Browse Prior Art Database

Covers for Personal Computer Adapter Card Ports

IP.com Disclosure Number: IPCOM000038848D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Anderson, TH: AUTHOR [+2]

Abstract

Fig. 1 illustrates a unique arrangement of sealing the card adapter port plate area of IBM-style Personal Computers (PCs) to better contain and reduce Electro-Magnetic Interference (EMI) emissions. The port plate cover eliminates the need for dummy port plates that are no longer needed as feature cards are installed. The port plate cover is made of a thin plastic material with an electrically conductive coating or laminate, such as aluminum or copper. The port plate cover may be made of sheet material, die cut and formed or vacuum formed. The cover 10 is formed so that after snap-in installation, the cover is biased so that it lays against the bulkhead on the vertical surfaces 11 and the top surfaces 12. The port areas to be removed are die cut through at the two top corners 13 and the bottom radius 14.

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Covers for Personal Computer Adapter Card Ports

Fig. 1 illustrates a unique arrangement of sealing the card adapter port plate area of IBM-style Personal Computers (PCs) to better contain and reduce Electro-Magnetic Interference (EMI) emissions. The port plate cover eliminates the need for dummy port plates that are no longer needed as feature cards are installed. The port plate cover is made of a thin plastic material with an electrically conductive coating or laminate, such as aluminum or copper. The port plate cover may be made of sheet material, die cut and formed or vacuum formed. The cover 10 is formed so that after snap-in installation, the cover is biased so that it lays against the bulkhead on the vertical surfaces 11 and the top surfaces 12. The port areas to be removed are die cut through at the two top corners 13 and the bottom radius 14. The balance of the tear-out is scored 15. A rectangular slot 15A is provided so that the ties 16 can be broken by prying with a screwdriver 7. Once this is done, the cut-out can be pulled on and torn out because of the reduced tear strength of the scoured outline. The cover 10 is either bowed or formed convex so that it lays flat against the bulkhead when installed. A rib in each area between pull- out openings ensures contact of the web when two or more adjacent port openings are removed. Clearance holes 21 are provided for the screws clamping the card adapter port plates 22. In addition to the better EMI shielding,...