Packaging Bag Inclined Sealed Edge Unsealing Guide
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Solution Overview
Problem
Conventional packaging bags face difficulties in easy unsealing and separation, particularly when containing viscous contents like retort curry, leading to adherence of contents to broken pieces and potential splashing during separation.
Innovation Solution
The packaging bag design incorporates inclined unsealing guide lines on both the front and back films that converge to the same point on the inner edge of the sealed part, allowing for easy separation with minimal force and preventing content splashing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the break lines of the front film and back film are misaligned vertically during unsealing, then the unsealing process can start, but a large force is required to peel off the heat-sealed part and separate the broken piece
Solution Approach 1:
The patent applies preliminary action by pre-forming notches at both the start and terminal sides of the sealed part before unsealing occurs. These notches create predetermined break lines that guide the separation process, ensuring that the break lines of the front film and back film align properly during unsealing. This preliminary structural preparation eliminates the need for large peeling forces that would otherwise be required to separate misaligned break lines.
2Productivity
If the broken piece remains without being separated after unsealing, then the unsealing is complete, but the contents adhered to the broken piece may adhere to the hands when taking out the contents
Solution Approach 1:
The patent applies segmentation by creating a complete separation of the broken piece from the main packaging body through properly aligned break lines that extend through both the front film and back film. The notches at both ends of the sealed part ensure that the break lines connect continuously, dividing the packaging into separable segments. This complete segmentation allows the broken piece to be easily removed without leaving remnants that would cause contents to adhere to hands.
3Ease of operation
If the broken piece is forcibly torn off to separate it, then the broken piece can be removed, but the contents adhered to the broken piece may splash around accidentally
Solution Approach 1:
The patent applies preliminary action by pre-forming notches that create controlled break lines extending through both films. These pre-established break paths guide the separation process, allowing the broken piece to be removed through simple pulling motion rather than forcible tearing. The controlled separation path prevents sudden movements that would cause contents to splash, while still achieving complete separation of the broken piece.
Data Source
AI summary
Provided is a packaging bag (1) in which a broken piece can be separated easily at the time of unsealing. In a packaging bag (1) in which unsealing is conducted from a sealed part (2) on an unsealing start side to a sealed part (4) on an unsealing terminal side via an accommodation part (3), an easily-openable part (10) is provided at the sealed part (2) on the unsealing start side, and an inner edge of the sealed part (4) on the unsealing terminal side is an inner edge inclined part (5u) that crosses an unsealing virtual straight line (12) linearly drawn in an unsealing direction from the easily-openable part (10) to the sealed part (4) on the unsealing terminal side via the accommodation part (3), and is inclined relative to the unsealing virtual straight line (12).