Bag Holder With Rectangular Retaining Bar

Solution Overview

Problem

Existing bag holders are complex, prone to wear and tear, and limited in weight capacity due to small surface area retention, making them unsuitable for various types of bags and potentially causing bag tearing.

Innovation Solution

A bag holder with a rectangular retaining bar and a complementary channel mounting bracket, allowing the bag rim to be rolled around the bar for secure support, reducing the likelihood of tearing and distributing weight evenly, while being easily adaptable for different bag sizes and strengths.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If retaining clips and tabs are used to hold the bag, then the bag can be held in position, but the device becomes complex and the weight capacity is limited due to small surface area retention

Engineering Contradiction:

Improveweight capacityVSAvoidcomplex construction

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The bag holder is divided into two separate components: a retaining bar and a mounting bracket. The retaining bar is a simple cylindrical element that contacts the bag, while the mounting bracket contains the complexity of the mounting mechanism. This segmentation allows the retaining bar to have a large surface area for weight support without adding complexity to the retention mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The complex retaining mechanism (clips and tabs) is extracted and replaced with a simple cylindrical retaining bar. The complexity is moved to the mounting bracket, which is a separate component. This extraction simplifies the bag-retention interface while maintaining mounting functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If retaining clips and tabs are used to hold the bag, then the bag can be held in position, but the clips and tabs are subject to wear and tear and breakage over time

Engineering Contradiction:

ImprovedurabilityVSAvoidprone to breakage

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The retaining bar is designed as a simple, replaceable component with no moving parts. If it becomes worn or damaged, it can be easily replaced by removing it from the mounting bracket and inserting a new one, without requiring complex disassembly or repair procedures.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If a complex set of retaining clips and tabs are used, then the bag can be held, but only a relatively small portion of the surface area of the bag is held, limiting weight capacity

Engineering Contradiction:

Improveweight capacityVSAvoidsurface area held

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The bag holder is divided into two separate components: a retaining bar and a mounting bracket. The retaining bar is a simple cylindrical element that contacts the bag, while the mounting bracket contains the complexity of the mounting mechanism. This segmentation allows the retaining bar to have a large surface area for weight support without adding complexity to the retention mechanism.

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If detents and tabs are used to attach spread bar members, then the members can be snapped together, but the device is difficult to operate and may result in breakage

Engineering Contradiction:

Improveassembly capabilityVSAvoiddifficulty of operation

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The complex retaining mechanism (clips and tabs) is extracted and replaced with a simple cylindrical retaining bar. The complexity is moved to the mounting bracket, which is a separate component. This extraction simplifies the bag-retention interface while maintaining mounting functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

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 provides a robust, adaptable, and tear-resistant bag holder that can support varying weights without damaging the bag, facilitating easy article deposition and retrieval, and can be mounted on vertical surfaces for convenience.

Implementation Method 1

The channel portion is configured to prevent (or at least substantially reduce) the retaining bar from rolling within the channel portion when retaining bar is inserted within the channel portion.

Methodology Applied

Scientific EffectGeometric constraint: Geometry

Implementation Method 2

the weight of the bag is distributed along an upper surface of the retaining bar and thereby reduces contact between the bag and the lip

Methodology Applied

Scientific EffectWeight distribution: Gravitation

Data Source

PatentUS9150322B2Bag holder

Publication Date: 2015.10.06 FITZPATRICK MARK BERNARD

AI summary

A novel bag holder is provided. In an embodiment, the bag holder includes a retaining bar that is shaped like a rectangular box. The bag holder also includes a wall bracket having a channel portion complementary to the shape of said retaining bar. The wall bracket can be mounted to vertical surface such as a wall. A portion of the rim of a plastic bag can be rolled around the retaining bar. Then, the retaining bar with the bag can be inserted into channel portion thereby securing the bag and facilitating the depositing and withdrawal of articles from the bag opening.