Workpiece with abraded machine-readable marking therein and meth

Details Workpiece with abraded machine-readable marking therein and meth Workpiece with abraded machine-readable marking therein and meth

1979-05-21

1984-05-01

Pitts, Harold I.

Registers

Coded record sensors

Particular sensor structure

235487, 235495, G06K 710

Patent

active

044463626

ABSTRACT:
A workpiece having a machine-readable coded marking abraded into the surface thereof. The marking comprises a plurality of related marks, such as bar-code marking, which have substantially different light reflectances than the surrounding surface. The markings may be made by moving a means for abrading a defined surface area along a particular path with respect to the surface to be marked. The abrading means is selectively activated or deactivated according to a prearranged program to selectively abrade the surface.

REFERENCES:
patent: 3702585 (1972-11-01), Landis et al.
patent: 3726212 (1973-04-01), Combs
patent: 3736406 (1973-05-01), Vossen et al.
patent: 3792238 (1974-02-01), Samoel
patent: 3820456 (1974-06-01), Wolfheimer
patent: 3839644 (1974-10-01), Fulton
patent: 3903526 (1975-09-01), Cotter
patent: 4010355 (1977-03-01), Roehrman et al.
patent: 4012716 (1977-03-01), Herrin
patent: 4095095 (1978-06-01), Muraoka et al.
patent: 4166574 (1979-09-01), Yokoyama

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