Packing Sack Perforated Overlap Venting

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Solution Overview

Problem

Existing packaging sacks experience delays in the filling process due to restricted air escape, as air outlet openings in the overlapping area become closed when the inner and outer casings press against each other during filling.

Innovation Solution

The packaging sack features perforations in the second casing section of the overlapping area, which guides air through and keeps the casings apart, ensuring air outlet openings remain open and ventilation is maintained throughout the filling process, with recesses spaced to shorten the air escape path and prevent unintended closure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If air outlet openings are provided in the overlapping area of the protective cover, then air can escape during filling, but the openings close when inner and outer casings press against each other

Engineering Contradiction:

Improvefilling speedVSAvoidventilation function

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The protective cover is divided into first and second casing sections that overlap, with the second section having perforations. This segmentation allows the perforated section to remain spaced from the inner casing while the first section provides protective coverage, ensuring ventilation function is maintained independently.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The overlapping structure of the first and second casing sections acts as an intermediary mechanism. The second casing section with perforations is positioned to be spaced from the inner casing, and the overlapping arrangement with the first section provides a buffer that prevents direct contact and closure of the ventilation openings.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If the protective cover is glued in the overlapping area to ensure protective function, then structural integrity is improved, but air escape is restricted

Engineering Contradiction:

Improveprotective cover integrityVSAvoidfilling speed

Core Design Contradiction:

StrengthVSProductivity

Solution Approach 1:

The protective cover is segmented into glued and non-glued areas. The overlapping area provides structural integrity through gluing, while the second casing section with perforations remains unglued or partially glued to maintain spacing from the inner casing, ensuring both strength and ventilation function.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different parts of the protective cover have different bonding characteristics. The overlapping area has selective gluing where the first casing section is glued to provide structural support, while the second casing section with perforations has reduced or no gluing to maintain air escape pathways.

Inventive Principle:

Principle #3Local quality

3Reliability

If perforations are added in the second casing section, then ventilation is maintained, but device complexity increases

Engineering Contradiction:

Improveventilation functionVSAvoidprotective cover structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The second casing section serves multiple functions: it provides the protective cover structure, contains the perforations for ventilation, and maintains spacing from the inner casing through the overlapping arrangement. This multi-functionality reduces the need for separate ventilation components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The protective cover is formed from flexible film material that can be folded into overlapping sections. This allows the complex overlapping structure with perforations to be manufactured efficiently from a single continuous piece of material, reducing overall device complexity.

Inventive Principle:

Principle #30Flexible shells and thin films

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 design accelerates the filling process, reduces packaging costs, and shortens the amortization period for filling equipment, while ensuring effective ventilation at all filling levels and minimizing air turbulence to protect the packaged goods.

Implementation Method 1

the air is guided through the perforation of the second shell section of the protective covering in the overlapping area during the filling process in such a way that the air outlet opening is prevented from closing

Methodology Applied

Scientific EffectAir flow guidance:

Implementation Method 2

The special guidance of the air displaced from the inner casing ensures that the first casing section is kept at a distance from the second casing section during the filling process

Methodology Applied

Scientific EffectAir cushioning effect:

Data Source

PatentEP2179937B1Packing sack for packing items

Publication Date: 2014.12.10 SACHSA VERPACKUNG

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AI summary

The packaging bag (2) is provided with an inner shell for holding the packaged goods, where a protective cover (4) is provided to protect the packaged goods from environmental influences, particularly from moisture. The cover has overlapping region (6), in which a shell section of the protective cover overlaps another portion of the cover. A sleeve section (10) or the overlapping region is provided with a perforation (12) for venting.