Carded Blister Package With Segmented Perforations
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Solution Overview
Problem
Existing child-resistant blister card packages are not adequately tear-resistant and can be easily accessed by young children, while also being difficult for senior citizens to dispense medication from, and there is a need for a more efficient and cost-effective manufacturing process.
Innovation Solution
A carded package design featuring a front card bonded to a rear laminate card with perforations aligned behind blister compartments, where the rear card includes a tear-resistant polymeric layer and paperboard layer, and the perforations are cut using a laser to define paths for tablet dispensing, providing both child-resistant and senior-friendly access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple paperboard layers are heat sealed together to provide child resistance, then child resistance is improved, but the package becomes difficult to dispense from and harder to manufacture
Solution Approach 1:
The rear card is segmented into two distinct layers: a tear-resistant polymeric layer (first layer) and a paperboard layer (second layer). The perforations are strategically positioned to extend through the paperboard layer but stop at the polymeric layer, creating a segmented failure path that requires significant force to penetrate, thus maintaining child resistance while allowing controlled dispensing through the perforated path.
Solution Approach 2:
The package combines dissimilar materials with complementary properties: a tear-resistant polymeric layer provides puncture and tear resistance to prevent child access, while a paperboard layer provides structural support and cost-effectiveness. The laminate structure of these composite materials creates a multi-layer barrier that is difficult for children to penetrate but allows controlled dispensing through laser-cut perforations.
2Reliability
If a tear-resistant polymeric layer is added to the rear card, then child resistance is improved, but manufacturing complexity increases
Solution Approach 1:
Traditional mechanical cutting methods are replaced with laser cutting technology to create perforations through the multi-layer rear card structure. The laser cutting process efficiently penetrates both the paperboard and polymeric layers with precision, eliminating the need for complex mechanical cutting tools and multiple processing steps, thereby reducing manufacturing complexity despite the added material layer.
3Ease of operation
If perforations are cut entirely through the tear-resistant layer, then dispensing is easier, but child resistance is reduced
Solution Approach 1:
The perforations exhibit local quality variation: they extend completely through the paperboard layer (second layer) to define clear dispensing paths, but deliberately stop at the polymeric layer (first layer) without penetrating it. This localized difference in penetration depth creates easy dispensing through the perforated paperboard while the intact polymeric layer maintains child resistance by preventing tearing and puncturing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The package achieves a high level of child resistance, preventing access by young children while allowing easy dispensing by senior citizens, and is cost-effective to manufacture with an efficient assembly process.
Implementation Method 1
the perforations are cut using a laser to define paths for tablet dispensing
Implementation Method 2
a front card bonded to a rear card with a blister card captured and held in a protected condition therebetween
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A carded package (10) includes a front card (16) bonded to a rear card (18) with a blister card (14) captured therebetween. The blister card has upstanding blister compartments (28) projecting through openings (34) of the front card (16). The rear card (18) extends over an opposite face of the blister card (14) and is a laminate including a tear-resistant polymeric layer (38) bonded to a paperboard layer (36). The polymeric layer extends adjacent the blister card (14) and the paperboard layer (36) of the laminate extends remote from the blister card forming an exposed surface (26) of the rear card (18). The rear card includes perforations (40, 46) aligned behind the blister compartments (28). The perforations include a first set of perforations (40, 46) cut entirely through the paperboard and polymeric layers (36, 38) and a second set of perforations (40) cut into the paperboard layer (36) and not into or entirely through the polymeric layer (38). A method of assembling a carded package (10) is also disclosed.