Electric heating – Metal heating – By arc
Patent
1983-11-03
1985-10-08
Albritton, C. L.
Electric heating
Metal heating
By arc
219121EW, 219121EY, 219121EK, B23K 1500
Patent
active
045462321
ABSTRACT:
A method for the topically precise subsequent-engraving of printing cylinders wherein special marks are engraved in the cylinder and evaluated. The marks are engraved in the form of cups forming a cup track. The cups serve as reference marks for an axial feed and start of the subsequent-engraving in a circumferential direction. After the printing cylinder has been mounted in an engraving machine for subsequent-engraving, the cylinder is placed in rotation and the scanner is moved over the previously engraved cup track axially. A maximum of the signals received from the scanner is identified and a location of the maximum in the cup track is retained as a reference value for the axial feed during the following engraving. A cup track is provided with at least one defined gap that is free of cups. A first cup following the gap is identified by means of the scanner and evaluated as a reference location for a start of engraving in the circumferential direction for the following subsequent-engraving.
REFERENCES:
patent: 3404254 (1968-11-01), Jones
patent: 4393295 (1983-07-01), Beisswenger et al.
Beisswenger Siegfried
Boppel Wolfgang
Albritton C. L.
Ing. Rudolf Hell GmbH
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