Three-Sided Bag Rack for Erect Filling of Plastic T-Shirt Bags
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Plastic grocery bags are underutilized and lead to significant waste due to their weak structure and inability to maintain an erect shape during filling, resulting in premature bag switching and reduced item capacity, which is exacerbated by high turnover among part-time baggers in retail settings.
Innovation Solution
A three-sided bag rack and packing system with handles that creates a defined physical frame for plastic grocery bags, allowing for efficient filling and maintaining an erect shape, similar to paper bags, thereby increasing item capacity and reducing bag waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic grocery bags are used instead of paper bags, then cost is reduced, but bag strength and structural stability deteriorate
Solution Approach 1:
The support structure is divided into multiple components: a reservoir bag holder for storing bags, a three-sided bag rack with side supports and intermediate back support, and forward upper tabs that extend beyond the rack. This segmentation allows each component to perform its specific function - storage, support, and shape definition - thereby maintaining bag strength through distributed structural support.
Solution Approach 2:
The three-sided bag rack acts as an intermediary structure between the bagger and the plastic grocery bag. It provides the necessary support and shape definition during the filling process, compensating for the inherent weakness of plastic bags. The rack temporarily assumes the structural role that would otherwise need to be provided by the bag itself.
2Ease of manufacture
If plastic grocery bags are used instead of paper bags, then cost is reduced, but ability to maintain erect shape deteriorates
Solution Approach 1:
The forward upper tabs of the side supports extend beyond the three-sided bag rack to a specific location where the bag handles rest. This local extension creates a defined physical frame at the critical upper portion of the bag, providing shape definition exactly where needed to maintain an erect appearance during filling, while the rest of the structure remains flexible.
Solution Approach 2:
The invention adds a spatial dimension to the filling process by creating a three-dimensional physical frame using the three-sided bag rack with extended tabs. This frame structure imposes a specific geometric configuration on the bag, transforming it from a floppy two-dimensional surface into a structured three-dimensional form that maintains its shape.
3Ease of operation
If conventional wire-arm bag racks are used, then bag dispensing is simplified, but bag filling efficiency deteriorates
Solution Approach 1:
The three-sided bag rack with forward upper tabs serves multiple functions: it holds the bag handles (like conventional racks), supports the bag during filling, and defines the bag's physical frame to maintain shape. This multi-functionality combines the dispensing simplicity of conventional racks with the shape-maintenance benefits of structured supports, thereby improving filling efficiency without sacrificing ease of operation.
4Reliability
If plastic grocery bags are underfilled, then bag strength limitations are avoided, but item capacity is reduced
Solution Approach 1:
The three-sided bag rack with extended forward upper tabs is set up in advance to provide the proper physical frame before filling begins. This preliminary structural arrangement allows the bag to maintain its shape and support heavier loads throughout the filling process, enabling baggers to fill bags to complete capacity without exceeding the bag's strength limitations.
Data Source
AI summary
A bag rack and packing system for a plastic grocery bag having a pair of handles has a base to which is connected (1) a three-sided rack having a reservoir bag holder for plastic bags and two arms and (2) a three-sided support having two side supports and an intermediate back support, with each of the side supports having a forward upper tab close to the three-sided rack, an intermediate top and then a rearward edge. The three-sided rack and three-sided support have open faces that face each other so that the three-sided support temporarily creates a defined physical frame for a first plastic grocery bag when its handles are secured over the forward upper tabs of the two side supports. The forward upper tabs help separate an individual bag from a reservoir of bags and the individual bag may remain attached to, or be detached from, the reservoir of bags as it is being filled.