Method for producing a shielding case

Abstract

Method of producing a shielding casing (4) in which there is provided a sealing and shielding profile section (9) which fills a gap between first and second adjoining casing portions (1, 2) and which comprising pasty material is applied under pressure from a coordinate-controlled applicator device (5) having an applicator needle or nozzle directly on toonto the first casing portion and then sets there elastically adhering thereto in self-supporting relationship, wherein the sealing and shielding profile section is produced by simultaneously applying at least one first material (8a) with material properties adapted for a good sealing action and a second material (8b) with material properties adapted to a good shielding action, from the applicator needle or nozzle (6) provided with at least a first and a second passage (6a, 6b), whereby the second material firmly adheres to the first material.

Description

[0001]The subject application is a Continuation Reissue application Ser. No. 12 / 111,943 filed Apr. 29, 2008 of U.S. Reissue patent application Ser. No. 10 / 702,054 ('054 Reissue Application) filed Nov. 5, 2003, which is a reissue application of U.S. Pat. No. 6,312,550('550 Patent) issued Nov. 6, 2001 and filed as a National Stage application of International Application PCT / DE98 / 00682(PCT '682 application) claiming priority of DE 197135242 filed Mar. 5, 1997. <?insert-end id="INS-S-00002" ?>BACKGROUND OF THE INVENTION[0002]Electrically shielding casings for accommodating and electromagnetically shielding units which emit electromagnetic radiation or which are sensitive to electromagnetic radiation have long been known.[0003]While earlier such casings were usually made from metal for obvious reasons, with the onset of the spread thereof on a large scale—for example in relation to mobile telephones or cordless telephones—for cost and weight reasons there has been a change over to...

AI Technical Summary

Benefits of technology

[0025]The degree of deformation of an approximately U-shaped two-component sealing and shielding profile section of solid material can be (relative to the height of the unloaded profile section) 30% or more, and for certain uses preferably up to over 50%. By virtue of special profile cross-sectional configurations, for example the adoption of a lip profile which is at the same time compressible and flexurally deformable, it is possible to addi

Problems solved by technology

In production of a material for the shielding seal however it was found that it was difficult to arrive at an optimum compromise between high elasticity, high conductivity and lowest possible material costs.

A material with an advantageously high shielding action is a plastic material which is filled with a high proportion of silver powder but this is relatively expensive and has only limitedly satisfactory mechanical properties DE39 34 845 A1 describes t

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