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Browse Prior Art Database

Flexible EMI Closure

IP.com Disclosure Number: IPCOM000111892D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Cox, RE: AUTHOR [+3]

Abstract

Disclosed is a simplified means for closing a large cable entry/exit opening in an electronic enclosure to reduce EMI emissions emanating from inside the enclosure through the opening.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Flexible EMI Closure

      Disclosed is a simplified means for closing a large cable
entry/exit opening in an electronic enclosure to reduce EMI emissions
emanating from inside the enclosure through the opening.

      The closure design 1, as depicted in Fig. 1, utilizes a
flexible EMI shield material, such as Gore-Shield*, with construction
as shown in section A-A where by a fabric backing 2 is laminated to
EMI shield material 3 (Fig. 2).

      The flexible material is configured in a cylindrical form per
Fig. 1, with flange 4 at one end for bulkhead termination, a
longitudinal overlap joint 5, a collapsible accordion or spiral style
cylinder construction 6, with a further collapsible arrangement at
the opposite end 7 through use of drawstring 8 and eyelets 9, which
result in cylinder end 7 closure when the drawstring is activated.

      Closure function is further illustrated in a typical
application, as depicted in Fig. 2, whereby a cable bundle 10 enters
an electronic rack enclosure 11 through large opening 12 which is
subsequently restricted due to tightening the flexible closure at the
upper end 12 around the cable bundle 10.  Thus, applications of this
type, which do not contain a more costly I/O panel-type cable
interface at the bulkhead, do realize a reduction in EMI emanations
(non-magnetic field-coupling type) through the use of the subject
flexible closure.

*  Trademark of W. L. Gore & Associates, Inc.