Histological Slide Feeder Pneumatic Separation
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Solution Overview
Problem
Histological specimen slides often stick together, causing complications in feeding mechanisms and interfering with the proper operation of printers used for printing information on these slides.
Innovation Solution
A method involving a flow of gas, such as a jet or blast of air applied through a nozzle, is used to un-stick adjacent surfaces of slides when removing them from a stack, enhancing the feeding action and preventing sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If slides are stacked with adjacent surfaces in contact for storage and feeding, then space efficiency and ease of storage are improved, but the slides stick together causing feeding mechanism failures and operational interference
Solution Approach 1:
A film of gas is introduced as an intermediary between adjacent slide surfaces to prevent direct contact and sticking. The gas flow creates a protective barrier that allows slides to be fed individually from the stack without adhesion problems, resolving the contradiction between maintaining stack density and ensuring feeding reliability.
Solution Approach 2:
The patent employs pneumatic means (gas flow) to separate and feed slides from the stack. By using controlled gas flow between slide surfaces, the system achieves reliable individual slide extraction while maintaining efficient stacking, thus improving feeding reliability without sacrificing stack density.
2Device complexity
If a conventional feeding mechanism is used without gas flow, then device complexity is reduced, but slides stick together causing feeding failures and operational complications
Solution Approach 1:
The feeding mechanism incorporates pneumatic gas flow to assist in separating and advancing slides through the feeding path. This pneumatic assistance prevents sticking during operation, making the feeding process smoother and more reliable while adding only moderate complexity to the overall device structure.
Solution Approach 2:
The system changes the physical environment parameter by introducing gas flow between slides during feeding operations. This parameter change prevents adhesion and ensures consistent feeding operation, improving ease of operation with a relatively simple addition to the feeding mechanism.
3Reliability
If gas flow is applied to un-stick slides, then feeding reliability is improved, but energy consumption and device complexity increase
Solution Approach 1:
The gas flow is applied partially - only at specific locations and times where sticking is most likely to occur during the feeding process. This targeted application achieves the necessary separation and feeding reliability while minimizing energy consumption compared to continuous or excessive gas flow.
Solution Approach 2:
The pneumatic system is designed to deliver gas flow efficiently at critical points in the feeding mechanism. By using pneumatic principles to direct gas flow precisely where needed to prevent sticking, the system achieves high feeding reliability with optimized energy usage, avoiding waste of gas flow energy.
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
This approach effectively prevents slides from sticking together, ensuring efficient and reliable feeding of slides into the printer, thereby improving the operational reliability of the slide feeding mechanism.
Implementation Method 1
applying a flow of gas to a location that the adjacent surfaces of the first and second slides meet when removing the first slide from the stack
Data Source
AI summary
An apparatus and method for feeding histology specimen slides from a stack of the slides in a slide printer. The stack of slides includes first, next-to-be removed and second slides having adjacent surfaces. A flow of gas is applied to a location that the adjacent surfaces of the first and second slides meet when removing the first slide from the stack. The flow of gas, which may be a jet or blast of air applied through a nozzle, and which may be applied before and/or during the removal of the slide from the stack, helps un-stick the slides to enhance the feeding action.