Registers – Records
Patent
1988-12-12
1989-11-07
Pitts, Harold I.
Registers
Records
235488, G06K 1902
Patent
active
048794570
ABSTRACT:
In one embodiment of a method for etching a bar code on a metal surface, a carrier web having elongated openings is prepared. These openings correspond in size and position to the dark bars of the bar code. The carrier web is adhesively attached to the metal surface so that fluid cannot seep between the web and the surface. The metal surface is then electrochemically etched through the openings in the web. In another embodiment, a conveyor belt moves supports for metal objects past a printer assembly which includes melted-resin printheads. These melted-resin printheads are similar to ink drop printers except molten droplets of resin are expelled rather than droplets of ink. The resin droplets harden upon contact with the metal to provide a resist pattern. A rectangular opening in a mask is positioned over the resist pattern, and etching is conducted through the opening and resist pattern. The etching employed is preferably electro-chemical etching.
REFERENCES:
patent: 4085314 (1976-04-01), Schultz et al.
patent: 4327283 (1982-04-01), Heyman et al.
patent: 4446362 (1984-02-01), Heyman
patent: 4791284 (1988-12-01), Ludden
Marking Methods, Inc. publication, "What is Electrochemical Etching?" (1986) pp. 1-4 and 12.
Instruction sheet entitled "I.N.T./Image 'n Transfer," (un-dated) 1 page.
Publication of GC Electronics, "P.T.S. Positive Transfer System Printed Circuit Board Marking System," (un-dated) 2 pages.
Advertisement of Monode Marking Products, Inc., (un-dated) three pages.
Advertisement of Lectroetch Company, (un-dated), three pages.
Lectroetch Company publication, "Electrochemical Marking Manual," (1971) pp. 1-21.
Dataproducts advertisement, "SI 480 SI Series Solid Ink Printers," 4 pages.
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