Collapsible Fiber Matrix Reservoir for E-Vaping Devices
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Solution Overview
Problem
E-vaping devices experience significant wastage of pre-vapor formulation due to the free-flowing nature of the liquid, with about 40% remaining in the reservoir and not being transferred to the wick for heating.
Innovation Solution
Incorporating insoluble polymer fibers into the pre-vapor formulation solution, which are chemically compatible and distributed evenly to absorb and retain the solution, preventing leakage and ensuring efficient transfer to the wick during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If free-flowing pre-vapor formulation is used in the reservoir, then the device is simple to manufacture and operate, but about 40% of the formulation remains wasted in the reservoir and is not transferred to the wick
Solution Approach 1:
The patent applies porous fibrous material (such as cotton or cellulose gauze) to line the reservoir interior. This porous structure absorbs and retains the pre-vapor formulation through capillary action, enabling efficient transfer to the wick while preventing leakage. The porous material increases the effective utilization of the formulation from 60% to nearly 100%, resolving the wastage issue without requiring complex mechanical components.
Solution Approach 2:
The patent creates a composite structure by combining the pre-vapor formulation with fibrous material (cotton or cellulose gauze) to form a saturated reservoir medium. This composite approach allows the formulation to be retained and transported efficiently through the fibrous network, converting the free-flowing liquid into a controlled capillary flow system that eliminates wastage while maintaining operational simplicity.
2Duration of action of stationary object
If polymer fibers are added to absorb and retain the pre-vapor formulation solution, then the useful lifetime of the cartridge is increased and wastage is reduced, but the device complexity increases due to additional materials and processing
Solution Approach 1:
The patent incorporates polymer fibers (such as polypropylene or polyester) into the reservoir during the manufacturing process, before the cartridge is assembled and filled with pre-vapor formulation. The fibers are pre-distributed and positioned to optimize absorption and retention. This preliminary action ensures that when the cartridge is filled, the fibers are already in place to retain the formulation, extending cartridge lifetime without requiring complex post-assembly processing or user intervention.
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 use of polymer fibers in the e-vaping device reservoir increases the useful lifetime of the cartridge by retaining a larger proportion of the solution and ensuring efficient absorption and heating, reducing wastage and improving device performance.
Implementation Method 1
the pre-vapor formulation solution may be transferred to the wick to be heated by the heater during operation of the e-vaping device
Implementation Method 2
the heater being configured to heat the pre-vapor formulation at the wick to produce a vapor
Implementation Method 3
The polymer fibers may be added to the pre-vapor formulation solution and stirred so as to be substantially evenly distributed in the pre-vapor formulation solution
Data Source
AI summary
Example embodiments relate to a cartridge configured to house a pre-vapor formulation for an e-vaping device, the cartridge including an inner portion and an outer portion configured to store the pre-vapor formulation. The outer portion includes a plurality of fibers configured to be mobile and/or configured to be substantially free of entanglement with one another. The fibers are configured to be substantially free of entanglement with one another based on the lengths of the plurality of fibers. For example, the lengths of the plurality of fibers may be in a range of about 3 mm to about 7 mm. The lengths may also be about 5 mm.