Matrix engraving by electron beams

Details Matrix engraving by electron beams Matrix engraving by electron beams

1975-02-18

1978-01-31

Truhe, J. V.

Electric heating

Metal heating

By arc

346138, 90 13R, 219121LM, B23K 1500

Patent

active

040717313

ABSTRACT:
The invention provides an improvement for an apparatus which produces engraved printing forms via an electron beam device which is located in a vacuum chamber having an open side facing a peripheral surface of a printing form cylinder and defining therewith an air gap, and an arrangement for effecting relative movement of the vacuum chamber and printing form cylinder while maintaining the air gap. The inventive improvement comprises an annular member having an outer circumferential surface of a diameter corresponding to the outer diameter of the printing form cylinder, and cooperating annular bevelled contact faces provided on respective axial ends of the annular member and printing form cylinder so that, when the contact faces are coaxial and urged into abutment with one another, the outer circumferential surface constitutes an extension of the peripheral surface of the printing form cylinder.

REFERENCES:
patent: 3618464 (1971-11-01), Michaud, Sr.
patent: 3747080 (1973-07-01), Taylor
patent: 3816698 (1974-06-01), Wellendorf et al.
patent: 3816699 (1974-06-01), Wellendorf et al.
patent: 3925607 (1975-12-01), Hauber

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