Modular Plastic Film Processing Station for Roll Misalignment

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Solution Overview

Problem

Existing plastic film product manufacturing methods require large manufacturing footprints, are inefficient in handling spatial differences between pre-printed rolls, and necessitate frequent machinery realignment and maintenance.

Innovation Solution

A film processing station with interchangeable, independently operable modules on a supporting rail, dynamically coordinated by a controller, which clamps, cuts, and seals plastic film into finished products, accommodating roll misalignments and enabling modular, compact, and efficient production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple processing stations with different machinery are used to produce finished plastic film products, then the manufacturing capability is improved, but the manufacturing footprint becomes large

Engineering Contradiction:
Improvemanufacturing capabilityVSAvoidmanufacturing footprint
Core Design Contradiction:
Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent combines multiple processing functions (cutting, sealing, welding, zipper attachment) into a single integrated processing station. Different toolheads performing various operations are mounted on one shared carriage system that travels along a common rail, allowing multiple functions to be performed in a compact footprint rather than requiring separate stations spread out in space.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The carriage assembly serves multiple functions by being able to accommodate different toolheads for various operations. The same carriage and rail infrastructure supports cutting tools, sealing tools, welding tools, and zipper attachment tools, making the system universal and adaptable to different processing needs without requiring separate dedicated machinery for each function.

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

2Ease of repair

If the entire film product manufacturing line is stopped to perform maintenance on multiple pieces of different machinery, then the maintenance quality is improved, but the production time increases

Engineering Contradiction:
Improvemaintenance qualityVSAvoidproduction time
Core Design Contradiction:
Ease of repairVSLoss of time

Solution Approach 1:

The system is divided into modular, independently replaceable toolheads that can be serviced or replaced without stopping the entire manufacturing line. Each toolhead can be quickly detached and replaced on the carriage, allowing maintenance to be performed on individual components rather than requiring shutdown of the whole system.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system allows for quick changeover and maintenance through standardized interfaces and rapid toolhead replacement mechanisms. The carriage and rail system is designed to facilitate easy access and replacement of components, enabling operators to perform maintenance tasks quickly and efficiently with minimal disruption to production.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If pre-printed film rolls are misaligned with respect to the film processing machinery, then the realignment precision is improved by stopping and realigning all machinery, but the production continuity is worsened

Engineering Contradiction:
Improverealignment precisionVSAvoidproduction continuity
Core Design Contradiction:
Manufacturing precisionVSProductivity

Solution Approach 1:

The system uses sensors and control systems to monitor the position and alignment of the film web in real-time. This feedback information is used to dynamically adjust the positioning of the carriage and toolheads to compensate for misalignment between different film rolls, maintaining precise cutting and sealing positions without requiring manual intervention or production stoppage.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The carriage assembly is designed with dynamic positioning capabilities that allow it to adjust its position along the rail in real-time based on film roll alignment variations. This dynamic adjustment enables the system to accommodate creep and misalignment between pre-printed rolls while maintaining consistent processing quality and continuous production.

Inventive Principle:
Principle #15Dynamics

4Area of stationary object

If interchangeable, independently operable modules are used on a supporting rail, then the space requirements are reduced, but the system complexity increases

Engineering Contradiction:
Improvespace requirementsVSAvoidsystem complexity
Core Design Contradiction:
Area of stationary objectVSDevice complexity

Solution Approach 1:

The processing system is divided into modular, independently operable toolheads that can be selectively mounted on the carriage. Each module performs a specific function and can be quickly attached or detached, allowing the system to be configured for different production needs while maintaining a compact footprint. The modular design simplifies maintenance and changeover despite the sophisticated functionality.

Inventive Principle:
Principle #1Segmentation

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 system reduces space requirements, compensates for roll misalignments, and facilitates quick maintenance, enhancing production efficiency and flexibility.

Implementation Method 1

a cutting mechanism to cut and seal the plastic film

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

a heating element positioned above the anvil and movable toward the anvil to seal the plastic film

Methodology Applied
Scientific EffectHeating: Heating

Data Source

PatentEP3922441B1Methods and apparatuses to facilitate plastic film processing
Publication Date: 2025.08.27 SC JOHNSON & SON INC
  • EP3922441B1 patent drawingFigure 1
  • EP3922441B1 patent drawingFigure 2
  • EP3922441B1 patent drawingFigure 3

AI summary

A system (100), comprising: a film processing module (102); and a processor (202a) and memory (204a) in communication with the film processing module (102) to: dynamically coordinate movement of the film processing module (102) relative to a moving web of film (126), perform a function on the web of film (126) with the film processing module (102) to form a film product (142), and deposit the film product (142) on a conveyor (104) at a transfer position (248).