Plastic Bag Opening Projection with Separating Slit
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Solution Overview
Problem
Existing plastic bag bands make it difficult to easily handle and open individual bags due to sticking layers caused by adhesion or electrostatic charging, which complicates the tearing process.
Innovation Solution
A plastic bag band design featuring a continuous separating slit in the opening projection area, allowing for intuitive gripping and rubbing to separate layers, and a perforation line that extends uninterrupted to facilitate easy tearing without damaging the bottom seam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If individual bags are connected via perforation lines in a plastic bag band, then bags can be torn off sequentially, but the layers of the bag stick together due to adhesion effects and electrostatic charging, making it difficult to open the bag
Solution Approach 1:
The intermediate strip is divided into two functional zones: a perforation line area for tearing the bag off the band, and a separating slit area for separating the bag layers. This segmentation allows each zone to perform its specific function without interference, solving the problem of layers sticking together after tearing.
Solution Approach 2:
The separating slit acts as an intermediary structure between the perforation line and the bag opening. It provides a pre-defined separation path that guides the user to separate the layers cleanly, preventing adhesion and electrostatic charging from causing handling difficulties.
2Adaptability or versatility
If the perforation line is interrupted by a punched-out opening for bin insertion, then the bin can be accessed, but the structure becomes more complex and handling becomes more difficult
Solution Approach 1:
The punched-out opening is merged with the intermediate strip structure, creating a unified element that serves both as a bin access point and as part of the bag separation mechanism. This integration reduces overall structural complexity while maintaining versatility.
3Ease of operation
If tabs protrude into the intermediate area to facilitate tearing, then tearing becomes easier, but the device structure becomes more complex
Solution Approach 1:
Instead of adding complex tab structures throughout the intermediate strip, the invention applies local quality enhancement by creating a separating slit with specific geometric characteristics in the critical area. This localized modification provides sufficient tearing aid without increasing overall structural complexity.
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
Enables easy and intuitive tearing of individual bags from the plastic bag band, reducing the risk of accidentally grabbing both layers and simplifying the handling process, particularly suitable for commercial use by minimizing time delays.
Implementation Method 1
The person can then rub the layers of the bag lying one on top of the other in the area of the opening attachment by a relative movement of thumb and index finger, as a result of which the individual layers are displaced relative to one another.
Implementation Method 2
As a result, the respective layers can easily stick to one another, for example due to adhesion effects and/or electrostatic charging.
Implementation Method 3
As a result, the respective layers can easily stick to one another, for example due to adhesion effects and/or electrostatic charging.
Data Source
Figure 1
AI summary
A plastic bag strip (10) for tearing off individual bags (12, 14) is provided, comprising a first bag (12), wherein the first bag (12) has a bottom seam (16) to form a bag bottom, and a second bag (14), wherein the second bag (14) has an opening edge (26) partially limited by a perforation line (18) for opening the second bag (14), wherein the opening edge (26) of the second bag (14) is connected to the bottom seam (16) of the first bag (12) via an intermediate strip (24) adjoining the bottom seam (16) of the first bag (12) and the perforation line (18) of the second bag (14), wherein the second bag (14) has an opening projection extending from the perforation line (18) of the second bag (14) into the intermediate strip (24) towards the bottom seam (16) of the first bag (12). (28) has the opening projection (28) in the intermediate strip (24) being limited by a continuous separation slot (30).The individual layers of the bag (14) can be pulled apart in the area of the holding attachment (28) by rubbing with the thumb and forefinger, which makes it easy to grasp the respective layer to pull apart the bag (14), thus enabling easy handling of a bag (14) that can be torn off from a plastic bag band (10).