Pressure Relief Valve Applicator for Packaging
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Solution Overview
Problem
There is a need for a low-cost, self-contained, table-top system to apply adhesive-backed pressure relief valves to packaging in small volume, semi-automatic operations, as existing automated systems are costly and complex, making them unsuitable for small packagers.
Innovation Solution
A system comprising a series of rollers, a peeler bar, an electro-mechanical micro-switch, a valve applicator unit with a punch and applicator vacuum head, and a liner retraction unit, which allows for the manual application of adhesive-backed pressure relief valves to packaging, using a supply reel and tensioning mechanism to manage the liner carrying the valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an automated system with base unit, guide rollers, electronic and pneumatic components is used, then valve application efficiency and precision are improved, but system cost and complexity increase significantly
Solution Approach 1:
The patent extracts and removes complex electronic and pneumatic components from the automated system, retaining only the essential mechanical elements (applicator head, punch, peeler bar, rollers) needed for valve application. This simplification maintains core functionality while dramatically reducing system complexity and cost for small-volume operations.
Solution Approach 2:
Instead of using a complex automated system that removes valves from a continuous liner, the patent inverts the approach by using a simple manual feed system where individual pre-cut valves are manually placed and applied. This reversal of the automated removal process eliminates the need for complex liner management systems.
2Manufacturing precision
If a full automated valve application system is implemented, then application precision and registration are improved, but initial investment cost increases
Solution Approach 1:
The patent employs simple, inexpensive mechanical components that can be easily manufactured and replaced if needed. The applicator head, punch, and peeler bar are basic mechanical elements that provide sufficient precision for small-volume operations without requiring expensive automated positioning systems.
Solution Approach 2:
The system uses the operator's manual dexterity and visual alignment capabilities to achieve proper valve positioning and registration. The mechanical components are designed to work with human operation, allowing the operator to naturally align and apply valves accurately without complex automated guidance systems.
3Device complexity
If manual application of pressure relief valves is performed, then system cost and complexity are reduced, but application time and labor intensity increase
Solution Approach 1:
Valves are pre-cut and pre-prepared on the liner before manual application. This preliminary preparation of individual valves eliminates the need for the operator to manually cut or prepare each valve during the application process, reducing application time while maintaining system simplicity.
Solution Approach 2:
The patent combines multiple functions into simple integrated mechanical components. The applicator head integrates the punch, peeler bar, and valve placement functions in a single unit that can be operated with one hand, reducing the number of separate tools and steps required for manual valve application.
4Strength
If adhesive-backed pressure relief valves are used, then valve securing to packaging is improved, but risk of premature adhesion to liner increases
Solution Approach 1:
The punch creates an opening in the packaging and removes any release coating or protective layer from the valve's adhesive surface before the valve contacts the packaging. This preliminary action ensures that the adhesive is activated only at the moment of application, preventing premature adhesion to the liner while ensuring strong bonding to the packaging.
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 efficient and cost-effective application of pressure relief valves to packaging, reducing mechanical complexity and power requirements, suitable for small volume operations, while maintaining the freshness of products like coffee by allowing immediate packaging post-roasting and grinding.
Implementation Method 1
an applicator shaft with an applicator vacuum head mounted at one end
Data Source
AI summary
A system for applying pressure relief valves to packaging from a liner carrying adhesive backed pressure relief valves passing over a series of rollers in tension onto a peeler bar. There is a valve applicator unit proximate the peeler bar with a punch shaft and an applicator shaft with an applicator vacuum head. The liner is moved by a retraction unit including clamping members that alternately maintain the liner stationary under tension and pull the liner under tension to advance the liner carrying adhesive backed pressure relief valves. A supply reel for a roll of liner carrying adhesive backed pressure relief valves has a pair of spaced apart plates and a pair of rings with a non-stick coating positioned between each of the plates and the roll of liner. The plates, rings and roll of liner are compressed together by an adjustable retainer.