Method of etching apertures into a continuous moving metallic st

Details Method of etching apertures into a continuous moving metallic st Method of etching apertures into a continuous moving metallic st

1982-06-23

1983-06-21

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156644, 156651, 156656, 1566611, 156345, C23F 102, B44F 122, C03C 1500, C03C 2506

Patent

active

043892795

ABSTRACT:
A method of etching a continuous etchable metallic strip from both major surfaces to produce a multiplicity of apertures therethrough, said strip having, on both major surfaces, acid-resistant stencils with openings therein that are registered with one another. The method comprises moving the strip through an etching chamber, spraying liquid etchant toward both of said major surfaces and shielding one of the major surfaces from sprayed liquid etchant during the initial portion of the spraying step. Shielding is achieved by interposing a stationary wall opposite to and spaced from the shielded surface and providing continuous side seals between the wall and the edge portions of the strip.

REFERENCES:
patent: 2750524 (1956-06-01), Braham
patent: 3679500 (1972-07-01), Kubo et al.
patent: 3891491 (1975-06-01), Lerner
patent: 3929551 (1975-12-01), Frantzen
patent: 3971682 (1976-07-01), Frantzen et al.
patent: 4011123 (1977-03-01), Buysman
patent: 4013498 (1977-03-01), Frantzen et al.
patent: 4124437 (1978-11-01), Bond et al.

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