Perforating Apparatus with Reciprocally Shifting Blade
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Solution Overview
Problem
Existing perforating apparatuses for creating nonlinear lines of weakness in web materials face challenges such as uneven wear of components, increased equipment costs, and the need for multiple machines to produce different perforation patterns, leading to premature equipment replacement and production delays.
Innovation Solution
A perforating apparatus with interacting components, including a blade with teeth and a counter component with a nonlinear shape, where one component is reciprocally shifted to cover the full width of the nonlinear shape, minimizing uneven wear and allowing for various perforation patterns without equipment modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If nonlinear lines of weakness are provided in web materials, then product functionality and design flexibility are improved, but component wear becomes uneven and equipment lifespan decreases
Solution Approach 1:
The patent applies the dynamics principle by making the perforating blade reciprocally shift during rotation. Instead of a static blade position, the blade dynamically adjusts its position to reciprocally shift across the width of the nonlinear shape, ensuring uniform wear distribution. This dynamic adjustment allows the blade to interact with different sections of the nonlinear shape at varying angles, preventing localized wear concentration and extending equipment lifespan while maintaining design flexibility for nonlinear lines of weakness.
2Ease of manufacture
If shaped lines of perforations are created with fixed blade and counterpart, then manufacturing capability is achieved, but uneven wear occurs requiring premature replacement
Solution Approach 1:
The invention transforms the static manufacturing setup into a dynamic system where the blade reciprocally shifts during operation. This dynamic mechanism enables the creation of shaped lines of perforations while distributing wear uniformly across the blade and counterpart surfaces. By incorporating reciprocal shifting, the system maintains manufacturing capability for various shapes without requiring frequent repairs or premature replacement of worn components.
3Adaptability or versatility
If multiple product lines require different perforation patterns, then product diversity is achieved, but equipment complexity and costs increase
Solution Approach 1:
The patent applies the universality principle by designing a single perforating apparatus capable of producing multiple perforation patterns through reciprocal shifting. The blade mechanism can reciprocally shift to create straight lines, nonlinear shapes, and various perforation patterns without requiring separate equipment or major modifications. This multi-functional capability allows one apparatus to serve multiple product lines, reducing equipment complexity and costs while maintaining product diversity.
4Adaptability or versatility
If nonlinear shapes are helixed or three-dimensionally shaped, then design versatility is improved, but angle variation causes severe uneven wear
Solution Approach 1:
The invention addresses the wear uniformity issue by implementing reciprocal shifting that dynamically compensates for angle variations in helixed or three-dimensionally shaped nonlinear forms. As the blade reciprocally shifts, it adjusts its position to maintain more uniform interaction angles with different sections of the complex shape, thereby distributing wear more evenly across the blade and counterpart surfaces while preserving design versatility for complex geometries.
Data Source
AI summary
A perforating apparatus may have a first roll comprising a first design and a second roll comprising a second design, each roll being in close proximity with a support member and each roll comprising a blade or an anvil. A web material may travel a first path between the first roll and the support member or, alternatively, may travel a second path between the second roll and the support member.