Electric heating – Metal heating – By arc
Patent
1974-08-28
1976-01-06
Kozma, Thomas J.
Electric heating
Metal heating
By arc
118 491, B23K 1500
Patent
active
039314901
ABSTRACT:
To permit coating of wide area work surfaces, such as wide tapes, ribbons and the like, a vaporization substance is retained in an elongated trough, transverse to the direction of movement of the ribbon. Alongside the trough, the pole shoes of magnets are placed to provide a magnetic shield transverse to the longitudinal extent of the trough, and with respect to the direction of movement of the web to be coated. An electron beam is then impinged on the surface of the vaporization substance in the trough at an angle between zero and 90.degree., preferably between 30.degree. and 60.degree. and desirably in the order of about 45.degree. with respect to the direction of the magnetic field, so that the magnetic field and the electron beam will interact to deflect the electron beam to assume a spiral path which penetrates the surface of the vaporization substance. Preferably the characteristics of the electron beam and the magnetic field are so matched that primary electrons dispersed from the vapor, or from stray gases are captured in the magnetic field, and returned to the vaporization substance; likewise, electrons liberated at the impingement points are deflected back to the vaporization substance.
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patent: 3714416 (1973-01-01), Link et al.
Brill Klaus
Grothe Wolfgang
Kozma Thomas J.
Peterson G. R.
Robert Bosch G.m.b.H.
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