Multi-layer Wrapper for Printing Machine Cylinder Cleaning Rolls
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Solution Overview
Problem
Existing pre-packaged cleaning systems for printing machine cylinders fail to maintain the integrity and stability of solvent-impregnated fabrics during storage, transport, and installation due to solvent permeation and bag deformation, especially with aggressive solvents, as conventional plastic materials like polyester and polypropylene are not perfectly impermeable and structurally resistant.
Innovation Solution
A multi-layer wrapper with a metallic impermeable layer and a heat sealable layer is used to create a tubular bag that completely wraps the solvent-impregnated fabric rolls, preventing solvent escape and maintaining stability through vacuum or atmospheric pressure sealing, ensuring the solvent's viscosity and cleaning effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional plastic materials (polyester or polypropylene) are used for packaging solvent-impregnated fabric rolls, then the packaging is flexible and easy to manufacture, but the solvent permeates through the bag, deforms it, and compromises structural integrity
Solution Approach 1:
The patent applies composite materials by combining multiple plastic layers (polyester and polypropylene) with an aluminum foil layer to create a multi-layer packaging structure. This composite construction provides both flexibility for manufacturing and handling while achieving the required impermeability to aggressive solvents, preventing solvent permeation and bag deformation.
2Reliability
If hermetically sealed bags are used to package solvent-impregnated fabric rolls, then the packaging provides better protection, but the solvent still escapes and deforms the bag through permeation
Solution Approach 1:
The hermetically sealed bag uses a multi-layer composite structure including polyester, polypropylene, and aluminum foil layers. This composite material provides enhanced protection against solvent escape by creating a barrier that prevents permeation, while the hermetic sealing ensures complete containment of the solvent-impregnated fabric rolls during storage and transport.
Solution Approach 2:
The patent employs flexible thin film packaging made from multi-layer plastic and aluminum composite materials. This flexible shell structure provides effective protection against solvent escape while maintaining the ability to be hermetically sealed, preventing harmful solvent exposure during storage and transport conditions.
3Reliability
If multi-layer wrapper with metallic impermeable layer is used to prevent solvent permeation, then the impermeability and structural resistance are improved, but the device complexity increases
Solution Approach 1:
The multi-layer wrapper combines polyester, polypropylene, and aluminum foil layers to achieve superior impermeability and structural resistance to aggressive solvents. While this composite construction increases manufacturing complexity compared to single-layer materials, it provides the necessary reliability for preventing solvent escape and maintaining package integrity during storage and transport.
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 prevents solvent permeation and deformation, maintaining the impregnation's integrity and stability during storage, transport, and installation, ensuring consistent cleaning performance and chemical stability.
Implementation Method 1
a layer (5) which is impermeable to a solvent, which superposes the supporting layer (4)
Implementation Method 2
the ends (3a) are then closed during packaging of the roll (2)... heat sealable layer (6) associated with the impermeable layer (5)
Implementation Method 3
ensuring the solvent's viscosity and cleaning effectiveness... vacuum or atmospheric pressure sealing
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Described is a pre-packaged cleaning system for cylinders of printing machines (1), comprising at least one roll (2) of fabric pre-impregnated with solvent and designed for being associated with at least one cylinder of a printing machine and a wrapper (3) wound around the roll. The wrapper (3) comprises at least one supporting layer (4) and at least one layer (5) impermeable to the solvent and superposed on the supporting layer (4).