Cassette System for Continuous Cuvette Supply in Analysis Machines
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Solution Overview
Problem
Existing automatic analysis apparatuses face difficulties in efficiently and economically supplying reaction cuvettes, particularly during reel changes, which can lead to prolonged downtime and high costs due to the complexity of attaching and removing cuvette strips.
Innovation Solution
A cassette system with parallel side walls and a sliding shutter for cuvette support, along with a pusher mechanism to move cuvettes simultaneously, allows for the continuous operation of the apparatus by maintaining a buffer storage area with a sufficient cuvette supply, eliminating the need for film connections and simplifying the cuvette handling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If cuvettes are connected in a continuous strip using flexible film, then the cuvettes can be supplied continuously to the apparatus, but the complexity of reel changing increases and operational downtime is prolonged
Solution Approach 1:
The continuous strip of cuvettes is segmented into individual removable cassettes, each containing a specific number of cuvettes (e.g., 100-500 cuvettes per cassette). This segmentation allows operators to easily replace entire cassettes rather than dealing with complex reel mechanisms, reducing operational complexity while maintaining continuous supply capability through buffer storage areas that can hold multiple cassettes.
Solution Approach 2:
Cassettes are pre-loaded with a substantial number of cuvettes before being introduced to the apparatus. This preliminary action allows the buffer storage area to be stocked in advance, enabling continuous operation during cassette replacement and eliminating the need for frequent reel changes.
2Quantity of substance
If flexible film is used to connect and retain cuvettes in a reel, then cuvettes can be stored in large quantities, but the cost of the film increases operational expenses
Solution Approach 1:
The expensive flexible film connecting mechanism is extracted and replaced with simple, inexpensive retention features integrated into the cassette structure. The cassette uses basic mechanical elements such as ribs, fins, and pushers made from the same or similar materials as the cuvettes themselves, eliminating the need for separate costly film materials while maintaining storage capacity.
Solution Approach 2:
The cassette structure is made homogeneous with the cuvettes it holds, using similar materials and manufacturing processes. This eliminates the need for incompatible or specialized materials like flexible film, reducing overall manufacturing costs while maintaining functional integrity.
3Productivity
If operators manually attach film to connect cuvettes to reels, then cuvettes can be organized in continuous strips, but the time required for reel preparation increases
Solution Approach 1:
The cassette structure provides self-organizing features where cuvettes automatically align and secure themselves within the cassette during loading. The pusher mechanism and retention fins work automatically to organize cuvettes without requiring manual film attachment, significantly reducing preparation time while maintaining efficient organization.
4Ease of operation
If the analysis apparatus is stopped for reel changes, then operators can replace empty reels with full ones, but the operational continuity is interrupted
Solution Approach 1:
Multiple cassettes are pre-loaded with cuvettes and stored in the buffer storage area before operation begins. This preliminary preparation allows the apparatus to continue operating from the buffer supply while operators replace empty cassettes in the background, maintaining operational continuity without interruption.
Solution Approach 2:
The buffer storage area acts as an intermediary between the cassettes and the active analysis zone. It decouples the replacement operation from the analysis operation, allowing cassette changes to occur without stopping the apparatus while ensuring continuous supply of cuvettes to the analysis zone.
Data Source
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AI summary
Device for supplying an automatic analysis machine with reaction cuvettes, comprising means (10, 20, 22) that define a housing for a cassette (14) containing superposed rows of reaction cuvettes, a buffer storage zone (16) for reaction cuvettes as they leave the cassette (14) positioned in its housing, and destacking means (18) that take up the cuvettes as they leave the buffer storage zone (16) and convey them one by one to a point at which the cuvettes enter the analysis machine.