Plastic Container Bottom Insert with Annular Sealing Flanges

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Solution Overview

Problem

Existing manufacturing processes for open-top and open-bottom plastic containers often require separate components to be attached and sealed, which can be complex and inefficient.

Innovation Solution

A plastic container design featuring a cylindrical body with a hinge lid and an independent bottom insert member, utilizing annular flange fittings for internal registration and sealing, allowing for a simpler and more efficient manufacturing process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate bottom and body components are attached and sealed together, then container assembly flexibility is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvecontainer assembly flexibilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the bottom attachment and sealing operations into a single integrated injection molding process. The bottom component is molded with integrated attachment features (flanges, ribs, and sealing surfaces) that enable direct formation of the sealed bottom container in one step, eliminating separate attachment and sealing operations while maintaining assembly flexibility

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bottom component serves multiple functions simultaneously: it provides the container base, includes integrated attachment features for joining to the body, and incorporates sealing surfaces for creating the sealed closure. This multi-functionality is achieved through specific geometric features molded into the bottom component

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Productivity

If integral formed containers with attached bottoms are used, then manufacturing steps are reduced, but sealing reliability may be compromised

Engineering Contradiction:

Improvemanufacturing efficiencyVSAvoidsealing reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies local quality by creating specialized sealing surfaces and attachment features at specific locations on the bottom component. The bottom is molded with enhanced local features including flanges with sealing surfaces, reinforcing ribs, and integrated attachment structures that provide reliable sealing and joining at critical locations while maintaining overall manufacturing efficiency

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The sealing and attachment features are pre-formed during the injection molding process itself. The bottom component is molded with pre-formed flanges, sealing surfaces, and attachment structures, so that when the container is assembled, the sealing and joining actions are already optimized and ready, ensuring reliability without adding manufacturing steps

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12319474B2Plastic container and method of manufacture

Publication Date: 2025.06.03 BUCK JEREMIAH

AI summary

A plastic container having a body member and a bottom insert member which are separately molded. The body member is formed with an open top having attached hinge lid and open bottom having a contoured flange engagement surface in its bottom interior wall. The bottom insert member has a pair of annular registration flange elements registerable within the body bottom flange engagement surfaces with a plurality of annular sealing flanges there between with interlocking the bottom insert in sealing relation therewith.