Inhaler Blister Strip Marking and Dose Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inhalers for powder-form inhalation formulations from blister strips lack a simple and compact design with optimized handling and functionality, particularly in terms of marking and dose tracking.
Innovation Solution
The inhaler incorporates a marking device with a self-adhesive tape for numbering blister pockets and a conveyor system that moves the blister strip stepwise, allowing precise and secure indexing, along with a mechanism for automatic actuation and retraction of the piercing member, ensuring accurate dosing and user-friendly operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a marking device with self-adhesive tape is added to number blister pockets, then dose tracking and user identification are improved, but device complexity increases
Solution Approach 1:
The marking device uses a self-adhesive tape that automatically adheres to the blister strip when the mouthpiece cover is opened, eliminating the need for separate marking mechanisms. The tape is drawn from a reel and applied through a guiding element, providing automatic dose numbering without complex control systems
Solution Approach 2:
The marking tape is pre-loaded onto a reel within the mouthpiece cover assembly before use. The guiding element is pre-positioned to direct the tape onto the blister strip at the correct location, ensuring that marking is ready to occur immediately when the cover is opened
2Manufacturing precision
If a conveyor system with indexing mechanism is implemented, then blister pocket positioning precision is improved, but device complexity increases
Solution Approach 1:
The conveyor system replaces complex electronic positioning mechanisms with a simple mechanical reel that winds and unwinds the blister strip. The indexing is achieved through the natural spacing of blister pockets along the strip, eliminating the need for sensors, motors, or complex control circuits
Solution Approach 2:
The mouthpiece cover serves multiple functions: it protects the blister strip, houses the marking tape reel, provides the guiding element for tape application, and acts as part of the conveyor mechanism through its connection to the reel assembly
3Ease of operation
If automatic piercing member actuation is implemented, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The piercing member actuation is merged with the mouthpiece cover opening motion. The same mechanical movement that opens the cover to allow mouthpiece removal also triggers the piercing action through the connection between the cover and piercing member assembly
Solution Approach 2:
The piercing member automatically pierces the blister pocket when the mouthpiece cover is opened, without requiring a separate user action. The system uses the user's natural action of opening the cover to trigger the piercing function
4Reliability
If a mouthpiece cover is added for protection, then reliability is improved, but device complexity increases
Solution Approach 1:
The mouthpiece cover integrates multiple functions: it protects the blister strip from damage and contamination, houses the marking tape reel, provides the guiding element for tape application, and serves as the actuation mechanism for the piercing member through its connection to the conveyor system
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 solution provides a compact, user-friendly inhaler with optimized marking and dose tracking, ensuring precise dosing and preventing unintended opening of blister pockets, enhancing handling and functionality.
Implementation Method 1
The marking device (17) comprises a marked means for fixture (preferably permanent) onto the blister strip (2), the marked means comprising marks for marking the blister strip (2) and/or blister pockets (3)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An inhaler (1) for delivery of a powder-form inhalation formulation from a blister strip (2) with a plurality of blister pockets (3) is proposed. A tape is used for numbering.