Electromagnetic interference/radio frequency innterference seal

• US 5,262,588 A
• Filed: 04/16/1993
• Issued: 11/16/1993
• Est. Priority Date: 01/07/1992
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Gallagher, Robert M.
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): Ledynh, Bot L.
• Application Number:
  US08/049,688
• Time in Patent Office: 214 Days
• Field of Search: 174/35 GC, 174/35 R, 174/35 MS, 361/424, 428/40-42, 219/10.55 R, 219/10.55 D
• US Class Current: 174/374
• CPC Class Codes: H05K 9/0015 Gaskets or seals

Abstract

An aluminum foil strip is provided with adhesive strips on one face surrounding the strip of foil. The strip of foil is then positionable and attachable to an electronic cabinet frame over exposed raw metal areas for intimate electrical contact when the cabinet door is closed. This strip of foil provides electrical continuity between the frame and door as well as a seal against EMI/RFI at the cabinet/door interface.

Claims

1. An EMI/RFI shield comprising:

a metal fold strip having edges;

a layer of pressure sensitive adhesive on one side of said metal foil strip, said adhesive being formed in at least two strips spaced apart from one another by a predetermined distance and disposed only proximate said strip edges;

a metal enclosure for enclosing and containing electronic devices;

said foil strip disposed on said enclosure and said pressure sensitive adhesive adhesively engaged with both said foil strip and said enclosure;

said foil strip, said adhesive strips and said enclosure defining an adhesive free region with said foil strip and said enclosure juxtaposed for surface-to-surface contact.

2. The EMI/RFI shield of claim 1 wherein said pressure sensitive adhesive comprises a double face pressure sensitive adhesive tape.

3. The EMI/RFI shield of claim 1 wherein said pressure sensitive adhesive comprises a bead of pressure sensitive adhesive material deposited directly onto a surface of said foil strip.

4. The EMI/RFI shield of claim 2 wherein said tape further comprises additional pressure sensitive adhesive tape placed on said foil strip with portions of said additional tape closely proximate to said strips to provide adhesive proximate all edges of said foil strip.

5. The EMI/RFI shield of claim 3 wherein said tape further comprises additional beads of pressure sensitive adhesive material placed on said foil strip with portions of said additional beads closely proximate to said strips to provide adhesive proximate all edges of said foil strip.