The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1976
Filed:
Aug. 28, 1974
Wolfgang Grothe, Lehningen, DT;
Klaus Brill, Korntal, DT;
Robert Bosch G.m.b.H., Gerlingen-Schillerhohe, DT;
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.