U-W Shaped Clip Fastener for Film Bag Closure
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Solution Overview
Problem
Existing clip closures for bag-shaped or tubular container systems made from foil are difficult to handle and have limitations in terms of manageability, locking safety, and vulnerability.
Innovation Solution
A clip closure system comprising a U-shaped first closure part and a W-shaped second closure part with a latching lock mechanism, allowing for easy attachment and secure locking without manual holding, featuring a connecting device with latching teeth and pressure medium-adapted indentations for even pressure distribution, and designed for wide compatibility with various film types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional two-part clip closure with retaining cams and rear gripping recesses is used, then the closure provides secure locking, but the device becomes difficult to handle and requires two hands for operation
Solution Approach 1:
The closure device is divided into two separate closure parts (first closure part and second closure part) that can be attached independently to the film section. Each part has simplified structure with fewer components, allowing easy one-handed attachment while maintaining secure locking through the connecting device with latching teeth
Solution Approach 2:
The connecting device with latching teeth enables the two closure parts to lock automatically when brought together, without requiring manual holding or complex manual manipulation. The latching mechanism self-secures the parts in their combined state, improving ease of operation while maintaining reliability
2Reliability
If a clip closure with complex connecting device is used, then locking safety is improved, but the device complexity increases making it vulnerable and difficult to manufacture
Solution Approach 1:
The connecting device is segmented into simple, distributed latching teeth on both closure parts rather than a single complex mechanism. This segmentation simplifies manufacturing while maintaining locking safety through multiple engagement points
Solution Approach 2:
The closure parts are designed as simple, inexpensive components that can be easily manufactured and replaced. The latching teeth provide sufficient locking safety without requiring complex, expensive mechanisms, making the overall device less vulnerable to manufacturing defects
3Adaptability or versatility
If the receiving space is designed to accommodate entire film section, then versatility with various film types is improved, but the cross-sectional area and device complexity increase
Solution Approach 1:
The receiving space of the first closure part is designed with sufficient capacity to accommodate entire film sections of various types. This universal design allows the same closure device to work with different film types and container systems, improving versatility without requiring multiple specialized devices
Solution Approach 2:
The film section is divided into two parts by the two separate closure parts, with the first closure part holding the film section and the second closure part providing compression. This segmentation allows the receiving space to be optimized for versatility while keeping individual component sizes manageable
Data Source
Figure 1
Figure 2~4
Figure 3A~3C
AI summary
The invention relates to a clip closure (1, 2), in particular for closing bag- or tube-shaped container systems made of film, comprising a first closure part (4) and a second closure part (5) corresponding to the first closure part (4). A connecting device arranged on the first closure part (4) and on the second closure part (5) is provided for securing the second closure part (5) to the first closure part (4) in their joined state by force and/or form locking. The first closure part (4) is U-shaped and has two spaced-apart legs (7, 8) between which a receiving space (19) for a film section to be closed is formed. The second closure part (5) is W-shaped and has a central leg (6) and two side legs (9, 10) spaced apart on the outside.A first part of the connecting device is provided on the legs (7, 8) of the first closure part (4), and a second part of the connecting device, corresponding to the first part, is provided on the side legs (9, 10) of the second closure part (5). The invention further relates to an opening tool (41) for opening such a clip closure (1, 2) and a set of clip closures (1, 2) and opening tool (41).