Plaster Packaging Portico Cut Profile for Opening Force Reduction
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Solution Overview
Problem
Existing fast-opening plaster packagings require significant pulling force to open due to the strength needed to separate semi-wrappers and fold protective films, which can lead to incorrect opening and increased user effort.
Innovation Solution
The protective films are designed with a 'portico' cut profile that guides folding along preset columns, reducing the initial opening strength by minimizing the surface area subjected to folding during the initial opening step and allowing easier detachment of semi-wrappers, with subsequent folding focused on the films themselves once separated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If protective films are directly attached to semi-wrappers with back anchor, then films are securely fixed, but considerable pulling force is required to open the package
Solution Approach 1:
The protective film is segmented into a body portion and a tab portion, with the tab providing a focal point for opening forces. The lip structure segments the attachment mechanism, allowing controlled detachment during opening while maintaining secure fixed during use.
Solution Approach 2:
A lip structure acts as an intermediary element between the protective film and the semi-wrapper. This lip provides a mechanical advantage by creating a folding action that reduces the force needed to detach the film from the adhesive support during package opening.
2Area of stationary object
If protective films have large surface area attached to adhesive support, then films are well protected, but more force is needed to detach films during opening
Solution Approach 1:
The lip is pre-formed on the protective film before packaging, creating a built-in mechanical advantage structure. This preliminary feature enables easier detachment during opening without requiring additional components or increasing the overall film area.
3Strength
If protective films are made rigid for structural support, then films maintain shape, but films resist folding during opening
Solution Approach 1:
The protective film is designed with dynamic characteristics that allow it to transition from a rigid, shape-maintaining state during normal use to a flexible, easily foldable state during opening. The lip structure facilitates this by creating a hinge-like folding action that requires minimal force.
Solution Approach 2:
The protective film utilizes thin film characteristics to achieve both structural support and flexibility. The film's thin construction allows it to maintain shape through its material properties while simultaneously enabling easy folding when activated by the lip structure during package opening.
Data Source
AI summary
The present invention refers to a fast-opening plaster packaging comprising a plaster having at least an adhesive support protected with at least two films (P1, P2) made of protective material and detachable from the adhesive support, and an envelope (E) suitable for containing the plaster. The envelope has at least two portions (E1, E2) mutually dividable and each dividable portion of the envelope is anchored to at least one of the protective films (P1, P2). The packaging is characterized in that at least one of the protective films (P1, P2) has at least a cut (I1, I2) suitable for shaping one or more columns and one or more arcades (LA) or semi-arcades. The column(s) is(are) joined to the corresponding semi-wrapper (E1) at anchoring line (C1) of the protective film (P1) and is(are) able, upon pulling at least one of the portions (E1) of the envelope (E), to fold onto itself(themselves) as such one or more arcades or semi-arcades (LA) made of protective material are substantially not involved into folding.