Variable-Rate Conveyor Screening for Unstable, Non-Conveyable Items

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Solution Overview

Problem

Material handling systems face challenges in handling items with varying shapes, sizes, and orientations, leading to issues such as jams, equipment damage, and product damage due to unstable items.

Innovation Solution

A system and method that assesses the conveyability of items using a variable rate conveyor system and sensors to measure contact region dimensions at different conveyance rates, diverting unstable items to safe handling systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a standard material handling conveyor system is used to transport all items, then the system can handle a wide variety of items, but unstable or oddly shaped items cause jams, equipment damage, and product damage

Engineering Contradiction:

Improveability to handle varying shapes, sizes, and orientationsVSAvoidjams, equipment damage, and product damage

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary assessment of item stability before items enter the main conveyance system. A variable rate conveyor system tests items under different acceleration conditions (constant, accelerating, decelerating rates) and measures contact region dimensions to identify non-conveyable items in advance, preventing them from causing jams or damage in the primary system.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

An intermediary assessment conveyor system is introduced between the item source and the primary conveyance system. This intermediate system acts as a filter, evaluating item stability through variable rate conveyance and sensor measurements, and diverting unstable items before they reach the main system.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the conveyor system operates at varying rates to assess item stability, then non-conveyable items can be identified, but the system complexity increases

Engineering Contradiction:

Improveidentification of non-conveyable itemsVSAvoidvariable rate conveyor system with multiple sensors

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The assessment conveyor system performs multiple functions using a single integrated setup. The same variable rate conveyor and sensor system is used to test items under different acceleration conditions and measure contact region dimensions, eliminating the need for separate testing equipment for each parameter.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system combines the conveyance function with the assessment function in a single integrated system. The variable rate conveyor both transports items and simultaneously tests their stability, while sensors measure both position and contact region dimensions during the same operation, reducing overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12365548B2System and method for identifying and transporting non-conveyable items

Publication Date: 2025.07.22 DEMATIC CORP

AI summary

An assessment system and method are provided for determining whether an item handled in a material handling system is stable and conveyable or unstable and non-conveyable. If an item is deemed non-conveyable, it is diverted or otherwise removed from the material handling system before it is transported downstream where it may affect the operation of the system or cause damage to the system and/or item. The system utilizes a dimension sensor system, such as including photo arrays, to measure contact region dimensions between an item being conveyed and the conveyor surface. The contact region is observed under constant conveyance rates, accelerating conveyance rates, and decelerating conveyance rates to determine whether the item orientation changes due to shifts in momentum. Any measured contact region changes are compared to a maximum allowed value, and if the measured change is greater than the maximum, the item is deemed non-conveyable.