Packaging Device Sealing Lip and Neck Design
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Solution Overview
Problem
Existing packaging devices for cosmetic products face issues with airtight sealing due to damage to the neck of the lower container during transport, particularly in unscrambling machines, leading to compromised sealing when the upper container is assembled.
Innovation Solution
A packaging device comprising a lower container with a neck featuring a sealing portion that can be elastically deformed, and an upper container with a dispensing member having an annular sealing lip that bears against the sealing portion of the neck, ensuring effective airtight sealing even during assembly and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the lower container is grabbed and rotated by its neck during transport in unscrambling machines, then the container can be conveyed and positioned, but the neck of the lower container is damaged which leads to alteration of the sealing between the two containers
Solution Approach 1:
The neck of the lower container is segmented into two distinct functional portions: a first portion (outer surface) for mechanical engagement and rotation during transport, and a second portion (inner surface) for providing an airtight seal. This segmentation allows the outer surface to withstand transport stresses while the inner sealing surface remains protected and undamaged.
Solution Approach 2:
Different portions of the neck are given different structural qualities: the outer surface is designed to be robust for handling and rotation, while the inner sealing surface is designed to be smooth and intact for airtight sealing. This local differentiation of properties allows the neck to simultaneously satisfy transport requirements and sealing requirements without compromise.
2Ease of manufacture
If the sealing lip is positioned at the end of the neck for easy assembly, then the assembly process is simplified, but the sealing is compromised when the neck is damaged during transport
Solution Approach 1:
The sealing function is separated from the transport function by positioning the sealing lip on the protected inner surface of the neck rather than at the exposed outer end. This segmentation of functions ensures that the sealing interface is not subjected to mechanical damage during handling while still allowing for straightforward assembly.
Solution Approach 2:
The inner surface of the neck acts as an intermediary sealing surface that is indirectly protected from transport stresses. Instead of exposing the sealing surface at the vulnerable end of the neck, the design uses the protected inner surface as a mediator to provide sealing while the outer surface handles all mechanical stress from transport operations.
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
The device achieves a reliable airtight seal between the upper and lower containers, preventing product leakage and maintaining product freshness during storage and transport, while also simplifying the assembly process.
Implementation Method 1
the sealing portion of the neck is configured to be elastically deformed when inserting the dispensing duct of the dispensing member in the neck of the at least one container
Data Source
AI summary
A device (10) for packaging at least one product and dispensing at least said product on a surface is provided, which comprises at least one container (12) delimiting a product cavity (22) containing said at least one product and a dispensing member (14) mounted on said container (12). The dispensing member (14) has a first dispensing orifice (24b) in flow communication with the product cavity (22), said container (12) has a neck (18) allowing access to the product cavity (22), said dispensing member (14) comprises a dispensing duct (24) in flow communication with the product cavity (22). An assembly skirt (30) radially surrounds said dispensing duct (24), and an annular sealing lip (32) is radially disposed between said dispensing duct (24) and said assembly skirt (30), said annular sealing lip (32) bears radially against a sealing portion (18c) of the neck (18) of the container (12). Said sealing portion (18c) is located axially away from an opened end of the neck (18).