Sterile Vial Capping Device Head-Only Contact Mechanism
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Solution Overview
Problem
Capping devices for vials, especially those used in pharmaceutical applications, fail to maintain the sterility of mushroom-shaped caps during the capping process due to non-sterile surfaces coming into contact with the inserting portions, compromising the internal sterility of the vials.
Innovation Solution
A capping device that picks up and applies caps only by the head portion, ensuring the inserting portion remains sterile by avoiding contact with non-sterile surfaces, utilizing a pick-up zone and conveyor means that contact only the head portion of the caps, and a pick-up and inserting mechanism that inserts the cap into the vial without compromising its sterility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional capping devices are used to pick up and apply caps, then the capping operation can be performed, but the inserting portion of the caps contacts non-sterile surfaces of the device, causing loss of sterility
Solution Approach 1:
The cap is divided into two distinct functional portions: a head portion that contacts the capping device surfaces, and an inserting portion that enters the vial. This segmentation allows each portion to serve its specific function while protecting the sterility-critical inserting portion from contamination.
Solution Approach 2:
The harmful contact between the inserting portion and device surfaces is eliminated by extracting the contact function to the head portion only. The inserting portion is effectively removed from the contamination pathway, allowing it to maintain sterility throughout the capping operation.
2Reliability
If laminar flows of sterile air are used to sterilize the inserting portion, then sterility can be achieved, but contact with non-sterile device surfaces immediately compromises this sterility
Solution Approach 1:
The cap's inserting portion is pre-sterilized before entering the capping device. The device geometry is designed so that this pre-established sterility is preserved throughout the capping operation by preventing any contact with non-sterile surfaces during the process.
Solution Approach 2:
The head portion acts as an intermediary that absorbs all contact with device surfaces, protecting the inserting portion from contamination. This mediator function ensures that the sterility of the inserting portion is maintained even during prolonged device interaction.
3Ease of operation
If the capping device contacts the inserting portion during handling, then the capping operation can proceed, but the sterility of the inserting portion is compromised
Solution Approach 1:
Different portions of the cap have different functional qualities: the head portion is designed for contact and manipulation, while the inserting portion is designed for sterility and vial insertion. This local differentiation allows the device to operate effectively while preserving sterility where it is most critical.
Data Source
AI summary
A capping device for capping vials borne by a respective conveyor (101), with caps (3) which include an inserting portion (31), shaped for insertion into a mouth of the vial (2) and a head portion (32), which remains externally on the vial (2) after capping. The capping device (1) includes a pick-up zone (12) configured for supporting and containing the caps (3) to be picked up by contacting only the head portion (32) thereof, a conveyor (11) for supplying caps (3) to the pick-up zone (12), configured to carry the caps (3) by contacting only a head portion (32) thereof; and a pick-up and inserting device (13) configured and activatable for picking up at least one cap (3) at a time from the pick-up zone (12), contacting only the head portion (31), and for holding the cap only by the head portion (302) while transporting the cap to a respective vial (2), and then inserting at least a part of the inserting portion (301) into the mouth of the vial (2).