Flexible Strap Filter Cloth Fixation for Wringer Baskets

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing filtration devices for wringers require complex and costly assembly methods, often involving grooves and metal straps, which are prone to deformation and slipping, and are not adaptable to different basket types, making them inefficient and costly.

Innovation Solution

A filtration device with integral flexible straps welded or fused to the filter cloth, allowing for quick and secure attachment without grooves, suitable for various basket types, and preventing slipping, using tensioning means and transverse reinforcements for stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If metal straps of round section are used to fix the filter cloth, then the assembly is simplified compared to using braids, but the straps become deformed when bent with small radius of curvature and are prone to slipping

Engineering Contradiction:

Improveassembly simplicityVSAvoidstrap stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces rigid metal straps with flexible straps made of synthetic material that can be bent to small radii without deformation. These flexible straps are integrated with the filter cloth through welding or adhesion, maintaining reliability while enabling easier assembly and disassembly operations.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent creates a composite structure by joining flexible synthetic straps with the filter cloth through welding or adhesive bonding. This composite construction combines the flexibility of synthetic material with the functional requirements of the filter system, eliminating the slipping issues associated with metal straps while maintaining assembly simplicity.

Inventive Principle:

Principle #40Composite materials

2Reliability

If rigid metal straps are used to fix the canvas, then the canvas can be held in position, but the straps cannot be reduced to a diameter smaller than the basket without risk of irreversible deformation

Engineering Contradiction:

Improvecanvas positioningVSAvoidassembly adaptability

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs flexible synthetic straps instead of rigid metal straps, allowing the assembly to be compressed to small diameters for easy insertion into the basket. The flexible material maintains its shape after deformation, enabling reliable canvas positioning without the size constraints of rigid metal components.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If grooves are machined in the basket for braid assembly, then the filter cloth can be fixed securely, but the strength of the basket is reduced and risk of breakage increases

Engineering Contradiction:

Improvefilter cloth fixationVSAvoidbasket strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent removes the grooves from the basket structure entirely, extracting the fixation function from the basket itself. Instead, the flexible straps with integrated attachment points provide the fixation mechanism, preserving the basket's structural integrity and strength while achieving secure filter cloth fixation.

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If operators force-climb braids to fix the filter cloth in grooves, then the assembly is effective, but the process is tedious and time-consuming

Engineering Contradiction:

Improveassembly effectivenessVSAvoidassembly time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The flexible straps are designed with self-tensioning capabilities through integrated attachment points that automatically engage with the filter cloth edges. The straps self-adjust to maintain proper tension and positioning without requiring operators to manually force-climb or adjust components, significantly reducing assembly time while maintaining effective fixation.

Inventive Principle:

Principle #25Self-service

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

Enables rapid and secure fixation of the filter cloth in a wringer basket, reducing assembly time and cost, preventing slipping, and allowing for closer scraping, while being reusable and disposable to prevent cross-contamination.

Implementation Method 1

This basket is driven in rotation around the axis of the cylindrical wall in order to drive the liquid towards the outside of the basket by centrifugation

Methodology Applied

Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

The flexible straps are welded, polyfused or glued to the canvas at several points or continuously

Methodology Applied

Scientific EffectWelding: Welding

Implementation Method 3

The flexible straps are welded, polyfused or glued to the canvas at several points or continuously

Methodology Applied

Scientific EffectPolyfusion:

Data Source

PatentEP1759769B1Filtering device comprising a porous web and at least two maintaning extension hoops

Publication Date: 2009.04.08 SARTORI

Figure 1~3
Figure 4~6
Figure 7~9

AI summary

The device (16) has a filtering sheet (17) applied against a perforated wall of a basket. Two plastic flexible strappings (18, 19) are integrated to the sheet (17) and maintain the sheet in position in the basket. Fixation points between the sheet and strappings maintain the strappings in position with respect to the sheet to avoid all relative movement of the sheet and the strappings irrespective of the fixation in the basket.