Browse Prior Art Database

Gasket with Capacitive Couple Apron

IP.com Disclosure Number: IPCOM000104162D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Siverling, MM: AUTHOR

Abstract

Disclosed is a conductive electromagnetic interference (EMI) gasket, for seams in cover panels, that does not require the paint, other cosmetic covering, or surface treatment to be either masked during the application process, or removed after the application process, in the area where the gasket is applied.

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Gasket with Capacitive Couple Apron

      Disclosed is a conductive electromagnetic interference (EMI)
gasket, for seams in cover panels, that does not require the paint,
other cosmetic covering, or surface treatment to be either masked
during the application process, or removed after the application
process, in the area where the gasket is applied.

      Fig. 1 shows a typical "finger stock" conformal gasket.  The
fingers 3 are but one means known in the art which are meant to
conform to the gap between conductive panels when they are in a
closed position and provide a conductive path along the seam between
the conductive panels.  The design may include elastic foam or other
means to provide the necessary resilience to achieve good contact
when sandwiched between two panels.  This gasket would rely on
conductive glue or fasteners on its under-surface to achieve contact
to the panel to which it is attached.

      Fig. 2 shows a gasket 3 with the fastening skirt 2 extended.
This allows the gasket to achieve a low impedance to the panel at the
electromagnetic compatibility (EMC) frequencies of concern through
capacitive coupling to the panel.  When the skirt is made wide
enough, it will have enough capacitive conductivity to the panel to
function at the frequencies required.  The paint or coating functions
as a dielectric.  The result is that no surface preparation is
required other than that the panels be clean enough for the gasket to
be physically bonde...