Shredder Rotatable Device for Particle Distribution
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Solution Overview
Problem
Conventional shredders face issues with bird nesting and crowning, where shredded particles accumulate unevenly, leading to reduced sheet capacity, potential damage to the cutting assembly, and inaccurate bin full detection, due to the failure of existing solutions to effectively manage particle accumulation within the shredder housing and waste bin.
Innovation Solution
A shredder design incorporating a rotatable device with radially extending structures that pivot to move shredded materials adjacent to the output opening, combined with a fan mechanism to provide forced air, addressing both bird nesting and crowning by dispersing particles evenly and preventing accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If shredded particles are allowed to accumulate in the waste bin, then the bin capacity is utilized, but the particles form a peak or mountain shape (crowning) that pushes against the cutting assembly and triggers false bin full detection
Solution Approach 1:
The patent introduces a rotatable device with radially extending structures that pivot to actively move and redistribute shredded particles within the waste bin. This dynamic mechanism prevents static accumulation patterns (crowning) by continuously redistributing particles, ensuring they settle evenly at the bottom of the bin rather than forming peaks that would trigger false detection signals.
2Productivity
If shredded particles accumulate near the outlet and cutting assembly, then the shredder continues operating, but bird nesting occurs which reduces sheet capacity and may damage the cutting assembly
Solution Approach 1:
The rotatable device with radially extending structures performs preliminary action by actively dispersing shredded particles as they exit the cutting assembly and depositing them evenly into the waste bin. This prevents particles from accumulating near the outlet and cutting assembly before they can form bird nests, thereby protecting the cutting assembly from damage and maintaining sheet capacity.
3Device complexity
If a static waste bin is used, then the structure is simple, but shredded particles accumulate unevenly forming crowning that requires user intervention to redistribute
Solution Approach 1:
The patent implements self-service by equipping the waste bin with a rotatable device that automatically redistributes shredded particles without user intervention. The radially extending structures pivot to move particles evenly across the bin bottom, allowing the system to self-regulate particle distribution and eliminate the need for users to manually redistribute particles or empty the bin prematurely.
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 reduces particle accumulation, extends the lifespan of the shredder, maintains efficient operation, and prevents premature bin full alerts by ensuring even distribution of shredded materials within the waste bin, thus enhancing user safety and convenience.
Implementation Method 1
a fan mechanism to provide forced air towards the output opening to move the shredded material at least adjacent to the output opening
Data Source
AI summary
Disclosed herein is a shredder having a device located at least partially between a shredder mechanism and an output side of the shredder housing to disperse any accumulation of shredded materials at least adjacent the output opening, as well as remove shredded materials caught in or near the cutting assembly. One device is a movable device positioned between a shredder mechanism and the output side of the shredder housing that is configured to pivot about an axis in an oscillating manner. Another device includes a fan mechanism for blowing and moving shredded materials through a passageway in the shredder housing and towards an outlet.