Engraving apparatus and method

Facsimile and static presentation processing – Facsimile – Recording apparatus

Patent

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Details

101 1, H04N 124

Patent

active

044384602

ABSTRACT:
An engraving head incorporates a shaft which is supported for high frequency oscillation by axially spaced metal spring elements, and the shaft is acted upon by improved dampening means to minimize undesirable transverse and transient vibrations. A diamond cutting stylus is carried by a holder mounted within an arm projecting from the shaft by means which facilitate convenient removal and resharpening of the stylus. A diamond guide shoe has a flat face which engages the surface to be engraved adjacent the stylus and is supported by means which may be conveniently adjusted without rotation to obtain precision alignment of the face with the surface. A diamond deburring or shaving element has a shearing edge adjacent the stylus and is also supported for convenient angular adjustment to obtain precise alignment. The entire engraving head is pivotally supported by leaf springs and is raised and lowered by power operated means. The apparatus also incorporates a scanning head including an improved optical system for precisely and effectively illuminating and detecting the copy to be engraved. The apparatus further includes a control system which automatically corrects and compensates for unbalance in copy density at repeated lengths on the copy, and the engraver shaft drive is controlled to produce a flat frequency response which passes through the resonant frequency of the oscillating components.

REFERENCES:
patent: 2575546 (1951-11-01), Boyajean
patent: 3964382 (1976-06-01), Baar
patent: 4013831 (1977-03-01), Dolves

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