Packaging Valve Membrane Pin Straight Jet Discharge
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Solution Overview
Problem
Existing packaging systems, such as those disclosed in DE 102 17 655 A1, often suffer from liquid filling material being discharged in an oblique direction due to the sleeve-like membrane adhering to the pin, limiting their effectiveness for both liquid and pasty materials.
Innovation Solution
A packaging design featuring a base body with a central pin and a cap with an elastic membrane that forms a receiving chamber, where the membrane is preloaded to ensure liquid exits in a straight jet, and an air chamber with venting valves for pressure compensation, allowing for easy assembly and use with both liquid and pasty materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sleeve-like membrane is used to close the outlet opening, then the outlet opening can be sealed, but the membrane adheres to the pin causing liquid to discharge in an oblique direction
Solution Approach 1:
The invention extracts the membrane from direct contact with the pin by positioning it at the outlet opening while the pin extends through the receiving chamber without touching the membrane. This eliminates the adhesion problem that caused oblique discharge while maintaining sealing effectiveness through the membrane's position at the outlet opening.
Solution Approach 2:
The invention introduces a receiving chamber as an intermediary space between the pin and the membrane. This chamber allows the pin to extend freely while the membrane seals the outlet opening, preventing direct contact and adhesion between the pin and membrane, thus ensuring straight liquid discharge.
2Stress or pressure
If air enters the intermediate chamber during discharge, then pressure compensation occurs, but air enters the inner bag contaminating the filling material
Solution Approach 1:
The invention segments the internal space into two separate chambers: the inner bag containing the filling material and the intermediate chamber for pressure compensation. This segmentation prevents air that enters the intermediate chamber from reaching the filling material in the inner bag, while still allowing pressure compensation to occur in the intermediate chamber.
Solution Approach 2:
The intermediate chamber acts as an intermediary buffer zone between the outer packaging and the inner bag. It accepts air entry for pressure compensation during discharge, preventing air from directly entering the inner bag and contaminating the filling material, thus protecting the filling material from air contamination while maintaining pressure balance.
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 packaging system ensures efficient discharge of filling materials in a straight longitudinal direction, suitable for both liquids and pastes, with minimal parts and assembly effort, maintaining airlessness by preventing ambient air entry into the inner bag.
Implementation Method 1
a cap (8) which is fastened to the upper end portion or to the neck of the external container and covers the base body and the upper, preferably slightly outwardly curved end wall of which is formed by an elastic membrane (16)
Implementation Method 2
the membrane being lifted from the pin upon exertion of pressure on the external container by the pressurized filling material contained in the receiving chamber
Implementation Method 3
When the external container is compressed (squeezed), the venting valve is tightly closed by the raised pressure in the air chamber so that no air can exit out of the air chamber
Implementation Method 4
air enters due to the negative pressure, which is created in the intermediate chamber between the external container and the inner bag, through the venting valve into the air chamber
Data Source
AI summary
The packaging comprising an essentially dimensionally stable, elastically deformable external container, an easily deformable inner bag arranged therein, which receives the filling material, and a valve, is characterized in that the valve comprises a base body which extends over the opening of the external container and comprises at least one through opening for the filling material and a pin oriented away from the external container, and a cap which is fastened to the neck of the external container and covers the base body and the upper end wall of which is formed by a membrane which delimits a receiving chamber for the filling material between the cap and the base body and comprises an outlet opening for the filling material which in the unpressurized state of the packaging is closed by the pin in that the membrane with the area containing the outlet opening rests under preload on the pin, the membrane being lifted from the pin upon exertion of pressure on the external container by the pressurized filling material contained in the receiving chamber, so that filling material can exit, and that the cap comprises an air chamber which is separated from the receiving chamber for the filling material and sealed relative to the receiving chamber and the external container and which is connected via at least one hole through the wall of the external container to the intermediate chamber between the external container and the inner bag and via at least one venting valve to the exterior atmosphere.