Sealer Trolley Slanted Cut for Packaging Splicing

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Solution Overview

Problem

Existing methods for splicing packaging material webs often result in a right-angle trailing end that can weaken the packaging container and generate dust and residue, leading to inefficiencies and quality issues.

Innovation Solution

A sealer trolley with a cutting unit that cuts the incoming web at a slanted angle, combined with a heating and pressure unit for improved sealing, reduces dust and residue, and includes a motor for precise movement and alignment, enhancing the integrity of the packaging container.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a circular knife is used to cut the trailing end of the material web, then the cutting operation can be performed, but dust and residue are generated causing stoppage and weakening the integrity of the packaging container

Engineering Contradiction:
Improvecutting operation continuityVSAvoiddust and residue generation
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful right-angle trailing end that generates dust into a beneficial slanted cut that minimizes residue. By changing the cut geometry from perpendicular to angled, the design eliminates the harmful dust generation effect while maintaining cutting functionality.

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent applies asymmetry by using a slanted cut angle instead of a symmetric right-angle cut. This asymmetric cutting approach creates a trailing end that tapers rather than forms a sharp corner, thereby reducing dust and residue generation during the cutting operation.

Inventive Principle:
Principle #4Asymmetry

2Ease of manufacture

If a right-angle trailing end is used in the weld, then the cutting process is simple, but the edge can get caught on sharp edges weakening the integrity of the packaging container

Engineering Contradiction:
Improvecutting process simplicityVSAvoidpackaging container integrity
Core Design Contradiction:
Ease of manufactureVSStrength

Solution Approach 1:

The patent changes the symmetric right-angle trailing end into an asymmetric slanted cut. This asymmetric geometry creates a tapered edge that is less likely to catch on sharp edges of the packaging container, thereby improving integrity while maintaining manufacturing simplicity.

Inventive Principle:
Principle #4Asymmetry

Solution Approach 2:

Instead of maintaining the conventional right-angle cut, the patent inverts the approach by applying a slanted cut angle. This inversion transforms the problematic sharp corner into a gradual taper, reducing the risk of edge catching while preserving the ease of the cutting process.

Inventive Principle:
Principle #13The other way round (Inversion)

3Manufacturing precision

If the sealer trolley moves automatically along the width of the web, then positioning precision is improved, but the device complexity increases

Engineering Contradiction:
Improveweb positioning accuracyVSAvoidsealer trolley system complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent implements self-service by enabling the sealer trolley to move automatically along the web width without requiring complex external positioning systems. The trolley utilizes the web itself as the guide and support structure, simplifying the overall system while achieving precise positioning.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent applies universality by designing the sealer trolley to perform multiple functions: it serves as both the sealing device and the positioning mechanism. The trolley's ability to move automatically along the web width provides both transportation and alignment functions, reducing the need for separate positioning systems.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 slanted cut and precise alignment improve the sealing integrity and reduce waste, increasing efficiency and quality by minimizing dust and residue generation.

Implementation Method 1

a heating unit (24) arranged to heat the web (10, 12) of packaging material

Methodology Applied
Scientific EffectHeating: Heating

Implementation Method 2

a pressure unit (25) arranged to apply pressure to the web (10, 12) of packaging material

Methodology Applied
Scientific EffectPressure: Pressure Increase

Data Source

PatentEP3831580B1Splice table with sealer trolley and splicing method
Publication Date: 2024.07.24 TETRA LAVAL HOLDINGS & FINANCE SA
  • EP3831580B1 patent drawingFigure 1a~1c
  • EP3831580B1 patent drawingFigure 2
  • EP3831580B1 patent drawingFigure 3

AI summary

A sealer trolley for use with a splice table is provided. The sealer trolley is configured to seal an incoming web of packaging material to an existing web of packaging material during a splicing operation. The sealer trolley comprises a cutting unit with a blade arranged to cut the incoming web of packaging material at a slanted angle. A splice table comprising such a sealer trolley and a method for splicing is also provided.