Linear-Motor Cap Applicator Rail for Precise Low-Maintenance Capping

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Solution Overview

Problem

Existing cap applicator systems for pourable products are cumbersome, complex, and costly, with high component counts, limited flexibility, and high maintenance needs.

Innovation Solution

A cap applicator system with a single closed-loop rail and 'power on board' configuration, using a linear motor and electrically-powerable components, including a gripping unit and actuator, powered by a separate energizing track for precise cap positioning and application without additional tracks or lever mechanisms.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If traditional cap applicator systems with multiple tracks and lever mechanisms are used, then cap application function is achieved, but device complexity increases and maintenance difficulty increases

Engineering Contradiction:
Improvecomponent countVSAvoidmaintenance ease
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The patent removes the complex lever mechanisms and multiple track systems from traditional cap applicator designs. By extracting these unnecessary intermediate mechanical components and replacing them with a direct linear motor-driven cart system on a single closed-loop rail, the device complexity is significantly reduced while maintaining the cap application function.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces traditional mechanical lever mechanisms and multi-track systems with an electrically-powered linear motor system. The linear motor directly drives the cart along a single closed-loop rail, eliminating the need for complex mechanical linkages, reducing component count, and simplifying maintenance requirements.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If traditional mechanical linkages and multiple tracks are used, then cap positioning is achieved, but reliability decreases due to more moving parts

Engineering Contradiction:
Improvesystem reliabilityVSAvoidmechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces mechanical linkages and multiple track systems with an electrically-powered linear motor system. The linear motor directly drives the cart along a single closed-loop rail, eliminating the need for complex mechanical linkages, reducing component count, and simplifying maintenance requirements.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The single closed-loop rail system with linear motor provides multiple functions: it supports the cart, guides its movement, and provides the driving force. This multi-functional design eliminates the need for separate mechanical linkages and multiple tracks, thereby improving reliability by reducing the number of moving parts.

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

3Adaptability or versatility

If fixed configuration cap applicators are used, then manufacturing cost is reduced, but adaptability to different package and cap formats decreases

Engineering Contradiction:
Improveformat flexibilityVSAvoidsystem configuration
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a dynamic, reconfigurable cart system that can be easily adjusted to accommodate different package and cap formats. The cart's electrical powering and control system allows for flexible positioning and adaptation to various formats without requiring complex mechanical reconfiguration, thus improving adaptability while keeping the overall system configuration manageable.

Inventive Principle:
Principle #15Dynamics

4Manufacturing precision

If multiple tracks and lever mechanisms are used, then cap application precision is achieved, but maintenance cost increases

Engineering Contradiction:
Improvecap positioning precisionVSAvoidmaintenance cost
Core Design Contradiction:
Manufacturing precisionVSEase of repair

Solution Approach 1:

The patent removes the complex lever mechanisms and multiple track systems from traditional cap applicator designs. By extracting these unnecessary intermediate mechanical components and replacing them with a direct linear motor-driven cart system on a single closed-loop rail, the device complexity is significantly reduced while maintaining the cap application function.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces traditional mechanical lever mechanisms and multi-track systems with an electrically-powered linear motor system. The linear motor directly drives the cart along a single closed-loop rail, eliminating the need for complex mechanical linkages, reducing component count, and simplifying maintenance requirements.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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

Reduces component count, enhances reliability, simplifies maintenance, and increases flexibility in handling different package and cap formats, while maintaining low costs and wear.

Implementation Method 1

a linear motor configured to selectively and independently move the cart members along the endless track

Methodology Applied
Scientific EffectLinear motor: Linear Motor

Implementation Method 2

each cart member comprising an electrically-powerable component and a receiver configured for receiving electrical energy and powering the component

Methodology Applied
Scientific EffectElectrical energy conversion:

Data Source

PatentEP4495018B1Cap applicator system for a packaging machine and method for applying caps
Publication Date: 2026.02.04 TETRA LAVAL HOLDINGS & FINANCE SA
  • EP4495018B1 patent drawingFigure 1
  • EP4495018B1 patent drawingFigure 2~3

AI summary

There is described a cap applicator system (1) for applying caps (2) onto packages (3) containing a pourable product and comprising: an endless track (4) extending through a cap receiving station (R) and a cap application station (A); a plurality of cart members (5) movably coupled with the endless track (4), each cart member (5) having at least one electrically-powerable component (10) and a receiver (11) configured for receiving electrical energy and powering the component (10); a linear motor configured to move the cart members (5) along the endless track (4) selectively and independently from one another, each cart member (5) being configured to cyclically receive one respective cap (2) at the receiving station (R), to retain and convey such cap (2) along the endless track (2), and to apply such cap (2) onto one respective package (3) at the application station (A); and at least one powering station (P) arranged along the endless track (4) and configured for transmitting electrical energy; the linear motor is configured to selectively move each cart member (5) through the powering station (P), whereby the receiver (11) receives electrical energy from the powering station (P) thereby powering the component (10).