Spice Jar Grinder with Frangible Tab for Recyclable Separation
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Solution Overview
Problem
Existing spice jar grinders are difficult to separate from the jar for recycling due to permanent attachment methods like pressure coupling or threading, preventing effective recycling of different materials.
Innovation Solution
Incorporation of frangible tabs on the static part of the grinder, allowing manual separation by tearing off a locking mechanism, enabling independent recycling of glass and plastic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If locking means are used to permanently attach the grinder to the jar mouth, then the reliability of the attachment is improved, but the ease of separation for recycling deteriorates
Solution Approach 1:
The locking means are segmented into a fixed portion attached to the jar mouth and a frangible tab portion attached to the grinder. This segmentation allows the locking function to be separated from the retention function, enabling reliable attachment during use while allowing easy separation when needed by breaking only the frangible tab portion.
Solution Approach 2:
The frangible tab is pre-configured with a predetermined break point that is designed to fail at a specific location. This preliminary action ensures that when force is applied during separation, the tab will break at the intended point rather than causing damage to other components, facilitating clean separation for recycling.
2Ease of operation
If frangible tabs with predetermined break points are used, then the ease of separation for recycling is improved, but the structural strength of the locking mechanism deteriorates
Solution Approach 1:
The frangible tab is designed with non-uniform structural properties: the majority of the tab maintains sufficient strength for normal operation and attachment, while a specific localized region (the predetermined break point) is weakened through design features such as reduced thickness or geometric discontinuities. This local quality differentiation ensures the tab is strong where needed and weak where separation is desired.
Solution Approach 2:
The frangible tab is designed as a disposable component that is intended to be broken and discarded during the separation process. By concentrating the structural weakness in a small, inexpensive tab rather than in the main locking mechanism, the overall strength of the attachment system is preserved while enabling easy separation when the product is exhausted.
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
Facilitates 100% assembly recyclability by allowing separation of the grinder from the jar, ensuring proper recycling of both materials.
Implementation Method 1
the adaptation neck that emerges from the lower portion of the static part of the grinding mechanism includes projections that fit, by elastic deformation, into a perimeter flange of the mouth of said jar
Implementation Method 2
the tab can be torn off, thereby allowing to separate and therefore unlock the mentioned locking means
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention discloses a grinder for spice jars that is made up of a static part attached to the mouth of the jar and on which an actuator is arranged. The static part is provided with a frangible tab in which locking means for locking the static part on the mouth of the jar are arranged therein. Advantageously, the defined configuration allows the grinder itself to be separated from the jar to which it is attached, in order to facilitate the tasks of separately recycling the different materials that make up the jar, once the product contained therein has been used up. The claimed invention is of special interest given its use in both snap-fit grinders and grinders that are screwed on the mouth of the jar.