Flexible Package With Tear-Off Lid And Perforation
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Solution Overview
Problem
Existing flexible packages for food products, such as butter and margarine, are difficult to reclose after partial use, tend to become greasy, and lack easy measurement capabilities for precise partial drawing, leading to cumbersome user experiences and shape loss.
Innovation Solution
A single-piece flexible package with a tear-open lid integrated along a perforation line, featuring double-folded side walls and transverse tear-off strips with weight or volume indications, allowing for easy opening, reclosing, and maintaining package cleanliness and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible envelope package is opened for partial product drawing, then the product can be accessed, but the package becomes difficult to reclose and loses its shape
Solution Approach 1:
The package is segmented into a base envelope and a separate lid component connected by a perforation line. The lid can be detached and reattached, allowing the package to be opened and reclosed multiple times while maintaining its shape and structure.
Solution Approach 2:
The lid is designed with dynamic characteristics - it can be detached when opening and reattached when closing. This dynamic component allows the package to transition between open and closed states while preserving its original shape and structural integrity.
2Ease of operation
If the package is opened for partial drawing, then product access is enabled, but the outside of the package becomes greasy
Solution Approach 1:
By separating the lid from the main package body through a perforation line, the design allows the lid to be removed and set aside when opening. This prevents product contact with the exterior surfaces of the package, keeping the outside clean and free from grease.
3Measurement precision
If a single-side weight scale is provided on the package, then partial drawing measurement is enabled, but cutting precision is difficult to achieve
Solution Approach 1:
The lid serves multiple functions: it acts as a cover, provides a measurement scale on its inner surface for accurate weight indication, and facilitates easy opening and closing. This multi-functional design integrates measurement capabilities without compromising ease of use.
4Ease of operation
If a tear-open lid with perforation line is implemented, then easy opening and reclosing is achieved, but the lid structure becomes more complex
Solution Approach 1:
The lid is segmented from the main package body through a perforation line, creating a simple detachable connection. This segmentation enables easy opening and reclosing while maintaining a relatively simple overall structure that can be manufactured efficiently.
Data Source
AI summary
A package (1) manufactured in a single piece of a flexible sheet (2). The package (1) comprises a lid (3) that can be opened and re-closed. The lid (3) is integrated with the package (1). The lid (3) is joined to the package 81) along a perforation line (5). The lid (3) has side walls (7a-d) of double-folded sheet material folded downwards along the perforation line (5) and then folded back upwards. There are cuts (8a, b) in the perforation line (5) in distal opposite ends thereof such that loose lid flaps (11a, b) are provided on each side of the sheet (2) when the package (1) is folded along a longitudinal side, wherein a loose corner (12) is provided in the lid (3). The package (1) comprises a lid (3) that can be opened by a user a first time tearing off the lid (3) from the package (1). The package is provided with transverse tear-off strips (13) arranged around the package (1). The lid can be put back to reclose the package (1), also after partial drawing of the product. A sheet for manufacturing the package and a method for manufacturing said sheet are also disclosed.