Compact Through-Air Apparatus Using Circuitous Air Path
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Solution Overview
Problem
Conventional through-air apparatuses face challenges in achieving high performance while maintaining a compact size, leading to issues with product quality, production throughput, and high capital costs, as well as complex installation and large shipment sizes.
Innovation Solution
A compact through-air apparatus with a high flow circuitous air path and modular panelized construction, featuring a through-air roll with a recirculating air path and turning vanes, which reduces the overall volume and enables efficient air flow and temperature uniformity, while allowing for easier assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional through-air apparatuses use traditional air path designs, then air flow performance can be achieved, but the apparatus volume becomes large and capital costs increase
Solution Approach 1:
The patent applies dimensionality change by transitioning from traditional linear air paths to a three-dimensional circuitous air path that utilizes vertical and radial dimensions within the drum structure. Air enters through the drum core, flows radially outward through the web, and exits through the drum perimeter, creating a volumetric flow pattern that achieves high air flow performance within a compact apparatus volume.
Solution Approach 2:
The patent implements nesting by placing the air supply conduit system within the drum core, which is itself nested within the drum structure. The supply conduit is positioned inside the drum core volume, and the air path is routed through the drum wall thickness, effectively utilizing nested spatial arrangements to maximize air flow efficiency without increasing external apparatus dimensions.
2Productivity
If conventional through-air apparatuses are designed for high performance, then air flow characteristics improve, but the apparatus becomes less compact and requires more space
Solution Approach 1:
The patent utilizes three-dimensional space within the drum structure to achieve high air flow characteristics without increasing footprint. The circuitous air path extends vertically through the drum core and radially through the drum wall, using the drum's height and radial thickness to create an efficient air flow path that maintains compact footprint while delivering superior air flow performance.
Solution Approach 2:
The patent employs curved and circular flow paths within the drum structure, with air flowing along the circumferential direction at the drum perimeter. The drum's cylindrical geometry provides natural curved flow paths that optimize air distribution across the web surface, achieving high air flow characteristics within a compact circular footprint.
3Manufacturing precision
If conventional through-air apparatuses use complex air path designs, then air flow uniformity improves, but the apparatus complexity and installation difficulty increase
Solution Approach 1:
The patent merges multiple functions into the drum structure itself. The drum serves as both the web support surface and the air distribution medium, with the drum core acting as the air supply chamber and the drum wall serving as the air distribution pathway. This integration eliminates the need for separate air distribution components, reducing apparatus complexity while maintaining air flow uniformity through the circuitous air path design.
Solution Approach 2:
The patent applies local quality by positioning air supply openings specifically within the drum core and routing air through the drum wall thickness where it is needed. The air path is localized to the drum structure, with supply openings positioned to distribute air uniformly across the web contact surface, achieving manufacturing precision without requiring complex external air distribution systems.
4Strength
If conventional through-air apparatuses are built with traditional construction methods, then structural integrity is maintained, but shipment size and installation complexity increase
Solution Approach 1:
The patent divides the apparatus into modular segments: the drum core as a separate assembly, the drum wall with integrated air paths, and the web support surface. This segmentation allows the drum to be manufactured as discrete components that can be assembled together, reducing shipment size and simplifying installation while maintaining structural integrity through proper mechanical connections between segments.
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 achieves high performance air flow characteristics in a compact space, reducing capital costs and installation complexity, with a smaller footprint and faster delivery times, while maintaining tight air flow and temperature uniformity.
Implementation Method 1
a plurality of turning vanes positioned within the high flow circuitous path positioned to guide the flow of air through the apparatus
Implementation Method 2
a fan may blow air through the wall of the through-air roll to treat the web
Data Source
AI summary
A high performance through-air apparatus is provided. The though-air apparatus includes a through-air roll configured for rotational movement about a first axis, and a high flow circuitous air path inside of the apparatus that includes a path extending through a supply conduit, through the through-air roll, and also through an exhaust conduit. The through-air apparatus also includes a plurality of turning vanes positioned within the high flow circuitous path positioned to guide the flow of air through the apparatus. The through-air apparatus has a length, a width, a height, which together define a volume having a compact configuration. The high flow circuitous air path inside of the apparatus has a length, where the ratio of the volume of the through-air apparatus to the length of the high flow circuitous air path is less than 20 m2.