Bag Catch Assembly for Bulk Container Retention

Solution Overview

Problem

Existing bulk containers with internal bags face challenges in keeping the bag open during filling and attached during emptying, leading to inefficiencies and product contamination.

Innovation Solution

A single-piece cellulose-based container blank with a bag catch assembly that includes a V-shaped cut line and retainer slit, allowing the bag to be locked in place using a bag catch tab, ensuring the bag remains open during filling and attached to the container during emptying.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a simple bag-container combination is used, then device complexity is reduced, but the bag cannot be kept open during filling or attached during emptying

Engineering Contradiction:

Improvestructure complexityVSAvoidbag retention

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The container wall is segmented into multiple functional zones: an engagement zone with recesses and protrusions for bag attachment, a middle zone for bag passage, and a lower zone with retention features. This segmentation allows each zone to perform its specific function while maintaining overall structural integrity and simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The container wall itself acts as an intermediary mechanism between the bag and the filling/emptying processes. The engagement zone with its recesses and protrusions serves as a mediator that mechanically connects the bag to the container, preventing both detachment during emptying and closure during filling without requiring additional complex components.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If no bag retention mechanism is used, then ease of manufacture is improved, but time is lost reopening bags during filling

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidbag reopening time

Core Design Contradiction:

Ease of manufactureVSLoss of time

Solution Approach 1:

The bag is pre-positioned and engaged with the container wall's engagement zone before the filling process begins. The recesses and protrusions are designed to automatically secure the bag in an open, positioned state during filling, eliminating the need for time-consuming manual reopening operations while maintaining manufacturing simplicity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The container structure provides self-service bag retention through its integrated engagement zone. The recesses and protrusions automatically maintain the bag in the correct position and open state during filling operations, eliminating the need for external intervention or complex additional mechanisms, thus saving time without complicating manufacturing.

Inventive Principle:

Principle #25Self-service

3Device complexity

If no bag attachment mechanism is used, then device complexity is reduced, but product contamination occurs when bag separates

Engineering Contradiction:

Improveattachment mechanism complexityVSAvoidproduct contamination

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The container wall is segmented into multiple functional zones: an engagement zone with recesses and protrusions for bag attachment, a middle zone for bag passage, and a lower zone with retention features. This segmentation allows each zone to perform its specific function while maintaining overall structural integrity and simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The container wall itself acts as an intermediary mechanism between the bag and the filling/emptying processes. The engagement zone with its recesses and protrusions serves as a mediator that mechanically connects the bag to the container, preventing both detachment during emptying and closure during filling without requiring additional complex components.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS7398913B2Combo bin bag catch and method of use

Publication Date: 2008.07.15 INT PAPER CO

AI summary

The present invention is useful with any variety of bulk container designs that incorporate an internal bag within the container. The present invention uses a simple structure formed in the side walls of the container that will not only hold the bag open within the container during filling, but will also keep the bag attached to the container when the container in emptied. The bag catch assembly includes various cut lines that define a bag catch tab. Additionally another cut line(s) forms a bag retainer slit.