Flexible Packaging Venting via Front Wall Inversion
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Solution Overview
Problem
Conventional flexible packaging containers face challenges with venting due to compression of the intermediate space when filled, leading to inefficient venting processes and increased manufacturing costs, particularly in the placement and turning of bags for venting purposes.
Innovation Solution
The inner ply is arranged on the front wall facing the intermediate space, attached by two longitudinal seams between top and bottom transverse seams, allowing for improved venting without the need for a turning station, using a separate strip that can be thinner and less expensive, with strategically placed venting openings and spacers to enhance airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the venting opening is provided in the rear wall area with overlapping edges, then venting can be achieved, but the intermediate space is compressed when the bag is placed on its back, preventing or hindering venting
Solution Approach 1:
The patent inverts the conventional approach by placing the venting opening in the front wall instead of the rear wall. The inner ply is attached to the front wall by longitudinal seams, creating an intermediate space that remains accessible for venting even when the bag is placed on its back. This inversion resolves the contradiction by ensuring venting reliability without compression interference.
2Reliability
If bags are placed on the front side for venting purposes and then compressed to a flat state, then venting can occur, but this requires additional time and machine technology including a turning station
Solution Approach 1:
The patent enables the packaging container to perform venting automatically without requiring external manipulation. By positioning the venting opening in the front wall with the inner ply attached by longitudinal seams, the intermediate space self-vents when the bag is placed on its back, eliminating the need for turning stations and additional processing steps, thereby improving productivity while maintaining venting reliability.
3Ease of manufacture
If the inner ply is formed by a strip supplied in longitudinal direction, then material quantity and costs are reduced, but the venting performance must be optimized through proper positioning and configuration
Solution Approach 1:
The patent applies local quality by using a strip of inner ply material attached to the front wall by longitudinal seams. The strip is positioned and configured with specific width and attachment patterns to optimize venting performance in critical areas while using less material overall. This allows cost-effective manufacturing without compromising venting reliability through strategic placement and design of the intermediate space.
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
This configuration enables effective venting of the packaging container even when resting on its back, reducing manufacturing complexity and costs, while allowing for adaptable venting performance tailored to the type and quantity of goods stored, ensuring efficient airflow at minimal pressures.
Implementation Method 1
by means of a receiving space venting device arranged in the inner ply venting of the holding space into the intermediate space
Data Source
AI summary
Disclosed is a flexible packaging container, in particular a plastic film pouch or bag for bulk goods, comprising a front wall (2) and a rear wall (3) as well as a holding space (15) between said walls (2, 3) for goods to be stored; the walls (2, 3) are made at least in part of a film material; the flexible packaging container further comprising an intermediate space (14) which is formed by an inner ply (4) and is separated from the holding space (15) by said inner ply (4); the holding space (15) can be evacuated into the intermediate space (14) via at least one holding space evacuation hole (7) in the inner ply (4), and the intermediate space (14) can be evacuated out of the packaging container (1) via at least one additional evacuation hole (11) that interrupts a transverse seam; the front wall (2) does not comprise any of the longitudinal seam (12) that seals the packaging container (1) in the peripheral direction; the inner ply (4) is formed by a strip (4) which is located on a side of the front wall (2) facing the intermediate space (14) and which is fastened to the front wall (2) using two longitudinal seams extending between top and bottom transverse seams (5.1, 5.2).