Article die forming method

Details Article die forming method Article die forming method

1984-08-23

1986-04-15

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

1566591, 1566611, 156905, 430323, C23F 102, B44C 122, C03C 1500, C03C 2506

Patent

active

045825661

ABSTRACT:
A method of etching a surface of a metal object to obtain an etch pattern having a plurality of etch depths. The surface is provided with a first etch resistant coating so that at least one first designated surface region remains uncoated and the surface is then subjected to the action of an etching solution to etch the first designated surface region and thereby provide a first pattern part. The etched surface is subsequently provided with a second etch resistant coating so that at least one second designated region thereof remains uncoated, and the surface is then subjected to the action of an etching solution to etch the second designated surface region and thereby provide a second pattern part. At least one of each of the first and second designated regions overlap each other so that the surface is double etched within those regions.

REFERENCES:
patent: 2854336 (1958-09-01), Gutknecht
patent: 4294650 (1981-10-01), Werthmann
patent: 4325779 (1982-04-01), Rossetti

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