| 摘要 |
<p>386,316. Photographic processes. TESCHENBRUCK, M. Z. VON, 5, Schwanengasse, Berne, Switzerland. June 29, 1931, No. 18782. Convention date, Sept. 19, 1930. [Class 98 (ii).] In a reflex-copying process green-coloured light is employed. Light of wave-lengths from 560 ÁÁ to 520 ÁÁ may be employed. A blue filter adapted to eliminate light between wavelengths 400-520 ÁÁ and an orange-red filter adapted to eliminate light rays between the wavelengths 560 ÁÁ and 650 ÁÁ may be used. As shown, a half cylinder N of opal glass is mounted in a box R and has a cover P, and contains a lamp L coaxial with the half-cylinder N and surrounded by a green filter M. Lighttight boxes K1, K2 on the top of the cover P contain the sensitive paper H on a removable spool. An endless ribbon G bent round the half-cylinder N presses round the driven roller E1, the idler E2 and the tensioning roller F. The originals are inserted at A1, seized by the rollers B1, C1 and fed over the roller El to the glass cylinder N, while simultaneously the sensitive paper H is fed from the box K1 and moved in contact with the printed side of the original round the half cylinder N. After exposure the original is removed by the rollers E2, B2, C2 through the opening A2, while the exposed paper is wound up on a spool in the box K2 interconnected with the spool in the box K1. The exposed sections may be cut off and delivered simultaneously with the original through the opening A2. The Specification as open to inspection under Sect. 91 comprises also the use of light of wavelengths 650 ÁÁ to 520 ÁÁ, particularly 540 ÁÁ. This subject-matter does not appear in the Specification as accepted.</p> |
