Container Denester Indexing Rods Flange Control
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Solution Overview
Problem
Existing container denesting systems face challenges in efficiently and accurately separating nested clamshell containers, leading to equipment jamming, damage to containers, and potential product loss or contamination, due to inadequate control over the denesting process.
Innovation Solution
A container denester apparatus featuring a frame assembly, indexing assembly with rotating indexing rods, and a drive assembly that positively controls the flanges to individually denest the lowermost container from a stack, spreading the denesting force and preventing damage by rotating the indexing rods between retaining and passing configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional denesting systems are used to separate nested containers, then container separation can be achieved, but container damage occurs (dents, cracks, cuts) and equipment jamming happens due to multiple containers being fed at once
Solution Approach 1:
The denesting apparatus divides the container stack into individual containers through indexed positioning. The indexing assembly with multiple indexing rods (first indexing rod, second indexing rod, etc.) sequentially positions each container at specific locations (first location, second location, third location) to enable controlled individual separation rather than bulk handling, preventing damage from improper separation forces
Solution Approach 2:
The system controls the timing and positioning parameters of container delivery precisely. By using indexed rods that rotate to specific positions and a controlled drive mechanism, the apparatus delivers containers one at a time at controlled intervals to the filling equipment, preventing the harmful effect of multiple containers being fed simultaneously which causes jamming
2Productivity
If force is applied to separate nested containers, then denesting can be achieved, but container damage occurs due to concentrated force on fragile structures
Solution Approach 1:
Multiple indexing rods are distributed around the container stack circumference. Each indexing rod has notches that engage with container flanges at different positions, distributing the separation force across multiple contact points rather than concentrating force on a single point, thereby preventing dents and structural damage
Solution Approach 2:
The indexing rods serve multiple functions: they guide container positioning, apply separation force through notches engaging flanges, and control sequential container release. This multi-functional design enables effective denesting while distributing forces to protect container integrity
3Productivity
If containers are fed to downstream equipment without precise control, then processing can continue, but timing and sequencing errors occur causing equipment jamming or product loss
Solution Approach 1:
The indexing assembly pre-positions containers in a controlled sequence before they reach the filling equipment. The indexed rods rotate to deliver containers one at a time to predetermined locations, ensuring proper timing and sequencing is established before containers enter the filling process, preventing downstream jamming and product loss
Solution Approach 2:
The system uses the mechanical feedback of the indexing mechanism itself - the rotation position of indexing rods, the engagement of notches with container flanges, and the sequential positioning at different locations provide inherent feedback that ensures containers are delivered in the correct sequence and timing to downstream equipment
Data Source
AI summary
A container denester apparatus which overcomes, among other problems, the problems identified above. The denester apparatus positively controls the flanges of the container so as to individually denest a lowermost container from a stack of containers. The apparatus protects the container by spreading the force required to denest the container along much of the flange structure. In addition, the stack of containers above the lowermost container are retained, again along much of the flange structure of the immediately adjacent container.