Perforating Apparatus with Reciprocating Blade for Nonlinear Weakness Lines
Find Innovative SolutionsGenerate Solutions
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 due to the need for multiple machines for different perforation patterns, and inefficiencies in producing shaped lines of weakness, 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 significant equipment modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a nonlinear shaped line of weakness is provided in web material, then the functionality and versatility of the package is improved, but the equipment cost and complexity increase significantly
Solution Approach 1:
The perforating system is divided into two separate components: a blade with teeth and a counter component with a nonlinear shape. This segmentation allows each component to be simpler in design while collectively achieving the nonlinear perforation pattern, reducing overall equipment complexity while maintaining versatility
Solution Approach 2:
The reciprocally shifting mechanism allows a single perforating apparatus to produce multiple perforation patterns by varying the reciprocation distance and direction. This multi-functionality eliminates the need for multiple specialized machines, reducing equipment complexity while maintaining adaptability for different package designs
2Adaptability or versatility
If a nonlinear shaped line of weakness is provided, then the product design flexibility is improved, but component wear becomes uneven leading to premature replacement
Solution Approach 1:
The system introduces dynamic reciprocation of one component relative to the other during the perforating process. This dynamic movement ensures that different sections of the blade and counter component interact at varying positions and angles, distributing wear more uniformly across both components while maintaining the ability to create various nonlinear perforation patterns
Solution Approach 2:
The reciprocating motion creates a periodic interaction pattern between the blade teeth and counter component. By controlling the reciprocation cycle, the system ensures that each section of the components engages with different portions of the mating surface over time, preventing localized wear concentration and extending component life while preserving design flexibility
3Adaptability or versatility
If multiple machines are used for different perforation patterns, then the adaptability is improved, but the production efficiency and time are reduced
Solution Approach 1:
A single perforating machine is designed with a reciprocating mechanism that can produce multiple perforation patterns by adjusting the reciprocation parameters. This universal machine replaces multiple specialized machines, maintaining adaptability for different perforation patterns while significantly improving production efficiency by eliminating machine changes and setup time
Solution Approach 2:
The dynamic reciprocation mechanism allows the same physical apparatus to adapt its function for different perforation patterns on-the-fly during operation. This eliminates the need for physical reconfiguration or multiple machines, maintaining pattern variety while maximizing continuous production efficiency
4Manufacturing precision
If equipment is frequently replaced for component wear, then the manufacturing precision is maintained, but the loss of time and productivity increase
Solution Approach 1:
The reciprocating motion dynamically distributes the mechanical stress and wear across the entire surface of both the blade and counter component over time. This prevents localized wear concentration that would otherwise require premature replacement, maintaining perforation quality while extending component service life and reducing replacement frequency
Solution Approach 2:
The reciprocation mechanism proactively prevents uneven wear from developing by ensuring all sections of the components engage with varying positions before any single section becomes excessively worn. This preliminary distribution of wear extends the operational life of components while maintaining consistent perforation quality throughout the extended service period
Data Source
AI summary
A perforating apparatus has a base having at least one counter component. The counter component has a length, Lcc, and a nonlinear repeat length. A support is operatively engaged with the base. A blade having a length, LB, is disposed on the support so as to cooperate in interacting relationship with the counter component. The blade has a plurality of teeth. A web material is perforated as it passes between the base and the support and the blade cooperates with the counter component. A drive is associated with one of the support and the base to reciprocally shift the one of the support or the base for a distance, D, in a shifting direction.