Metallic wall having knockouts and method of forming

Details Metallic wall having knockouts and method of forming Metallic wall having knockouts and method of forming

1984-04-12

1986-09-16

Friedman, Carl D.

Metal deforming

With cutting

By composite tool

52100, 52516, 52735, 228151, B21D 3102

Patent

active

046114807

ABSTRACT:
An elongated wall formed substantially of metallic material. The wall includes a first surface and a second surface spaced from the first surface. A plurality of spaced knockout portions are disposed in incipient apertures extending through the wall and these knockout portions are adapted to be selectively removed from the remainder of the wall by application of force to the portion to be removed. This force could be applied as by subjecting the knockout to a sharp blow directed to the portion. Each knockout portion so completely fills its corresponding aperture as to render the wall substantially impervious to the passage of fluid. The wall further comprises a coating applied to one of its surfaces. A method of forming the wall is also disclosed.

REFERENCES:
patent: 2114289 (1938-04-01), Draim
patent: 3266051 (1966-08-01), Attwood
patent: 3580122 (1968-12-01), Powell
patent: 3827139 (1974-08-01), Norteman

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