Finger strips replace degrading elastomer seals
A
Warth International product story
Edited by the Engineeringtalk editorial team
Dec 28, 2000
Warth has designed a series of copper beryllium based finger strips which incorporate a high wear resistance closed cell sponge to counter the problem of worn conductive elastomer seals
A critical design consideration for any new telecoms application is successful electromagnetic shielding, but a design that worked a few years ago may not be appropriate for today's faster more compact devices.
One of the aspects that must be considered is wear and tear on the gaskets themselves.
Older style conductive elastomers that were traditionally used to seal around the door of an electronics cabinet can be worn by the slight wiping action of the door closing against the frame of the unit.
This can lead to some conductive particles being dislodged from the gasket and falling into the delicate electronics below.
The more compact nature of the electronics means that these particles represent a real danger of shorting components.
Warth International has designed a series of copper beryllium based finger strips which incorporate a high wear resistance closed cell sponge to counter this problem.
The copper beryllium strips are designed specifically to be compressed and decompressed with a potential wiping action for many years without degradation, and the sponge acts as an environmental seal that can produce results equal to or better than ordinary conductive elastomers.
The finger strips have been designed with a very strong pressure sensitive adhesive running along their lengths, and so can be immediately retrofitted to existing designs or incorporated into newer products.
The fingers are available in a variety of metal finishes to offer the maximum galvanic compatibility.
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