| 摘要 |
<p>687,704. Plates for producing photographs electrically. BATTELLE DEVELOPMENT CORPORATION. March 28, 1951 [March 31, 1950], No. 7187/51. Drawings to Specification. Class 98 (ii). [Also in Group II] In a method of producing an electrophoto. graphic plate by coating with selenium a support which has a lower electrical resistivity than selenium, molten selenium is sprayed on to the preheated support by means of a stream of inert gas of about the same temperature as the selenium, and cooled so as to form a coating of essentially vitreous selenium, preferably 0.0005-0.002 inches thick, which may then be polished as with a liquid suspension of chromium oxide. The selenium used should contain less than 0.002 per cent of metallic impurities but may contain up to 3 per cent of sulphur as flux. Supports of aluminium, glass, aluminium-coated glass, stainless steel, nickel, and steel, and of thicknesses of 0.003-0.0625 inch are referred to.</p> |
