier to penetrate while the rest of the cap remains rigid. This parameter change allows the cap to transition from a purely rigid structure requiring tools for removal to a structure that can be easily opened by applying slight pressure through the piercer.
2Ease of operation
If significant force is applied to remove the cap, then the cap can be detached from the spout, but container contents may spill
Solution Approach 1:
By segmenting the cap into rigid and flexible portions, the design allows the piercer to penetrate only the flexible pierceable center with minimal force, while the rigid portion maintains seal integrity. This prevents content spillage that would occur if the entire cap required high-force removal.
3Ease of operation
If a piercer is used to puncture the cap, then the cap can be opened easily, but a seal between the piercer and cap is needed to prevent leakage
Solution Approach 1:
The sealing function is merged with the piercer structure by incorporating an annular skirt that extends along the piercer's circumference. This skirt combines the piercing function with the sealing function, creating an integrated component that both opens the cap and prevents leakage during the dispensing process.
Solution Approach 2:
The annular skirt of the piercer is made of flexible material that can deform to conform to the cap's circumferential wall, creating a reliable seal. This flexible structure allows the piercer to maintain contact with the cap surface while preventing fluid leakage during the piercing and dispensing operations.
4Device complexity
If the piercer is secured to the cap using only the piercing piece, then the structure is simple, but additional securing means are needed to prevent piercer detachment
Solution Approach 1:
The attachment function is merged with the sealing function by making the annular skirt serve dual purposes: sealing against the cap wall and providing structural support for securing the piercer to the cap. This integration adds securing capability without significantly increasing device complexity.
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
Facilitates easy assembly and dispensing of container contents with reduced risk of spillage and contamination, using a sealing bead and indent system to secure the piercer to the cap, ensuring a tight seal during fluid communication.
Implementation Method 1
the sealing bead presses against the circumferential wall of the cap and forms a seal
Data Source
AI summary
The present invention is directed to a fitment assembly for a container. The fitment assembly includes a spout connected in fluid communication to the container, a cap sealing an end of the spout, the cap having a pierceable center, and a piercer for puncturing the cap at the pierceable center to permit fluid communication from the container through the spout and piercer. The present invention provides a seal between an annular skirt of the piercer and a circumferential wall of the cap so that when the piercer punctures the cap a seal is formed. The present invention also provides an additional means of securing the piercer to the cap utilizing the circumferential wall of the cap and the annular skirt of the piercer.