Title:
METAL SEAL IMPRESSION
Document Type and Number:
Japanese Patent JPH115354
Kind Code:
A
Abstract:
To provide a metal seal impression having excellent printability.
In an at least printing unit of the metal seal impression, a surface of the unit is executed with ultrafinely and uniformly dispersed protrusions and recesses. The impression is formed of noble metal or its alloy. The protrusions and recesses are treated by wet etching, sputtering, sandblasting, laser treating or CVD treating as needed.
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Inventors:
KANDA MINORU
ISHIWATARI MASAHARU
ISHIWATARI MASAHARU
Application Number:
JP15816997A
Publication Date:
January 12, 1999
Filing Date:
June 16, 1997
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP
International Classes:
B41K1/00; B23K26/00; B41K1/02; C22C5/02; C22C5/04; (IPC1-7): B41K1/00; B23K26/00; B41K1/02; C22C5/02; C22C5/04
Next Patent: JPH0115355