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Browse Prior Art Database

Electromagnetic Shielding for Data Processing Enclosure With Tambour Door

IP.com Disclosure Number: IPCOM000049762D
Original Publication Date: 1982-Jul-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Soohoo, KM: AUTHOR [+2]

Abstract

A sheet of plastic carrying a metal layer is attached to the inside surface of a tambour door to provide enhanced electromagnetic shielding. The plastic faces the tambour elements to provide low friction where the tambour and the sheet have a relative horizontal motion as the tambour is curved around its U-shaped track. One vertical edge of the sheet is electrically and mechanically attached to the tambour, and the other vertical edge is connected to the door by an elastic element that holds the sheet taut against the door.

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Electromagnetic Shielding for Data Processing Enclosure With Tambour Door

A sheet of plastic carrying a metal layer is attached to the inside surface of a tambour door to provide enhanced electromagnetic shielding. The plastic faces the tambour elements to provide low friction where the tambour and the sheet have a relative horizontal motion as the tambour is curved around its U-shaped track. One vertical edge of the sheet is electrically and mechanically attached to the tambour, and the other vertical edge is connected to the door by an elastic element that holds the sheet taut against the door.

U.S. Patent 4,235,494 describes an enclosure for a date processing apparatus that includes a door with vertical tambour elements. The tambour slides horizontally into a canister that has a U-shaped track. The patent describes various techniques for preventing radiation from leaking into or out of the enclosure through the tambour elements.

The drawing shows a top view of a tambour door moved partly into the U- shaped track of the canister. The canister and other components of the enclosure are not shown. An outer portion of the tambour removed from the canister when the door is closed does not enter the turn of the U-shaped track, and the tambour elements 2 in this region are formed either as a rigid structure without movement between adjacent tambour elements or, as shown, with a solid metal backing plate 3 that provides a high level of shielding. A vertical edge 4 of a...