Self-Opening Bag Pack Uniform Adhesive Edge Bonding
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Solution Overview
Problem
Existing self-opening film bag packs for grocery and produce do not consistently open with uniform force from the first to the last bag, often requiring varying forces and leading to inconsistent bag opening and potential failures.
Innovation Solution
A self-opening wide mouth carryout bag pack design utilizing a uniform non-linear knife cut through the bag walls, which adheres adjacent bags together uniformly, allowing consistent opening with equal force across the pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing self-opening film bag packs are used, then bags can be opened without manual intervention, but the opening force varies significantly from the first to the last bag leading to inconsistent performance
Solution Approach 1:
The patent modifies the physical parameters of the bag pack construction by using a continuous adhesive application pattern along the sealed edges, changing the adhesive distribution parameters to achieve uniform force characteristics throughout the bag pack stack
Solution Approach 2:
The patent applies adhesive specifically at the sealed edges where bags are stacked and connected, creating localized adhesive bonds that provide controlled separation characteristics. The adhesive is applied in specific locations (along the sealed edges) rather than uniformly across the entire bag surface, enabling consistent opening force at the connection points
2Strength
If adhesive is applied to bond bags in the pack, then bags remain securely attached, but varying adhesive distribution causes non-uniform opening forces
Solution Approach 1:
The adhesive is applied to the bag edges before the bags are stacked and sealed together, ensuring proper adhesive distribution and bonding conditions are established in advance of the final bag pack assembly
Solution Approach 2:
The patent changes the adhesive application parameters by using a continuous application pattern along the sealed edges with controlled adhesive量和分布, ensuring uniform adhesive properties throughout the bag pack construction process
Data Source
AI summary
An apparatus for making a self-opening wide mouth bag pack includes a supply of flexible film material. An extruder forms a continuous tube. A flattener flattens the tube. A first sealer forms a bottom seal across a width of the flattened tube. A cutter cuts the flattened tube into bag blanks has a bag mouth at a predetermined distance from the bottom seal. Second and third sealers form angled seals at lower corners of the bag blank forming a flat bottomed bag. An adhesion knife penetrates the bag pack adhering adjacent bag blanks together in the bag pack. An aperture maker forms apertures for suspending the bag pack from a dispensing rack. The pack is attached to the dispensing rack and the front wall of the subsequent bag is adhered to the rear wall of a first bag, thereby causing the first bag to open when pulled from the rack.