Textured Vacuum Transport Belt Surface Roughness
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Solution Overview
Problem
Conventional media vacuum-transport systems face limitations in vacuum pressure distribution due to smooth surfaces on belts and drums, leading to localized force application, oversized blowers, and inefficient patterns, which affect media hold-down performance.
Innovation Solution
A media vacuum transport system with a substrate having a top coat layer featuring a polymer blend and dispersed particles, providing an average surface roughness of 2 μm to 100 μm, which enhances vacuum pressure distribution by creating a textured surface for uniform suction force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If smooth surfaces are used on belts and drums, then the sealing effect is improved, but the vacuum pressure distribution becomes localized and inefficient
Solution Approach 1:
The patent applies a top coat layer with different surface properties (roughness Ra 2-100 μm) over the substrate to create localized variations in surface quality. This textured surface layer is specifically designed to improve vacuum pressure distribution while maintaining the sealing function, thus resolving the contradiction between sealing effectiveness and vacuum distribution efficiency.
Solution Approach 2:
The patent uses a composite structure consisting of a substrate and a top coat layer made from polymer blends (such as ethylene-vinyl acetate copolymer, styrene-butadiene copolymer, polyethylene, polyvinyl chloride, polyvinylidene chloride, polyoxymethylene, polypropylene, polybutylene, polycarbonate, polyester, polyarylate, or terephthalic acid resin). This composite material system provides both the sealing function of the substrate and the improved vacuum distribution properties of the textured top coat layer.
2Device complexity
If localized vacuum force application is used, then the belt-hole interface is simplified, but oversized blowers and large belt-holes are required
Solution Approach 1:
The top coat layer creates localized variations in surface properties that enhance vacuum pressure distribution. This allows the system to maintain a relatively simple belt-hole interface while achieving more uniform vacuum distribution, thereby reducing the need for oversized blowers and large belt-holes.
Solution Approach 2:
The patent changes the surface roughness parameter of the belt surface by applying a top coat layer with controlled roughness (Ra 2-100 μm). This parameter change improves the vacuum pressure distribution efficiency, allowing for smaller blowers and smaller belt-holes while maintaining effective vacuum application.
3Force
If high vacuum pressure is applied, then media hold-down force is sufficient, but energy consumption and system cost increase
Solution Approach 1:
The textured top coat layer creates localized variations in surface properties that improve vacuum pressure distribution across the media surface. This enhanced distribution efficiency allows for achieving sufficient media hold-down force with lower overall vacuum pressure, thereby reducing energy consumption and system costs.
Solution Approach 2:
The composite material system (substrate plus top coat layer) provides improved vacuum distribution characteristics that enable effective media hold-down at reduced vacuum pressure levels, leading to lower energy consumption while maintaining adequate holding force.
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 textured surface distributes suction force uniformly, increasing media hold-down force and reducing the need for high vacuum pressure, thus improving media transport efficiency and reducing costs.
Implementation Method 1
the top coat layer can have an average surface roughness Ra of about 2 μm to about 100 μm
Implementation Method 2
holding onto the media by applying vacuum through the holes of the substrate to generate a suction force
Data Source
AI summary
Provided are media vacuum transport systems including media vacuum transport members, methods of making media vacuum transport members, and method of transporting media. In accordance with various embodiments, there is a media vacuum transport system including a vacuum plenum one or more transport members configured to rotate around the vacuum plenum and wherein at least one of the one or more transport members can include a substrate, the substrate comprising a plurality of holes extending from a first side proximate to the vacuum plenum to a second side opposite the first side, and a top coat layer disposed over the substrate, wherein the top coat layer can include a plurality of particles dispersed in a polymer blend to provide an average surface roughness Ra of about 2 μm to about 100 μm.