Electric heating – Metal heating – By arc
Patent
1989-06-16
1990-08-14
Albritton, C. L.
Electric heating
Metal heating
By arc
21912178, 21912183, B23K 2600
Patent
active
049489402
ABSTRACT:
A device (1) for programmed spot treatment of a body with a beam of rays, particularly a laser beam (7), using a lens system (4), in which the point of impact of the beam (7) describes a predetermined pattern on the surface of the body particularly a lacquer sealed rotary screen printing stencil 3a, as a result of a relative movement of the body with respect to the device. According to the invention the device (1) has means for maintaining a constant predetermined distance between the center of the lens system (4) and the center of the point of impact of the beam (7) of rays with the surface of the body. Said means for maintaining a constant distance comprise distance-determining means, preferably a scanner of the optical, inductive or capacitive type, for determining the distance of the surface of the body from a lens system (4) located between a light source and the body, displacement means (11,12,12',14,14',15), preferably electromagnets cooperating with anchoring plates and spring packets, for displacing the lens system, and control means, preferably a microprocessor, for controlling the displacement means (11,12,12',14,14',15) according to the difference between a set value and the measured value of the distance between the lens system and the surface of the body. The stencil 3a is supported by a roller 3.
REFERENCES:
Feinwerktechnik & Messtechnik, vol. 94, No. 1, Jan./Feb. 1986, pp. 37-39, Carl Hanswer Verlag, DE; E. Wagner: "Halbleiterlaser in Systemen der Messtechnik".
Patent Abstracts of Japan, vol. 8, No. 79 (P-267) [1516], Apr. 11, 1984; & JP-A-58 223 107 (Minolta Camera K.K. 24-12-1982).
Patent Abstracts of Japan, vol. 10, No. 241 (P-488) [2297], Aug. 20, 1986; & JP-A-61 72 214 (Nippon Jido Seigyo K.K.) 14-04-1986.
Albritton C. L.
Schablonentechnik Kufstein GmbH
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