Viscous Condiment Dispenser With Polymer-Coated Paperboard and Heat Sealing
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Solution Overview
Problem
Existing condiment dispensers for viscous materials face issues with material wastage, high manufacturing costs, and moisture absorption leading to package degradation, particularly due to the use of hot melt adhesives which cause steam generation and structural integrity problems.
Innovation Solution
A condiment dispenser with a polymeric-coated paperboard sidewall and valve assembly that uses heat sealing and a steam venting mechanism to reduce hot melt adhesive usage, incorporating a tamper-evident membrane cover and a die-cut design for precise fitting, allowing for efficient dispensing and cost reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hot melt adhesive is used to join container portions, then structural integrity is improved, but steam generation causes bubbles and holes that permit liquid penetration and saturation
Solution Approach 1:
The patent removes the hot melt adhesive from the sealing process entirely. Instead, it uses heat-sealable polymer coatings applied to the paperboard surfaces that bond through direct heat sealing, extracting the harmful adhesive substance while maintaining the joining function.
Solution Approach 2:
The patent changes the bonding mechanism from adhesive-based to heat-seal-based. The polymer-coated paperboard surfaces are heated to activate the seal, changing the physical state and bonding parameters to eliminate steam generation issues associated with hot melt adhesive.
2Ease of manufacture
If material is eliminated from tubes to reduce cost, then manufacturing cost is reduced, but new assembly techniques and manufacturing equipment are required
Solution Approach 1:
The patent uses composite construction with paperboard tube and polymer coatings. This allows the use of lightweight, cost-effective paperboard while the polymer layer provides the necessary sealing and bonding properties, eliminating the need for expensive adhesives and complex assembly equipment.
Solution Approach 2:
The patent replaces mechanical adhesive application systems with a thermal sealing system. The heat sealing process substitutes for the mechanical spreading and bonding of hot melt adhesive, simplifying the manufacturing equipment needed while reducing material costs.
3Ease of manufacture
If paperboard is used for container material, then cost is reduced, but liquid absorption and wicking cause detrimental appearance and package failure
Solution Approach 1:
The patent creates a composite structure where paperboard provides the structural container and polymer coatings provide the liquid barrier. This combination maintains the cost advantages of paperboard while eliminating its liquid absorption weakness through the protective polymer layer.
Solution Approach 2:
The patent uses thin polymer films or coatings applied to the paperboard surface. These flexible polymer layers act as impermeable barriers to liquid penetration while conforming to the paperboard substrate, preventing wicking and absorption without adding significant cost or complexity.
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
The solution effectively minimizes material usage and manufacturing costs while preventing moisture absorption, enhancing the structural integrity and durability of the package by eliminating the need for excessive hot melt adhesive and providing a steam venting mechanism to prevent package saturation.
Implementation Method 1
Preferred materials for the sidewall and a portion of the dispensing valve assembly are paperboard and can have a polymer coating thereon to help effect resistance to penetration by liquids
Implementation Method 2
A steam venting mechanism is provided which may include a vent hole through the mount plate to vent steam generated during heat sealing or hot melt adhesive application
Data Source
AI summary
A dispenser for viscous condiments and a method of making the dispenser are provided. The dispenser includes a tubular sidewall having an end portion with an inward flange. The dispenser includes a dispenser assembly secured to the end portion that has one or more openings. A seal member is attached to the dispenser assembly at the exterior of the end portion. The seal member prevents condiment from exiting the dispenser assembly before the dispenser is ready to use. The seal member includes spaced ear portions projecting outwardly from the perimeter of the seal member. A method for making the dispenser includes forming a web containing a plurality of seal members, die cutting the web so the seal members in the web are connected only at their ear portions, aligning and attaching one of the seal members to a dispenser assembly, and severing the attached seal member from the web.