Tri-fold Plastic Bag Roll With Chisel Cut Dispensing
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Solution Overview
Problem
Existing plastic and film bags for fresh produce are not efficiently stored or dispensed from compact rolls, lacking features for easy opening and use, and previous designs do not fully address the need for compact storage and easy dispensing.
Innovation Solution
A tri-fold film bag design that includes a continuous web of plastic or other film material, with front and rear walls sealed at the bottom edges, a perforation line for easy separation, and optional features like chisel cuts, gussets, corona treatment, and printing, allowing for compact rolling and easy opening, and the use of a bag dispenser system that engages the chisel cut for smooth dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If plastic bags are made in large sizes for fresh produce, then the bags can accommodate more goods, but the storage space required increases and shelf space is consumed
Solution Approach 1:
The patent applies nesting by folding large plastic bags into compact sizes that can be stored within smaller dispensers. The tri-fold design allows large produce bags to be collapsed and nested within a small footprint dispenser unit, enabling large bag capacity while minimizing shelf space occupation.
Solution Approach 2:
The patent transforms the storage problem by changing from two-dimensional flat bag storage to three-dimensional rolled/nested storage. The bags are folded and rolled to create a compact cylindrical form factor that utilizes vertical space and depth rather than only horizontal shelf area.
2Area of stationary object
If plastic bags are folded into compact rolls for space-efficient storage, then shelf space is reduced, but the bags become difficult to open and dispense
Solution Approach 1:
The patent applies preliminary action by pre-forming tear notches and perforation lines on the folded bags before they are rolled into compact dispensers. These pre-prepared features enable easy bag separation and opening without requiring the consumer to manually fold or tear the compact rolled bags, thus maintaining ease of operation despite the compact storage form.
Solution Approach 2:
The patent segments the bag structure by incorporating perforation lines and tear notches that divide the continuous rolled material into individual usable portions. This segmentation allows bags to be easily separated from the roll at predetermined locations, making dispensing simple despite the compact nested storage configuration.
3Area of stationary object
If multiple folds are created to achieve compact rolling, then the roll size is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies local quality by creating folds and creases at specific locations on the bag rather than uniform folding throughout. The tri-fold design concentrates folding actions at three predetermined locations, and the perforation lines are placed at specific positions to facilitate easy separation. This localized approach simplifies the overall folding mechanism compared to complex multi-step folding processes.
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 tri-fold design enables efficient storage and easy dispensing of large size produce bags from compact rolls, ensuring easy opening and use, while the dispenser system facilitates smooth bag separation and use of space, addressing the limitations of prior art.
Implementation Method 1
optional features like chisel cuts, gussets, corona treatment, and printing
Data Source
AI summary
A plastic or other film bag is formed from a continuous extruded tube. The tube is flattened and sealed across its width at intervals to form bag bottoms. The bags are joined to one another at a perforation line and folded in thirds lengthwise prior to being rolled into a compact roll, either with or without supporting core. After folding the bags may be chisel cut through the center of the perforation line to assist in dispensing of the bags. The chisel cut will extend through all layers of the bag when folded, resulting in three chisel cuts in the bag. The bags may be gusseted for part or as much as all of their width. The bags may also be corona treated and printed on their outer surfaces. The bags may be formed from partially recycled materials and various combinations of linear low density, medium and high density polyethylene.