Container Filling Valve Venting Using Reverse-Flow Bypass

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Solution Overview

Problem

Conventional venting techniques are ineffective for small container filling valves and small pipe diameters, leading to gas bubbles in the filling nozzle that impair the filling process and result in lower filling quality.

Innovation Solution

A device with a bypass line connected to the filling line allows for venting by reversing the flow, enabling gas bubbles to be conveyed back to the product reservoir, eliminating the need for a drip tray and allowing simultaneous material discharge and venting functions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional venting techniques are used with small container filling valves and small pipe diameters, then the filling device structure is simple, but gas bubbles cannot be effectively removed and filling quality deteriorates

Engineering Contradiction:

Improveventing effectivenessVSAvoidfilling device structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies the inversion principle by reversing the normal filling flow direction to create a backward flow through the bypass line. This backward flow actively pushes gas bubbles from the filling valve back toward the material reservoir, enabling effective venting in small-diameter systems where conventional upward buoyancy-based venting fails. The inversion transforms the filling line into both a forward supply path and a backward venting path.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The bypass line serves multiple functions: it acts as a venting path for gas bubble removal, provides an alternative material supply route, and enables active gas evacuation without requiring separate dedicated venting components. This multi-functionality resolves the contradiction by achieving effective venting while maintaining structural simplicity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If the filling valve is closed after container filling, then the filling process is complete, but gas bubbles are drawn into the nozzle and affect filling quality

Engineering Contradiction:

Improvefilling cycle speedVSAvoidfilling quality

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent applies preliminary action by activating the bypass line to remove gas bubbles immediately after the filling valve closes, before the next filling operation begins. This proactive gas removal prevents bubbles from being drawn into the nozzle during subsequent filling cycles, maintaining filling quality without extending the overall filling cycle time.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The bypass line enables continuous gas bubble removal operations between filling cycles, ensuring the filling line remains bubble-free throughout the entire production process. This continuous maintenance of filling line purity allows rapid cycling while consistently achieving high filling quality.

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If material flows forward to fill containers, then filling is achieved, but gas bubbles accumulate in the filling line

Engineering Contradiction:

Improvefilling rateVSAvoidgas bubble accumulation

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The bypass line acts as an intermediary path that mediates between the forward material flow and gas bubble removal. By introducing this intermediate backward flow path, the system can simultaneously maintain forward filling operations and actively evacuate gas bubbles, resolving the conflict between productivity and harmful gas accumulation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent uses hydraulic principles by utilizing the material flow itself as the driving force for gas bubble removal. The backward flow of material through the bypass line creates a pneumatic-hydraulic action that pushes gas bubbles along the filling line toward the reservoir, eliminating the need for separate gas removal mechanisms and maintaining high filling rates.

Inventive Principle:

Principle #29Pneumatics and hydraulics

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 solution effectively removes gas bubbles within seconds, ensuring rapid and reliable venting, particularly for small container filling devices, and enhances filling quality by preventing material ejection.

Implementation Method 1

A device with a bypass line connected to the filling line allows for venting by reversing the flow, enabling gas bubbles to be conveyed back to the product reservoir

Methodology Applied

Scientific EffectFluid flow reversal:

Data Source

PatentEP4653384A1Device for filling containers and associated operating method

Publication Date: 2025.11.26 KRONES AG

Figure 1~2

AI summary

The invention relates, inter alia, to a device (10) for filling containers (12) with a fill material. The device (10) comprises a fill material reservoir (18) and a feed line (20) connected to the fill material reservoir (18). The device (10) further comprises a filling element (44) with a filling valve (46) and a filling line (48) connecting the fill material reservoir (18) and the filling valve (46). The device (10) also comprises a further line (54) connected to the filling line (48) for media discharge and/or media supply, and a bypass line (62) connecting the fill material feed line (20) and the further line (54).