Beverage Cartridge Guard Element for Stable Filter Piercing
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Solution Overview
Problem
Existing beverage preparation cartridges experience inconsistent brewing due to distortion of the filter and beverage medium caused by the displacement of the filter guard during piercing, leading to increased force requirements and blunting of the piercing element.
Innovation Solution
A cartridge design featuring a separately-formed guard element located within the filtrate volume, configured to prevent the filter from encroaching into the outlet zone, providing physical support to the filter and allowing the piercing element to maintain fluid communication without contacting the guard or filter, thus preventing disturbance of the beverage medium and blunting of the piercing element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter guard is displaced upwardly during piercing, then the piercing element can penetrate the cartridge, but the filter and beverage medium are distorted leading to inconsistent brewing
Solution Approach 1:
The filter guard is pre-configured with a frustoconical shape and positioned to engage the piercing element before actual piercing occurs. This preliminary engagement guides the piercing element and prevents lateral displacement that would distort the filter and beverage medium, thereby maintaining brewing consistency while enabling successful penetration.
Solution Approach 2:
The filter guard acts as an intermediary component between the piercing element and the filter/beverage medium. It absorbs the mechanical stress of piercing and provides a stable interface, preventing direct transmission of disruptive forces to the filter and beverage medium, thus maintaining brewing precision while facilitating piercing operation.
2Reliability
If the piercing element displaces the filter guard to penetrate the cartridge, then the piercing element can establish fluid communication, but increased force is required and the piercing element may become blunted
Solution Approach 1:
The filter guard is designed with a frustoconical shape that changes the mechanical parameters of the piercing interface. The tapered geometry concentrates forces along a controlled path, reducing the total force required for penetration and preventing lateral deflection that would increase force requirements and cause blunting, while reliably establishing fluid communication.
3Ease of operation
If the filter guard is contacted by the piercing element, then the piercing element can penetrate the cartridge, but the filter may be damaged during piercing
Solution Approach 1:
The filter guard is pre-positioned to engage the piercing element before the piercing element contacts the filter. This preliminary engagement creates a protective interface that absorbs piercing forces, allowing the piercing operation to proceed while the filter remains undamaged and maintains its structural integrity.
Data Source
AI summary
A cartridge for preparation of a beverage comprising: a closed container defining a container volume; a filter to divide the container volume into an ingredient chamber volume and a filtrate volume; a beverage medium located in the ingredient chamber volume; and a guard element located in the filtrate volume; wherein the guard element is separately-formed from the closed container and located within the filtrate volume to define an outlet zone, the guard element being interposed between the filter and the outlet zone; wherein the guard element is configured to prevent encroachment of the filter into the outlet zone such that on piercing of a piercing surface of the cartridge by a piercing element of a beverage preparation apparatus the piercing element is enabled to be placed in fluid communication with the outlet zone without the piercing element contacting the guard element or filter. Associated methods and systems are also disclosed.