Flexible Web Treatment Machine State Detection

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Solution Overview

Problem

Current methods for controlling treatment machines for continuous flexible webs lack the ability to automatically distinguish between preparation, production, and stop states without analyzing the quality of the printed product, and do not account for the duration of these states or transitions between them.

Innovation Solution

A method that uses sensors to monitor operating parameters of the treatment machine's units, a programmable control device to analyze these parameters, and automatically detect relevant variations to infer the operation state, storing this information in a local or remote register, allowing for continuous monitoring and differentiation between preparation, production, and stop states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If automatic analysis of printed product quality is used to distinguish operation states, then measurement precision is improved, but device complexity and cost increase significantly

Engineering Contradiction:
Improveoperation state detection accuracyVSAvoidequipment and software complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent extracts the essential characteristics needed for operation state detection from the complex quality analysis system. Instead of analyzing actual printed product quality, it extracts and monitors key operating parameters (web speed, heater temperature, ink supply rate) that indirectly indicate the operation state. This extraction approach maintains detection accuracy while eliminating the need for complex quality analysis equipment.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces intermediary parameters as mediators between the machine operations and state detection. Rather than directly analyzing printed product quality, it uses intermediate operating parameters (web speed from encoder, temperature from sensors, ink supply rate from flow meters) as proxies to infer operation states. These intermediaries simplify the detection system while maintaining reliability.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Productivity

If manual analysis of operation states is used, then device complexity is reduced, but productivity and measurement precision deteriorate

Engineering Contradiction:
Improvestate detection efficiencyVSAvoidtime for state analysis
Core Design Contradiction:
ProductivityVSLoss of time

Solution Approach 1:

The system performs self-service by automatically monitoring its own operating parameters and autonomously determining operation states. The control unit continuously collects data from sensors and encoders, automatically compares parameters against predefined thresholds, and self-determines current operation states without external intervention. This eliminates time loss associated with manual analysis while maintaining system simplicity.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent implements continuous feedback loops where operating parameters are constantly monitored and fed back to the control unit for real-time state determination. The system uses feedback from web speed encoders, temperature sensors, and ink supply flow meters to continuously update operation state assessments, enabling rapid detection without manual intervention and eliminating time delays.

Inventive Principle:
Principle #23Feedback

3Measurement precision

If comprehensive monitoring of all operating parameters is implemented, then measurement precision is improved, but use of energy and device complexity increase

Engineering Contradiction:
Improveoperation state detection accuracyVSAvoidenergy consumption for monitoring
Core Design Contradiction:
Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies local quality by monitoring only the specific operating parameters that are locally relevant to each operation state transition. Instead of comprehensively monitoring all possible machine parameters, it focuses on key local indicators: web speed at critical points, heater temperatures only when heating is active, and ink supply rates during printing operations. This selective local monitoring maintains detection precision while minimizing energy consumption.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system employs partial action by monitoring operating parameters only when and where necessary for state determination. It uses predefined thresholds to trigger monitoring only when parameters approach critical values, rather than continuously monitoring all parameters at full intensity. This partial monitoring approach reduces energy consumption while maintaining sufficient measurement precision for reliable state detection.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentEP3251851B1Method for controlling the operation of a continuous flexible web treatment machine
Publication Date: 2021.04.21 COMEXI GRP IND
  • EP3251851B1 patent drawingFigure 1
  • EP3251851B1 patent drawingFigure 2

AI summary

The invention relates to a method for controlling the operation of a treatment machine for treating a continuous flexible web, said proposed method comprising the acquisition of information about operating parameters of a treatment machine (1), referring to different operation states comprising at least: one preparation state (E1) in which element and/or parameter preparation and/or adjustment operations are performed in the feed unit (10), treatment unit (20) and/or take-up unit (30) of the treatment machine, one production state (E2) in which the treatment task is performed on a flexible web (3) as it is moving, and one stop state (E3) of the treatment machine in which none of the preparation or adjustment or treatment activities is being performed, the different states being detected automatically by means of analyzing the acquired data referring to the operating parameters.