Perforated substrate and method of manufacture

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode

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429241245,, H01M 474

Patent

active

055783988

ABSTRACT:
A perforated substrate having half of the perforations formed from one major surface of the substrate and the other half formed from the opposite major surface, the two major surface being coplanar is described. This introduces equal and opposite stress forces into the substrate which essentially cancel each other and provide a product meeting exacting planarity requirements.

REFERENCES:
patent: 793078 (1905-06-01), Hubbell
patent: 1347873 (1920-07-01), Rabe
patent: 1369353 (1921-02-01), Rabe
patent: 2031170 (1935-12-01), Haunz
patent: 2724733 (1955-11-01), Hagspihl et al.
patent: 4105832 (1978-08-01), Sugalski
patent: 4189533 (1980-02-01), Sugalski
patent: 4345452 (1982-08-01), Eberle
patent: 4717633 (1988-01-01), Hauser
patent: 5053292 (1991-10-01), Hasebe et al.

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