Cartridge Insert Seal Design for Dispensing Leaks
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Solution Overview
Problem
Existing cartridges for dispensing devices face issues with inadequate sealing between the inherently rigid insert and the head part, leading to potential leaks and inefficiencies during material application.
Innovation Solution
A cartridge design featuring a non-inherently rigid elongate film pouch with an inherently rigid insert connected to the head part via a form-fitting or force-fitting connecting device, where the first surface of the insert and the second surface of the head part have a larger diameter facing away from the head part in the longitudinal direction, ensuring a secure and effective seal through radial outward forces, and a conical design with a specific angle for enhanced interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a latching device is used to connect the insert to the head part, then the connection is secure, but the sealing effect between the head part and the insert is insufficient
Solution Approach 1:
The patent applies different functional qualities to different regions of the insert. The connecting element provides mechanical connection, while a separate sealing element (designed as an O-ring or similar sealing structure) provides the sealing function. This separation of functions allows each element to be optimized for its specific purpose without compromising the other.
Solution Approach 2:
The patent introduces a sealing element as an intermediary component between the insert and the head part. This sealing element acts as a mediator that fills the gap or interface between the two components, ensuring effective sealing while allowing the latching device to maintain its connection function without direct involvement in sealing.
2Strength
If the insert is made inherently rigid for structural stability, then the connection strength is improved, but the sealing flexibility is reduced
Solution Approach 1:
The patent employs a composite structure consisting of an inherently rigid insert made from rigid material (such as plastic or metal) for structural strength, combined with a flexible sealing element made from elastomeric or rubber-like material. This composite approach allows the system to simultaneously achieve high connection strength from the rigid insert and effective sealing adaptability from the flexible sealing element.
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 design achieves a robust and reliable seal between the insert and the head part, ensuring secure contact and preventing leaks during dispensing operations, even under pressure, while allowing for easy detachment and reconnection of components.
Implementation Method 1
a good and secure contact between the insert and the head part with a correspondingly good seal, in particular during an application of pressure on the film pouch acting in the direction of the head part during a dispensing operation and a displacement caused thereby of the insert in the direction of the head part, is achieved by means of induced forces which act radially outwardly
Implementation Method 2
the insert is arranged at least in regions radially inside the head part and a connecting device is provided, by means of which the insert can be connected to the head part in a form-fitting and/or force-fitting manner
Data Source
AI summary
A cartridge for a dispenser, has at least one non-inherently rigid elongate film pouch and has a chamber for receiving a material, having a head part interacting with the film pouch and having an inherently rigid insert connected to the film pouch facing the head part, wherein the insert is arranged radially within the head part at least in regions. The insert and the head part are connected in a form-fitting and/or force-fitting manner. An outwards facing surface of the insert interacts in regions radially (R) with an inward facing surface of the head unit in a connection region transversely to a longitudinal direction (L) of the insert. The surface of the insert and of the head part have, in the connection region, a larger diameter in a region facing away from the head part than in a region facing the head part in the longitudinal direction (L), respectively.