The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 1993
Filed:
Sep. 28, 1990
Applicant:
Inventor:
Peter Laakmann, Seattle, WA (US);
Assignee:
Laser Color Marking, Incorporated, Bothell, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430293 ; 430297 ; 430945 ; 148244 ; 20415741 ; 427 531 ; 427154 ; 427556 ;
Abstract
A method and apparatus for engraving a metal plate in two or more colors. Selected areas of an oxidized aluminum plate are colored by a first dye to which the plate has an affinity. The selected areas may then be sealed by hydration. Portions of the selected areas of the colored oxidized aluminum plate can then be further engraved by the application of a focussed laser beam, which removes any of the first dye and the sealant, thereby restoring the affinity of the selected portions of the plate. The areas of the plate having an affinity for dyes can be colored by secondary and additional colors and shades thereof.