Method for producing a screen printing stencil with a laser

Details Method for producing a screen printing stencil with a laser Method for producing a screen printing stencil with a laser

1995-04-26

1997-02-25

Funk, Stephen R.

Printing

Stenciling

Stencils

101484, 101DIG36, 347256, 21912169, 21912183, B41C 114, B23K 2604

Patent

active

056050976

ABSTRACT:
In the production of a screen printing stencil, a thin-walled hollow cylinder having a light responsive layer on the outside is rotated about its cylinder axis and exposed by means of a laser beam impinging on it. The laser beam is focused in the region of the light responsive layer. The laser beam is moved in the direction of the cylinder axis, and is switched on and off in agreement with a desired stencil pattern. A radial deviation of the actual position of the wall of the hollow cylinder from its ideal position is determined from at least one measuring position fixed relative to the laser beam for a multiplicity of circumferential positions of the hollow cylinder. A first actuating signal is then derived from at least one of the radial positional deviations obtained at the measuring positions. The stencil pattern is displaced in accordance with the first actuating signal in the circumferential direction of the hollow cylinder for the purpose of compensating a tangential deviation of the hollow cylinder wall from its ideal position.

REFERENCES:
patent: 3825323 (1974-07-01), Landwer
patent: 4806727 (1989-02-01), Ruckl
patent: 4878127 (1989-10-01), Zollman et al.
patent: 4944826 (1990-07-01), Zollman et al.
patent: 4948940 (1990-08-01), Ruckl
Isakov et al.; "Accuracy Estimation in Checking Cylindrical Surfaces with Circle Gauges"; Aug. 1981, pp. 630-633.
Sysoev et al.; "Method of Measuring Deviations from the Cylindrical Form of Large-Scale Workpieces"; Nov. 1990, pp. 1104-1108.

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