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Machine translation
1. (WO1981000320) ENGRAVING APPARATUS HAVING IMPROVED FREQUENCY AND SCANNING CHARACTERISTICS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/000320    International Application No.:    PCT/US1980/000759
Publication Date: 05.02.1981 International Filing Date: 10.06.1980
IPC:
B23Q 1/34 (2006.01), B23Q 11/00 (2006.01), B23Q 5/027 (2006.01), B41C 1/04 (2006.01), B44B 3/06 (2006.01), H04N 1/40 (2006.01)
Applicants:
Inventors:
Priority Data:
56623 11.07.1979 US
Title (EN) ENGRAVING APPARATUS HAVING IMPROVED FREQUENCY AND SCANNING CHARACTERISTICS
(FR) APPAREIL DE GRAVURE AYANT DES CARACTERISTIQUES AMELIOREES DE FREQUENCE ET D"EXPLORATION
Abstract: front page image
(EN)An engraving head (20) incorporates a shaft (30) which is supported for high frequency oscillation by axially spaced metal spring elements (33), and the shaft is acted upon by improved dampening means (65) to minimize undesirable transverse and transient vibrations. A diamond cutting stylus (45) is carried by a holder (44) mounted within an arm (42) projecting from the shaft to facilitate convenient removal and resharpening of the stylus. A diamond guide shoe (80) has a flat face (81) which engages the surface to be engraved adjacent the stylus and is supported by plate (86) which may be conveniently adjusted without rotation to obtain precision alignment of the face with the surface. A diamond deburring or shaving element (105) has a shearing edge (107) adjacent the stylus and is also supported for convenient angular adjustement to obtain precise alignement. The entire engraving head is pivotally supported by leaf springs (110) and is raised and lowered by power operated mechanism (116-118). The apparatus also incorporates a scanning head including an improved optical system (130) for precisely and effectively illuminating and detecting the copy to be engraved. Circuitry is also provided for automatically correcting and compensating 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.
(FR)Une tete de gravure (20) comprend un arbre (30) qui est supporte en oscillations a haute frequence par des elements ressorts metalliques espaces axialement (33) et des moyens ameliores d"amortissement (65) agissent sur l"arbre pour reduire au minimum les vibrations transversales, passageres et indesirables. Un stylet de taille de diamant (45) est porte par un support (44) monte sur un bras (42) se projetant depuis l"arbre pour faciliter le demontage et l"aiguisage du stylet. Un patin de guidage du diamant (80) possede une face plate (81) qui engage la surface a graver adjacente au style et est supportee par une plaque (86) qui peut etre ajustee de maniere avantageuse sans rotation pour obtenir un alignementprecis de la face avec la surface. Un element de debarbage ou arasage du diamant (105) possede un bord coupant (107) adjacent au stylet et est supporte avec un ajustement angulaire approprie pour obtenir un alignement precis. Toute la tete de gravure est supportee de maniere pivotante par des lames ressorts (110) et un mecanisme d"actionnement (116-118) lui donne un mouvement ascendant et descendant. L"appareil comprend egalement une tete d"exploration qui presente un systeme optique ameliore (130) pour illuminer et detecter de maniere precise et effective la copie a graver. Un circuit est egalement prevu pour corriger et compenser automatiquement le desequilibre de densite dans la copie a des distances repetees sur la copie, et l"entrainement de l"arbre graveur est commande pour produire une reponse de frequence plate qui traverse de la frequence resonante des composants d"oscillation.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)