Single-Blade Bandsaw Layout for Simultaneous Spaced Cuts

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Solution Overview

Problem

Existing bandsaws require multiple passes or multiple blades to make spaced-apart cuts, leading to inefficiencies and high maintenance and cost issues, particularly when cutting materials like foam for petrochemical plant support blocks.

Innovation Solution

A bandsaw design with dual paths for a single blade, using adjustable wheel configurations to make simultaneous spaced-apart cuts, allowing for parallel or non-parallel cuts in various materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple blades or multiple machines are used to make spaced-apart cuts, then cutting capability is improved, but maintenance cost and blade cost increase significantly

Engineering Contradiction:

Improvecutting capabilityVSAvoidmaintenance cost

Core Design Contradiction:

Adaptability or versatilityVSEase of repair

Solution Approach 1:

The patent combines multiple cutting functions into a single blade by creating two separate cutting paths (upper and lower) that the blade traverses during rotation. The blade makes simultaneous cuts at different heights, effectively merging the functionality of multiple blades into one, thereby reducing blade replacement frequency and maintenance costs while maintaining versatile cutting capability

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single blade is designed to perform multiple cutting functions by following two distinct paths (upper path for first cut, lower path for second cut) at different heights. This multi-functional approach allows one blade to replace what would traditionally require multiple blades or machines, reducing both operational complexity and maintenance requirements

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of repair

If multiple passes are used to make spaced-apart cuts, then blade cost is reduced, but productivity decreases due to time consumption

Engineering Contradiction:

Improveblade costVSAvoidcutting efficiency

Core Design Contradiction:

Ease of repairVSProductivity

Solution Approach 1:

The blade continuously cuts through the material in a single pass by following both the upper and lower paths during its rotation, eliminating the need for multiple passes. The cutting action is continuous and simultaneous at both heights, maximizing productivity while using a single blade, thus resolving the contradiction between blade cost and cutting efficiency

Inventive Principle:

Principle #20Continuity of useful action

3Ease of repair

If a single blade is used for both upper and lower cuts, then maintenance cost decreases, but cutting precision may be compromised due to blade tension and deflection

Engineering Contradiction:

Improvemaintenance costVSAvoidcutting precision

Core Design Contradiction:

Ease of repairVSManufacturing precision

Solution Approach 1:

The cutting path is segmented into two distinct sections (upper path and lower path) that the blade traverses separately during rotation. This segmentation allows each cutting section to be independently optimized for precision while the blade maintains proper tension through the structured wheel arrangement, resolving the contradiction between using a single blade and maintaining cutting precision

Inventive Principle:

Principle #1Segmentation

4Productivity

If the blade follows two spaced-apart paths, then simultaneous cuts are achieved, but device complexity increases due to additional wheels and path control

Engineering Contradiction:

Improvesimultaneous cuttingVSAvoidwheel configuration

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The upper and lower cutting paths are positioned asymmetrically at different heights, with the upper path for the first cut and the lower path for the second cut. This asymmetric arrangement enables simultaneous cuts at different levels while using a single blade, achieving high productivity without requiring symmetric complexity in the wheel configuration

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS12447541B2Bandsaw operative to make simultaneous spaced-apart cuts with a single blade

Publication Date: 2025.10.21 ROSE RICHARD O

AI summary

A bandsaw makes simultaneous, spaced-apart cuts in hard or soft materials with a single bandsaw blade. The invention is ideally suited to cutting spaced-apart parallel surfaces to form support blocks, however, different embodiment may be controlled or programmed to make parallel or non-parallel cuts at varying angles. The single bandsaw blade rides on circular wheels on both sides of a gap or passageway, such that a first portion of the blade crosses the passage along a first, upper path, and a second portion of the bandsaw blade crosses the passage along a second, lower path. A table moves the material through the passage, whereupon the material is simultaneously cut along two planes corresponding to the upper and lower paths of the bandsaw blade. A preferred embodiment includes a first set of upper and lower wheels on one side of the passage, and a second set of upper and lower wheels on an opposing side of the passage.